MFS VARIABLE INSURANCE TRUST
485BPOS, 1997-04-30
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<PAGE>
   
   As filed with the Securities and Exchange Commission on April 30, 1997
    
                                                1933 Act File No.  33-74668
                                                 1940 Act File No. 811-8326
- ----------------------------------------------------------------------------
- -----------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, D.C.  20549
                                 ________________

   
                                   FORM N-1A
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
                        POST-EFFECTIVE AMENDMENT NO. 7
                                      AND
                           REGISTRATION STATEMENT
                                     UNDER
                      THE INVESTMENT COMPANY ACT OF 1940
                                 AMENDMENT NO. 8
    

                          MFS VARIABLE INSURANCE TRUST
              (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

                500 Boylston, Street, Boston, Massachusetts  02116
                     (Address of Principal Executive Offices)

       Registrant's Telephone Number, Including Area Code: 617-954-5000
          Stephen E. Cavan, Massachusetts Financial Services Company,
               500 Boylston Street, Boston, Massachusetts  02116
                    (Name and Address of Agent for Service)

                APPROXIMATE DATE OF PROPOSED PUBLIC OFFERING:

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

   
/x/ immediately upon filing pursuant to paragraph (b)
/ / pursuant to paragraph (b)
/ / 60 days after filing pursuant to paragraph (a)(i)
/ / on [DATE] pursuant to paragraph (a)(i)
/ / 75 days after filing pursuant to paragraph (a)(ii)
/ / on [DATE] pursuant to paragraph (a)(ii) of rule 485.
    

If appropriate, check the following box:

/ / this post-effective amendment designates a new effective date for a 
previously filed post-effective amendment

   
Pursuant to Rule 24f-2, the Registrant has registered an indefinite number of 
its Shares of Beneficial Interest, without par value, under the Securities 
Act of 1933.  The Registrant filed a Rule 24f-2 Notice for its fiscal year 
ended December 31, 1996 on February 28, 1997.
    
- -----------------------------------------------------------------------------
- -----------------------------------------------------------------------------

<PAGE>

                        MFS VARIABLE INSURANCE TRUST

                         MFS EMERGING GROWTH SERIES
                              MFS VALUE SERIES
                             MFS RESEARCH SERIES
                        MFS GROWTH WITH INCOME SERIES
                          MFS TOTAL RETURN SERIES
                            MFS UTILITIES SERIES
                           MFS HIGH INCOME SERIES
                       MFS WORLD GOVERNMENTS SERIES
                    MFS STRATEGIC FIXED INCOME SERIES
                               MFS BOND SERIES
                        MFS LIMITED MATURITY SERIES
                          MFS MONEY MARKET SERIES


                            CROSS REFERENCE SHEET


(Pursuant to Rule 404 showing location in Prospectus and/or Statement of 
Additional Information of the responses to the Items in Parts A and B of 
Form N-1A)

<TABLE>
                                                             STATEMENT OF
ITEM NUMBER                                                   ADDITIONAL
FORM N-1A, PART A      PROSPECTUS CAPTION                INFORMATION CAPTION
- -----------------      ------------------                -------------------
<S>                    <C>                               <C>
  1  (a),(b)           Front Cover Page                            *

  2  (a)               Expense Summary                             *

     (b),(c)                    *                                  *

  3  (a)               Condensed Financial Information             *

     (b)                        *                                  *

     (c)               Information Concerning Shares               *
                        of Each Series - Performance
                        Information

     (d)               Condensed Financial Information             *


<PAGE>

                                                             STATEMENT OF
ITEM NUMBER                                                    ADDITIONAL
FORM N-1A, PART A      PROSPECTUS CAPTION                 INFORMATION CAPTION
- -----------------      ------------------                 -------------------

  4  (a)               Front Cover Page; Investment                 *
                        Concept of the Trust;
                        Investment Objectives and
                        Policies; Investment Techniques

     (b)               Investment Objectives and                    *
                        Policies; Investment Techniques

     (c)               Investment Objectives and                    *
                        Policies; Additional Risk Factors

  5  (a)               Investment Concept of the Trust;             *
                        Management of the Series

     (b)               Management of the Series -                   *
                        Investment Adviser;
                        Back Cover Page

     (c)               Management of the Series -                   *
                        Investment Adviser

     (d)               Management of the Series -        Management of the Trust -
                        Administrator                     Administrator

     (e)               Management of the Series -                   *
                        Shareholder Servicing Agent;
                        Back Cover Page

     (f)               Information Concerning Shares                *
                        of Each Series - Expenses;
                        Condensed Financial 
                        Information; Expense Summary

     (g)               Additional Risk Factors - Portfolio          *
                        Trading

     (h)                              *                             *

 5A  (a),(b),(c)                      **                            **

<PAGE>

ITEM NUMBER                                                    ADDITIONAL
FORM N-1A, PART A      PROSPECTUS CAPTION                 INFORMATION CAPTION
- -----------------      ------------------                 -------------------


 6  (a)                 Information Concerning Shares               *
                         of Each Series - Description of
                         Shares, Voting Rights and
                         Liabilities; Information
                         Concerning Shares of Each
                         Series - Purchases and
                         Redemptions

    (b)                 Information Concerning Shares               *
                         of Each Series - Description of
                         Shares, Voting Rights and
                         Liabilities

    (c),(d)                          *                              *

    (e)                 Shareholder Communications                  *

    (f)                 Information Concerning Shares               *
                         of Each Series - Distributions;

    (g)                 Information Concerning Shares               *
                         of Each Series - Tax Status;
                         Information Concerning Shares
                         of Each Series - Distributions

    (h)                              *                              *

 7  (a)                 Management of the Series -                  *
                         Distributor; Back Cover Page

    (b)                 Information Concerning Shares               *
                         of Each Series - Purchases and
                         Redemptions; Information
                         Concerning Shares of Each
                         Series - Net Asset Value

    (c),(d),(e),(f)                  *                              *

    (g)                              *                              *

<PAGE>

ITEM NUMBER                                                    ADDITIONAL
FORM N-1A, PART A      PROSPECTUS CAPTION                 INFORMATION CAPTION
- -----------------      ------------------                 -------------------

  8  (a),(b)           Information Concerning Shares                *
                        of Each Series - Purchases and
                        Redemptions

     (c)                             *                              *

     (d)               Information Concerning Shares                *
                        of Each Series - Purchases and
                        Redemptions

  9                                  *                              *

 10 (a),(b)                          *                  Front Cover Page

 11                                  *                  Front Cover Page

 12                                  *                  General Information and
                                                         Definitions

 13 (a)                              *                  Investment Techniques

    (b)                              *                  Investment Techniques;
                                                         Investment Restrictions

    (c)                              *                  Investment Restrictions

    (d)                Additional Risk Factors -                    *
                        Portfolio Trading

14  (a),(b)                          *                  Management of the Trust -
                                                         Trustees and Officers

    (c)                              *                  Management of the Trust -
                                                         Trustee Compensation
                                                         Table

15  (a)                              *                              *

    (b),(c)                          *                  Management of the Trust

<PAGE>

ITEM NUMBER                                                    ADDITIONAL
FORM N-1A, PART A      PROSPECTUS CAPTION                 INFORMATION CAPTION
- -----------------      ------------------                 -------------------

 16  (a)               Management of the Series -         Management of the Trust -
                        Investment Adviser                 Investment Adviser;
                                                           Management of the Trust -
                                                           Trustees and Officers

     (b)               Management of the Series -         Management of the Trust -
                        Investment Adviser;                Investment Adviser
                        Expenses

     (c)                             *                              *

     (d)               Management of the Series -         Management of the Trust -
                        Administrator                      Administrator

     (e)                             *                    Portfolio Transactions and
                                                           Brokerage Commissions

     (f),(g)                         *                              *

     (h)                             *                    Management of the Trust -
                                                           Custodian; Independent
                                                           Auditors and Financial
                                                           Statements; Back Cover Page

     (i)                             *                    Management of the Trust -
                                                           Shareholder Servicing Agent

 17  (a),(b),(c),                    *                    Portfolio Transactions and
     (d),(e)                                               Brokerage Commissions

 18  (a)                             *                    Description of Shares, Voting
                                                           Rights and Liabilities

     (b)                             *                              *

 19  (a)                             *                              *


<PAGE>

ITEM NUMBER                                                    ADDITIONAL
FORM N-1A, PART A      PROSPECTUS CAPTION                 INFORMATION CAPTION
- -----------------      ------------------                 -------------------

     (b)               Information Concerning Shares      Management of the Trust -
                        of Each Series - Net Asset         Distributor; Determination
                        Value; Information Concerning      of Net Asset Value;
                        Shares of Each Series -            Performance Information -
                        Purchases and Redemptions          Net Asset Value

     (c)                             *                              *

 20                                  *                     Tax Status

 21  (a),(b)                         *                     Management of the Trust -
                                                            Distributor

     (c)                             *                              *

 22  (a),(b)                         *                     Determination of Net Asset
                                                            Value; Performance
                                                            Information

 23                                  *                     Independent Auditors
                                                            and Financial Statements
</TABLE>
_______________________
*  Not Applicable
** Contained in Annual Report

<PAGE>
 
   
<TABLE>
<S>                          <C>
MFS-REGISTERED TRADEMARK-
VARIABLE                     PROSPECTUS
INSURANCE TRUST              May 1, 1997
</TABLE>
    
 
- --------------------------------------------------------------------------------
 
<TABLE>
<S>                                       <C>
MFS-Registered Trademark- VARIABLE
INSURANCE TRUST-SM-
</TABLE>
 
MFS  Variable Insurance Trust (the "Trust") is an open-end management investment
company offering insurance company separate  accounts a selection of  investment
vehicles  for  variable  annuity  and  variable  life  insurance  contracts (the
"Contracts"). Currently the  Trust offers  shares of beneficial  interest of  12
separate  mutual fund series (individually  or collectively hereinafter referred
to as a "Series" or the "Series"):
 
- -- MFS EMERGING GROWTH  SERIES (the  "Emerging Growth Series"),  which seeks  to
   provide long-term growth of capital;
 
- -- MFS VALUE SERIES (the "Value Series"), which seeks capital appreciation;
 
- -- MFS RESEARCH SERIES (the "Research Series"), which seeks to provide long-term
   growth of capital and future income;
 
- -- MFS  GROWTH WITH INCOME SERIES (the "Growth With Income Series"), which seeks
   to provide  reasonable current  income and  long-term growth  of capital  and
   income;
 
- -- MFS TOTAL RETURN SERIES (the "Total Return Series"), which seeks primarily to
   provide  above-average income (compared  to a portfolio  invested entirely in
   equity securities) consistent  with the  prudent employment  of capital,  and
   secondarily  to provide  a reasonable opportunity  for growth  of capital and
   income;
 
- -- MFS UTILITIES SERIES (the "Utilities Series"), which seeks capital growth and
   current income  (income  above  that  available  from  a  portfolio  invested
   entirely in equity securities);
 
- -- MFS  HIGH INCOME SERIES (the "High  Income Series"), which seeks high current
   income  by  investing  primarily  in  a  professionally  managed  diversified
   portfolio  of  fixed  income securities,  some  of which  may  involve equity
   features;
 
   
- -- MFS WORLD GOVERNMENTS  SERIES (the "World  Governments Series"), which  seeks
   not  only preservation  but also  growth of  capital, together  with moderate
   current income;
    
 
- -- MFS STRATEGIC  FIXED INCOME  SERIES (the  "Strategic Fixed  Income  Series"),
   which seeks to maximize current income;
 
- -- MFS BOND SERIES (the "Bond Series"), which seeks primarily to provide as high
   a  level of current income as  is believed consistent with prudent investment
   risk and secondarily to protect shareholders' capital;
 
- -- MFS LIMITED  MATURITY SERIES  (the "Limited  Maturity Series"),  which  seeks
   primarily  to provide as high a level of  current income as is believed to be
   consistent  with  prudent  investment   risk,  and  secondarily  to   protect
   shareholders' capital; and
 
- -- MFS  MONEY MARKET SERIES (the  "Money Market Series"), which  seeks as high a
   level of current income as is considered consistent with the preservation  of
   capital and liquidity.
                              -------------------
 
THE  HIGH INCOME SERIES AND THE STRATEGIC FIXED INCOME SERIES MAY EACH INVEST UP
TO 100%, RESPECTIVELY, OF ITS NET ASSETS IN LOWER RATED BONDS, COMMONLY KNOWN AS
"JUNK BONDS," THAT  ENTAIL GREATER  RISKS, INCLUDING DEFAULT  RISKS, THAN  THOSE
FOUND  IN  HIGHER RATED  SECURITIES. INVESTORS  SHOULD CAREFULLY  CONSIDER THESE
RISKS BEFORE INVESTING (SEE "ADDITIONAL RISK FACTORS -- LOWER RATED BONDS"). THE
EMERGING GROWTH SERIES,  THE VALUE SERIES,  THE RESEARCH SERIES  AND THE  GROWTH
WITH  INCOME SERIES ARE INTENDED FOR INVESTORS WHO UNDERSTAND AND ARE WILLING TO
ACCEPT THE RISKS  ENTAILED IN SEEKING  LONG-TERM GROWTH OF  CAPITAL. BECAUSE  OF
THEIR   INVESTMENT  POLICIES   PERMITTING  INVESTMENT   IN  FOREIGN  SECURITIES,
INVESTMENTS IN EACH SERIES (EXCEPT FOR THE LIMITED MATURITY SERIES AND THE MONEY
MARKET SERIES) MAY BE SUBJECT  TO A GREATER DEGREE  OF RISK THAN INVESTMENTS  IN
OTHER INVESTMENT COMPANIES WHICH INVEST ENTIRELY IN DOMESTIC SECURITIES.
                              -------------------
<PAGE>
  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.
                              -------------------
 
INVESTMENTS IN THE MONEY MARKET SERIES ARE NEITHER INSURED NOR GUARANTEED BY THE
U.S.  GOVERNMENT  AND THERE  IS NO  ASSURANCE THAT  THE SERIES  WILL BE  ABLE TO
MAINTAIN A STABLE NET ASSET VALUE OF $1.00 PER SHARE.
                              -------------------
 
SHARES OF THE TRUST  ARE AVAILABLE AND  ARE BEING MARKETED  AS A POOLED  FUNDING
VEHICLE FOR LIFE INSURANCE COMPANIES WRITING ALL TYPES OF CONTRACTS.
 
   
This  Prospectus sets forth  concisely the information about  each Series that a
prospective investor should know  before applying for  the Contracts offered  by
the  separate accounts of certain  insurance companies ("Participating Insurance
Companies"). Investors are advised  to read this  Prospectus and the  applicable
Contract  prospectus  carefully and  retain them  for  future reference.  If you
require more detailed information, a  Statement of Additional Information  dated
May  1, 1997, as amended or supplemented from time to time ("SAI"), is available
upon request without charge and may be obtained by calling or by writing to  the
Shareholder  Servicing Agent (see back cover  for address and phone number). The
SAI, which is  incorporated by reference  into this Prospectus,  has been  filed
with  the Securities and  Exchange Commission (the "SEC").  The SEC maintains an
Internet World  Wide  Web  site  that  contains  the  SAI,  materials  that  are
incorporated   by  reference  into  this  Prospectus  and  the  SAI,  and  other
information regarding the Series. This Prospectus is available on the  Adviser's
Internet World Wide Web site at http://www.mfs.com.
    
 
   INVESTORS SHOULD READ THIS PROSPECTUS AND RETAIN IT FOR FUTURE REFERENCE.
<PAGE>
TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                                                                                       PAGE
                                                                                                       ---
  <S>                                                                                                  <C>
  1.  Expense Summary................................................................................   4
  2.  Investment Concept of the Trust................................................................   5
  3.  Condensed Financial Information................................................................   6
  4.  Investment Objectives and Policies.............................................................  17
      MFS Emerging Growth Series.....................................................................  17
      MFS Value Series...............................................................................  17
      MFS Research Series............................................................................  18
      MFS Growth With Income Series..................................................................  18
      MFS Total Return Series........................................................................  19
      MFS Utilities Series...........................................................................  19
      MFS High Income Series.........................................................................  21
      MFS World Governments Series...................................................................  22
      MFS Strategic Fixed Income Series..............................................................  23
      MFS Bond Series................................................................................  24
      MFS Limited Maturity Series....................................................................  24
      MFS Money Market Series........................................................................  25
  5.  Investment Techniques..........................................................................  26
  6.  Additional Risk Factors........................................................................  34
  7.  Management of the Series.......................................................................  37
  8.  Information Concerning Shares of Each Series...................................................  40
      Purchases and Redemptions......................................................................  40
      Net Asset Value................................................................................  41
      Distributions..................................................................................  41
      Tax Status.....................................................................................  41
      Description of Shares, Voting Rights and Liabilities...........................................  41
      Performance Information........................................................................  42
      Expenses.......................................................................................  43
      Shareholder Communications.....................................................................  43
  Appendix A -- Description of Bond Ratings..........................................................  A-1
  Appendix B -- Principal Sectors of the Utilities Industry..........................................  B-1
  Appendix C -- Portfolio Composition Charts.........................................................  C-1
</TABLE>
    
 
                                       3
<PAGE>
1.  EXPENSE SUMMARY
 
ANNUAL OPERATING EXPENSES (AS A PERCENTAGE OF AVERAGE NET ASSETS):
   
<TABLE>
<CAPTION>
                                                                MFS
                                                              EMERGING     MFS        MFS      MFS GROWTH
                                                               GROWTH     VALUE     RESEARCH   WITH INCOME
                                                               SERIES     SERIES     SERIES      SERIES
                                                              --------   --------   --------   -----------
<S>                                                           <C>        <C>        <C>        <C>
Management Fee..............................................  0.75%      0.75%      0.75%         0.75%
Other Expenses (after expense limitation)(1)(2).............  0.25%      0.25%      0.25%         0.25%
                                                              --------    ---       --------   -----------
Total Operating Expenses (after expense limitation)(2)......  1.00%      1.00%      1.00%         1.00%
 
<CAPTION>
 
                                                                MFS
                                                               TOTAL       MFS      MFS HIGH    MFS WORLD
                                                               RETURN    UTILITIES   INCOME    GOVERNMENTS
                                                               SERIES     SERIES     SERIES      SERIES
                                                              --------   --------   --------   -----------
<S>                                                           <C>        <C>        <C>        <C>
Management Fee..............................................  0.75%      0.75%      0.75%         0.75%
Other Expenses (after expense limitation)(1)(2).............  0.25%      0.25%      0.25%         0.25%
                                                              --------    ---       --------   -----------
Total Operating Expenses (after expense limitation)(2)......  1.00%      1.00%      1.00%         1.00%
<CAPTION>
 
                                                                MFS
                                                              STRATEGIC               MFS
                                                               FIXED                LIMITED     MFS MONEY
                                                               INCOME    MFS BOND   MATURITY     MARKET
                                                               SERIES     SERIES     SERIES      SERIES
                                                              --------   --------   --------   -----------
<S>                                                           <C>        <C>        <C>        <C>
Management Fee..............................................  0.75%      0.60%      0.55%         0.50%
Other Expenses (after expense limitation)(1)(2).............  0.25%      0.40%      0.45%         0.10%
                                                              --------    ---       --------   -----------
Total Operating Expenses (after expense limitation)(2)......  1.00%      1.00%      1.00%         0.60%
<FN>
- ------------------------
(1)        Each  Series has an expense offset arrangement which reduces the Series' custodian fee based upon the amount of cash
           maintained by  the  Series  with its  custodian  and  dividend disbursing  agent,  and  may enter  into  other  such
           arrangements  and  directed  brokerage arrangements  (which  would also  have  the  effect of  reducing  the Series'
           expenses). Any such fee reductions are not reflected under "Other Expenses."
(2)        The Adviser has agreed to bear expenses for each Series, subject to reimbursement by each Series, such that each
           Series' "Other Expenses" shall not exceed the following percentages of the average daily net assets of the Series
           during the current fiscal year: 0.40% for the Bond Series, 0.45% for the Limited Maturity Series, 0.10% for the
           Money Market Series, and 0.25% for each remaining Series. See "Information Concerning Shares of Each
           Series--Expenses." Otherwise, "Other Expenses" and "Total Operating Expenses" for each Series would be:
</TABLE>
    
 
   
<TABLE>
<CAPTION>
                                                                      "TOTAL OPERATING
                                             "OTHER EXPENSES"             EXPENSES"
                                                  WITHOUT                  WITHOUT
SERIES                                      EXPENSE LIMITATION       EXPENSE LIMITATION
- -----------------------------------------  ---------------------  -------------------------
<S>                                        <C>                    <C>
Emerging Growth..........................             0.41%                    1.16%
Value....................................             3.08%                    3.83%
Research.................................             0.73%                    1.48%
Growth With Income.......................             1.32%                    2.07%
Total Return.............................             1.35%                    2.10%
Utilities................................             2.00%                    2.75%
High Income..............................             0.87%                    1.62%
World Governments........................             1.28%                    2.03%
Strategic Fixed Income...................             1.00%                    1.75%
Bond.....................................             8.85%                    9.45%
Limited Maturity.........................             7.00%                    7.55%
Money Market.............................            27.24%                   27.74%
</TABLE>
    
 
    The  purpose  of  the  expense  table  above  is  to  assist  investors   in
understanding  the various costs  and expenses that a  shareholder of the Series
will bear directly or indirectly. The  Series' annual operating expenses do  not
reflect expenses
 
                                       4
<PAGE>
imposed  by separate accounts of Participating Insurance Companies through which
an investment  in  a Series  is  made or  their  related Contracts.  A  separate
account's  expenses are disclosed  in the prospectus  through which the Contract
relating to that separate account is offered for sale.
 
2.  INVESTMENT CONCEPT OF THE TRUST
 
    The Trust is an open-end, registered management investment company comprised
of the following twelve series:  Emerging Growth Series, Value Series,  Research
Series,  Growth With Income Series, Total  Return Series, Utilities Series, High
Income Series, World  Governments Series,  Strategic Fixed  Income Series,  Bond
Series,  Limited  Maturity Series  and  Money Market  Series.  Each Series  is a
segregated, separately  managed  portfolio of  securities.  All of  the  Series,
except the Utilities Series, World Governments Series and Strategic Fixed Income
Series, are diversified. Additional series may be created from time to time. The
Trust  was organized as a  business trust under the  laws of The Commonwealth of
Massachusetts by a Declaration of Trust dated February 1, 1994.
 
    The Trust  currently  offers shares  of  each Series  to  insurance  company
separate  accounts that fund Contracts. Separate accounts may purchase or redeem
shares at  net asset  value without  any sales  or redemption  charge. Fees  and
charges imposed by a separate account, however, will affect the actual return to
the   holder  of  a  Contract.  A  separate  account  may  also  impose  certain
restrictions or limitations on the  allocation of purchase payments or  Contract
value  to one or more Series, and not  all Series may be available in connection
with a particular Contract. Prospective investors should consult the  applicable
Contract  prospectus for information regarding fees and expenses of the Contract
and separate account and any  applicable restrictions or limitations. The  Trust
assumes no responsibility for such prospectuses.
 
    Shares  of the Series are offered  to the separate accounts of Participating
Insurance Companies  that are  affiliated  or unaffiliated  ("shared  funding").
Shares  of the Series may serve as  the underlying investments for both variable
annuity  and  variable  life  insurance  contracts  ("mixed  funding").  Due  to
differences  in tax treatment or other  considerations, the interests of various
Contract owners might at some time be in conflict. The Trust currently does  not
foresee  any such conflict. Nevertheless, the Trust's Trustees intend to monitor
events in  order to  identify any  material irreconcilable  conflicts which  may
possibly arise and to determine what action, if any, should be taken in response
thereto.  If such a conflict were to occur, one or more separate accounts of the
Participating Insurance Companies might be required to withdraw its  investments
in  one one  or more  Series. This might  force a  Series to  sell securities at
disadvantageous prices.
 
    Individual Contract holders are not the "shareholders" of the Trust. Rather,
the Participating  Insurance  Companies  and their  separate  accounts  are  the
shareholders  or  investors, although  such  companies may  pass  through voting
rights to their Contract holders.
 
    The Trust's Board of Trustees provides broad supervision over the affairs of
the Trust and the Series.  Massachusetts Financial Services Company, a  Delaware
corporation  ("MFS" or the "Adviser"), is the investment adviser to each Series.
A majority of the Trustees of the Trust are not affiliated with the Adviser. The
Adviser is responsible for the management of  the assets of each Series and  the
officers  of the Trust  are responsible for the  operations. The Adviser manages
the Series'  portfolios  from day  to  day  in accordance  with  the  investment
objectives and policies of each Series. The selection of investments and the way
they  are managed  depend on the  conditions and  trends in the  economy and the
financial marketplaces.
 
                                       5
<PAGE>
3.  CONDENSED FINANCIAL INFORMATION
 
   
The following financial information (presented  for each Series which  commenced
investment  operations prior  to December 31,  1996) has been  audited since the
commencement of  investment operations  of such  Series and  should be  read  in
conjunction with the financial statements included in the Series' Annual Reports
to  Shareholders. These financial statements  are incorporated by reference into
the SAI in reliance  upon the report of  the Series' independent auditors  given
upon  their authority as experts in accounting and auditing. The Series' current
independent auditors  are Deloitte  &  Touche LLP.  The Strategic  Fixed  Income
Series had not commenced investment operations prior to December 31, 1996.
    
 
   
                             EMERGING GROWTH SERIES
    
 
   
<TABLE>
<CAPTION>
                                                                      YEAR ENDED          PERIOD ENDED
                                                                   DECEMBER 31, 1996   DECEMBER 31, 1995*
                                                                   -----------------   ------------------
<S>                                                                <C>                 <C>
Per share data (for a share outstanding throughout each period):
Net asset value--beginning of period.............................      $  11.41             $10.00
                                                                       --------             ------
Income from investment operations#--
  Net investment income (loss)Section............................      $  (0.01)            $ 0.01
  Net realized and unrealized gain on investments and foreign
    currency transactions........................................          1.95               1.74
                                                                       --------             ------
    Total from investment operations.............................      $   1.94             $ 1.75
                                                                       --------             ------
Less distributions declared to shareholders--
  From net investment income.....................................      $     --             $(0.01)
  From net realized gain on investments and foreign currency
    transactions.................................................         (0.06)             (0.26)
  In excess of net realized gain on investments and foreign
    currency transactions........................................         (0.05)                --
  Tax return of capital..........................................            --              (0.07)
                                                                       --------             ------
    Total distributions declared to shareholders.................      $  (0.11)            $(0.34)
                                                                       --------             ------
Net asset value--end of period...................................      $  13.24             $11.41
                                                                       --------             ------
                                                                       --------             ------
Total return.....................................................         17.02%             17.41%++
Ratios (to average net assets)/Supplemental dataSection:
  Expenses.......................................................          1.00%              1.00%+
  Net investment income (loss)...................................         (0.08)%             0.10%+
Portfolio turnover...............................................            96%                73%
Average commission rate###.......................................      $ 0.0401                 --
Net assets at end of period (000 omitted)........................      $104,956             $3,869
- ------------------------
</TABLE>
    
 
   
<TABLE>
<C>        <S>
        *  For the period from the commencement of investment operations, July 24, 1995 to December 31, 1995.
        +  Annualized.
       ++  Not annualized.
        #  Per share data is based on average shares outstanding.
      ###  Average commission rate is calculated for Series' with fiscal years beginning on or after September 1, 1995.
  Section  The  Adviser voluntarily agreed to maintain the  expenses of the Series at not  more than 1.00% of average daily
           net assets. To the extent actual expenses were over these limitations, the net investment loss per share and the
           ratios would have been:
 
Net investment loss..............................................         $(0.03)           $(0.18)
Ratios (to average net assets):
  Expenses.......................................................           1.16    %          2.91      %+
  Net investment loss............................................         (0.23)%           (1.78)%+
</TABLE>
    
 
                                       6
<PAGE>
   
                                  VALUE SERIES
    
 
   
<TABLE>
<CAPTION>
                                                                      PERIOD ENDED
                                                                   DECEMBER 31, 1996*
                                                                   -------------------
<S>                                                                <C>
Per share data (for a share outstanding throughout the period):
Net asset value--beginning of period.............................        $ 10.00
                                                                         -------
Income from investment operations#--
  Net investment incomeSection...................................        $  0.07
  Net realized and unrealized gain on investments and foreign
    currency transactions........................................           0.88
                                                                         -------
    Total from investment operations.............................        $  0.95
                                                                         -------
Less distributions declared to shareholders--
  From net investment income.....................................        $ (0.03)
  From net realized gain on investments and foreign currency
    transactions.................................................          (0.21)
  In excess of net realized gain on investments and foreign
    currency transactions........................................          (0.01)
  Tax return of capital..........................................          (0.04)
                                                                         -------
    Total distributions declared to shareholders.................        $ (0.29)
                                                                         -------
Net asset value--end of period...................................        $ 10.66
                                                                         -------
                                                                         -------
Total return.....................................................           8.78%++
Ratios (to average net assets)/Supplemental dataSection:
  Expenses.......................................................           1.00%+
  Net investment income..........................................           1.72%+
Portfolio turnover...............................................             44%
Average commission rate..........................................        $0.0204
Net assets at end of period (000 omitted)........................        $ 1,351
<FN>
- ------------------------
        *  For the period from the commencement of investment operations, August 14, 1996 to December 31, 1996.
        +  Annualized.
       ++  Not annualized.
        #  Per share data is based on average shares outstanding.
  Section  The Adviser voluntarily agreed to maintain the expenses of the  Series at not more than 1.00% of average daily  net
           assets. To the extent actual expenses were over these limitations, the net investment loss per share and the ratios
           would have been:
 
Net investment loss..............................................        $(0.04)
Ratios (to average net assets):
  Expenses.......................................................         3.83%+
  Net investment loss............................................       (1.11)%+
</TABLE>
    
 
                                       7
<PAGE>
   
                                RESEARCH SERIES
    
 
   
<TABLE>
<CAPTION>
                                                                       YEAR ENDED           PERIOD ENDED
                                                                    DECEMBER 31, 1996    DECEMBER 31, 1995*
                                                                   -------------------   ------------------
<S>                                                                <C>                   <C>
Per share data (for a share outstanding throughout each period):
Net asset value--beginning of period.............................        $ 10.89               $10.00
                                                                         -------               ------
Income from investment operations#--
  Net investment incomeSection...................................        $  0.06               $ 0.05
  Net realized and unrealized gain on investments and foreign
    currency transactions........................................           2.37                 1.01
                                                                         -------               ------
    Total from investment operations.............................        $  2.43               $ 1.06
                                                                         -------               ------
Less distributions declared to shareholders--
  From net investment income.....................................        $ (0.02)              $(0.03)
  From net realized gain on investments and foreign currency
    transactions.................................................          (0.16)               (0.14)
  In excess of net realized gain on investments and foreign
    currency transactions........................................          (0.01)                  --
                                                                         -------               ------
    Total distributions declared to shareholders.................        $ (0.19)              $(0.17)
                                                                         -------               ------
Net asset value--end of period...................................        $ 13.13               $10.89
                                                                         -------               ------
                                                                         -------               ------
Total return.....................................................          22.33%               10.62%++
Ratios (to average net assets)/Supplemental dataSection:
  Expenses.......................................................           1.00%                1.00%+
  Net investment income..........................................           0.47%                1.15%+
Portfolio turnover...............................................             56%                  28%
Average commission rate###.......................................        $0.0295                   --
Net assets at end of period (000 omitted)........................        $35,710               $2,530
<FN>
- ------------------------
        *  For the period from the commencement of investment operations, July 26, 1995 to December 31, 1995.
        +  Annualized.
       ++  Not annualized.
        #  Per share data is based on average shares outstanding.
      ###  Average commission rate is calculated for funds with fiscal years beginning on or after September 1, 1995.
  Section  The  Adviser voluntarily agreed to maintain the  expenses of the Series at not  more than 1.00% of average daily
           net assets. To the extent actual expenses were over these limitations, the net investment loss per share and the
           ratios would have been:
 
Net investment loss..............................................               --           $(0.08)
Ratios (to average net assets):
  Expenses.......................................................             1.48    %          3.90      %+
  Net investment loss............................................             --              (1.73)%+
</TABLE>
    
 
                                       8
<PAGE>
   
                           GROWTH WITH INCOME SERIES
    
 
   
<TABLE>
<CAPTION>
                                                                       YEAR ENDED           PERIOD ENDED
                                                                    DECEMBER 31, 1996    DECEMBER 31, 1995*
                                                                   -------------------   ------------------
<S>                                                                <C>                   <C>
Per share data (for a share outstanding throughout each period):
Net asset value--beginning of period.............................        $ 10.61               $10.00
                                                                         -------               ------
Income from investment operations#--
  Net investment incomeSection...................................        $  0.18               $ 0.05
  Net realized and unrealized gain on investments and foreign
    currency transactions........................................           2.42                 0.61
                                                                         -------               ------
    Total from investment operations.............................        $  2.60               $ 0.66
                                                                         -------
Less distributions declared to shareholders--
  From net investment income.....................................        $ (0.09)              $(0.05)
  From net realized gain on investments and foreign currency
    transactions.................................................          (0.13)                  --
  In excess of net realized gain on investments and foreign
    currency transactions........................................          (0.01)                  --
                                                                         -------               ------
    Total distributions declared to shareholders.................        $ (0.23)              $(0.05)
                                                                         -------               ------
Net asset value--end of period...................................        $ 12.98               $10.61
                                                                         -------               ------
                                                                         -------               ------
Total return.....................................................          24.46%                6.64%++
Ratios (to average net assets)/Supplemental dataSection:
  Expenses.......................................................           1.00%                1.00%+
  Net investment income..........................................           1.52%                2.20%+
Portfolio turnover...............................................             41%                   2%
Average commission rate###.......................................        $0.0351                   --
Net assets at end of period (000 omitted)........................        $ 9,174               $  365
<FN>
- ------------------------
        *  For the period from the commencement of investment operations, October 9, 1995 to December 31, 1995.
        +  Annualized.
       ++  Not annualized.
        #  Per share data is based on average shares outstanding.
      ###  Average commission rate is calculated for funds with fiscal years beginning on or after September 1, 1995.
  Section  The Adviser voluntarily agreed to maintain  the expenses of the Series at  not more than 1.00% of average  daily
           net  assets. To the  extent actual expenses  were over these  limitations, the net  investment income (loss) per
           share and the ratios would have been:
 
Net investment income (loss).....................................            $0.05          $ (0.41)
Ratios (to average net assets):
  Expenses.......................................................             2.07    %         21.44      %+
  Net investment income (loss)...................................           0.46%            (18.24)%+
</TABLE>
    
 
                                       9
<PAGE>
   
                              TOTAL RETURN SERIES
    
 
   
<TABLE>
<CAPTION>
                                                                       YEAR ENDED           PERIOD ENDED
                                                                    DECEMBER 31, 1996    DECEMBER 31, 1995*
                                                                   -------------------   ------------------
<S>                                                                <C>                   <C>
Per share data (for a share outstanding throughout each period):
Net asset value--beginning of period.............................        $ 12.25               $10.00
                                                                         -------               ------
Income from investment operations#--
  Net investment incomeSection...................................        $  0.46               $ 0.41
  Net realized and unrealized gain on investments and foreign
    currency transactions........................................           1.30                 2.32
                                                                         -------               ------
    Total from investment operations.............................        $  1.76               $ 2.73
                                                                         -------               ------
Less distributions declared to shareholders--
  From net investment income.....................................        $ (0.21)              $(0.25)
  From net realized gain on investments and foreign currency
    transactions.................................................          (0.09)               (0.23)
                                                                         -------               ------
    Total distributions declared to shareholders.................        $ (0.30)              $(0.48)
                                                                         -------
Net asset value--end of period...................................        $ 13.71               $12.25
                                                                         -------               ------
                                                                         -------               ------
Total return.....................................................          14.37%               27.34%++
Ratios (to average net assets)/Supplemental dataSection:
  Expenses.......................................................           1.00%                1.00%+
  Net investment income..........................................           3.59%                3.83%+
Portfolio turnover...............................................             76%                  16%
Average commission rate###.......................................        $0.0485                   --
Net assets at end of period (000 omitted)........................        $19,250               $2,797
<FN>
- ------------------------
        *  For the period from the commencement of investment operations, January 3, 1995 to December 31, 1995.
        +  Annualized.
       ++  Not annualized.
        #  Per share data is based on average shares outstanding.
      ###  Average commission rate is calculated for funds with fiscal years beginning on or after September 1, 1995.
  Section  The Adviser voluntarily agreed to maintain  the expenses of the Series at  not more than 1.00% of average  daily
           net  assets. To the extent actual expenses were over  these limitations, the net investment income per share and
           the ratios would have been:
 
Net investment income............................................            $0.32             $0.22
Ratios (to average net assets):
  Expenses.......................................................             2.10    %        2.49  %+
  Net investment income..........................................           2.49%               2.09%+
</TABLE>
    
 
                                       10
<PAGE>
   
                                UTILITIES SERIES
    
 
   
<TABLE>
<CAPTION>
                                                                       YEAR ENDED           PERIOD ENDED
                                                                    DECEMBER 31, 1996    DECEMBER 31, 1995*
                                                                   -------------------   ------------------
<S>                                                                <C>                   <C>
Per share data (for a share outstanding throughout each period):
Net asset value--beginning of period.............................        $ 12.57               $10.00
                                                                         -------               ------
Income from investment operations#--
  Net investment incomeSection...................................        $  0.55               $ 0.39
  Net realized and unrealized gain on investments and foreign
    currency transactions........................................           1.78                 3.00
                                                                         -------               ------
    Total from investment operations.............................        $  2.33               $ 3.39
                                                                         -------               ------
Less distributions declared to shareholders--
  From net investment income.....................................        $ (0.35)              $(0.24)
  From net realized gain on investments and foreign currency
    transactions.................................................          (0.88)               (0.58)
  In excess of realized gain on investments and foreign currency
    transactions.................................................          (0.01)                  --
                                                                         -------               ------
    Total distributions declared to shareholders.................        $ (1.24)              $(0.82)
                                                                         -------               ------
Net asset value--end of period...................................        $ 13.66               $12.57
                                                                         -------               ------
                                                                         -------               ------
Total return.....................................................          18.51%               33.94%++
Ratios (to average net assets)/Supplemental dataSection:
  Expenses.......................................................           1.00%                1.00%+
  Net investment income..........................................           4.19%                3.66%+
Portfolio turnover...............................................            121%                  94%
Average commission rate###.......................................        $0.0416                   --
Net assets at end of period (000 omitted)........................        $ 9,572               $2,373
<FN>
- ------------------------
        *  For the period from the commencement of investment operations, January 3, 1995 to December 31, 1995.
        +  Annualized.
       ++  Not annualized.
        #  Per share data is based on average shares outstanding.
      ###  Average commission rate is calculated for funds with fiscal years beginning on or after September 1, 1995.
  Section  The Adviser voluntarily agreed to maintain  the expenses of the Series at  not more than 1.00% of average  daily
           net  assets. To the extent actual expenses were over  these limitations, the net investment income per share and
           the ratios would have been:
 
Net investment income............................................            $0.32             $0.17
Ratios (to average net assets):
  Expenses.......................................................             2.75    %        3.08  %+
  Net investment income..........................................           2.44%               1.62%+
</TABLE>
    
 
                                       11
<PAGE>
   
                               HIGH INCOME SERIES
    
 
   
<TABLE>
<CAPTION>
                                                                       YEAR ENDED           PERIOD ENDED
                                                                    DECEMBER 31, 1996    DECEMBER 31, 1995*
                                                                   -------------------   ------------------
<S>                                                                <C>                   <C>
Per share data (for a share outstanding throughout each period):
Net asset value--beginning of period.............................        $ 10.29               $10.00
                                                                         -------               ------
Income from investment operations#--
  Net investment incomeSection...................................        $  0.89               $ 0.34
  Net realized and unrealized gain on investments................           0.32                 0.18
                                                                         -------               ------
    Total from investment operations.............................        $  1.21               $ 0.52
                                                                         -------               ------
Less distributions declared to shareholders--
  From net investment income.....................................        $ (0.53)              $(0.23)
  From net realized gain on investments..........................          (0.10)                  --
                                                                         -------               ------
    Tota distributions declared to shareholders..................        $ (0.63)              $(0.23)
                                                                         -------               ------
Net asset value--end of period...................................        $ 10.87               $10.29
                                                                         -------               ------
                                                                         -------               ------
Total return.....................................................          11.80%                5.25%++
Ratios (to average net assets)/Supplemental dataSection:
  Expenses.......................................................           1.00%                1.00%+
  Net investment income..........................................           8.18%                8.17%+
Portfolio turnover...............................................            135%                  32%
Net assets at end of period (000 omitted)........................        $12,994               $1,946
<FN>
- ------------------------
        *  For the period from the commencement of investment operations, July 26, 1995 to December 31, 1995.
        +  Annualized.
       ++  Not annualized.
        #  Per share data is based on average shares outstanding.
  Section  The Adviser voluntarily agreed to maintain the expenses of the  Series at not more than 1.00% of average daily  net
           assets.  To the extent  actual expenses were  over these limitations, the  net investment income  per share and the
           ratios would have been:
 
Net investment income............................................        $0.82            $0.20
Ratios (to average net assets):
  Expenses.......................................................        1.62    %        4.38  %+
  Net investment income..........................................           7.56%          4.82%+
</TABLE>
    
 
                                       12
<PAGE>
   
                            WORLD GOVERNMENTS SERIES
    
 
   
<TABLE>
<CAPTION>
                                                                       YEAR ENDED            YEAR ENDED          PERIOD ENDED
                                                                    DECEMBER 31, 1996    DECEMBER 31, 1995    DECEMBER 31, 1994*
                                                                   -------------------   ------------------   ------------------
<S>                                                                <C>                   <C>                  <C>
Per share data (for a share outstanding throughout each period):
Net asset value--beginning of period.............................        $ 10.17               $ 9.82               $10.00
                                                                         -------               ------               ------
Income from investment operations#--
  Net investment incomeSection...................................        $  0.60               $ 0.63               $ 0.17
  Net realized and unrealized gain (loss) on investments and
    foreign currency transactions................................          (0.19)                0.78                (0.09)
                                                                         -------               ------               ------
    Total from investment operations.............................        $  0.41               $ 1.41               $ 0.08
                                                                         -------               ------               ------
Less distributions declared to shareholders--
  From net investment income.....................................        $    --               $(0.42)              $(0.17)
  In excess of net investment income.............................             --                (0.54)               (0.09)
  Tax return of capital..........................................             --                (0.10)                  --
                                                                         -------               ------               ------
    Total distributions declared to shareholders.................        $    --               $(1.06)              $(0.26)
                                                                         -------               ------               ------
Net asset value--end of period...................................        $ 10.58               $10.17               $ 9.82
                                                                         -------               ------               ------
                                                                         -------               ------               ------
Total return.....................................................           4.03%               14.38%                0.79%++
Ratios (to average net assets)/Supplemental dataSection:
  Expenses.......................................................           1.00%                1.00%                1.00%+
  Net investment income..........................................           5.84%                6.05%                4.68%+
Portfolio turnover...............................................            361%                 211%                  62%
Net assets at end of period (000 omitted)........................        $26,023               $7,424               $2,881
</TABLE>
    
 
- ------------------------
 
   
<TABLE>
<C>        <S>
        *  For the period from the commencement of investment operations, June 14, 1994 to December 31, 1994.
        +  Annualized.
       ++  Not annualized.
        #  Per share data is based on average shares outstanding.
  Section  The Adviser voluntarily agreed to maintain the expenses of the Series at not more than 1.00% of average daily  net
           assets.  To the extent actual  expenses were over these  limitations, the net investment  income per share and the
           ratios would have been:
</TABLE>
    
 
   
<TABLE>
<S>                                                                <C>      <C>      <C>
Net investment income............................................  $0.50    $0.53    $0.16
Ratios (to average net assets):
  Expenses.......................................................   2.03%    1.99%    1.10%+
  Net investment income..........................................   4.81%    5.09%    4.58%+
</TABLE>
    
 
                                       13
<PAGE>
   
                                  BOND SERIES
    
 
   
<TABLE>
<CAPTION>
                                                                       YEAR ENDED          PERIOD ENDED
                                                                   DECEMBER 31, 1996    DECEMBER 31, 1995*
                                                                   ------------------   ------------------
<S>                                                                <C>                  <C>
Per share data (for a share outstanding throughout each period):
Net asset value--beginning of period.............................        $10.19               $10.00
                                                                         ------               ------
Income from investment operations#--
  Net investment incomeSection...................................        $ 0.58               $ 0.09
  Net realized and unrealized gain (loss) on investments.........         (0.36)                0.21
                                                                         ------               ------
    Total from investment operations.............................        $ 0.22               $ 0.30
                                                                         ------               ------
Less distributions declared to shareholders--
  From net investment income.....................................        $(0.35)              $(0.09)
  From net realized gain on investments..........................            --                (0.02)
                                                                         ------               ------
    Total distributions declared to shareholders.................        $(0.35)              $(0.11)
                                                                         ------               ------
Net asset value--end of period...................................        $10.06               $10.19
                                                                         ------               ------
                                                                         ------               ------
Total return.....................................................          2.09%                3.02%++
Ratios (to average net assets)/Supplemental dataSection:
  Expenses.......................................................          1.00%                1.00%+
  Net investment income..........................................          5.84%                4.89%+
Portfolio turnover...............................................           231%                  55%
Net assets at end of period (000 omitted)........................        $  853               $  228
<FN>
- ------------------------
        *  For the period from the commencement of investment operations, October 24, 1995 to December 31, 1995.
        +  Annualized.
       ++  Not annualized.
        #  Per share data is based on average shares outstanding.
  Section  The Adviser voluntarily agreed to maintain the expenses of the  Series at not more than 1.00% of average daily  net
           assets. To the extent actual expenses were over these limitations, the net investment loss per share and the ratios
           would have been:
 
Net investment loss..............................................        $ (0.26)            $ (0.70)
Ratios (to average net assets):
  Expenses.......................................................            9.45     %          43.85      %+
  Net investment loss............................................        (2.61)%              (37.96)%+
</TABLE>
    
 
                                       14
<PAGE>
   
                            LIMITED MATURITY SERIES
    
 
   
<TABLE>
<CAPTION>
                                                                      PERIOD ENDED
                                                                   DECEMBER 31, 1996*
                                                                   ------------------
<S>                                                                <C>
Per share data (for a share outstanding throughout the period):
Net asset value--beginning of period.............................        $10.00
                                                                         ------
Income from investment operations#--
  Net investment incomeSection...................................        $ 0.25
  Net realized and unrealized gain on investments and foreign
    currency transactions........................................          0.01
                                                                         ------
    Total from investment operations.............................        $ 0.26
                                                                         ------
Less distributions declared to shareholders--
  From net investment income.....................................        $(0.25)
                                                                         ------
Net asset value--end of period...................................        $10.01
                                                                         ------
                                                                         ------
Total return.....................................................          2.61%++
Ratios (to average net assets)/Supplemental dataSection:
  Expenses.......................................................          1.00%+
  Net investment income..........................................          6.61%+
Portfolio turnover...............................................           109%
Average commission rate..........................................            --
Net assets at end of period (000 omitted)........................        $  523
<FN>
- ------------------------
        *  For the period from the commencement of investment operations, August 14, 1996 to December 31, 1996.
        +  Annualized.
       ++  Not annualized.
        #  Per share data is based on average shares outstanding.
  Section  The  Adviser voluntarily agreed to maintain the expenses of the  Series at not more than 1.00% of average daily net
           assets. To the extent  actual expenses were  over these limitations, the  net investment income  per share and  the
           ratios would have been:
 
Net investment income............................................         $0.01
Ratios (to average net assets):
  Expenses.......................................................         7.55%+
  Net investment income..........................................         0.06%+
</TABLE>
    
 
                                       15
<PAGE>
   
                              MONEY MARKET SERIES
    
 
   
<TABLE>
<CAPTION>
                                                                       YEAR ENDED          PERIOD ENDED
                                                                   DECEMBER 31, 1996    DECEMBER 31, 1995*
                                                                   ------------------   ------------------
<S>                                                                <C>                  <C>
Per share data (for a share outstanding throughout each period):
Net asset value--beginning of period.............................        $ 1.00               $ 1.00
                                                                         ------               ------
Income from investment operations#--
  Net investment incomeSection...................................        $ 0.04               $ 0.04
Less distributions declared to shareholders from net investment
 income..........................................................         (0.04)               (0.04)
                                                                         ------               ------
Net asset value--end of period...................................        $ 1.00               $ 1.00
                                                                         ------               ------
                                                                         ------               ------
Total return.....................................................          4.55%                4.37%++
Ratios (to average net assets)/Supplemental dataSection:
  Expenses.......................................................          0.60%                0.60%+
  Net investment income..........................................          4.53%                4.54%+
Net assets at end of period (000 omitted)........................        $  633               $  180
<FN>
- ------------------------
        *  For the period from the commencement of investment operations, January 3, 1995 to December 31, 1995.
        +  Annualized.
       ++  Not annualized.
        #  Per share data is based on average shares outstanding.
  Section  The  Adviser voluntarily agreed to maintain the expenses of the  Series at not more than 0.60% of average daily net
           assets. To the extent actual expenses were over these limitations, the net investment loss per share and the ratios
           would have been:
 
Net investment loss..............................................        $ (0.21)           $ (0.14)
Ratios (to average net assets):
  Expenses.......................................................           27.74     %         21.54      %+
  Net investment loss............................................       (22.61)%             (16.37)%+
</TABLE>
    
 
                                       16
<PAGE>
4.  INVESTMENT OBJECTIVES AND POLICIES
 
    Each Series has  different investment  objectives which  it pursues  through
separate  investment policies, as described below. The differences in objectives
and policies among the Series can be expected to affect the degree of market and
financial risk to which each  Series is subject and  the return of each  Series.
The  investment objectives  and policies  of each  Series may,  unless otherwise
specifically stated, be changed by the Trustees  of the Trust without a vote  of
the  shareholders. Any investment  involves risk and there  is no assurance that
the objectives of any Series will be achieved.
 
    In addition  to  the specific  investment  practices described  below,  each
Series  may also engage in certain  investment techniques as described under the
caption  "Investment  Techniques"  below  and  in  the  SAI  under  the  caption
"Investment  Techniques." The Series' investments  are subject to certain risks,
as described in the above-referenced sections of this Prospectus and the SAI and
as described below under the caption "Additional Risk Factors."
 
MFS EMERGING GROWTH SERIES  -- The Series seeks  to provide long-term growth  of
capital.  Dividend and  interest income  from portfolio  securities, if  any, is
incidental to the Series' investment objective of long-term growth of capital.
 
   
    The Series' policy is to invest primarily (I.E., at least 80% of its  assets
under  normal circumstances) in common stocks of companies that MFS believes are
early in  their  life  cycle  but  which have  the  potential  to  become  major
enterprises  (emerging  growth  companies). Such  companies  generally  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 the  products,
technologies,  management and market  and other opportunities  which are usually
necessary to become more widely recognized as growth companies. Emerging  growth
companies  can be  of any  size, and  the Series  may invest  in larger  or more
established companies whose rates of earnings growth are expected to  accelerate
because  of  special  factors,  such as  rejuvenated  management,  new products,
changes in consumer demand, or basic changes in the economic environment.  While
the  Series will invest primarily in common stocks, the Series may, to a limited
extent, seek appreciation  in other  types of  securities such  as fixed  income
securities  (which  may be  unrated), 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  invest  in  non-convertible  fixed  income  securities  rated  lower   than
"investment  grade"  (rated  Ba  or lower  by  Moody's  Investors  Service, Inc.
("Moody's") or BB  or lower  by Standard &  Poor's Ratings  Services ("S&P")  or
Fitch  Investors Service, Inc. ("Fitch")) (commonly known as "junk bonds") or in
comparable unrated securities,  when, in  the opinion  of the  Adviser, such  an
investment  presents a greater opportunity for appreciation with comparable risk
to  an  investment  in  "investment  grade"  securities.  Under  normal   market
conditions,  the Series will invest not more than  5% of its net assets in these
securities. For  a  description  of  these  ratings,  see  Appendix  A  to  this
Prospectus.
    
 
    The  nature of investing in emerging  growth companies involves greater risk
than is customarily associated with  investments in more established  companies.
Emerging growth companies often have limited product lines, markets or financial
resources,  and they  may be  dependent on  one-person management.  In addition,
there may be less  research available on many  promising small and medium  sized
emerging  growth companies, making  it more difficult to  find and analyze these
companies.  The  securities  of  emerging  growth  companies  may  have  limited
marketability and may be subject to more abrupt or erratic market movements than
securities  of larger, more established growth  companies or the market averages
in general. Shares of the 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 proven growth stocks.
 
    Consistent with its investment objective  and policies described above,  the
Series  may also invest up to 25% (and generally expects to invest not more than
15%) of  its  net  assets  in  foreign  securities  (including  emerging  market
securities and Brady Bonds) which are not traded on a U.S. exchange.
 
MFS  VALUE SERIES -- The  Value Series' investment objective  is to seek capital
appreciation. Dividend  income, if  any, is  a consideration  incidental to  the
Series' objective of capital appreciation.
 
   
    While  the Series' policy  is to invest  primarily in common  stocks, it may
seek appreciation in other types of  securities such as fixed income  securities
(which may be unrated), convertible securities and warrants when relative values
make such
    
 
                                       17
<PAGE>
   
purchases  appear  attractive  either  as  individual  issues  or  as  types  of
securities  in  certain  economic  environments.   The  Series  may  invest   in
non-convertible  fixed  income securities  rated  lower than  "investment grade"
(rated Ba or lower by Moody's or BB or lower by S&P or Fitch)(commonly known  as
"junk  bonds") or in comparable unrated securities,  when, in the opinion of the
Adviser, such an investment presents a greater opportunity for appreciation with
comparable risk to an investment in "investment grade" securities. Under  normal
market conditions, the Series will invest not more than 25% of its net assets in
these  securities. For a  description of these  ratings, see Appendix  A to this
Prospectus.
    
 
    Consistent with its investment objective  and policies described above,  the
Series  may also invest up to 50% (and generally expects to invest not more than
25%) of  its  net  assets  in  foreign  securities  (including  emerging  market
securities and Brady Bonds) which are not traded on a U.S. exchange. There is no
formula  as to the percentage of assets that  may be invested in any one type of
security. Cash, commercial paper, short-term obligations, repurchase  agreements
or  debt securities are held to provide  for future purchases of common stock or
other securities and may also be held as a temporary defensive measure when  the
Adviser determines security markets to be overvalued.
 
MFS  RESEARCH SERIES -- The Research  Series' investment objective is to provide
long-term growth of capital and future income.
 
   
    The portfolio securities of the Research Series are selected by a  committee
of  investment research  analysts. This  committee includes  investment analysts
employed not only by the Adviser but also by MFS International (U.K.) Limited, a
wholly  owned  subsidiary  of  MFS.  The  Series'  assets  are  allocated  among
industries  by the analysts acting together  as a group. Individual analysts are
then responsible for selecting what they  view as the securities best suited  to
meet   the  Series'   investment  objective   within  their   assigned  industry
responsibility.
    
 
   
    The Research Series'  policy is to  invest a substantial  proportion of  its
assets in equity securities of companies believed to possess better than average
prospects for long-term growth. Equity securities in which the Series may invest
include  the following: common  stocks, preferred stocks  and preference stocks;
securities such as bonds, warrants or  rights that are convertible into  stocks;
and  depositary receipts for those securities. These securities may be listed on
securities exchanges,  traded in  various over-the-counter  markets or  have  no
organized  markets. A smaller proportion of the assets may be invested in bonds,
short-term obligations,  preferred  stocks  or  common  stocks  whose  principal
characteristic is income production rather than growth. Such securities may also
offer opportunities for growth of capital as well as income. In the case of both
growth  stocks  and  income  issues,  emphasis is  placed  on  the  selection of
progressive,  well-managed   companies.   The   Series'   non-convertible   debt
investments,  if any, may consist of "investment grade" securities (rated Baa or
better by Moody's or BBB or better by S&P or by Fitch), and, with respect to  no
more  than  10%  of  the  Series' net  assets,  securities  in  the  lower rated
categories (rated Ba or lower by Moody's or  BB or lower by S&P or by Fitch)  or
securities  which the Adviser believes  to be of similar  quality to these lower
rated securities (commonly  known as "junk  bonds"). For a  description of  bond
ratings, see Appendix A to this Prospectus.
    
 
    Consistent  with its investment objective  and policies described above, the
Series may  also invest  up  to 20%  of its  net  assets in  foreign  securities
(including emerging market securities) which are not traded on a U.S. exchange.
 
MFS  GROWTH  WITH INCOME  SERIES --  The Growth  With Income  Series' investment
objectives are  to provide  reasonable current  income and  long-term growth  of
capital and income.
 
   
    Under normal market conditions, the Growth With Income Series will invest at
least  65% of its assets in equity  securities of companies that are believed to
have long-term prospects for growth and  income. Equity securities in which  the
Series  may invest  include the following:  common stocks,  preferred stocks and
preference stocks;  securities  such  as  bonds, warrants  or  rights  that  are
convertible  into stocks;  and depositary  receipts for  those securities. These
securities  may  be   listed  on   securities  exchanges,   traded  in   various
over-the-counter markets or have no organized markets.
    
 
    Consistent  with its investment objective  and policies described above, the
Series may also invest up to 75% (and generally expects to invest not more  than
15%)  of  its  net  assets  in  foreign  securities  (including  emerging market
securities and Brady Bonds) which are not traded on a U.S. exchange.
 
                                       18
<PAGE>
   
MFS TOTAL RETURN SERIES -- The Total Return Series' primary investment objective
is to provide above-average income (compared to a portfolio invested entirely in
equity securities) consistent with  the prudent employment  of capital, and  its
secondary objective is to provide a reasonable opportunity for growth of capital
and  income, since many securities offering a better than average yield may also
possess growth potential. Thus, in  selecting securities for its portfolio,  the
Series  considers each of  these objectives. Under  normal market conditions, at
least 25% of the Total Return Series' assets will be invested in non-convertible
fixed income securities, and at  least 40% and no more  than 75% of the  Series'
assets  will be  invested in equity  securities. Equity securities  in which the
Series may invest  include the  following: common stocks,  preferred stocks  and
preference  stocks;  securities  such  as bonds,  warrants  or  rights  that are
convertible into stocks;  and depositary  receipts for  those securities.  These
securities   may  be   listed  on   securities  exchanges,   traded  in  various
over-the-counter markets or have no organized markets.
    
 
   
    The Series' policy  is to invest  in a broad  list of securities,  including
short-term  obligations. The list  may be diversified not  only by companies and
industries, but also by type of security.  The Total Return Series may vary  the
percentage of assets invested in any one type of security in accordance with the
Adviser's  interpretation of  economic and  money market  conditions, fiscal and
monetary policy  and underlying  security  values. The  Series'  non-convertible
fixed  income  investments may  consist  of both  "investment  grade" securities
(rated Baa  or better  by Moody's  or BBB  or better  by S&P  or by  Fitch)  and
securities  that are unrated or are in  the lower rating categories (rated Ba or
lower by Moody's or  BB or lower by  S&P or by Fitch)  (commonly known as  "junk
bonds")  including  up to  20%  of its  assets  in non-convertible  fixed income
securities that  are in  these lower  rating categories  and comparable  unrated
securities (see "Additional Risk Factors" below). Generally, most of the Series'
long-term  non-convertible fixed income investments  will consist of "investment
grade" securities. See Appendix A to this Prospectus for a description of  these
ratings.
    
 
    The   Series  may  also  invest  in  United  States  government  securities,
including: (1) U.S. Treasury  obligations, which differ  only in their  interest
rates,  maturities and times of issuance: U.S. Treasury bills (maturities of one
year or less); U.S. Treasury  notes (maturities of one  to ten years); and  U.S.
Treasury  bonds (generally maturities  of greater than ten  years), all of which
are backed  by  the full  faith  and credit  of  the U.S.  Government;  and  (2)
obligations  issued or  guaranteed by  U.S. Government  agencies, authorities or
instrumentalities, 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 ("GNMA"); 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
(collectively,   "U.S.  Government  Securities").   The  term  "U.S.  Government
Securities" also includes  interests in  trusts or  other entities  representing
interests  in obligations that  are backed by  the full faith  and credit of the
U.S. Government  or  are  issued  or guaranteed  by  the  U.S.  Government,  its
agencies, authorities or instrumentalities.
 
    Consistent  with its investment objective  and policies described above, the
Series may  also invest  up  to 20%  of its  net  assets in  foreign  securities
(including emerging market securities and Brady Bonds) which are not traded on a
U.S. exchange.
 
MFS  UTILITIES SERIES --  The Utilities Series' investment  objective is to seek
capital growth and current income (income above that available from a  portfolio
invested entirely in equity securities).
 
   
    The  Utilities Series will seek to achieve its objective by investing, under
normal circumstances, at  least 65% (but  up to  100% at the  discretion of  the
Adviser)  of  its assets  in equity  and  debt securities  of both  domestic and
foreign companies  in the  utilities industry.  Equity securities  in which  the
Series  may invest  include the following:  common stocks;  preferred stocks and
preference stocks;  securities  such  as  bonds, warrants  or  rights  that  are
convertible  into stocks;  and depositary  receipts for  those securities. These
securities  may  be   listed  on   securities  exchanges,   traded  in   various
over-the-counter  markets  or have  no organized  markets. At  least 80%  of the
non-convertible fixed income securities held by the Series will be rated at  the
time  of investment at least Baa by Moody's or BBB by S&P or by Fitch or will be
of comparable  quality  as  determined  by the  Adviser  (see  "Additional  Risk
Factors"  below). See Appendix A  to this Prospectus for  a description of these
ratings. The
    
 
                                       19
<PAGE>
Series may  also  invest in  debt  and equity  securities  of issuers  in  other
industries,  as discussed  below, although  under normal  circumstances not more
than 35% of the Series' assets will be so invested. In addition, the Series  may
hold a portion of its assets in cash and money market instruments.
 
    Companies  in the  utilities industry include  (i) companies  engaged in the
manufacture, production,  generation,  transmission,  sale  or  distribution  of
electric,  gas or other  types of energy,  water or other  sanitary services and
(ii) companies  engaged  in telecommunications,  including  telephone,  cellular
telephones,   telegraph,  satellite,  microwave,   cable  television  and  other
communications media (but  not companies  engaged in  public broadcasting).  The
Adviser  deems a particular company  to be in the  utilities industry if, at the
time of investment, the  Adviser determines that at  least 50% of the  company's
assets or revenues are derived from one or more of those industries. The portion
of  the Utilities Series' assets invested in a particular type of utility and in
equity or  debt securities  will vary  in light  of changes  in interest  rates,
market  conditions  and  economic  conditions  and  other  factors.  For further
information on the  principal sectors  of the  utilities industry  in which  the
Series may invest, see Appendix B to this Prospectus.
 
    Consistent  with its investment objective  and policies described above, the
Series may  also invest  up  to 35%  of its  net  assets in  foreign  securities
(including emerging market securities and Brady Bonds) which are not traded on a
U.S. exchange.
 
    Since   the  Utilities  Series'  investments  are  concentrated  in  utility
securities, the  value of  the Series'  shares will  be especially  affected  by
factors  peculiar to the utilities industry,  and may fluctuate more widely than
the value of shares of a fund that invests in a broader range of industries. The
rates many  utility  companies may  charge  their customers  are  controlled  by
governmental  regulatory commissions which may result  in a delay in the utility
company passing along increases in costs to its customers. Furthermore, there is
no assurance  that  regulatory  authorities  will, in  the  future,  grant  rate
increases  or that  such increases  will be  adequate to  permit the  payment of
dividends on common stocks. Many utility companies, especially electric and  gas
and   other   energy  related   utility  companies,   are  subject   to  various
uncertainties, including: risks of increases in fuel and other operating  costs;
the  high cost of borrowing to  finance capital construction during inflationary
periods; difficulty  obtaining adequate  returns on  invested capital,  even  if
frequent rate increases are approved by public service commissions; restrictions
on  operations and increased costs  and delays as a  result of environmental and
nuclear safety regulations; securing  financing for large construction  projects
during  an inflationary period; difficulties of the capital markets in absorbing
utility debt and equity  securities; difficulty in  raising capital in  adequate
amounts  on reasonable terms in periods  of high inflation and unsettled capital
markets; technological innovations which  may render existing plants,  equipment
or  products obsolete;  the potential impact  of natural  or man-made disasters;
difficulties in obtaining natural gas for resale or fuel for electric generation
at reasonable prices; coping  with the general  effects of energy  conservation,
particularly  in light of changing policies  regarding energy; and special risks
associated with  the  construction and  operation  of nuclear  power  generating
facilities,  including  technical factors  and costs,  and the  possibility that
federal, state and municipal government authorities may from time to time review
existing  requirements  and  impose  additional  requirements.  Certain  utility
companies,  especially gas and telephone utility companies, have in recent years
been affected  by  increased  competition,  which  could  adversely  affect  the
profitability  of such  utility companies. Furthermore,  there are uncertainties
resulting from certain  telecommunications companies'  diversification into  new
domestic  and  international  businesses  as well  as  agreements  by  many such
companies linking  future  rate increases  to  inflation or  other  factors  not
directly related to the active operating profits of the enterprise.
 
    Foreign  utility  companies are  also subject  to regulation,  although such
regulations may or may not be comparable to those in the United States.  Foreign
utility  companies may be more heavily regulated by their respective governments
than utilities in the U.S. and, as  in the U.S., generally are required to  seek
government  approval  for  rate  increases.  In  addition,  since  many  foreign
utilities use fuel that causes more pollution than those used in the U.S.,  such
utilities  may be required to invest in  pollution control equipment to meet any
proposed pollution restrictions. Foreign regulatory systems vary from country to
country and may evolve in ways different from regulation in the U.S.
 
    The Utilities Series is  permitted to invest in  securities of issuers  that
are outside the utilities industry, although under normal circumstances not more
than 35% of the Series' assets will be so invested. Such investments may include
common
 
                                       20
<PAGE>
stocks,  debt  securities (including  municipal  debt securities)  and preferred
stocks and will  be selected to  meet the Series'  investment objective of  both
capital growth and current income. These securities may be issued by either U.S.
or non-U.S. companies. Some of these issuers may be in industries related to the
utilities industry and, therefore, may be subject to similar risks.
 
    Investments  outside the utilities industry may also include U.S. Government
Securities,  as  that   term  is  defined   under  "Investment  Objectives   and
Policies--MFS Total Return Series" above. When and if available, U.S. Government
Securities  may be purchased at a discount  from face value. However, the Series
does not intend to hold such securities to maturity for the purpose of achieving
potential  capital  gains,  unless  current  yields  on  the  securities  remain
attractive.
 
MFS  HIGH INCOME SERIES -- The investment objective of the High Income Series is
to seek high current income by  investing primarily in a professionally  managed
diversified  portfolio of  fixed income  securities, some  of which  may involve
equity features.
 
    Fixed income securities offering the high current income sought by the  High
Income  Series  normally include  those fixed  income  securities which  offer a
current yield above  that generally available  on debt securities  in the  three
highest  rating categories of the recognized  rating agencies (commonly known as
"junk bonds" if  rated below the  four highest categories  of recognized  rating
agencies).  The  Series  may  invest  up  to 100%  of  its  net  assets  in such
securities. For a description of these rating categories, see Appendix A to this
Prospectus and Appendix  C for  a chart showing  the Series'  holdings of  fixed
income  securities broken  down by  rating category  as of  the end  of its most
recent fiscal  year.  (See  "Additional Risk  Factors"  below.)  However,  since
available  yields and yield  differentials vary over time,  no specific level of
income or yield  differential can  ever be assured.  The dividends  paid by  the
Series  will increase  or decrease  in relation  to the  income received  by the
Series from its investments, which would in any case be reduced by the  expenses
of the Series before such income is distributed to its shareholders.
 
    Fixed  income  securities include  preferred and  preference stocks  and all
types of debt obligations of both  domestic and foreign issuers, such as  bonds,
debentures,  notes, equipment  lease certificates,  equipment trust certificates
(including interests in trusts or other entities representing such obligations),
conditional  sales  contracts,  commercial  paper  and  obligations  issued   or
guaranteed  by  the U.S.  Government,  any foreign  government  or any  of their
respective political  subdivisions,  agencies  or  instrumentalities  (including
obligations, such as repurchase agreements, secured by instruments).
 
    Corporate  debt securities may bear fixed, fixed and contingent, or variable
rates of  interest  and may  involve  equity  features, such  as  conversion  or
exchange  rights  or warrants  for the  acquisition of  stock of  the same  or a
different issuer; participations  based on  revenues, sales or  profits; or  the
purchase  of common stock in a unit transaction (where corporate debt securities
and common stock  are offered as  a unit). Under  normal market conditions,  not
more than 25% of the value of the total assets of the High Income Series will be
invested in equity securities, including common stocks, warrants and rights.
 
    Consistent  with its investment objective  and policies described above, the
Series may also invest up to 25% (and generally expects to invest not more  than
10%)  of  its  net  assets  in  foreign  securities  (including  emerging market
securities and Brady Bonds) which are not traded on a U.S. exchange. The  Series
has  authority to invest up  to 25% of its total  assets in securities issued or
guaranteed by foreign governments or  their agencies or instrumentalities.  (See
"Additional Risk Factors" below.)
 
    The High Income Series may invest up to 40% of the value of its total assets
in  each of the electric  utility and telephone industries,  but will not invest
more than 25%  in either of  those industries unless  yields available for  four
consecutive  weeks in the four  highest rating categories on  new issue bonds in
such industry (issue size  of $50 million  or more) have  averaged in excess  of
105%  of yields of  new issue long-term industrial  bonds similarly rated (issue
size of $50 million or  more) and, in the opinion  of the Adviser, the  relative
return  available  from  the  electric utility  or  telephone  industry  and the
relative risk, marketability,  quality and  availability of  securities of  such
industry justifies such an investment.
 
    When  and  if  available, fixed  income  securities  may be  purchased  at a
discount from face  value. However, the  High Income Series  does not intend  to
hold  such securities to maturity for the purpose of achieving potential capital
gains, unless
 
                                       21
<PAGE>
current yields on  these securities  remain attractive.  From time  to time  the
Series  may purchase securities not paying interest  at the time acquired if, in
the opinion of the Adviser, such securities have the potential for future income
or capital appreciation.
 
MFS WORLD  GOVERNMENTS  SERIES  --  The  World  Governments  Series'  investment
objective  is to seek not only preservation but also growth of capital, together
with moderate current income.
 
    The World  Governments  Series seeks  to  achieve its  investment  objective
through   a  professionally   managed,  internationally   diversified  portfolio
consisting  primarily  of  debt  securities  and  to  a  lesser  extent   equity
securities.  The Series  attempts to  provide investors  with an  opportunity to
enhance the  value  and increase  the  protection of  their  investment  against
inflation  and otherwise by taking advantage  of investment opportunities in the
U.S. as well as in other countries where opportunities may be more rewarding. It
is believed that diversification of  assets on an international basis  decreases
the  degree to which events  in any one country,  including the U.S., can affect
the entire portfolio. Although the percentage of the Series' assets invested  in
securities  issued  abroad  and  denominated  in  foreign  currencies  will vary
depending on the state of the economies of the principal countries of the world,
their financial markets  and the relationship  of their currencies  to the  U.S.
dollar,  under  normal  conditions  the  Series'  portfolio  is  internationally
diversified. However,  for  temporary  defensive  reasons  or  during  times  of
international  political or economic uncertainty or  turmoil, most or all of the
Series' investments may be in the U.S.
 
    Under normal economic  and market conditions,  at least 80%  of the  Series'
portfolio  is invested in  debt securities, such  as bonds, debentures, mortgage
securities, notes,  commercial  paper, obligations  issued  or guaranteed  by  a
government  or any of its political subdivisions, agencies or instrumentalities,
certificates of deposit, as well  as debt obligations which  may have a call  on
common stock by means of a conversion privilege or attached warrants.
 
    Consistent  with its investment objective  and policies described above, the
Series may invest up to 100% (and generally expects to invest not more than 80%)
of its net assets  in foreign securities  (including emerging market  securities
and  Brady  Bonds)  which  are  not traded  on  a  U.S.  exchange.  Although the
percentage of the Series'  assets invested in foreign  securities will vary,  at
least  65% of the  Series' assets will  be invested in  at least three different
countries, one of which may be the  U.S., except when the Adviser believes  that
investing  for  temporary defensive  purposes is  appropriate. The  Adviser will
determine the amount of the World  Governments Series' assets to be invested  in
the  U.S. and the amount to be invested abroad. The U.S. assets will be invested
in high  quality  debt  securities and  the  remainder  of the  assets  will  be
diversified among countries where opportunities for total return are expected to
be  most attractive.  It is currently  expected that  investments within foreign
countries will be primarily in  government securities to minimize credit  risks.
The  Series  will not  invest 25%  or more  of the  value of  its assets  in the
securities of any one foreign government. The portfolio will be managed actively
and the asset allocations modified as the Adviser deems necessary.
 
    The World Governments Series will purchase non-dollar securities denominated
in the currency of countries where the interest rate environment as well as  the
general economic climate provide an opportunity for declining interest rates and
currency  appreciation. If  interest rates  decline, such  non-dollar securities
will appreciate in value. If the  currency also appreciates against the  dollar,
the  total investment in  such non-dollar securities  would be enhanced further.
Conversely, a rise in interest rates or decline in currency exchange rates would
adversely affect  the  Series'  return. Investments  in  non-dollar  denominated
securities  are evaluated  primarily on  the strength  of a  particular currency
against the dollar and on the interest rate climate of that country. Currency is
judged on the basis of  fundamental economic criteria (E.G., relative  inflation
levels  and  trends,  growth rate  forecasts,  balance of  payments  status, and
economic policies) as well as technical  and political data. In addition to  the
foregoing,  interest  rates  are  evaluated on  the  basis  of  differentials or
anomalies that  may  exist between  different  countries. The  Series  may  hold
foreign  currency received in connection  with investments in foreign securities
and in  anticipation of  purchasing foreign  securities. (See  "Additional  Risk
Factors" below.)
 
    The  phrase "preservation of capital" when  applied to a domestic investment
company is generally understood to imply that the portfolio is invested in  very
low  risk securities and that the major risk is loss of purchasing power through
the effects
 
                                       22
<PAGE>
of inflation  or major  changes  in interest  rates.  However, while  the  World
Governments  Series invests  in securities  which are  believed to  have minimal
credit risk, an error of  judgment in selecting a  currency or an interest  rate
environment could result in a loss of capital.
 
    It  is  contemplated  that  the  World  Governments  Series'  long-term debt
investments will  consist primarily  of  securities which  are believed  by  the
Adviser  to be of relatively high quality.  If after the Series purchases such a
security, the quality of the  security deteriorates significantly, the  security
will be sold only if the Adviser believes it is advantageous to do so.
 
MFS  STRATEGIC  FIXED  INCOME  SERIES  --  The  Strategic  Fixed  Income Series'
investment objective is to maximize current income.
 
    The Strategic  Fixed  Income  Series  seeks  to  achieve  its  objective  by
investing approximately one-third of its assets in each of the following sectors
of  the fixed income securities markets: (i) U.S. Government Securities, as that
term is defined in "Investment Objectives and Policies--MFS Total Return Series"
above and related options; (ii)  debt securities issued by foreign  governments,
their  political subdivisions and other foreign issuers; and (iii) high yielding
corporate fixed income securities, some of which may involve equity features. By
following this investment strategy, the Series' net asset value is likely to  be
more  stable than that of a fund which  invests in only one of these three fixed
income sectors. The Adviser believes that greater stability would occur because,
in general, each sector  historically has produced  results which are  different
from each other sector, so that significant changes in one sector have tended to
offset  changes in other  sectors. During periods of  unusual market or economic
conditions (such as a collapse of  the high yield corporate fixed income  market
or  a  general contraction  in yields  on foreign  obligations), the  Series may
invest up to 50% of its assets in any one sector and may choose not to invest in
a sector in order to achieve its investment objective. The Series expects  that,
under  normal market conditions,  the maturity of  its portfolio securities will
not exceed 30 years in the U.S. Government sector and 25 years in the  corporate
fixed   income  sector.  At  least  80%  of  the  Series'  assets  under  normal
circumstances will be invested in fixed income securities. The Series may invest
up to 100% of  its net assets  in debt securities rated  below the four  highest
categories of recognized rating agencies (commonly known as "junk bonds").
 
    Consistent  with its investment objective  and policies described above, the
Series does not intend to invest over  50%, but reserves the right to invest  up
to  67%,  of its  net assets  in foreign  securities (including  emerging market
securities and  Brady Bonds)  which are  not traded  on a  U.S. exchange.  These
foreign  securities  shall  include  securities  issued  by  foreign governments
considered stable  by  the  Adviser  and  fixed  income  securities  of  foreign
corporations.  The foreign government securities in  which the Series intends to
invest will generally consist of obligations supported though their authority to
levy taxes by  national, state  or provincial governments  or similar  political
subdivisions. While one-third of the Series' assets normally will be invested in
securities  issued  abroad and  denominated  in foreign  currencies ("non-dollar
securities"), that  amount may  vary depending  on the  relative yield  of  such
securities, the economies of the countries in which the investments are made and
such  countries' financial markets, the interest  rate climate of such countries
and  the  relationship  of  such  countries'  currencies  to  the  U.S.  dollar.
Investments in non-dollar securities and currency will be evaluated on the basis
of  fundamental economic criteria  (E.G., relative inflation  levels and trends,
growth rate forecasts,  balance of  payments status, and  economic policies)  as
well  as technical  and political data.  In addition to  the foregoing, interest
rates are evaluated on  the basis of differentials  or anomalies that may  exist
between  different countries. The  Series may hold  foreign currency for hedging
purposes to  protect  against declines  in  the  U.S. dollar  value  of  foreign
securities  held by the Series and against increases in the U.S. dollar value of
the foreign securities which the Series might purchase. The Series may speculate
in foreign currency when, in the judgment of the Adviser, it would be beneficial
to convert such currency into U.S. dollars at a later date, based on anticipated
changes  in  the  relevant  exchange  rate.  (See  "Investment  Techniques"  and
"Additional Risk Factors" below.)
 
    High  yield corporate fixed  income securities of  both domestic and foreign
issuers (denominated either in  U.S. dollars or foreign  currency) in which  the
Strategic  Fixed Income Series may invest include preferred and preference stock
and  all  types  of  long-  or  short-term  debt  obligations,  such  as  bonds,
debentures,  notes, equipment lease  certificates, equipment trust certificates,
conditional sales contracts and commercial paper (including obligations, such as
repurchase agreements,
 
                                       23
<PAGE>
secured by such instruments). High yield corporate fixed income securities  held
by  the  Series are  ordinarily unrated  or  in the  lower rating  categories of
recognized rating  agencies. (See  "Additional Risk  Factors" below.)  Corporate
fixed  income  securities may  involve equity  features,  such as  conversion or
exchange rights  or warrants  for the  acquisition of  stock of  the same  or  a
different  issuer; participations  based on revenues,  sales or  profits; or the
purchase of common stock in a unit transaction (where corporate debt  securities
and common stock are offered as a unit).
 
    The  Strategic Fixed Income Series may invest up  to 40% of the value of its
total assets in each of the electric utility and telephone industries, but  will
not  invest more than 25% in either  of those industries unless yields available
for four consecutive weeks  in the four highest  rating categories on new  issue
bonds  in such  industry (issue size  of $50  million or more)  have averaged in
excess of 105% of yields of new issue long-term industrial bonds similarly rated
(issue size of $50 million or more).
 
MFS BOND SERIES -- The Bond  Series' primary investment objective is to  provide
as  high a level of current income as  is believed to be consistent with prudent
investment risk. The  Series' secondary  objective is  to protect  shareholders'
capital.
 
    The  Series seeks  to achieve its  investment objective  by investing, under
normal market conditions, at least 65% of its total assets in:
 
    (1) convertible and non-convertible debt securities and preferred stocks;
 
    (2) U.S. Government  Securities, as  defined in  "Investment Objectives  and
       Policies--MFS Total Return Series" above; and
 
    (3)  commercial paper,  repurchase agreements  and cash  or cash equivalents
       (such as certificates of deposit and bankers' acceptances).
 
    Not more than 20% of the Series' net assets will be invested in  convertible
and non-convertible securities rated below the four highest grades of S&P, Fitch
(AAA,  AA, A  or BBB)  or Moody's  (Aaa, Aa,  A or  Baa) and  comparable unrated
securities. For a description of these ratings see Appendix A to this Prospectus
and Appendix  C  for  a chart  showing  the  Series' holdings  of  fixed  income
securities  broken down  by rating  category as  of the  end of  its most recent
fiscal year. For a discussion of the risks of investing in these securities  see
"Additional Risk Factors" below.
 
    Although the Bond Series may purchase Canadian and other foreign securities,
under normal market conditions, it may not invest more than 10% of its assets in
non-dollar  denominated  non-Canadian  foreign  securities,  including  emerging
market securities and Brady Bonds. The Series may hold foreign currency received
in connection  with investments  in  foreign securities  or in  anticipation  of
purchasing foreign securities. (See "Investment Techniques" and "Additional Risk
Factors" below.)
 
    The Bond Series may not directly purchase common stocks. However, the Series
may  retain up to 10%  of its total assets in  common stocks which were acquired
either by conversion of fixed income  securities or by the exercise of  warrants
attached thereto.
 
MFS  LIMITED MATURITY SERIES -- The  Limited Maturity Series' primary investment
objective is to provide as high a level  of current income as is believed to  be
consistent  with prudent investment risk. The  Series' secondary objective is to
protect shareholders' capital.
 
                                       24
<PAGE>
    In seeking to achieve its investment objectives, the Limited Maturity Series
invests,  under normal  market conditions, substantially  all its  assets in the
following securities:
 
    1.    Debt  securities  (including  corporate  asset-backed  securities  and
       mortgage  pass-through securities  discussed below)  which have  a rating
       within the four highest grades as determined by S&P or Fitch (AAA, AA,  A
       or BBB) or Moody's (Aaa, Aa, A or Baa) and comparable unrated securities;
       for  a description  of these  rating categories,  see Appendix  A to this
       Prospectus;
 
    2.  U.S.  Government Securities,  as defined in  "Investment Objectives  and
       Policies--MFS Total Return Series" above; or
 
    3.   Commercial paper, repurchase agreements, cash or cash equivalents (such
       as certificates of deposit and bankers' acceptances).
 
    The Limited Maturity Series will only invest in securities rated within  the
four  highest grades, as determined  by S&P or Moody's  or Fitch, and comparable
unrated securities.  In addition,  the dollar-weighted  average quality  of  the
Series  will be within the three highest grades, as determined by S&P or Moody's
or Fitch (or the Adviser in the case of unrated securities).
 
    Under normal  market conditions,  substantially all  the securities  in  the
Series'  portfolio  will have  remaining  maturities of  five  years or  less or
estimated remaining  average  lives  of five  years  or  less. In  the  case  of
mortgage-backed  and corporate asset-backed securities as well as collateralized
mortgage obligations, the  average life  is likely to  be substantially  shorter
than the stated final maturity as a result of unscheduled principal prepayments.
 
    For purposes of the foregoing investment policy, securities having a certain
maturity  will be deemed to include  securities with an equivalent "duration" of
such securities. "Duration"  is a commonly  used measure of  the longevity of  a
debt  instrument that takes into account the full stream of payments received on
a debt  instrument, including  both interest  and principal  payments, based  on
their  present values.  A debt instrument's  duration is  derived by discounting
principal and interest payments  to their present  value using the  instrument's
current  yield to  maturity and  taking the  dollar-weighted average  time until
those payments will  be received. Contractual  rights to dispose  of a  security
will  be considered in calculating duration because such rights limit the period
during which the Series bears a market risk with respect to the security.
 
    The Limited  Maturity  Series  may  invest  up  to  25%  of  its  assets  in
dollar-denominated  foreign debt  securities which  may include  emerging market
securities and Brady  Bonds. (See "Investment  Techniques" and "Additional  Risk
Factors" below.)
 
MFS  MONEY MARKET SERIES -- The Money  Market Series' investment objective is to
seek as high  a level of  current income  as is considered  consistent with  the
preservation of capital and liquidity.
 
    The  Money  Market  Series  seeks to  achieve  its  investment  objective by
investing  primarily  (I.E.,   at  least   80%  of  its   assets  under   normal
circumstances) in the following instruments:
 
        (a) U.S. Government Securities, as defined in "Investment Objectives and
    Policies--MFS  Total Return  Series" above  (including repurchase agreements
    collateralized by such securities);
 
        (b) obligations of banks (including certificates of deposit and bankers'
    acceptances) which  at the  date of  investment have  capital, surplus,  and
    undivided profits (as of the date of their most recently published financial
    statements)  in excess  of $100,000,000; and  obligations of  other banks or
    savings and loan associations if such obligations are insured by the Federal
    Deposit Insurance  Corporation,  provided that  not  more than  10%  of  the
    Series' total assets will be invested in such insured obligations;
 
                                       25
<PAGE>
        (c) commercial paper which at the date of investment is rated A-1 by S&P
    or  by Fitch or P-1 by Moody's or,  if not rated, is issued or guaranteed as
    to payment  of principal  and interest  by companies  which at  the date  of
    investment  have an outstanding debt  issue rated AA or  better by S&P or by
    Fitch or Aa or better  by Moody's (for a  description of these ratings,  see
    Appendix A to this Prospectus); and
 
        (d)  short-term (maturing  in 13  months or  less) corporate obligations
    which at the date of investment are rated AA or better by S&P or by Fitch or
    Aa or better by Moody's.
 
    The Money Market Series  may also invest  up to 20% of  its total assets  in
debt  instruments not specifically described in  (a) through (d) above, provided
that such  instruments  are  deemed by  the  Trustees  of the  Trust  to  be  of
comparable  high quality and liquidity and provided that such investments are in
accordance with applicable law. The Money Market Series may invest its assets in
the securities of foreign issuers and  in the securities of foreign branches  of
U.S.  banks such as negotiable certificates  of deposit (Eurodollars). Since the
portfolio of the Series may contain such securities, an investment in the Series
may involve a greater degree of risk than an investment in a fund which  invests
only  in debt obligations of U.S. domestic  issuers, due to the possibility that
there may be less  publicly available information,  more volatile markets,  less
securities regulation, less favorable tax provisions, war or expropriation. (See
"Additional Risk Factors" below.)
 
    In  addition, the Money Market Series may invest  up to 75% of its assets in
all finance companies  as a group,  all banks  and bank holding  companies as  a
group  and all utility companies as a  group when, in the opinion of management,
yield differentials and  money market  conditions suggest  such investments  are
advisable  and when cash  is available for such  investments and instruments are
available for purchase which fulfill the  Series' objective in terms of  quality
and marketability.
 
    All  the assets of the  Money Market Series will  be invested in obligations
which mature in  13 months or  less and substantially  all of these  investments
will  be  held  to  maturity;  however,  securities  collateralizing  repurchase
agreements may have maturities in excess  of 13 months. The Money Market  Series
will,   to  the  extent  feasible,   make  portfolio  investments  primarily  in
anticipation of or in response to changing economic and money market  conditions
and  trends. Currently, the dollar-weighted  average maturity of the investments
of the Series may not exceed 90 days.
 
5.  INVESTMENT TECHNIQUES
 
    LENDING OF  PORTFOLIO  SECURITIES:  Each Series  (except  the  Money  Market
Series)  may seek to  increase its income by  lending portfolio securities. Such
loans will usually be made to member firms (and subsidiaries thereof) of the New
York Stock Exchange (the "Exchange") and to member banks of the Federal  Reserve
System,  and would be required to be secured continuously by collateral in cash,
U.S. Treasury securities  or an  irrevocable letter  of credit  maintained on  a
current  basis at an amount at least equal to the market value of the securities
loaned. If the Adviser determines to make securities loans, it is intended  that
the  value of the securities loaned would not exceed 10% of the value of the net
assets of the Series making the loans.
 
    EMERGING MARKET  SECURITIES: Consistent  with their  respective  objectives,
each Series (except the Money Market Series) may invest in securities of issuers
whose  principal activities are  located in emerging  market countries. Emerging
market countries  include any  country  determined by  the  Adviser to  have  an
emerging  market economy,  taking into  account a  number of  factors, including
whether the  country  has a  low-  to  middle-income economy  according  to  the
International  Bank for  Reconstruction and  Development, the  country's foreign
currency debt rating, its political  and economic stability and the  development
of its financial and capital markets. The Adviser determines whether an issuer's
principal  activities are located  in an emerging  market country by considering
such factors as its  country of organization, the  principal trading market  for
its securities and the source of its revenues and assets. The issuer's principal
activities  generally are deemed to  be located in a  particular country if: (a)
the security is issued or guaranteed by the government of that country or any of
its agencies,  authorities or  instrumentalities; (b)  the issuer  is  organized
under   the  laws  of,  and  maintains  a  principal  office  in  that  country;
 
                                       26
<PAGE>
(c) the issuer has its principal securities trading market in that country;  (d)
the issuer derives 50% or more of its total revenues from goods sold or services
performed  in that country; or (e)  the issuer has 50% or  more of its assets in
that country.
 
    BRADY BONDS:  Each  Series (except  the  Research Series  and  Money  Market
Series)  may invest  in Brady  Bonds, which  are securities  created through the
exchange of existing  commercial bank loans  to public and  private entities  in
certain  emerging markets for  new bonds in  connection with debt restructurings
under a  debt restructuring  plan introduced  by former  U.S. Secretary  of  the
Treasury,  Nicholas F. Brady (the "Brady  Plan"). Brady Plan debt restructurings
have been  implemented  to date  in  Argentina, Brazil,  Bulgaria,  Costa  Rica,
Dominican  Republic, Ecuador, Jordan, Mexico,  Nigeria, Panama, the Philippines,
Poland, Uruguay and Venezuela. Brady Bonds  have been issued only recently,  and
for  that  reason  do  not have  a  long  payment history.  Brady  Bonds  may be
collateralized or  uncollateralized,  are  issued  in  various  currencies  (but
primarily the U.S. dollar) and are actively traded in over-the-counter secondary
markets.  U.S.  dollar-denominated,  collateralized Brady  Bonds,  which  may be
fixed-rate bonds or floating-rate bonds, are generally collateralized in full as
to principal by U.S. Treasury zero coupon bonds having the same maturity as  the
bonds.  Brady  Bonds  are  often  viewed  as  having  three  or  four  valuation
components: the collateralized  repayment of  principal at  final maturity;  the
collateralized  interest payments;  the uncollateralized  interest payments; and
any uncollateralized repayment of principal at maturity (these  uncollateralized
amounts  constituting the  "residual risk").  In light  of the  residual risk of
Brady Bonds and the  history of defaults of  countries issuing Brady Bonds  with
respect  to commercial bank loans by public and private entities, investments in
Brady Bonds may be viewed as speculative.
 
    REPURCHASE AGREEMENTS: Each Series may  enter into repurchase agreements  in
order  to earn  income on  available cash or  as a  temporary defensive measure.
Under a  repurchase  agreement, a  Series  acquires securities  subject  to  the
seller's  agreement to repurchase at  a specified time and  price. If the seller
becomes subject to  a proceeding  under the bankruptcy  laws or  its assets  are
otherwise subject to a stay order, the Series' right to liquidate the securities
may be restricted (during which time the value of the securities could decline).
As  discussed in the SAI, each Series has adopted certain procedures intended to
minimize risk.
 
   
    "WHEN-ISSUED" SECURITIES: Each Series (except the Research Series, the World
Governments Series and  the Money Market  Series) may purchase  securities on  a
"when-issued"  or on a "forward delivery" basis, which means that the securities
will be  delivered to  the Series  at  a future  date usually  beyond  customary
settlement time. The commitment to purchase a security for which payment will be
made  on a future date  may be deemed a separate  security. In general, a Series
does not pay  for such  securities until received,  and does  not start  earning
interest on the securities until the contractual settlement date. While awaiting
delivery of securities purchased on such bases, a Series will normally invest in
liquid assets.
    
 
   
    MORTGAGE  "DOLLAR ROLL" TRANSACTIONS:  Each of the  Total Return Series, the
Bond Series, the Strategic  Fixed Income Series,  the World Governments  Series,
the Limited Maturity Series, the High Income Series and the Utilities Series may
enter   into  mortgage  "dollar  roll"  transactions  with  selected  banks  and
broker-dealers pursuant to which a  Series sells mortgage-backed securities  for
delivery  in the future (generally within  30 days) and simultaneously contracts
to repurchase substantially similar (same type, coupon and maturity)  securities
on  a specified future  date. The Series  record these transactions  as sale and
purchase transactions, rather than as borrowing transactions. A Series will only
enter into covered rolls. A "covered roll" is a specific type of dollar roll for
which there  is  an offsetting  cash  position  or a  cash  equivalent  security
position  which matures on or  before the forward settlement  date of the dollar
roll transaction. In the event that the party with whom the Series contracts  to
replace  substantially similar securities on a future date fails to deliver such
securities, the Series may not  be able to obtain  such securities at the  price
specified  in such contract and thus may not benefit from the price differential
between the current sales price and the repurchase price.
    
 
    RESTRICTED SECURITIES: Each  Series (except the  Growth With Income  Series)
may purchase securities that are not registered under the Securities Act of 1933
(the  "1933 Act") ("restricted securities"), including those that can be offered
and
 
                                       27
<PAGE>
   
sold to "qualified  institutional buyers"  under Rule  144A under  the 1933  Act
("Rule 144A securities"). A determination is made based upon a continuing review
of  the trading markets for a specific Rule 144A security, whether such security
is liquid and thus not subject to  the Series' limitation on investing not  more
than  15% of its net assets (not more than  10% of its net assets in the case of
the Money Market  Series) in  illiquid investments.  The Board  of Trustees  has
adopted  guidelines and delegated  to MFS the daily  function of determining and
monitoring the liquidity of  Rule 144A securities.  The Board, however,  retains
oversight,  focusing on factors such as valuation, liquidity and availability of
information. Investing  in  Rule  144A  securities  could  have  the  effect  of
decreasing  the level  of liquidity  in a  Series to  the extent  that qualified
institutional buyers  become for  a time  uninterested in  purchasing Rule  144A
securities held in the Series' portfolio.
    
 
    CORPORATE  ASSET-BACKED SECURITIES: Each of  the Emerging Growth Series, the
Total Return Series,  the Bond  Series, the  Limited Maturity  Series, the  High
Income  Series, the Strategic  Fixed Income Series and  the Utilities Series may
invest in corporate asset-backed securities. These securities, issued by  trusts
and special purpose corporations, are backed by a pool of assets, such as credit
card  and automobile loan receivables, representing  the obligations of a number
of different parties.
 
    Corporate asset-backed securities  present certain risks.  For instance,  in
the  case of credit card receivables, these  securities may not have the benefit
of any security interest in the related collateral. Credit card receivables  are
generally  unsecured and the debtors are entitled  to the protection of a number
of state and federal consumer credit laws,  many of which give such debtors  the
right  to set off certain amounts owed on the credit cards, thereby reducing the
balance due.  Most issuers  of automobile  receivables permit  the servicers  to
retain  possession of the  underlying obligations. If the  servicer were to sell
these obligations to  another party, there  is a risk  that the purchaser  would
acquire  an interest superior to  that of the holders  of the related automobile
receivables. In addition, because of the large number of vehicles involved in  a
typical  issuance and technical  requirements under state  laws, the trustee for
the holders  of  the automobile  receivables  may  not have  a  proper  security
interest in all of the obligations backing such receivables. Therefore, there is
the  possibility  that recoveries  on repossessed  collateral  may not,  in some
cases, be  available to  support payments  on these  securities. The  underlying
assets  (E.G.,  loans)  are  also  subject  to  prepayments  which  shorten  the
securities' weighted average life and may lower their return.
 
    Corporate asset-backed  securities are  often  backed by  a pool  of  assets
representing  the obligations  of a number  of different parties.  To lessen the
effect of  failures by  obligors  on underlying  assets  to make  payments,  the
securities   may  contain  elements  of  credit  support  which  fall  into  two
categories:  (i)  liquidity  protection;  and  (ii)  protection  against  losses
resulting  from  ultimate  default  by  an  obligor  on  the  underlying assets.
Liquidity protection  refers to  the  provision of  advances, generally  by  the
entity  administering the pool of assets, to ensure that the receipt of payments
on the underlying  pool occurs in  a timely fashion.  Protection against  losses
resulting  from ultimate default  ensures payment through  insurance policies or
letters of credit obtained by the issuer or sponsor from third parties. A Series
will not pay any additional or separate  fees for credit support. The degree  of
credit  support  provided  for  each  issue  is  generally  based  on historical
information respecting the level of  credit risk associated with the  underlying
assets.  Delinquency or  loss in  excess of that  anticipated or  failure of the
credit support could  adversely affect  the return on  an investment  in such  a
security.
 
    ZERO  COUPON BONDS, DEFERRED INTEREST BONDS AND PIK BONDS: Each of the Value
Series, the Total  Return Series, the  Bond Series, the  Strategic Fixed  Income
Series, the World Governments Series, the Growth With Income Series, the Limited
Maturity  Series, the High Income Series and  the Utilities Series may invest in
zero coupon bonds. The  Value Series, the Total  Return Series, the Bond  Series
and  the High Income Series  may also invest in  deferred interest bonds and PIK
bonds. Zero coupon and  deferred interest bonds are  debt obligations which  are
issued  or purchased  at a  significant discount  from face  value. The discount
approximates the total  amount of interest  the bonds will  accrue and  compound
over  the period until maturity or the first  interest payment date at a rate of
interest reflecting the  market rate of  the security at  the time of  issuance.
While  zero  coupon  bonds do  not  require  the periodic  payment  of interest,
deferred interest bonds provide for a period of delay before the regular payment
of interest begins. PIK bonds are debt obligations which provide that the issuer
thereof may, at its option, pay interest on such bonds in cash or in the form of
additional  debt   obligations.  Such   investments   benefit  the   issuer   by
 
                                       28
<PAGE>
mitigating  its need for  cash to meet  debt service, but  also require a higher
rate of return to  attract investors who  are willing to  defer receipt of  such
cash.  Such investments may experience greater volatility in market value due to
changes in interest rates than debt  obligations which make regular payments  of
interest.  Each  Series  will accrue  income  on  such investments  for  tax and
accounting purposes, as  required, which  is distributable  to shareholders  and
which,  because no  cash is  received at  the time  of accrual,  may require the
liquidation of other  portfolio securities to  satisfy the Series'  distribution
obligations.
 
    COLLATERALIZED  MORTGAGE OBLIGATIONS AND MULTICLASS PASS-THROUGH SECURITIES:
Each  of  the  Bond  Series,  the  Strategic  Fixed  Income  Series,  the  World
Governments  Series, the Limited Maturity Series, the High Income Series and the
Utilities Series may invest a portion  of its assets in collateralized  mortgage
obligations  or "CMOs,"  which are  debt obligations  collateralized by mortgage
loans or mortgage pass-through securities. Typically, CMOs are collateralized by
certificates issued by GNMA, the Federal National Mortgage Association  ("FNMA")
or  the  Federal  Home Loan  Mortgage  Corporation  ("FHLMC"), but  also  may be
collateralized by whole loans or private mortgage pass-through securities  (such
collateral  collectively referred to as "Mortgage Assets"). Each of these Series
may also invest a  portion of its assets  in multiclass pass-through  securities
which  are interests in a trust composed of Mortgage Assets. CMOs (which include
multiclass pass-through securities)  may be issued  by agencies, authorities  or
instrumentalities  of  the  U.S. Government  or  by private  originators  of, or
investors in, mortgage loans, including savings and loan associations,  mortgage
banks,  commercial banks, investment  banks and special  purpose subsidiaries of
the foregoing. Payments of principal of and interest on the Mortgage Assets, and
any reinvestment income thereon,  provide the funds to  pay debt service on  the
CMOs  or make scheduled distributions on the multiclass pass-through securities.
In a CMO,  a series  of bonds  or certificates  are usually  issued in  multiple
classes  with different maturities. Each  class of CMOs, often  referred to as a
"tranche," is issued  at a  specific fixed  or floating  coupon rate  and has  a
stated  maturity  or  final  distribution  date.  Principal  prepayments  on the
Mortgage Assets may  cause the  CMOs to  be retired  substantially earlier  than
their  stated maturities or final distribution dates, resulting in a loss of all
or part  of the  premium if  any has  been paid.  Certain classes  of CMOs  have
priority  over  others  with  respect  to  the  receipt  of  prepayments  on the
mortgages. Therefore, depending on the type  of CMOs in which a Series  invests,
the  investment may be subject  to a greater or  lesser risk of prepayments than
other types of mortgage-related securities.
 
    Each of  the Bond  Series,  the Strategic  Fixed  Income Series,  the  World
Governments  Series, the Limited Maturity Series, the High Income Series and the
Utilities Series may also invest in  parallel pay CMOs and Planned  Amortization
Class  CMOs ("PAC Bonds"). Parallel pay  CMOs are structured to provide payments
of principal on each payment  date to more than  one class. PAC Bonds  generally
require  payments of a specified  amount of principal on  each payment date. PAC
Bonds are always parallel pay CMOs  with the required principal payment on  such
securities  having  the highest  priority after  interest has  been paid  to all
classes. For a further description of CMOs, parallel pay CMOs and PAC Bonds  and
the risks related to transactions therein, see the SAI.
 
    STRIPPED  MORTGAGE-BACKED SECURITIES: Each of the Bond Series, the Strategic
Fixed Income Series, the World Governments Series and the High Income Series may
invest a portion of its assets in stripped mortgage-backed securities  ("SMBS"),
which  are derivative multiclass mortgage securities usually structured with two
classes  that   receive  different   proportions  of   interest  and   principal
distributions  from  an  underlying  pool  of  mortgage  assets.  For  a further
description of SMBS and the risks related to transactions therein, see the SAI.
 
    LOAN PARTICIPATIONS  AND OTHER  DIRECT INDEBTEDNESS:  Each of  the  Emerging
Growth Series, the Value Series, the Total Return Series, the High Income Series
and  the Strategic  Fixed Income Series  may invest  a portion of  its assets in
"loan participations"  and  other  direct indebtedness.  By  purchasing  a  loan
participation,  a Series acquires some or all of the interest of a bank or other
lending institution  in a  loan to  a corporate  borrower. Many  such loans  are
secured, and most impose restrictive covenants which
 
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<PAGE>
must  be met by the borrower. These loans are made generally to finance internal
growth, mergers, acquisitions, stock  repurchases, leveraged buy-outs and  other
corporate  activities. Such loans may  be in default at  the time of purchase. A
Series may also purchase other direct indebtedness such as trade or other claims
against companies, which  generally represent  money owed  by the  company to  a
supplier  of goods and  services. These claims  may also be  purchased at a time
when the company  is in default.  Certain of the  loan participations and  other
direct indebtedness acquired by a Series may involve revolving credit facilities
or other standby financing commitments which obligate a Series to pay additional
cash on a certain date or on demand.
 
    The highly leveraged nature of many such loans and other direct indebtedness
may  make such  loans especially  vulnerable to  adverse changes  in economic or
market conditions. Loan participations and other direct indebtedness may not  be
in  the form of  securities or may  be subject to  restrictions on transfer, and
only limited opportunities may exist to resell such instruments. As a result,  a
Series  may be unable to sell such investments  at an opportune time or may have
to resell them at less than fair market value. For a further discussion of  loan
participations,  other direct indebtedness and the risks related to transactions
therein, see the SAI.
 
    MORTGAGE PASS-THROUGH SECURITIES: Each of the Total Return Series, the  Bond
Series,  the World Governments Series, the  Limited Maturity Series and the High
Income Series may  invest in  mortgage pass-through  securities. Mortgage  pass-
through  securities are securities representing interests in "pools" of mortgage
loans. The Utilities Series may invest in mortgage pass-through securities  that
are  securities issued or  guaranteed as to  principal and interest  by the U.S.
Government, its agencies, authorities or instrumentalities. Monthly payments  of
interest  and  principal by  the individual  borrowers  on mortgages  are passed
through to the  holders of the  securities (net of  fees paid to  the issuer  or
guarantor  of the securities) as the  mortgages in the underlying mortgage pools
are paid off. Payment  of principal and interest  on some mortgage  pass-through
securities  (but  not the  market  value of  the  securities themselves)  may be
guaranteed by the full faith and credit  of the U.S. Government (in the case  of
securities  guaranteed  by  GNMA); or  guaranteed  by  U.S. Government-sponsored
corporations  (such  as  FNMA  or  FHLMC,  which  are  supported  only  by   the
discretionary  authority  of  the  U.S.  Government  to  purchase  the  agency's
obligations). Mortgage  pass-through  securities  may also  be  issued  by  non-
governmental  issuers (such as commercial  banks, savings and loan institutions,
private mortgage  insurance  companies,  mortgage bankers  and  other  secondary
market issuers). See the SAI for a further discussion of these securities.
 
    INDEXED  SECURITIES: Each of the Value  Series, the Total Return Series, the
High Income  Series,  the  Bond  Series, the  Utilities  Series  and  the  World
Governments  Series may  invest in indexed  securities whose value  is linked to
foreign currencies,  interest rates,  commodities,  indices or  other  financial
indicators.  Most indexed securities are short to intermediate term fixed income
securities whose  values at  maturity (I.E.,  principal value)  and/or  interest
rates  rise or fall according to the  change in one or more specified underlying
instruments. Indexed securities may be  positively or negatively indexed  (I.E.,
their  principal  value  or  interest  rates may  increase  or  decrease  if the
underlying instrument appreciates), and may have return characteristics  similar
to  direct investments in the underlying instrument or to one or more options on
the underlying  instrument. Indexed  securities may  be more  volatile than  the
underlying instrument itself.
 
    SWAPS  AND  RELATED TRANSACTIONS:  As one  way of  managing its  exposure to
different types  of investments,  each  of the  High  Income Series,  the  World
Governments  Series, the Strategic Fixed Income  Series, the Bond Series and the
Limited Maturity Series may enter into  interest rate swaps, currency swaps  and
other  types of  available swap  agreements, such  as caps,  collars and floors.
Swaps involve the exchange by a Series with another party of cash payments based
upon different interest  rate indexes,  currencies, and other  prices or  rates,
such  as the  value of  mortgage prepayment rates.  For example,  in the typical
interest rate swap, a Series might exchange a sequence of cash payments based on
a floating rate index for cash payments based on a fixed rate. Payments made  by
both parties to a swap transaction are based on a principal amount determined by
the parties.
 
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<PAGE>
    Each  of the High Income Series, the World Governments Series, the Strategic
Fixed Income Series, the  Bond Series and the  Limited Maturity Series may  also
purchase and sell caps, floors and collars. In a typical cap or floor agreement,
one party agrees to make payments only under specified circumstances, usually in
return for payment of a fee by the counterparty. For example, the purchase of an
interest  rate cap  entitles the  buyer, to  the extent  that a  specified index
exceeds a predetermined  interest rate,  to receive  payments of  interest on  a
contractually-based principal amount from the counterparty selling such interest
rate  cap.  The sale  of an  interest rate  floor obligates  the seller  to make
payments to the extent that a specified interest rate falls below an agreed-upon
level. A collar  arrangement combines  elements of buying  a cap  and selling  a
floor.
 
    Swap  agreements will tend  to shift a Series'  investment exposure from one
type of  investment to  another. For  example, if  a Series  agreed to  exchange
payments  in dollars for payments  in foreign currency, in  each case based on a
fixed rate, the swap agreement would tend to decrease a Series' exposure to U.S.
interest rates and increase its exposure to foreign currency and interest rates.
Caps and floors have an effect  similar to buying or writing options.  Depending
on  how they  are used,  swap agreements  may increase  or decrease  the overall
volatility of a Series' investments and its share price and yield.
 
    Swap agreements are sophisticated hedging instruments that typically involve
a small investment  of cash relative  to the  magnitude of risks  assumed. As  a
result,  swaps can be  highly volatile and  may have a  considerable impact on a
Series' performance.  Swap  agreements  are  subject to  risks  related  to  the
counterparty's   ability  to   perform,  and  may   decline  in   value  if  the
counterparty's creditworthiness deteriorates. A Series may also suffer losses if
it is unable  to terminate outstanding  swap agreements or  reduce its  exposure
through offsetting transactions.
 
    Swaps,  caps,  floors and  collars are  highly specialized  activities which
involve certain risks.  See the SAI  for further information  on, and the  risks
involved in, these activities.
 
    OPTIONS ON SECURITIES: Each of the Emerging Growth Series, the Value Series,
the Total Return Series, the Bond Series, the Strategic Fixed Income Series, the
World  Governments Series,  the Growth  With Income  Series and  the High Income
Series may write (sell) covered put and  call options and purchase put and  call
options on securities. Each of these Series will write options on securities for
the  purpose  of  increasing its  return  and/or  to protect  the  value  of its
portfolio.  In  particular,  where  a  Series  writes  an  option  that  expires
unexercised  or is  closed out  by the Series  at a  profit, it  will retain the
premium paid for the option which will increase its gross income and will offset
in part the reduced  value of the portfolio  security underlying the option,  or
the increased cost of portfolio securities to be acquired. In contrast, however,
if the price of the underlying security moves adversely to the Series' position,
the  option may be exercised and the 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.  The 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.
 
    By writing a call option on a  security, a Series limits its opportunity  to
profit  from any increase in the market  value of the underlying security, since
the holder will usually exercise  the call option when  the market value of  the
underlying  security exceeds the exercise price of the call. However, the Series
retains the risk of depreciation in value of securities on which it has  written
call options.
 
    Each  of these 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 a Series wants to purchase at a later date. In the
event  that the expected  market fluctuations occur,  the 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 the  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
the Series.
 
                                       31
<PAGE>
    In certain instances,  the Strategic  Fixed Income Series  and the  Emerging
Growth  Series may  enter into options  on Treasury securities  that are "reset"
options or  "adjustable  strike" options.  These  options provide  for  periodic
adjustment  of the strike price and may also provide for the periodic adjustment
of the  premium during  the  term of  the option.  The  SAI contains  a  further
discussion of these investments.
 
    OPTIONS  ON STOCK  INDICES: Each  of the  Emerging Growth  Series, the Value
Series, the Total Return Series, the Growth With Income Series and the Utilities
Series may write (sell) covered call and  put options and purchase call and  put
options  on  stock indices.  Each of  these  Series may  write options  on stock
indices for  the purpose  of increasing  its  gross income  and to  protect  its
portfolio  against declines in the  value of securities it  owns or increases in
the value of  securities to be  acquired. When a  Series writes an  option on  a
stock  index,  and  the value  of  the  index moves  adversely  to  the holder's
position, the option will not be exercised, and the Series will either close out
the option at a profit or allow it to expire unexercised. A Series will  thereby
retain  the amount  of the premium,  less related transaction  costs, which will
increase its gross  income and  offset part of  the reduced  value of  portfolio
securities   or  the  increased   cost  of  securities   to  be  acquired.  Such
transactions, however, will constitute only partial hedges against adverse price
fluctuations, since any such fluctuations will  be offset only to the extent  of
the  premium received by  a Series for  the writing of  the option, less related
transaction costs.  In addition,  if  the value  of  an underlying  index  moves
adversely  to a Series'  option position, the  option may be  exercised, and the
Series will experience a loss which may  only be partially offset by the  amount
of the premium received.
 
    Each  of these Series may also purchase put or call options on stock indices
in order, respectively, to hedge its  investments against a decline in value  or
to attempt to reduce the risk of missing a market or industry segment advance. A
Series' possible loss in either case will be limited to the premium paid for the
option, plus related transaction costs.
 
    "YIELD  CURVE" OPTIONS: Each  of the Value Series,  the Total Return Series,
the Bond Series, the Strategic Fixed Income Series, the World Governments Series
and the High  Income Series may  enter into  options on the  yield "spread,"  or
yield  differential,  between two  securities, a  transaction  referred to  as a
"yield curve" option, for hedging and non-hedging (an effort to increase current
income) purposes. In contrast to other types of options, a yield curve option is
based on the difference between the yields of designated securities rather  than
the  actual prices  of the  individual securities,  and is  settled through cash
payments. Accordingly, a yield curve option is profitable to the holder if  this
differential  widens (in the case of a call)  or narrows (in the case of a put),
regardless of  whether  the yields  of  the underlying  securities  increase  or
decrease.  Yield curve options written by a  Series will be covered as described
in the SAI.  The trading  of yield  curve options is  subject to  all the  risks
associated  with  trading  other  types of  options,  as  discussed  below under
"Additional Risk Factors"  and in  the SAI.  In addition,  such options  present
risks  of loss  even if the  yield on  one of the  underlying securities remains
constant, if the  spread moves  in a  direction or to  an extent  which was  not
anticipated.
 
    FUTURES CONTRACTS AND OPTIONS ON FUTURES CONTRACTS: Each of the Total Return
Series,   the  Bond  Series,  the  Strategic  Fixed  Income  Series,  the  World
Governments Series, the Limited Maturity Series, the High Income Series and  the
Utilities  Series may purchase and sell futures contracts on foreign or domestic
fixed income securities or indices of such securities, including municipal  bond
indices  and any  other indices of  foreign or domestic  fixed income securities
that may  become available  for  trading ("Futures  Contracts"). Each  of  these
Series  may also purchase and write  options on such Futures Contracts ("Options
on Futures Contracts"). Each  of the Emerging Growth  Series, the Value  Series,
the  Total Return Series and the Growth With Income Series may purchase and sell
Futures Contracts on stock indices, while the Emerging Growth Series, the  Value
Series,  the Total Return  Series, the Strategic Fixed  Income Series, the World
Governments Series, the Growth With Income  Series and the Utilities Series  may
purchase  and sell Futures Contracts on foreign currencies or indices of foreign
currencies. Each of  these Series may  also purchase and  write Options on  such
Futures Contracts.
 
    Such  transactions  will  be  entered  into  for  hedging  purposes  or  for
non-hedging purposes to the extent permitted by applicable law. Each Series will
incur brokerage fees when it purchases and sells Futures Contracts, and will  be
required  to  maintain margin  deposits. In  addition, Futures  Contracts entail
risks.  Although   the   Adviser   believes   that   use   of   such   Contracts
 
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<PAGE>
will benefit a Series, if its investment judgment about the general direction of
exchange rates or the stock market is incorrect, the Series' overall performance
may  be poorer than if it had not  entered into any such contract and the Series
may realize  a loss.  A  Series will  not enter  into  any Futures  Contract  if
immediately  thereafter the value of securities and other obligations underlying
all such Futures Contracts held by such Series would exceed 50% of the value  of
its total assets.
 
    Purchases of Options on Futures Contracts may present less risk in hedging a
Series'  portfolio 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,  although it  may  be necessary  to  exercise the  option to
realize any profit, which  results in the establishment  of a futures  position.
The writing of Options on Futures Contracts, 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.  In addition,  if  an  option  is
exercised, a Series may suffer a loss on the transaction.
 
    Futures  Contracts and Options on Futures Contracts that are entered into by
a Series will be traded on U.S. and foreign exchanges.
 
    FORWARD CONTRACTS: Each Series (except the Limited Maturity Series and Money
Market Series) may enter  into forward foreign  currency exchange contracts  for
the  purchase or sale of a fixed quantity of a foreign currency at a future date
("Forward Contracts"). Each of these Series may enter into Forward Contracts for
hedging purposes and (except for the Bond Series and the High Income Series) for
non-hedging purposes (I.E., speculative purposes). By entering into transactions
in Forward Contracts for  hedging purposes, a Series  may be required to  forego
the  benefits of  advantageous changes  in exchange  rates and,  in the  case of
Forward Contracts entered into  for non-hedging purposes,  a Series may  sustain
losses  which will reduce its gross  income. Such transactions, therefore, could
be considered speculative. Forward Contracts are traded over-the-counter and not
on organized commodities or securities exchanges. As a result, Forward Contracts
operate in a  manner distinct  from exchange-traded instruments,  and their  use
involves  certain  risks beyond  those associated  with transactions  in Futures
Contracts or options traded on exchanges. A Series may choose to, or be required
to, receive delivery of the  foreign currencies underlying Forward Contracts  it
has  entered  into.  Under  certain circumstances,  such  as  where  the Adviser
believes that  the applicable  exchange  rate is  unfavorable  at the  time  the
currencies  are received or the Adviser  anticipates, for any other reason, that
the exchange  rate will  improve, the  Series may  hold such  currencies for  an
indefinite  period of time. A  Series may also enter  into a Forward Contract on
one currency to  hedge against  risk of loss  arising from  fluctuations in  the
value  of a second currency (referred to as a "cross hedge") if, in the judgment
of the  Adviser, a  reasonable degree  of correlation  can be  expected  between
movements  in  the  values of  the  two  currencies. Each  of  these  Series has
established procedures  consistent with  statements  of the  SEC and  its  staff
regarding the use of Forward Contracts by registered investment companies, which
requires use of segregated assets or "cover" in connection with the purchase and
sale of such contracts.
 
    OPTIONS ON FOREIGN CURRENCIES: Each of the Emerging Growth Series, the Value
Series,  the Total  Return Series, the  Bond Series, the  Strategic Fixed Income
Series, the World Governments  Series, the Growth With  Income Series, the  High
Income Series and the Utilities Series may purchase and write options on foreign
currencies  ("Options  on Foreign  Currencies")  for the  purpose  of protecting
against declines  in  the  dollar  value of  portfolio  securities  and  against
increases  in the dollar  cost of 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 a  Series  may  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 a Series' position, it may forfeit the entire amount of the premium paid  for
the  option plus related transaction  costs. A Series may  also choose to, or be
required to, receive delivery  of the foreign  currencies underlying Options  on
Foreign  Currencies it  has entered into.  Under certain  circumstances, such as
where the Adviser believes that the  applicable exchange rate is unfavorable  at
the  time the currencies are received or  the Adviser anticipates, for any other
reason, that the exchange rate will  improve, a Series may hold such  currencies
for an indefinite period of time.
 
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<PAGE>
6.  ADDITIONAL RISK FACTORS
 
    OPTIONS,  FUTURES CONTRACTS  AND FORWARD CONTRACTS:  Although certain Series
will enter into transactions in  options, Futures Contracts, Options on  Futures
Contracts,  Forward  Contracts and  Options  on Foreign  Currencies  for hedging
purposes, such transactions nevertheless involve  certain risks. For example,  a
lack  of  correlation between  the instrument  underlying  an option  or Futures
Contract and the  assets being  hedged, or unexpected  adverse price  movements,
could render a Series' hedging strategy unsuccessful and could result in losses.
Certain  Series also may enter into  transactions in options, Futures Contracts,
Options on  Futures  Contracts and  Forward  Contracts for  other  than  hedging
purposes,  which  involves greater  risk. In  particular, such  transactions may
result in losses for a Series which  are not offset by gains on other  portfolio
positions,  thereby reducing gross income. In addition, foreign currency markets
may be extremely volatile from time to time. There also can be no assurance that
a liquid secondary market will exist for  any contract purchased or sold, and  a
Series  may be  required to  maintain a  position until  exercise or expiration,
which could result in losses. The SAI  contains a description of the nature  and
trading  mechanics of options, Futures  Contracts, Options on Futures Contracts,
Forward Contracts and Options on  Foreign Currencies, and includes a  discussion
of the risks related to transactions therein.
 
    Transactions   in  Forward  Contracts  may  be  entered  into  only  in  the
over-the-counter market. Futures Contracts and Options on Futures Contracts  may
be  entered into  on U.S. exchanges  regulated by the  Commodity Futures Trading
Commission and on  foreign exchanges.  In addition, the  securities and  indexes
underlying options, Futures Contracts and Options on Futures Contracts traded by
the Series will include both domestic and foreign securities.
 
    LOWER RATED BONDS: Each of the Emerging Growth Series, the Value Series, the
Research  Series, the Total Return Series, the Bond Series, the Limited Maturity
Series, the  Strategic Fixed  Income  Series, the  High  Income Series  and  the
Utilities  Series may invest in fixed income  securities rated Baa by Moody's or
BBB by S&P or Fitch and  comparable unrated securities. These securities,  while
normally   exhibiting   adequate   protection   parameters,   have   speculative
characteristics and changes  in economic conditions  or other circumstances  are
more  likely  to lead  to a  weakened  capacity to  make principal  and interest
payments than in the case of higher grade securities.
 
    Each of these Series (except the Limited Maturity Series) may also invest in
securities rated Ba  or lower  by Moody's or  BB or  lower by S&P  or Fitch  and
comparable  unrated securities  (commonly known as  "junk bonds")  to the extent
described above. See Appendix  A to this Prospectus  for a description of  these
ratings.  These  securities  are  considered  speculative  and,  while generally
providing greater  income  than investments  in  higher rated  securities,  will
involve  greater  risk of  principal and  income  (including the  possibility of
default or bankruptcy of the issuers of such securities) and may involve greater
volatility of  price  (especially  during periods  of  economic  uncertainty  or
change)  than securities in the higher  rating categories. However, since yields
vary over time, no  specific level of  income can ever  be assured. These  lower
rated  high yielding fixed income securities  generally tend to reflect economic
changes and short-term corporate and  industry developments to a greater  extent
than  higher  rated  securities which  react  primarily to  fluctuations  in the
general level  of  interest  rates  (although these  lower  rated  fixed  income
securities  are  also  affected  by  changes  in  interest  rates,  the market's
perception of their credit quality, and the outlook for economic growth). In the
past, economic downturns or  an increase in interest  rates have, under  certain
circumstances,  caused a  higher incidence  of default  by the  issuers of these
securities and  may do  so  in the  future, especially  in  the case  of  highly
leveraged  issuers. During certain periods, the higher yields on a Series' lower
rated high yielding fixed  income securities are paid  primarily because of  the
increased risk of loss of principal and income, arising from such factors as the
heightened  possibility  of  default  or  bankruptcy  of  the  issuers  of  such
securities. Due to the fixed income  payments of these securities, a Series  may
continue  to earn the  same level of  interest income while  its net asset value
declines due  to portfolio  losses, which  could result  in an  increase in  the
Series'  yield despite the actual loss of  principal. The market for these lower
rated fixed income securities may be less liquid than the market for  investment
grade  fixed income securities, and judgment may at times play a greater role in
valuing  these  securities  than   in  the  case   of  investment  grade   fixed
 
                                       34
<PAGE>
income  securities.  Changes  in the  value  of securities  subsequent  to their
acquisition will not affect  cash income or  yield to maturity  to a Series  but
will  be reflected in the net  asset value of shares of  the Series. See the SAI
for more information on lower rated securities.
 
    FOREIGN  SECURITIES:   The   Limited   Maturity   Series   may   invest   in
dollar-denominated  foreign debt securities. The  Money Market Series may invest
in dollar-denominated securities  of foreign issuers  and in  dollar-denominated
securities  of foreign branches of U.S. banks such as negotiable certificates of
deposit (Eurodollars). The remaining Series may invest in dollar-denominated and
non-dollar-denominated foreign securities.  Investing in  securities of  foreign
issuers  generally involves  risks not  ordinarily associated  with investing in
securities of  domestic  issuers.  These  include  changes  in  currency  rates,
exchange   control  regulations,  governmental  administration  or  economic  or
monetary policy (in  the U.S. or  abroad) or circumstances  in dealings  between
nations.  Costs may be  incurred in connection  with conversions between various
currencies. Special  considerations may  also include  more limited  information
about  foreign issuers,  higher brokerage costs,  different accounting standards
and thinner trading markets. Foreign securities markets may also be less liquid,
more volatile and  less subject  to government  supervision than  in the  United
States.  Investments in  foreign countries  could be  affected by  other factors
including expropriation,  confiscatory taxation  and potential  difficulties  in
enforcing  contractual obligations and  could be subject  to extended settlement
periods. All of  the Series (except  the Limited Maturity  Series and the  Money
Market Series) may hold foreign currency received in connection with investments
in  foreign  securities  when, in  the  judgment  of the  Adviser,  it  would be
beneficial to convert such currency into U.S. dollars at a later date, based  on
anticipated  changes in  the relevant exchange  rate. Such Series  may also hold
foreign currency in anticipation of  purchasing foreign securities. See the  SAI
for  further  discussion  of  foreign  securities  and  the  holding  of foreign
currency, as well as the associated risks.
 
    AMERICAN DEPOSITARY  RECEIPTS:  Each  of  the  Series  (except  the  Limited
Maturity  Series  and the  Money Market  Series)  may invest  in ADRs  which are
certificates issued  by a  U.S.  depository (usually  a  bank) and  represent  a
specified  quantity of shares of an underlying  non-U.S. stock on deposit with a
custodian bank as collateral. Because  ADRs trade on U.S. securities  exchanges,
the Adviser does not treat them as foreign securities. However, they are subject
to many of the risks of foreign securities such as changes in exchange rates and
more limited information about foreign issuers.
 
    EMERGING  MARKET SECURITIES:  Each of  the Series  (except the  Money Market
Series) may invest  in emerging  markets. In addition  to the  general risks  of
investing in foreign securities, investments in emerging markets involve special
risks.  Securities of many  issuers in emerging  markets may be  less liquid and
more volatile than securities of  comparable domestic issuers. These  securities
may  be considered speculative  and, while generally  offering higher income and
the potential for capital appreciation, may present significantly greater  risk.
Emerging  markets may have different clearance and settlement procedures, and in
certain markets there have been times when settlements have been unable to  keep
pace  with the volume of securities transactions, making it difficult to conduct
such transactions. Delays in settlement could result in temporary periods when a
portion of the assets of a Series is uninvested and no return is earned thereon.
The inability of a Series to make intended security purchases due to  settlement
problems  could  cause a  Series  to miss  attractive  investment opportunities.
Inability to dispose of  portfolio securities due  to settlement problems  could
result  in  losses  to a  Series  due to  subsequent  declines in  value  of the
portfolio securities,  a  decrease  in  the level  of  liquidity  in  a  Series'
portfolio,  or if  a Series has  entered into  a contract to  sell the security,
possible liability to  the purchaser.  Certain markets may  require payment  for
securities before delivery, and in such markets a Series bears the risk that the
securities  will not  be delivered  and that  the Series'  payments will  not be
returned. Securities  prices  in  emerging markets  can  be  significantly  more
volatile than in the more developed nations of the world, reflecting the greater
uncertainties  of  investing  in  less  established  markets  and  economies. In
particular,  countries  with  emerging  markets  may  have  relatively  unstable
governments,  present the risk of nationalization of businesses, restrictions on
foreign ownership, or prohibitions of repatriation of assets, and may have  less
protection  of property rights  than more developed  countries. The economies of
countries with  emerging  markets may  be  predominantly  based on  only  a  few
industries,  may  be  highly vulnerable  to  changes  in local  or  global trade
conditions, and may suffer from extreme  and volatile debt burdens or  inflation
rates.  Local securities markets may trade a  small number of securities and may
 
                                       35
<PAGE>
be unable to  respond effectively  to increases in  trading volume,  potentially
making  prompt liquidation  of substantial  holdings difficult  or impossible at
times. Securities of issuers located in countries with emerging markets may have
limited marketability and may be subject to more abrupt or erratic movements.
 
    Certain  emerging  markets  may   require  governmental  approval  for   the
repatriation  of  investment  income,  capital  or  the  proceeds  of  sales  of
securities by foreign investors.  In addition, if a  deterioration occurs in  an
emerging  market's balance  of payments  or for  other reasons,  a country could
impose temporary restrictions on foreign capital remittances. A Series could  be
adversely   affected  by  delays  in,  or  a  refusal  to  grant,  any  required
governmental approval for repatriation of capital, as well as by the application
to the Series of any restrictions on investments.
 
    Investment in  certain  foreign  emerging market  debt  obligations  may  be
restricted  or controlled to varying degrees. These restrictions or controls may
at times preclude investment in certain foreign emerging market debt obligations
and increase the expenses of a Series.
 
    NON-DIVERSIFICATION: Each  of the  World Governments  Series, the  Strategic
Fixed  Income Series and the Utilities Series is "non-diversified," as that term
is defined in the Investment Company Act of 1940 ( the "1940 Act"), but  intends
to  qualify as a  "regulated investment company" ("RIC")  for federal income tax
purposes. This means,  in general,  that although more  than 5%  of the  Series'
total  assets  may be  invested in  the  securities of  one issuer  (including a
foreign government),  at the  close of  each  quarter of  its taxable  year  the
aggregate  amount of such holdings may not exceed  50% of the value of its total
assets, and no more than 25% of the value of its total assets may be invested in
the securities of a single issuer.  To the extent that a non-diversified  Series
at  times may hold the securities of a smaller number of issuers than if it were
"diversified" (as defined in  the 1940 Act),  the Series will  at such times  be
subject  to greater risk  with respect to  its portfolio securities  than a fund
that invests in a broader range of securities, because changes in the  financial
condition or market assessment of a single issuer may cause greater fluctuations
in the Series' total return and the net asset value of its shares.
                              -------------------
 
SHORT-TERM  INVESTMENTS FOR  TEMPORARY DEFENSIVE  PURPOSES --  During periods of
unusual market conditions when the Adviser believes that investing for temporary
defensive purposes is appropriate,  or in order  to meet anticipated  redemption
requests, a large portion or all of the assets of each Series may be invested in
cash (including foreign currency) or cash equivalents including, but not limited
to,   obligations  of   banks  (including  certificates   of  deposit,  bankers'
acceptances,  time  deposits  and  repurchase  agreements),  commercial   paper,
short-term notes, U.S. Government Securities and related repurchase agreements.
 
PORTFOLIO TRADING
 
    Each   Series  intends  to  manage  its  portfolio  by  buying  and  selling
securities, as  well as  holding  securities to  maturity,  to help  attain  its
investment objectives and policies.
 
    Each  Series will engage in portfolio  trading if it believes a transaction,
net  of  costs  (including  custodian  charges),  will  help  in  attaining  its
investment  objectives. In trading portfolio securities,  a Series seeks to take
advantage of  market  developments,  yield disparities  and  variations  in  the
creditworthiness  of issuers. For  a description of the  strategies which may be
used by the Series in trading portfolio securities, see "Portfolio  Transactions
and  Brokerage Commissions" in the SAI.  The Total Return Series' portfolio will
be managed actively with respect to the Series' fixed income securities and  the
asset  allocations modified as the Adviser  deems necessary. Although the Series
does not  intend to  seek short-term  profits, fixed  income securities  in  its
portfolio  will be sold whenever the Adviser believes it is appropriate to do so
without regard to the length  of time the particular  asset may have been  held.
With  respect to its equity securities, the  Total Return Series does not intend
to trade in  securities for  short-term profits and  anticipates that  portfolio
securities  ordinarily will be held for one  year or longer. However, the Series
will effect trades whenever it believes that changes in its portfolio securities
are appropriate.
 
                                       36
<PAGE>
   
    Because each of  the Utilities  Series, the  High Income  Series, the  World
Governments  Series, the Bond Series and the Limited Maturity Series is expected
to have a portfolio  turnover rate of over  100%, transaction costs incurred  by
the  Series  and the  realized capital  gains and  losses of  the Series  may be
greater than that of a fund with a lesser portfolio turnover rate.
    
 
    The primary consideration  in placing portfolio  security transactions  with
broker-dealers  for execution  is to obtain,  and maintain  the availability of,
execution at  the  most  favorable  prices and  in  the  most  effective  manner
possible. Consistent with the foregoing primary consideration, the Rules of Fair
Practice  of the National  Association of Securities  Dealers, Inc. (the "NASD")
and such other policies as the Trustees of the Trust may determine, the  Adviser
may  consider sales of  Contracts for which  the Trust is  an investment option,
together with sales of  shares of other investment  company clients of MFS  Fund
Distributors, Inc., the distributor of shares of the Trust and of the MFS Family
of Funds, as a factor in the selection of broker-dealers to execute each Series'
portfolio  transactions.  From  time  to time  the  Adviser  may  direct certain
portfolio transactions to broker-dealer firms which, in turn, have agreed to pay
a portion of the Series' operating expenses (e.g., fees charged by the custodian
of the Series' assets). For a  further discussion of portfolio trading, see  the
SAI.
                              -------------------
 
    The  SAI includes a  discussion of other investment  policies and listing of
specific investment restrictions  which govern the  investment policies of  each
Series.  The specific investment  restrictions listed in the  SAI may be changed
without shareholder  approval  unless indicated  otherwise  (see the  SAI).  The
Series'  investment limitations, policies and rating standards are adhered to at
the  time  of  purchase  or  utilization  of  assets;  a  subsequent  change  in
circumstances will not be considered to result in a violation of policy.
 
7.  MANAGEMENT OF THE SERIES
 
    The   Trust's  Board  of  Trustees,  as   part  of  its  overall  management
responsibility, oversees  various  organizations responsible  for  each  Series'
day-to-day management.
 
   
INVESTMENT ADVISER -- MFS manages each Series pursuant to an Investment Advisory
Agreement  with the  Trust on behalf  of each  Series dated April  14, 1994 (the
"Advisory Agreement"). Under  the Advisory  Agreement, MFS  provides the  Series
with  overall  investment advisory  services. Subject  to  such policies  as the
Trustees may determine, MFS makes investment decisions for each Series. For  its
services  and  facilities,  MFS receives  a  management fee,  computed  and paid
monthly, in an amount equal to the  following annual rates of the average  daily
net assets of each Series:
    
 
<TABLE>
<CAPTION>
                                                                                                 PERCENTAGE OF THE
                                                                                                 AVERAGE DAILY NET
                                                                                                       ASSETS
SERIES                                                                                             OF EACH SERIES
- ---------------------------------------------------------------------------------------------  ----------------------
<S>                                                                                            <C>
Emerging Growth Series.......................................................................             0.75%
Value Series.................................................................................             0.75%
Research Series..............................................................................             0.75%
Growth With Income Series....................................................................             0.75%
Total Return Series..........................................................................             0.75%
Utilities Series.............................................................................             0.75%
High Income Series...........................................................................             0.75%
World Governments Series.....................................................................             0.75%
Strategic Fixed Income Series................................................................             0.75%
Bond Series..................................................................................             0.60%
Limited Maturity Series......................................................................             0.55%
Money Market Series..........................................................................             0.50%
</TABLE>
 
                                       37
<PAGE>
    For  the fiscal  year ended  December 31,  1995, MFS  received the following
management fees from  the Series under  the Advisory Agreement  and assumed  the
following amounts of the Series' expenses (see "Expenses" below);
 
   
<TABLE>
<CAPTION>
                                                                                    MANAGEMENT FEE  EXPENSES ASSUMED
SERIES                                                                               PAID TO MFS         BY MFS
- ----------------------------------------------------------------------------------  --------------  ----------------
<S>                                                                                 <C>             <C>
Emerging Growth Series............................................................    $  314,262       $   62,962
Value Series......................................................................         3,196           12,079
Research Series...................................................................        92,348           56,859
Growth With Income Series.........................................................        30,792           42,658
Total Return Series...............................................................        60,979           87,721
Utilities Series..................................................................        39,863           91,877
High Income Series................................................................        56,169           45,293
World Governments Series..........................................................       126,898          172,556
Bond Series.......................................................................         2,924           40,829
Limited Maturity Series...........................................................         1,064           12,705
Money Market Series...............................................................           858           46,831
</TABLE>
    
 
    The identity and background of the portfolio managers for each Series is set
forth  below. Unless  indicated otherwise, each  portfolio manager  has acted in
that capacity since the commencement of investment operations of each Series.
 
   
<TABLE>
<CAPTION>
SERIES                                                           PORTFOLIO MANAGERS
- -----------------------------  --------------------------------------------------------------------------------------
<S>                            <C>
Emerging Growth Series         John W. Ballen, a Senior Vice President of MFS, has been employed by the Adviser as  a
                               portfolio  manager since  1984. Toni  Y. Shimura,  a Vice  President of  MFS, has been
                               employed by  the Adviser  as a  portfolio manager  since 1987.  Ms. Shimura  became  a
                               portfolio manager of the Series on November 30, 1995.
Value Series                   John F. Brennan, Jr., a Senior Vice President of MFS, has been employed by the Adviser
                               as a portfolio manager since 1985.
Research Series                The  Series is currently managed  by a committee comprised  of various equity research
                               analysts employed by the Adviser.
Growth With Income Series      Kevin R. Parke, a Senior Vice President of MFS, has been employed by the Adviser as  a
                               portfolio  manager since 1985. John D. Laupheimer, a Senior Vice President of MFS, has
                               been employed by the Adviser as a portfolio manager since 1981.
Total Return Series            David M. Calabro,  a Vice  President of MFS,  has been  employed by the  Adviser as  a
                               portfolio  manager since 1992.  Mr. Calabro is  the head of  this portfolio management
                               team and a manager of the common  stock portion of the Series' portfolio. Geoffrey  L.
                               Kurinsky,  a Senior  Vice President  of MFS,  has been  employed by  the Adviser  as a
                               portfolio manager since 1987. Mr. Kurinsky is the manager of the Series' fixed  income
                               securities.  Judith N. Lamb, a Vice President of MFS, has been employed by the Adviser
                               as a portfolio manager since 1992. Ms. Lamb is the manager of the Series'  convertible
                               securities.  Lisa B. Nurme, a Vice President of  MFS, has been employed by the Adviser
                               as a portfolio manager since 1987. Ms. Nurme is a manager of the common stock  portion
                               of  the Series'  portfolio. Maura A.  Shaughnessy, a  Vice President of  MFS, has been
                               employed by  the Adviser  as a  portfolio manager  since 1991.  Ms. Shaughnessy  is  a
                               manager of the common stock portion of the Series' portfolio. Each individual became a
                               portfolio manager of the Series on July 19, 1995.
Utilities Series               Maura  A.  Shaughnessy, a  Vice President  of the  Adviser, has  been employed  by the
                               Adviser as a portfolio manager since 1991.
</TABLE>
    
 
                                       38
<PAGE>
<TABLE>
<CAPTION>
SERIES                                                           PORTFOLIO MANAGERS
- -----------------------------  --------------------------------------------------------------------------------------
High Income Series             Joan S. Batchelder, a Senior Vice President  of the Adviser, has been employed by  the
                               Adviser as a portfolio manager since 1984.
<S>                            <C>
World Governments Series       Stephen  C. Bryant, a Senior  Vice President of the Adviser,  has been employed by the
                               Adviser as a portfolio manager since 1987.
Strategic Fixed Income Series  James Swanson,  a Senior  Vice President  of the  Adviser, has  been employed  by  the
                               Adviser as a portfolio manager since 1985.
Bond Series                    Geoffrey L. Kurinsky, a Senior Vice President of the Adviser, has been employed by the
Limited Maturity Series        Adviser as a portfolio manager since 1987.
Money Market Series
</TABLE>
 
   
    MFS  also serves as investment adviser to each of the other funds in the MFS
Family of Funds  (the "MFS  Funds") and to  MFS-Registered Trademark-  Municipal
Income Trust, MFS Multimarket Income Trust, MFS Government Markets Income Trust,
MFS  Intermediate  Income Trust,  MFS Charter  Income  Trust, MFS  Special Value
Trust, MFS Institutional Trust, MFS Union  Standard Trust, MFS/ Sun Life  Series
Trust,  and seven  variable accounts, each  of which is  a registered investment
company established by Sun Life Assurance Company of Canada (U.S.) ("Sun Life of
Canada (U.S.)") in connection  with the sale  of various fixed/variable  annuity
contracts.  MFS and  its wholly  owned subsidiary,  MFS Asset  Management, Inc.,
provide investment advice to substantial private clients.
    
 
   
    MFS is America's oldest  mutual fund organization.  MFS and its  predecessor
organizations  have  a history  of  money management  dating  from 1924  and the
founding of the first mutual fund in the United States, Massachusetts  Investors
Trust.   Net  assets  under   the  management  of   the  MFS  organization  were
approximately $52.8  billion on  behalf of  approximately 2.3  million  investor
accounts  as of February 28, 1997. As of such date, the MFS organization managed
approximately  $28.9  billion  of  assets  invested  in  equity  securities  and
approximately  $19.4  billion of  assets  invested in  fixed  income securities.
Approximately $4.0  billion  of  the  assets managed  by  MFS  are  invested  in
securities of foreign issuers and non-U.S. dollar-denominated securities of U.S.
issuers.  MFS is a subsidiary of  Sun Life of Canada (U.S.),  which in turn is a
wholly owned subsidiary of  Sun Life Assurance Company  of Canada ("Sun  Life").
The  Directors of MFS are A. Keith  Brodkin, Jeffrey L. Shames, Arnold D. Scott,
John D. McNeil and Donald A. Stewart. Mr. Brodkin is the Chairman, Mr. Shames is
the President  and  Mr. Scott  is  the Secretary  and  a Senior  Executive  Vice
President  of MFS.  Messrs. McNeil and  Stewart are the  Chairman and President,
respectively, of Sun Life. Sun Life, a mutual life insurance company, is one  of
the largest international life insurance companies and has been operating in the
United  States since 1895, establishing a  headquarters office here in 1973. The
executive officers of MFS report to the Chairman of Sun Life.
    
 
    A. Keith Brodkin, the Chairman  and a Director of  MFS, is the Chairman  and
President  and a Trustee of the Trust. W. Thomas London, Stephen E. Cavan, James
R. Bordewick, Jr.,  and James  O. Yost,  all of whom  are officers  of MFS,  are
officers of the Trust.
 
   
    MFS  has established a strategic alliance with Foreign & Colonial Management
Ltd. ("Foreign & Colonial"). Foreign  & Colonial is a  subsidiary of two of  the
world's  oldest  financial  services institutions,  the  London-based  Foreign &
Colonial Investment Trust PLC, which pioneered the idea of investment management
in 1868, and HYPO-BANK (Bayerische Hypotheken-und Weschsel-Bank AG), the  oldest
publicly  listed bank in Germany, founded in 1835. As part of this alliance, the
portfolio managers and investment analysts of  MFS and Foreign & Colonial  share
their  views on  a variety  of investment related  issues, such  as the economy,
securities  markets,  portfolio   securities  and   their  issuers,   investment
recommendations,  strategies and  techniques, risk  analysis, trading strategies
and other  portfolio  management  matters.  MFS  has  access  to  the  extensive
international  equity investment expertise of Foreign  & Colonial, and Foreign &
Colonial has access to  the extensive U.S. equity  investment expertise of  MFS.
MFS  and Foreign Colonial each have investment personnel working in each other's
offices in Boston and London, respectively.
    
 
                                       39
<PAGE>
    In  certain  instances there  may  be securities  which  are suitable  for a
Series' portfolio as well as for portfolios  of other clients of MFS or  clients
of  Foreign  &  Colonial.  Some simultaneous  transactions  are  inevitable when
several clients  receive investment  advice  from MFS  and Foreign  &  Colonial,
particularly  when the same security is suitable for more than one client. While
in some cases this arrangement could have  a detrimental effect on the price  or
availability  of the security as  far as a Series  is concerned, in other cases,
however, it may produce increased investment opportunities for the Series.
 
    From time to time, the Adviser  may purchase, redeem and exchange shares  of
any  Series. The  purchase by  the Adviser of  shares of  a Series  may have the
effect of  lowering that  Series' expense  ratio, while  the redemption  by  the
Adviser  of shares of  a Series may  have the effect  of increasing that Series'
expense ratio.
 
    DISTRIBUTOR  --  MFS  Fund  Distributors,  Inc.  ("MFD"),  a  wholly   owned
subsidiary  of MFS, is the distributor of  shares of each Series and also serves
as distributor for certain of the other mutual funds managed by MFS.
 
   
    ADMINISTRATOR  --  MFS  provides  the  Series  with  certain  administrative
services  pursuant to a Master Administrative  Services Agreement dated March 1,
1997. Under  this Agreement,  MFS provides  the Series  with certain  financial,
legal, compliance, shareholder communications and other administrative services.
As  a partial reimbursement for the cost of providing these services, the Series
pays MFS an administrative  fee up to  0.015% per annum  of the Series'  average
daily  net assets,  provided that  the administrative fee  is not  assessed on a
Series' assets that exceed $3 billion.
    
 
    SHAREHOLDER SERVICING AGENT  -- MFS Service  Center, Inc. (the  "Shareholder
Servicing  Agent"), a wholly owned subsidiary  of MFS, performs transfer agency,
certain dividend disbursing agency and other services for each Series.
 
8.  INFORMATION CONCERNING SHARES OF EACH SERIES
 
PURCHASES AND REDEMPTIONS
 
    The separate accounts of the Participating Insurance Companies place  orders
to  purchase and redeem shares of each  Series based on, among other things, the
amount of premium payments to be invested and surrender and transfer requests to
be effected on that day pursuant to Contracts. Orders received by the Trust  are
effected  on days on which the Exchange is open for trading. For orders received
by the Trust before  the close of  regular trading on  the Exchange (normally  4
p.m.  eastern time), such purchases and redemptions of the shares of each Series
are effected at the respective net asset  values per share determined as of  the
close  of  regular  trading on  the  Exchange  on that  same  day. Participating
Insurance Companies shall be the designee  of the Trust for receipt of  purchase
and  redemption orders from Contract holders  and receipt by such designee shall
constitute receipt by the Trust; provided that the Trust receives notice of such
order by 9:30 a.m. eastern time on the next following day on which the  Exchange
is open for trading. Payment for shares shall be by federal funds transmitted by
wire and must be received by 2:00 p.m. eastern time on the next following day on
which  the Exchange is  open for trading  after the purchase  order is received.
Redemption proceeds shall be by federal  funds transmitted by wire and shall  be
sent  by 2:00 p.m. eastern time on the  next following day on which the Exchange
is open for trading after  the redemption order is  received. No fee is  charged
the shareholders when they redeem Series shares.
 
    The  offering of shares of any Series may  be suspended for a period of time
and each  Series reserves  the  right to  refuse  any specific  purchase  order.
Purchase  orders may be refused if, in the Adviser's opinion, they are of a size
that would disrupt the management of a  Series. The Trust may suspend the  right
of  redemption of shares of any Series  and may postpone payment for any period:
(i) during which the Exchange is closed other than customary weekend and holiday
closings or during which  trading on the Exchange  is restricted; (ii) when  the
SEC  determines  that a  state of  emergency  exists which  may make  payment or
transfer not reasonably practicable;  (iii) as the SEC  may by order permit  for
the  protection of the security  holders of the Trust; or  (iv) at any time when
the Trust may, under applicable laws, rules and regulations, suspend payment  on
the redemption of its shares.
 
                                       40
<PAGE>
    Should  any conflict between Contract holders arise which would require that
a substantial  amount  of net  assets  be  withdrawn from  any  Series,  orderly
portfolio  management  could be  disrupted to  the  potential detriment  of such
Contract.
 
NET ASSET VALUE
 
    The net asset value per share of  each Series is determined each day  during
which  the Exchange is open for trading.  This determination is made once during
each such day as of  the close of regular trading  on the Exchange by  deducting
the  amount of the Series' liabilities from  the value of the Series' assets and
dividing the  difference by  the number  of shares  of the  Series  outstanding.
Values  of assets in  a Series' portfolio  are determined on  the basis of their
market or other fair value (amortized cost value in the case of the Money Market
Series), as described in  the SAI. All investments,  assets and liabilities  are
expressed in U.S. dollars based upon current currency exchange rates.
 
DISTRIBUTIONS
 
    Substantially  all of  each Series'  (except the  Money Market  Series') net
investment income for any calendar year is declared as dividends and paid to its
shareholders as dividends on an annual basis. In addition, each Series may  make
one  or more distributions during the calendar year to its shareholders from any
long-term capital gains,  and may  also make one  or more  distributions to  its
shareholders  from short-term capital  gains. In determining  the net investment
income available  for distribution,  a Series  may rely  on projections  of  its
anticipated  net investment income  (which may include  short-term capital gains
from the sales  of securities  or other  assets, and,  if allowed  by a  Series'
investment  restrictions, premiums  from options  written), over  a longer term,
rather than its actual net investment income for the period.
 
    Substantially all of the Money Market Series' net investment income for  any
calendar  year is declared  as dividends daily  and paid to  its shareholders as
dividends on a monthly basis. Generally, those dividends are distributed on  the
last  business day of  the month in the  form of additional  shares of the Money
Market Series at the rate  of one share (and  fraction thereof) for each  dollar
(and   fraction  thereof)  of  dividend  income  or,  at  the  election  of  the
shareholder, in cash. Shares purchased become entitled to dividends declared  as
of the first day following the date of investment.
 
    Shareholders of any of the Series may elect to receive dividends and capital
gain distributions in either cash or additional shares.
 
TAX STATUS
 
   
    Each  Series of the Trust is treated as a separate entity for federal income
tax purposes. In  order to  minimize the taxes  each Series  would otherwise  be
required  to  pay, each  Series intends  to  qualify each  year as  a "regulated
investment company" under Subchapter M of the Internal Revenue Code of 1986,  as
amended  ("the Code"). Because each Series intends  to distribute all of its net
investment income and net capital gains  to its shareholders in accordance  with
the  timing requirements imposed by the Code, it is not expected that any of the
Series will be required to pay entity level federal income or excise taxes.
    
 
    Shares of  the  Series  are  offered only  to  the  Participating  Insurance
Companies'  separate accounts that  fund Contracts. See  the applicable Contract
prospectus for  a discussion  of the  federal income  tax treatment  of (1)  the
separate  accounts that purchase and  hold Series shares and  (2) the holders of
the Contracts  that  are funded  through  those  accounts. In  addition  to  the
diversification  requirements  of Subchapter  M of  the  Code, each  Series also
intends to diversify its assets as  required by Code Section 817(h)(1), and  the
regulations thereunder. See also "Tax Status" in the SAI.
 
DESCRIPTION OF SHARES, VOTING RIGHTS AND LIABILITIES
 
    Each Series currently has one class of shares, entitled Shares of Beneficial
Interest  (without par value).  The Trust has  reserved the right  to create and
issue additional  classes and  series of  shares, in  which case  each class  of
shares  of a  series would  participate equally  in the  earnings, dividends and
assets attributable to that  class of that  particular series. Shareholders  are
entitled to one vote for each share held, and shares of each Series are entitled
to  vote  separately to  approve investment  advisory  agreements or  changes in
investment restrictions with respect  to that Series, but  shares of all  Series
vote  together  in  the  election  of  Trustees  and  selection  of accountants.
Additionally, each  Series  will  vote  separately  on  any  other  matter  that
 
                                       41
<PAGE>
affects  solely that  Series, but  will otherwise  vote together  with all other
Series on  all  other  matters.  The  Trust  does  not  intend  to  hold  annual
shareholder  meetings. The Declaration  of Trust provides that  a Trustee may be
removed from office  in certain  instances. See "Description  of Shares,  Voting
Rights and Liabilities" in the SAI.
 
    Each  share of  a Series represents  an equal proportionate  interest in the
Series with each  share, subject to  the liabilities of  the particular  Series.
Shares  have  no pre-emptive  or conversion  rights. Shares  are fully  paid and
non-assessable. Should  a Series  be liquidated,  shareholders are  entitled  to
share  PRO RATA  in the net  assets available for  distribution to shareholders.
Shares  will  remain  on  deposit  with  the  Shareholder  Servicing  Agent  and
certificates will not be issued.
 
    The  Trust  is an  entity of  the  type commonly  known as  a "Massachusetts
business trust."  Under Massachusetts  law, shareholders  of such  a trust  may,
under  certain  circumstances, be  held personally  liable  as partners  for its
obligations. However,  the risk  of a  shareholder incurring  financial loss  on
account  of  shareholder liability  is limited  to  circumstances in  which both
inadequate insurance existed (E.G., fidelity bonding and omission insurance) and
the Trust itself was unable to meet its obligations.
 
   
    MFS Fund Distributors, Inc.,  Boston, MA, owns 80.53%  of the Value  Series'
shares  and  98.31%  of the  Limited  Maturity Series'  shares,  and, therefore,
controls such Series; United  of Omaha Life Insurance  Company, Omaha, NE,  owns
50.75%  of the Research Series' shares, 75.63% of the High Income Series' shares
and 33.02% of  the World  Governments Series' shares,  and, therefore,  controls
such  Series; Union  Central Life  Insurance Company--  Group Annuity  and Union
Central Life Insurance Company--Individual  Annuity, Cincinnati, OH, own  28.17%
and  52.03%,  respectively,  of  the Growth  With  Income  Series'  shares, and,
therefore, each controls the Series;  CG Variable Annuity--Separate Account  II,
Hartford, CT, owns 44.85% of the Total Return Series and 29.08% of the Utilities
Series'  shares, and, therefore,  controls such Series;  Ameritas Life Insurance
Company-- Separate  Account VA-2  (Annuity),  Lincoln, NE,  owns 56.16%  of  the
Utilities  Series' shares, and, therefore, controls  the Series; Century Life of
America--Century Variable Annuity Account, Waverly, IA, owns 45.82% of the World
Governments Series' shares, and,  therefore, controls the Series;  Massachusetts
Financial  Services  Company, Boston,  MA, owns  98.84%  of the  Strategic Fixed
Income Series' shares,  and, therefore,  controls the Series;  Kansas City  Life
Insurance  Company--Variable Annuity, Kansas  City, MO, owns  70.43% of the Bond
Series' shares, and,  therefore, controls  the Series; and  First Citicorp  Life
Insurance  Company, Dover, DE,  owns 81.98% of the  Money Market Series' shares,
and, therefore, controls the Series.
    
 
PERFORMANCE INFORMATION
 
   
    Each Series' performance may be quoted in advertising in terms of yield and,
except for  the Money  Market  Series, total  return.  Performance is  based  on
historical   results  and  is  not  intended  to  indicate  future  performance.
Performance quoted for a  Series includes the effect  of deducting that  Series'
expenses,  but  may  not  include  charges  and  expenses  attributable  to  any
particular insurance  product.  Excluding these  charges  from quotations  of  a
Series'  performance  has  the  effect  of  increasing  the  performance quoted.
Performance for a  Series will  vary based on,  among other  things, changes  in
market  conditions, the  level of  interest rates and  the level  of the Series'
expenses. For further information about  the Series' performance for the  fiscal
year  ended December 31, 1996, please see  the Series' Annual Reports. A copy of
these  Annual  Reports  may  be  obtained  without  charge  by  contacting   the
Shareholder Servicing Agent (see back cover for address and phone number).
    
 
    MONEY  MARKET  SERIES: From  time to  time, quotations  of the  Money Market
Series' "yield" and "effective yield"  may be included in advertisements,  sales
literature or reports to shareholders or prospective investors. The yield of the
Money  Market Series refers to the net investment income generated by the Series
over a specified  seven-day period (the  ending date of  which will be  stated).
Included  in "net  investment income" is  the amortization of  market premium or
accretion  of  market  and  original   issue  discount.  This  income  is   then
"annualized."  That is, the amount of income generated by the Series during that
week is assumed to be  generated during each week over  a 365 day period and  is
shown  as a  percentage. The  effective yield  is expressed  similarly but, when
annualized, the income earned by  an investment in the  Series is assumed to  be
reinvested.  The effective yield will be  slightly higher than the yield because
of the compounding effect of this assumed reinvestment.
 
                                       42
<PAGE>
    OTHER SERIES: From time  to time, quotations of  a Series' total return  and
yield  may  be  included  in  advertisements,  sales  literature  or  reports to
shareholders or prospective investors.  The total return of  a Series refers  to
return  assuming an investment has been held in  the Series for one year and for
the life of  the Series (the  ending date of  which will be  stated). The  total
return  quotations may  be expressed  in terms  of average  annual or cumulative
rates of return for  all periods quoted. Average  annual total return refers  to
the  average  annual compound  rate  of return  of  an investment  in  a Series.
Cumulative total  return  represents  the  cumulative  change  in  value  of  an
investment  in a Series. Both  will assume that all  dividends and capital gains
distributions were reinvested. The  yield of a Series  refers to net  investment
income generated by a Series over a specified 30-day (or one month) period. This
income  is then  "annualized." That  is, the amount  of income  generated by the
Series during that 30-day (or one month) period is assumed to be generated  over
a 12-month period and is shown as a percentage of net asset value.
 
EXPENSES
 
   
    The  Trust pays the compensation of the Trustees who are not officers of MFS
and all expenses of each Series (other than those assumed by MFS) including  but
not  limited to: governmental fees; interest  charges; taxes; membership dues in
the Investment Company Institute allocable to each Series; fees and expenses  of
independent  auditors, of legal counsel, and of any transfer agent, registrar or
dividend disbursing agent of each Series; expenses of repurchasing and redeeming
shares and servicing shareholder accounts;  expenses of preparing, printing  and
mailing   prospectuses,  periodic  reports,  notices  and  proxy  statements  to
shareholders and to governmental officers  and commissions; brokerage and  other
expenses  connected with  the execution,  recording and  settlement of portfolio
security transactions; insurance premiums; fees and expenses of Investors Bank &
Trust Company, the Trust's Custodian, for all services to each Series, including
safekeeping of funds and securities and maintaining required books and accounts;
expenses of  calculating the  net asset  value  of shares  of each  Series;  and
expenses   of  shareholder   meetings.  Expenses   relating  to   the  issuance,
registration and qualification  of shares  of each Series  and the  preparation,
printing  and mailing of prospectuses  are borne by each  Series except that the
Distribution Agreement with MFD requires MFD to pay for prospectuses that are to
be used for sales purposes. Expenses of the Trust which are not attributable  to
a  specific Series  are allocated  between the  Series in  a manner  believed by
management of the Trust to be fair and equitable.
    
 
   
    Subject to termination or  revision at the sole  discretion of MFS, MFS  has
agreed  to bear expenses of each of  the Series such that the respective Series'
"Other Expenses," which are defined to include all expenses of the Series except
for management fees,  do not  exceed the  following percentages  of the  average
daily  net assets of the  Series (the "Maximum Percentage"):  0.40% for the Bond
Series, 0.45%  for the  Limited  Maturity Series,  0.10%  for the  Money  Market
Series, and 0.25% for each remaining Series. The obligation of MFS to bear these
expenses  for a Series terminates on the last  day of the Series' fiscal year in
which its "Other Expenses" are less than or equal to the Maximum Percentage. The
payments made by MFS on behalf of each Series under this arrangement are subject
to reimbursement by the Series to MFS, which will be accomplished by the payment
of an expense reimbursement fee by the  Series to MFS computed and paid  monthly
at  a percentage of  the Series' average  daily net assets  for its then current
fiscal year, with a limitation that  immediately after such payment the  Series'
"Other   Expenses"  will  not  exceed   the  Maximum  Percentage.  This  expense
reimbursement by each Series  to MFS terminates  on the earlier  of the date  on
which  payments made by the Series equal  the prior payment of such reimbursable
expenses by MFS or December 31, 2004.
    
 
SHAREHOLDER COMMUNICATIONS
 
    Owners of Contracts  issued by Participating  Insurance Companies for  which
shares  of one or more  Series are the investment  vehicle will receive from the
Participating Insurance Companies semi-annual  financial statements and  audited
year-end  financial statements  certified by  the Trust's  independent certified
public accountants. Each report will show the investments owned by the Trust and
the valuations thereof  as determined  by the  Trustees and  will provide  other
information about the Trust and its operations.
 
                                       43
<PAGE>
    Participating  Insurance Companies  with inquiries  regarding the  Trust may
call the Trust's Shareholder  Servicing Agent. (See back  cover for address  and
phone number.)
                              -------------------
 
   
    The  SAI for  the Trust, dated  May 1, 1996,  as revised August  1, 1996, as
amended or supplemented from  time to time,  contains more detailed  information
about  each of the Series, including  information related to: (i) the investment
policies and  restrictions  of each  Series;  (ii) the  Trustees,  officers  and
investment  adviser of the Trust; (iii)  portfolio transactions; (iv) the shares
of each Series, including rights and liabilities of shareholders; (v) the method
used to calculate yield and total rate of return quotations of each Series; (vi)
the determination of net asset value of shares of each Series; and (vii) certain
voting rights of shareholders of each Series.
    
 
                                       44
<PAGE>
                                                                      APPENDIX A
 
                          DESCRIPTION OF BOND RATINGS
 
The ratings of Moody's, S&P and Fitch represent their opinions as to the quality
of  various debt instruments. It should be emphasized, however, that ratings are
not absolute standards of quality. Consequently, debt instruments with the  same
maturity,  coupon and rating may have different yields while debt instruments of
the same maturity and coupon with different ratings may have the same yield.
 
                        MOODY'S INVESTORS SERVICE, INC.
 
    AAA: 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 edged." 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.
 
    AA: 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  fluctuations  of
protective  elements may be of greater amplitude  or there may be other elements
present which  make the  long-term  risks appear  somewhat  larger than  in  Aaa
securities.
 
    A:  Bonds which are rated A possess many favorable investment attributes and
are to be considered as upper-medium-grade obligations. Factors giving  security
to  principal and interest are considered  adequate, but elements may be present
which suggest a susceptibility to impairment sometime in the future.
 
    BAA: 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.
 
    BA:  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.
 
    B:  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.
 
    CAA:  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.
 
    CA:  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.
 
    C: Bonds which are 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.
 
    ABSENCE OF RATING: Where no rating has  been assigned or where a rating  has
been  suspended or withdrawn, it may be  for reasons unrelated to the quality of
the issue.
 
    Should no rating be assigned, the reason may be one of the following:
 
    1.  an application for rating was not received or accepted;
 
    2.  the issue or issuer belongs  to a group of securities or companies  that
       are not rated as a matter of policy;
 
                                      A-1
<PAGE>
    3.  there is a lack of essential data pertaining to the issue or issuer; or
 
    4.    the  issue was  privately  placed, in  which  case the  rating  is not
       published in Moody's publications.
 
    Suspension or withdrawal may occur if new and material circumstances  arise,
the  effects  of which  preclude satisfactory  analysis; if  there is  no longer
available reasonable up-to-date  data to permit  a judgment to  be formed; if  a
bond is called for redemption; or for other reasons.
 
                       STANDARD & POOR'S RATINGS SERVICES
 
    AAA:  Debt rated AAA has the highest rating assigned by S&P. Capacity to pay
interest and repay principal is extremely strong.
 
    AA: Debt rated  AA has  a very  strong capacity  to pay  interest and  repay
principal and differs from the highest rated issues only in small degree.
 
    A:  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.
 
    BBB:  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.
 
    BB:  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.
 
    B: 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.
 
    CCC:  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.
 
    CC:  The rating CC is typically applied  to debt subordinated to senior debt
that is assigned an actual or implied CCC rating.
 
    C: 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.
 
    CI: The rating CI is reserved for income bonds on which no interest is being
paid.
 
    D:  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  S&P 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.
 
                                      A-2
<PAGE>
    PLUS (+) OR MINUS  (-): 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
rating categories.
 
    NR: Indicates  that no  public  rating has  been  requested, that  there  is
insufficient  information on which to base a rating, or that S&P does not rate a
particular type of obligation as a matter of policy.
 
A-1 AND P-1 COMMERCIAL PAPER RATINGS
 
Description of S&P, Fitch and Moody's highest commercial paper ratings:
 
    The rating "A" is  the highest commercial paper  rating assigned by S&P  and
Fitch,  and issues  so rated  are regarded as  having the  greatest capacity for
timely payment. Issues in the "A" category are delineated with the numbers 1,  2
and  3 to indicate the relative degree  of safety. The A-1 designation indicates
that the degree  of safety regarding  timely payment is  either overwhelming  or
very  strong.  Those  A-1  issues  determined  to  possess  overwhelming  safety
characteristics will be denoted with a plus (+) sign designation.
 
    The rating P-1 is the highest  commercial paper rating assigned by  Moody's.
Issuers  rated P-1 have a superior ability for repayment. P-1 repayment capacity
will normally be evidenced by the following characteristics: (1) leading  market
positions  in well  established industries;  (2) high  rates of  return on funds
employed; (3) conservative  capitalization structure with  moderate reliance  on
debt and ample asset protection; (4) broad margins in earnings coverage of fixed
financial  charges and high  internal cash generation;  and (5) well established
access to  a  range  of  financial markets  and  assured  sources  of  alternate
liquidity.
 
                         FITCH INVESTORS SERVICE, INC.
 
    AAA:  Bonds  considered to  be investment  grade and  of the  highest credit
quality. The obligor  has an exceptionally  strong ability to  pay interest  and
prepay  principal, which  is unlikely to  be affected  by reasonably foreseeable
events.
 
    AA: Bonds considered to be investment grade and of very high credit quality.
The obligor's  ability to  pay  interest and  repay  principal is  very  strong,
although  not quite as strong  as bonds rated 'AAA'.  Because bonds rated in the
'AAA' and 'AA' categories are not significantly vulnerable to foreseeable future
developments, short-term debt of these issuers is generally rated 'F-1+'.
 
    A: Bonds considered to be investment grade and of very high credit  quality.
The  obligor's ability to pay  interest and repay principal  is considered to be
strong, but may be more vulnerable to adverse changes in economic conditions and
circumstances than bonds with higher ratings.
 
    BBB: Bonds  considered to  be investment  grade and  of satisfactory  credit
quality. The obligor's ability to pay interest and repay principal is considered
to  be  adequate.  Adverse  changes in  economic  conditions  and circumstances,
however, are more likely to have  adverse impact on these bonds and,  therefore,
impair  timely payment. The likelihood that the ratings of these bonds will fall
below investment grade is higher than for bonds with higher ratings.
 
    BB: Bonds are considered speculative. The obligor's ability to pay  interest
and  repay  principal may  be affected  over time  by adverse  economic changes.
However, business  and  financial alternatives  can  be identified  which  could
assist the obligor in satisfying its debt service requirements.
 
    B:  Bonds are considered  highly speculative. While bonds  in this class are
currently meeting debt service requirements, the probability of continued timely
payment of  principal and  interest  reflects the  obligor's limited  margin  of
safety and the need for reasonable business and economic activity throughout the
life of the issue.
 
    CCC: Bonds have certain identifiable characteristics which, if not remedied,
may  lead to default.  The ability to meet  obligations requires an advantageous
business and economic environment.
 
                                      A-3
<PAGE>
    CC: Bonds are  minimally protected.  Default in payment  of interest  and/or
principal seems probable over time.
 
    C: Bonds are in imminent default in payment of interest of principal.
 
    PLUS(+)  MINUS(-): Plus  and minus  signs are used  with a  rating symbol to
indicate the relative position of a  credit within the rated category. Plus  and
minus signs, however, are not used in the 'AAA' category.
 
    NR: indicates that Fitch does not rate the specific issue.
 
    CONDITIONAL:  A conditional rating is  premised on the successful completion
of a project or the occurrence of a specific event.
 
    SUSPENDED: A rating is suspended when Fitch deems the amount of  information
available from the issuer to be inadequate for rating purposes.
 
    WITHDRAWN:  A rating will be withdrawn when an issue matures or is called or
refinanced, and, at Fitch's discretion, when  an issuer fails to furnish  proper
and timely information.
 
    FITCHALERT:  Ratings  are placed  on FitchAlert  to  notify investors  of an
occurrence that is likely to result in a rating change and the likely  direction
of  such  change.  These are  designated  a "Positive,"  indicating  a potential
upgrade, "Negative," for potential downgrade,  or "Evolving," where ratings  may
be lowered. FitchAlert is relatively short-term and should be resolved within 12
months.
 
                        DUFF & PHELPS CREDIT RATING CO.
 
    AAA:  Bonds  considered to  be investment  grade and  of the  highest credit
quality. The obligor  has an exceptionally  strong ability to  pay interest  and
repay  principal, which  is unlikely  to be  affected by  reasonably foreseeable
events.
 
    AA: Bonds considered to be investment grade and or very high credit quality.
The obligor's  ability to  pay  interest and  repay  principal is  very  strong,
although  not quite as strong  as bonds rated 'AAA'.  Because bonds rated in the
'AAA' and 'AA' categories are not significantly vulnerable to foreseeable future
developments, short-term debt of these issuers is generally rated 'D-1+'.
 
    A: Bonds considered to be investment  grade and of high credit quality.  The
obligor's  ability  to pay  interest  and repay  principal  is considered  to be
strong, but may be more vulnerable to adverse changes in economic conditions and
circumstances than bonds with higher ratings.
 
    BBB: Bonds  considered to  be investment  grade and  of satisfactory  credit
quality. The obligor's ability to pay interest and repay principal is considered
to  be  adequate.  Adverse  changes in  economic  conditions  and circumstances,
however, are more likely  to have adverse impact  on these bonds, and  therefore
impair  timely payment. The likelihood that the ratings of these bonds will fall
below investment grade is higher than for bonds with higher ratings.
 
    BB: Bonds are considered speculative. The obligor's ability to pay  interest
and  repay  principal may  be affected  over time  by adverse  economic changes.
However, business,  and financial  alternatives can  be identified  which  could
assist the obligor in satisfying its debt service requirements.
 
    B:  Bonds are considered  highly speculative. While bonds  in this class are
currently meeting debt service requirements, the probability of continued timely
payment of  principal and  interest  reflects the  obligor's limited  margin  of
safety and the need for reasonable business and economic activity throughout the
life of the issue.
 
    CCC: Bonds have certain identifiable characteristics which, if not remedied,
may  lead to default.  The ability to meet  obligations requires an advantageous
business and economic environment.
 
                                      A-4
<PAGE>
    PLUS (+) OR MINUS (-): Plus and minus signs are used with a rating symbol to
indicate the relative position  of a credit within  a rating category. Plus  and
minus signs, however, are not used in the 'AAA' category.
 
    NR: Indicates that Duff & Phelps does not rate the specific issue.
 
                        DUFF & PHELPS SHORT-TERM RATINGS
 
    D-1+:  Highest certainty of timely  payment. Short-term liquidity, including
internal operation factors  and/or access  to alternative sources  of funds,  is
outstanding  and  safety  is  just  below  risk-free  U.S.  Treasury  short-term
obligations.
 
    D-1: Very high certainty of timely payment. Liquidity factors are  excellent
and supported by good fundamental protection factors. Risk factors are minor.
 
    D-1-:  High certainty  of timely payment.  Liquidity factors  are strong and
supported by good fundamental protection factors. Risk factors are very small.
 
    D-2: Good  certainty  of  timely  payment.  Liquidity  factors  and  company
fundamentals  are  sound.  Although  ongoing  funding  needs  may  enlarge total
financing requirements,  access to  capital markets  is good.  Risk factors  are
small.
 
    D-3:  Satisfactory liquidity and other  protection factors qualify issues as
to investment grade.  Risk factors  are larger  and subject  to more  variation.
Nevertheless, timely payment is expected.
 
    D-4:  Speculative investment characteristics. Liquidity is not sufficient to
insure against disruption in debt  service. Operating factors and market  access
may be subject to a high degree of variation.
 
    D-5: Issuer failed to meet scheduled principal and/or interest payments.
 
                                      A-5
<PAGE>
                                                                      APPENDIX B
 
                  PRINCIPAL SECTORS OF THE UTILITIES INDUSTRY
 
The  principal sectors of the utility industry in which the Utilities Series may
invest are discussed below.
 
ELECTRIC -- The electric utility industry consists of companies that are engaged
principally in  the  generation,  transmission  and  sale  of  electric  energy,
although  many  also provide  other  energy-related services.  Domestic electric
utility companies, in general,  recently have been  favorably affected by  lower
fuel  and financing costs and the full  or near completion of major construction
programs. In  addition, many  of these  companies recently  have generated  cash
flows  in excess  of current  operating expenses  and construction expenditures,
permitting some  degree of  diversification  into unregulated  businesses.  Some
electric  utilities have also taken advantage of the right to sell power outside
of their traditional geographic  areas. Electric utility companies  historically
have  been subject  to the  risks associated  with increases  in fuel  and other
operating  costs,  high  interest  costs   on  borrowings  needed  for   capital
construction  programs, costs associated with  compliance with environmental and
safety regulations and changes in the regulatory climate.
 
    In the U.S., the construction and  operation of nuclear power facilities  is
subject  to  increased scrutiny  by, and  evolving  regulations of,  the Nuclear
Regulatory  Commission  and  state  agencies  having  comparable   jurisdiction.
Increased  scrutiny might  result in higher  operating costs  and higher capital
expenditures, with the risk that the regulators may disallow inclusion of  these
costs  in rate authorizations or the risk that a company may not be permitted to
operate or  complete  construction of  a  facility. In  addition,  operators  of
nuclear power plants may be subject to significant costs for disposal of nuclear
fuel and for the de-commissioning of such plants.
 
TELECOMMUNICATIONS  -- The telephone industry  is large and highly concentrated.
Companies that distribute telephone services and provide access to the telephone
networks comprise the greatest portion  of this segment. Telephone companies  in
the U.S. are still experiencing the effects of the breakup of American Telephone
&  Telegraph Company, which  occurred in 1984. Since  1984, companies engaged in
telephone communication services  have expanded  their non-regulated  activities
into  other businesses, including cellular  telephone services, data processing,
equipment retailing,  computer software  and  hardware services,  and  financial
services.  This  expansion has  provided  significant opportunities  for certain
telephone companies to  increase their  earnings and dividends  at faster  rates
than   had  been  allowed  in  traditionally  regulated  businesses.  Increasing
competition, technological innovations  and other  structural changes,  however,
could adversely affect the profitability of such utilities.
 
GAS  --  Gas  transmission companies  and  gas distribution  companies  are also
undergoing significant changes. In  the U.S., interstate transmission  companies
are regulated by the Federal Energy Regulatory Commission, which is reducing its
regulation  of the  industry. Many companies  have diversified into  oil and gas
exploration and development, making returns more sensitive to energy prices.  In
the  recent  decade,  gas  utility companies  have  been  adversely  affected by
disruptions in  the  oil industry  and  have  also been  affected  by  increased
concentration   and  competition.  In  the  opinion  of  the  Adviser,  however,
environmental considerations  could  improve the  gas  industry outlook  in  the
future.  For example, natural gas is the  cleanest of the hydrocarbon fuels, and
this may result in incremental shifts in fuel consumption toward natural gas and
away from oil and coal.
 
WATER -- Water supply utilities  are companies that collect, purify,  distribute
and  sell  water. In  the  U.S. and  around the  world,  the industry  is highly
fragmented because  most  of  the  supplies  are  owned  by  local  authorities.
Companies  in this industry are generally  mature and are experiencing little or
no per capita volume growth.
 
                              -------------------
 
    There can  be  no assurance  that  the positive  developments  noted  above,
including those relating to changing regulation, will occur or that risk factors
other than those noted above will not develop in the future.
 
                                      B-1
<PAGE>
   
                                                                      APPENDIX C
    
 
   
                             MFS HIGH INCOME SERIES
                          PORTFOLIO COMPOSITION CHART
                    FOR FISCAL YEAR ENDED DECEMBER 31, 1996
    
 
   
The table below shows the percentages of the Series' assets at December 31, 1996
invested  in bonds  assigned to  the various  rating categories  by S&P, Moody's
(provided only for bonds not rated by  S&P), Fitch (provided only for bonds  not
rated by S&P or Moody's) and Duff & Phelps (provided only for bonds not rated by
S&P,  Moody's  or  Fitch)  and in  unrated  bonds  determined by  MFS  to  be of
comparable quality. For split rated bonds, the  S&P rating is used. When an  S&P
rating  is unavailable, secondary  sources are selected  in the following order:
Moody's, Fitch and Duff & Phelps.
    
 
   
<TABLE>
<CAPTION>
                            UNRATED BONDS
                COMPILED    OF COMPARABLE
RATING           RATINGS       QUALITY        TOTAL
- -------------  -----------  --------------  ----------
<S>            <C>          <C>             <C>
AAA/Aaa
AA/Aa
A/A
BBB/Baa
BB/Ba               12.02                       12.02
B/B                 69.41          3.93         73.34
CCC/Caa              4.49                        4.49
CC/Ca
C/C
Default               .58                         .58
                    -----         -----         -----
    TOTAL           86.50          3.93         90.43
</TABLE>
    
 
The chart does  not necessarily  indicate what  the composition  of the  Series'
portfolio will be in subsequent years. Rather, the Series' investment objective,
policies  and restrictions indicate the extent  to which the Series may purchase
securities in the various categories.
 
                                      C-1
<PAGE>
   
                                                              APPENDIX C (CONT.)
    
 
   
                                MFS BOND SERIES
                          PORTFOLIO COMPOSITION CHART
                    FOR FISCAL YEAR ENDED DECEMBER 31, 1996
    
 
   
The table below shows the percentages of the Series' assets at December 31, 1996
invested in bonds  assigned to  the various  rating categories  by S&P,  Moody's
(provided  only for bonds not rated by  S&P), Fitch (provided only for bonds not
rated by S&P or Moody's) and Duff & Phelps (provided only for bonds not rated by
S&P, Moody's  or  Fitch)  and in  unrated  bonds  determined by  MFS  to  be  of
comparable  quality. For  split rated  bonds, the higher  of the  S&P or Moody's
rating is used. When  neither an S&P or  Moody's rating is available,  secondary
sources are selected in the following order: Fitch and Duff & Phelps.
    
 
   
<TABLE>
<CAPTION>
              COMPILED
RATING         RATINGS      TOTAL
- -----------  -----------  ----------
<S>          <C>          <C>         <C>
AAA/Aaa           31.50       31.50
AA/Aa              1.69        1.69
A/A                7.61        7.61
BBB/Baa           28.46       28.46
BB/Ba             14.35       14.35
B/B                1.28        1.28
CCC/Caa
CC/Ca
C/C
Default
                  -----       -----
    TOTAL         84.89       84.89
</TABLE>
    
 
The  chart does  not necessarily  indicate what  the composition  of the Series'
portfolio will be in subsequent years. Rather, the Series' investment objective,
policies and restrictions indicate the extent  to which the Series may  purchase
securities in the various categories.
 
                                      C-2
<PAGE>
INVESTMENT ADVISER
Massachusetts Financial Services Company
500 Boylston Street, Boston, MA 02116
(617) 954-5000
(800) 637-8730
 
DISTRIBUTOR
MFS Fund Distributors, Inc.
500 Boylston Street, Boston, MA 02116
(617) 954-5000
CUSTODIAN
Investors Bank & Trust Company
89 South Street, Boston, MA 02111
 
DIVIDEND DISBURSING AGENT
State Street Bank and Trust Company
225 Franklin Street, Boston, MA 02110
 
   
SHAREHOLDER SERVICING AGENT
MFS Service Center, Inc.
500 Boylston Street, Boston, MA 02116
Toll free: (800) 343-2829, ext. 3500
MAILING ADDRESS:
P.O. Box 1400, Boston, MA 02104-9985
INDEPENDENT AUDITORS
Deloitte & Touche LLP
125 Summer Street, Boston, MA 02110
    
                      ------------------------------------
 
                           MFS-REGISTERED TRADEMARK-
                                    VARIABLE
                                   INSURANCE
                                     TRUST
 
                                     [LOGO]
 
                                   PROSPECTUS
 
   
                                  MAY 1, 1997
    
 
                                     [LOGO]
 
               MFS-REGISTERED TRADEMARK- VARIABLE INSURANCE TRUST
                     500 Boylston Street, Boston, MA 02116
 
                            ------------------------
<PAGE>
 
   
<TABLE>
<S>                                      <C>
MFS-REGISTERED TRADEMARK- VARIABLE       STATEMENT OF
INSURANCE TRUST-SM-                      ADDITIONAL INFORMATION
 
                                                                 MAY 1, 1997
</TABLE>
    
 
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                                                     Page
                                                                                                     -----
<C>        <S>                                                                                    <C>
       1.  General Information and Definitions..................................................           2
       2.  Investment Techniques................................................................           2
       3.  Investment Restrictions..............................................................          16
       4.  Management of the Trust..............................................................          18
           Trustees.............................................................................          18
           Officers.............................................................................          18
           Trustee Compensation Table...........................................................          19
           Investment Adviser...................................................................          20
           Investment Advisory Agreement........................................................          20
           Administrator........................................................................          21
           Custodian............................................................................          21
           Shareholder Servicing Agent..........................................................          21
           Distributor..........................................................................          21
       5.  Portfolio Transactions and Brokerage Commissions.....................................          21
       6.  Tax Status...........................................................................          23
       7.  Net Income and Distributions.........................................................          23
       8.  Determination of Net Asset Value; Performance Information............................          24
       9.  Description of Shares, Voting Rights and Liabilities.................................          26
      10.  Independent Auditors and Financial Statements........................................          26
      11.  Appendix A...........................................................................         A-1
</TABLE>
    
 
MFS-Registered Trademark- VARIABLE INSURANCE TRUST-SM-
500 Boylston Street, Boston, Massachusetts 02116
(617) 954-5000
 
   
This  Statement of Additional Information, as  amended or supplemented from time
to time  (the  "SAI"),  sets forth  information  which  may be  of  interest  to
investors but which is not necessarily included in the Trust's Prospectus, dated
May  1, 1997,  as supplemented  from time to  time. This  SAI should  be read in
conjunction with the Prospectus, a copy of which may be obtained without  charge
by  contacting the Shareholder  Servicing Agent (see back  cover for address and
phone number).
    
 
THIS SAI RELATES TO THE TWELVE SERIES OF THE TRUST IDENTIFIED ON PAGE 2  HEREOF.
SHARES  OF THESE  SERIES ARE OFFERED  TO SEPARATE ACCOUNTS  OF CERTAIN INSURANCE
COMPANIES ("PARTICIPATING INSURANCE COMPANIES")  THAT FUND VARIABLE ANNUITY  AND
VARIABLE   LIFE  INSURANCE  CONTRACTS   ("CONTRACTS").  PARTICIPATING  INSURANCE
COMPANIES MAY CHOOSE TO  OFFER AS INVESTMENT OPTIONS  TO THEIR CONTRACT  HOLDERS
LESS  THAN ALL OF THE  TRUST'S SERIES, IN WHICH  CASE THE TRUST'S PROSPECTUS FOR
THOSE PARTICIPATING INSURANCE  COMPANIES WILL  BE REVISED TO  DESCRIBE ONLY  THE
SERIES OFFERED. THEREFORE, WHILE CERTAIN VERSIONS OF THE TRUST'S PROSPECTUS WILL
DESCRIBE  ONLY CERTAIN OF  THE TRUST'S SERIES, THIS  SAI INCLUDES INFORMATION ON
OTHER SERIES WHICH ARE NOT OFFERED PURSUANT TO SUCH PROSPECTUSES; IN WHICH  CASE
INFORMATION   CONCERNING  THESE   OTHER  SERIES   CONTAINED  HEREIN   SHOULD  BE
DISREGARDED.
 
THIS SAI IS NOT A PROSPECTUS  AND IS AUTHORIZED FOR DISTRIBUTION TO  PROSPECTIVE
INVESTORS ONLY IF PRECEDED OR ACCOMPANIED BY A CURRENT PROSPECTUS.
 
                                                                UST-13 12/93 785
<PAGE>
1.  GENERAL INFORMATION AND DEFINITIONS
 
MFS  Variable Insurance Trust (the "Trust") is a professionally managed open-end
management investment company  (a "mutual fund")  consisting of twelve  separate
series:  MFS Emerging  Growth Series (the  "Emerging Growth  Series"), MFS Value
Series (the "Value Series"),  MFS Research Series  (the "Research Series"),  MFS
Growth  With Income Series  (the "Growth With Income  Series"), MFS Total Return
Series (the  "Total  Return  Series"),  MFS  Utilities  Series  (the  "Utilities
Series"),  MFS  High  Income  Series  (the  "High  Income  Series"),  MFS  World
Governments Series (the "World Governments Series"), MFS Strategic Fixed  Income
Series  (the  "Strategic  Fixed  Income Series"),  MFS  Bond  Series  (the "Bond
Series"), MFS Limited Maturity  Series (the "Limited  Maturity Series") and  MFS
Money  Market Series (the  "Money Market Series")  (individually or collectively
hereinafter referred to  as a  "Series" or  the "Series").  The Emerging  Growth
Series  was previously known as  the "OTC Series" until  its name was changed on
June 1, 1995. The Value Series was previously known as the "Growth Series" until
its name was changed on April 25, 1996.
 
Each Series' investment adviser and distributor is, respectively,  Massachusetts
Financial  Services Company ("MFS" or the  "Adviser") and MFS Fund Distributors,
Inc. ("MFD" or the "Distributor"), each a Delaware corporation.
 
2.  INVESTMENT TECHNIQUES
 
LENDING OF PORTFOLIO  SECURITIES: Each of  the Series (except  the Money  Market
Series)  may seek to  increase its income by  lending portfolio securities. Such
loans will usually be made only to  member firms of the New York Stock  Exchange
(the  "Exchange") (and  subsidiaries thereof)  and member  banks of  the Federal
Reserve System, and would be required  to be secured continuously by  collateral
in  cash, United States ("U.S.") Treasury securities or an irrevocable letter of
credit maintained on a current basis at  an amount at least equal to the  market
value of the securities loaned. A Series would have the right to call a loan and
obtain the securities loaned at any time on customary industry settlement notice
(which  will not usually exceed five business days). For the duration of a loan,
the Series would continue to receive the equivalent of the interest or dividends
paid by the issuer on the securities loaned and would also receive  compensation
from  the investment of cash collateral. The Series would not, however, have the
right to vote any  securities having voting rights  during the existence of  the
loan, but the Series would call the loan in anticipation of an important vote to
be  taken among  holders of the  securities or  of the giving  or withholding of
their consent  on a  material matter  affecting the  investment. As  with  other
extensions of credit there are risks of delay in recovery or even loss of rights
in  the  collateral  should the  borrower  of the  securities  fail financially.
However, the loans would be  made only to firms deemed  by the Adviser to be  of
good standing, and when, in the judgment of the Adviser, the consideration which
can  be  earned  currently from  securities  loans  of this  type  justifies the
attendant risk.  If the  Adviser  determines to  make  securities loans,  it  is
intended  that the value  of the securities  loaned would not  exceed 10% of the
value of a Series' net assets.
 
REPURCHASE AGREEMENTS: Each of the  Series may enter into repurchase  agreements
with  sellers who are member firms (or  a subsidiary thereof) of the Exchange or
members of  the  Federal  Reserve System,  recognized  primary  U.S.  Government
securities  dealers or  institutions which the  Adviser has determined  to be of
comparable creditworthiness. The  securities that a  Series purchases and  holds
through  its agent are U.S. Government securities, the values of which are equal
to or greater than  the repurchase price  agreed to be paid  by the seller.  The
repurchase  price may  be higher than  the purchase price,  the difference being
income to the Series,  or the purchase  and repurchase prices  may be the  same,
with  interest at a standard rate due to the Series together with the repurchase
price on repurchase. In either  case, the income to  the Series is unrelated  to
the interest rate on the Government securities.
 
The  repurchase agreement provides that in the event the seller fails to pay the
price agreed upon on the agreed upon  delivery date or upon demand, as the  case
may be, a Series will have the right to liquidate the securities. If at the time
the  Series is  contractually entitled  to exercise  its right  to liquidate the
securities, the seller is subject to  a proceeding under the bankruptcy laws  or
its  assets are otherwise subject  to a stay order,  the Series' exercise of its
right to liquidate the  securities may be delayed  and result in certain  losses
and  costs to the Series.  Each Series has adopted  and follows procedures which
are intended to minimize the risks  of repurchase agreements. For example,  each
Series  only enters into repurchase agreements  after the Adviser has determined
that the  seller  is  creditworthy,  and  the  Adviser  monitors  that  seller's
creditworthiness on an ongoing basis. Moreover, under such agreements, the value
of the securities (which are marked to market every business day) is required to
be  greater than the repurchase price, and a Series has the right to make margin
calls at any time  if the value  of the securities falls  below the agreed  upon
margin.
 
   
"WHEN-ISSUED"  SECURITIES: Each of  the Series (except  the Research Series, the
World Governments Series and the Money Market Series) may purchase securities on
a "when-issued"  or on  a "forward  delivery" basis.  Although a  Series is  not
limited  as to the amount of these  securities for which it may have commitments
to purchase on such  bases, it is expected  that under normal circumstances  the
Series will not commit more than 20% of its total assets to such purchases. When
a  Series commits  to purchase these  securities on a  "when-issued" or "forward
delivery" basis, it will set up procedures consistent with the General Statement
of Policy of the Securities and Exchange Commission (the "SEC") concerning  such
purchases.  Since that policy currently recommends that an amount of the Series'
assets equal to the  amount of the  purchase be held aside  or segregated to  be
used  to  pay for  the commitment,  the  Series will  always have  liquid assets
sufficient to cover any commitments or to limit any potential risk. Although  no
Series  intends to make such purchases  for speculative purposes and each Series
intends to adhere to the provisions  of the SEC policy, purchases of  securities
on  such bases may involve more risk than other types of purchases. For example,
a Series may  have to sell  assets which have  been set aside  in order to  meet
redemptions.  Also, if a  Series determines it  is necessary to  sell the "when-
issued" or "forward delivery" securities before delivery, the Series may incur a
loss because of market  fluctuations since the time  the commitment to  purchase
such securities was made.
    
 
MORTGAGE  "DOLLAR ROLL" TRANSACTIONS: Each of  the Total Return Series, the Bond
Series, the Strategic  Fixed Income  Series, the World  Governments Series,  the
Limited Maturity Series, the High
 
                                       2
<PAGE>
   
Income  Series and  the Utilities Series  may enter into  mortgage "dollar roll"
transactions pursuant to which it sells mortgage-backed securities for  delivery
in  the future and simultaneously  contracts to repurchase substantially similar
securities on a specified future date.  The Series record these transactions  as
sale  and purchase transactions,  rather than as  borrowing transactions. During
the  roll  period,  a  Series  foregoes  principal  and  interest  paid  on  the
mortgage-backed securities. A Series is compensated for the lost interest by the
difference  between the current sales  price and the lower  price for the future
purchase (often referred to as the "drop") as well as by the interest earned  on
the  cash proceeds  of the  initial sale.  A Series  may also  be compensated by
receipt of a commitment fee.  In the event that the  party with whom the  Series
contracts  to replace substantially similar securities on a future date fails to
deliver such securities, the Series may not be able to obtain such securities at
the price specified in  such contract and  thus may not  benefit from the  price
differential between the current sales price and the repurchase price.
    
 
CORPORATE ASSET-BACKED SECURITIES: Each of the Emerging Growth Series, the Total
Return Series, the Bond Series, the Limited Maturity Series, the Strategic Fixed
Income  Series, the High  Income Series and  the Utilities Series  may invest in
corporate asset-backed  securities.  These  securities,  issued  by  trusts  and
special  purpose corporations, are  backed by a  pool of assets,  such as credit
card and automobile loan receivables,  representing the obligations of a  number
of different parties.
 
Corporate  asset-backed securities present  certain risks. For  instance, in the
case of credit card  receivables, these securities may  not have the benefit  of
any  security interest  in the related  collateral. Credit  card receivables are
generally unsecured and the debtors are  entitled to the protection of a  number
of  state and federal consumer credit laws,  many of which give such debtors the
right to set off certain amounts owed on the credit cards, thereby reducing  the
balance  due. Most  issuers of  automobile receivables  permit the  servicers to
retain possession of the  underlying obligations. If the  servicer were to  sell
these  obligations to another  party, there is  a risk that  the purchaser would
acquire an interest superior  to that of the  holders of the related  automobile
receivables.  In addition, because of the large number of vehicles involved in a
typical issuance and technical  requirements under state  laws, the trustee  for
the  holders  of  the automobile  receivables  may  not have  a  proper security
interest in all of the obligations backing such receivables. Therefore, there is
the possibility  that recoveries  on  repossessed collateral  may not,  in  some
cases,  be available  to support  payments on  these securities.  The underlying
assets  (E.G.,  loans)  are  also  subject  to  prepayments  which  shorten  the
securities weighted average life and may lower their return.
 
Corporate  asset-backed  securities  are  often  backed  by  a  pool  of  assets
representing the obligations  of a number  of different parties.  To lessen  the
effect  of  failures by  obligors  on underlying  assets  to make  payments, the
securities  may  contain  elements  of  credit  support  which  fall  into   two
categories:   (i)  liquidity  protection  and  (ii)  protection  against  losses
resulting from  ultimate  default  by  an  obligor  on  the  underlying  assets.
Liquidity  protection  refers to  the provision  of  advances, generally  by the
entity administering the pool of assets, to ensure that the receipt of  payments
on  the underlying  pool occurs in  a timely fashion.  Protection against losses
resulting from ultimate  default ensures payment  through insurance policies  or
letters of credit obtained by the issuer or sponsor from third parties. A Series
will  not pay any additional or separate  fees for credit support. The degree of
credit support  provided  for  each  issue  is  generally  based  on  historical
information  respecting the level of credit  risk associated with the underlying
assets. Delinquency or  loss in  excess of that  anticipated or  failure of  the
credit  support could  adversely affect  the return on  an investment  in such a
security.
 
COLLATERALIZED MORTGAGE OBLIGATIONS AND MULTICLASS PASS-THROUGH SECURITIES: Each
of the Bond  Series, the Strategic  Fixed Income Series,  the World  Governments
Series,  the Limited Maturity  Series, the High Income  Series and the Utilities
Series may invest a portion of its assets in collateralized mortgage obligations
or "CMOs",  which  are debt  obligations  collateralized by  mortgage  loans  or
mortgage  pass-through securities  (such collateral referred  to collectively as
"Mortgage Assets").  Unless  the  context indicates  otherwise,  all  references
herein to CMOs include multiclass pass-through securities.
 
Interest  is paid or accrues on all classes  of the CMOs on a monthly, quarterly
or semi-annual basis. The principal of  and interest on the Mortgage Assets  may
be allocated among the several classes of a series of a CMO in innumerable ways.
In   a  common  structure,  payments   of  principal,  including  any  principal
prepayments, on the Mortgage Assets are applied to the classes of the series  of
a  CMO in the order of their  respective stated maturities or final distribution
dates, so that no payment of principal will  be made on any class of CMOs  until
all  other classes having an earlier  stated maturity or final distribution date
have been paid in full. Certain  CMOs may be stripped (securities which  provide
only the principal or interest factor of the underlying security). See "Stripped
Mortgage-Backed  Securities" below for a discussion of the risks of investing in
these stripped securities and of  investing in classes consisting of  principals
of interest payments or principal payments.
 
Each  of  the  Bond  Series,  the  Strategic  Fixed  Income  Series,  the  World
Governments Series, the Limited Maturity Series, the High Income Series and  the
Utilities  Series may also invest in  parallel pay CMOs and Planned Amortization
Class CMOs ("PAC Bonds"). Parallel pay  CMOs are structured to provide  payments
of  principal on each  payment date to  more than one  class. These simultaneous
payments are taken into account in calculating the stated maturity date or final
distribution date of each  class, which, as with  other CMO structures, must  be
retired  by  its stated  maturity date  or  final distribution  date but  may be
retired earlier.
 
STRIPPED MORTGAGE-BACKED  SECURITIES: Each  of the  Bond Series,  the  Strategic
Fixed Income Series, the World Governments Series and the High Income Series may
invest  a portion of its assets  in stripped mortgage-backed securities ("SMBS")
which are derivative  multiclass mortgage  securities issued by  agencies of  or
instrumentalities  of  the U.S.  Government, or  by  private originators  of, or
investors in mortgage loans, including  savings and loan institutions,  mortgage
banks, commercial banks and investment banks.
 
SMBS  are usually structured with two classes that receive different proportions
of the interest and  principal distributions from a  pool of mortgage assets.  A
common  type of SMBS will have one class receiving some of the interest and most
of the principal from the
 
                                       3
<PAGE>
Mortgage Assets, while the other class will receive most of the interest and the
remainder of the principal. In the most extreme case, one class will receive all
of the interest  (the interest-only or  "IO" class) while  the other class  will
receive  all of the principal  (the principal-only or "PO"  class). The yield to
maturity on an  IO is  extremely sensitive to  the rate  of principal  payments,
including  prepayments on  the related underlying  Mortgage Assets,  and a rapid
rate of principal payments may have a material adverse effect on such security's
yield to maturity.  If the  underlying Mortgage Assets  experience greater  than
anticipated  prepayments of  principal, a  Series may  fail to  fully recoup its
initial investment in these securities. The market value of the class consisting
primarily or entirely of principal  payments generally is unusually volatile  in
response  to  changes  in  interest  rates.  Because  SMBS  were  only  recently
introduced, established  trading  markets  for these  securities  have  not  yet
developed,  although the securities are traded among institutional investors and
investment banking firms.
 
LOAN PARTICIPATIONS AND OTHER DIRECT  INDEBTEDNESS: Each of the Emerging  Growth
Series,  the Value Series,  the Total Return Series,  the Strategic Fixed Income
Series and the  High Income Series  may purchase loan  participations and  other
direct  indebtedness. In purchasing a loan participation, a Series acquires some
or all of the  interest of a bank  or other lending institution  in a loan to  a
corporate borrower. Many such loans are secured, although some may be unsecured.
Such  loans may be  in default at the  time of purchase.  Loans and other direct
indebtedness that  are fully  secured offer  a Series  more protection  than  an
unsecured  loan in the event of  non-payment of scheduled interest or principal.
However, there is no assurance that the liquidation of collateral from a secured
loan or  other  direct  indebtedness  would  satisfy  the  corporate  borrower's
obligation, or that the collateral can be liquidated.
 
   
These loans and other direct indebtedness are made generally to finance internal
growth,  mergers, acquisitions, stock repurchases,  leveraged buy-outs and other
corporate activities.  Such  loans  and  other  direct  indebtedness  loans  are
typically  made by a syndicate of  lending institutions, represented by an agent
lending institution  which  has  negotiated  and  structured  the  loan  and  is
responsible  for collecting interest, principal and other amounts due on its own
behalf and on behalf of the others  in the syndicate, and for enforcing its  and
their  other rights  against the borrower.  Alternatively, such  loans and other
direct indebtedness may be structured as a novation, pursuant to which a  Series
would  assume all of  the rights of the  lending institution in a  loan or as an
assignment, pursuant  to which  the Series  would purchase  an assignment  of  a
portion  of a lender's  interest in a  loan or other  direct indebtedness either
directly from the lender or through an intermediary. A Series may also  purchase
trade or other claims against companies, which generally represent money owed by
the  company  to a  supplier  of goods  or services.  These  claims may  also be
purchased at a time when the company is in default.
    
 
   
Certain of the loan participations and the other direct indebtedness acquired by
a Series  may involve  revolving credit  facilities or  other standby  financing
commitments  which obligate the Series to pay  additional cash on a certain date
or on demand. These  commitments may have  the effect of  requiring a Series  to
increase  its  investment in  a  company at  a time  when  the Series  might not
otherwise decide to  do so  (including at a  time when  the company's  financial
condition  makes it unlikely  that such amounts  will be repaid).  To the extent
that a Series is  committed to advance  additional funds, it  will at all  times
hold  and maintain in a segregated account liquid assets in an amount sufficient
to meet such commitments.
    
 
A Series' ability to  receive payment of principal,  interest and other  amounts
due  in connection with these investments will depend primarily on the financial
condition of the borrower. In selecting the loan participations and other direct
indebtedness which a Series  will purchase, the Adviser  will rely upon its  own
(and not the original lending institution's) credit analysis of the borrower. As
the  Series may be required to rely  upon another lending institution to collect
and pass onto the Series amounts payable with respect to the loan and to enforce
the Series' rights under the loan and other direct indebtedness, an  insolvency,
bankruptcy or reorganization of the lending institution may delay or prevent the
Series  from receiving such amounts. In such  cases, the Series will evaluate as
well the creditworthiness  of the lending  institution and will  treat both  the
borrower  and the lending  institution as an "issuer"  of the loan participation
for  purposes   of   certain   investment   restrictions   pertaining   to   the
diversification  of  the  Series' portfolio  investments.  The  highly leveraged
nature of many such loans and other direct indebtedness may make such loans  and
other  direct indebtedness especially vulnerable  to adverse changes in economic
or market conditions. Investments  in such loans  and other direct  indebtedness
may  involve additional risk to a Series. For example, if a loan or other direct
indebtedness is foreclosed, a Series could become part owner of any  collateral,
and would bear the costs and liabilities associated with owning and disposing of
the  collateral.  In  addition,  it is  conceivable  that  under  emerging legal
theories of lender liability, a Series could  be held liable as a co-lender.  It
is unclear whether loans and other forms of direct indebtedness offer securities
law   protections  against  fraud  and  misrepresentation.  In  the  absence  of
definitive regulatory guidance, each Series relies on the Adviser's research  in
an attempt to avoid situations where fraud and misrepresentation could adversely
affect  a Series. In addition, loan  participations and other direct investments
may not  be in  the form  of securities  or may  be subject  to restrictions  on
transfer,  and only limited opportunities may  exist to resell such instruments.
As a result, a  Series may be  unable to sell such  investments at an  opportune
time  or may have to resell  them at less than fair  market value. To the extent
that the Adviser  determines that any  such investments are  illiquid, a  Series
will include them in the investment limitations described below.
 
MORTGAGE  PASS-THROUGH SECURITIES:  Each of  the Total  Return Series,  the Bond
Series, the World Governments Series, the  Limited Maturity Series and the  High
Income  Series  may invest  in mortgage  pass-through securities.  The Utilities
Series may invest in mortgage pass-through securities that are securities issued
or guaranteed as to principal and interest by the U.S. Government, its agencies,
authorities  or   instrumentalities.   Mortgage  pass-through   securities   are
securities representing interests in "pools" of mortgage loans. Monthly payments
of  interest and principal  by the individual borrowers  on mortgages are passed
through to the  holders of the  securities (net of  fees paid to  the issuer  or
guarantor  of the securities) as the  mortgages in the underlying mortgage pools
are   paid    off.    The    average    lives    of    mortgage    pass-throughs
 
                                       4
<PAGE>
   
are variable when issued because their average lives depend on prepayment rates.
The  average life of these securities is likely to be substantially shorter than
their stated final  maturity as  a result of  unscheduled principal  prepayment.
Prepayments  on underlying mortgages  result in a  loss of anticipated interest,
and all or part  of a premium  if any has  been paid, and  the actual yield  (or
total  return)  to the  Series may  be different  than the  quoted yield  on the
securities. Mortgage premiums generally increase with falling interest rates and
decrease with rising interest  rates. Like other  fixed income securities,  when
interest  rates rise the value of  mortgage pass-through security generally will
decline; however,  when interest  rates  are declining,  the value  of  mortgage
pass-through  securities with  prepayment features may  not increase  as much as
that of other fixed-income securities.
    
 
Payment of principal and interest on some mortgage pass-through securities  (but
not the market value of the securities themselves) may be guaranteed by the full
faith and credit of the U.S. Government (in the case of securities guaranteed by
the Government National Mortgage Association ("GNMA"); or guaranteed by agencies
or  instrumentalities  of  the U.S.  Government  (such as  the  Federal National
Mortgage Association ("FNMA")  or the  Federal Home  Loan Mortgage  Corporation,
("FHLMC")  which are supported  only by the discretionary  authority of the U.S.
Government  to  purchase  the   agency's  obligations).  Mortgage   pass-through
securities  may also be  issued by non-governmental  issuers (such as commercial
banks, savings  and loan  institutions,  private mortgage  insurance  companies,
mortgage  bankers and  other secondary market  issuers). Some  of these mortgage
pass-through securities  may  be supported  by  various forms  of  insurance  or
guarantees.
 
Interests  in pools  of mortgage-related securities  differ from  other forms of
debt securities,  which normally  provide for  periodic payment  of interest  in
fixed  amounts  with principal  payments at  maturity  or specified  call dates.
Instead, these  securities provide  a  monthly payment  which consists  of  both
interest  and principal payments. In effect, these payments are a "pass-through"
of the  monthly payments  made by  the individual  borrowers on  their  mortgage
loans,  net of  any fees  paid to  the issuer  or guarantor  of such securities.
Additional payments are caused  by prepayments of  principal resulting from  the
sale,  refinancing or  foreclosure of  the underlying  property, net  of fees or
costs which  may be  incurred. Some  mortgage pass-through  securities (such  as
securities  issued by the GNMA) are  described as "modified pass-through." These
securities entitle the holder  to receive all  interests and principal  payments
owed  on  the  mortgages in  the  mortgage pool,  net  of certain  fees,  at the
scheduled payment dates regardless of  whether the mortgagor actually makes  the
payment.
 
The  principal  governmental guarantor  of  mortgage pass-through  securities is
GNMA. GNMA is a wholly owned  U.S. Government corporation within the  Department
of Housing and Urban Development. GNMA is authorized to guarantee, with the full
faith  and credit of  the U.S. Government,  the timely payment  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. These guarantees, however,  do
not apply to the market value or yield of mortgage pass-through securities. GNMA
securities  are often  purchased at  a premium  over the  maturity value  of the
underlying mortgages.  This  premium is  not  guaranteed  and will  be  lost  if
prepayment occurs.
 
Government-related guarantors (I.E., whose guarantees are not backed by the full
faith  and credit  of the  U.S. Government)  include FNMA  and FHLMC.  FNMA is a
government-sponsored corporation owned entirely  by private stockholders. It  is
subject to general regulation by the Secretary of Housing and Urban Development.
FNMA  purchases conventional residential mortgages  (I.E., mortgages not insured
or  guaranteed   by  any   governmental  agency)   from  a   list  of   approved
seller/servicers  which include state  and federally chartered  savings and loan
associations, mutual savings banks, commercial banks, credit unions and mortgage
bankers. Pass-through  securities issued  by FNMA  are guaranteed  as to  timely
payment by FNMA of principal and interest.
 
FHLMC  is also a government-sponsored corporation owned by private stockholders.
FHLMC issues  Participation Certificates  ("PCs") which  represent interests  in
conventional  mortgages (I.E., not federally  insured or guaranteed) for FHLMC's
national portfolio. FHLMC  guarantees timely  payment of  interest and  ultimate
collection  of principal  regardless of  the status  of the  underlying mortgage
loans.
 
Commercial banks,  savings and  loan  institutions, private  mortgage  insurance
companies,  mortgage  bankers and  other  secondary market  issuers  also create
pass-through pools of mortgage loans. Such  issuers may also be the  originators
and/or servicers of the underlying mortgage-related securities. Pools created by
such  non-governmental issuers  generally offer a  higher rate  of interest than
government and government-related pools because there are no direct or  indirect
government or agency guarantees of payments in the former pools. However, timely
payment  of  interest and  principal of  mortgage  loans in  these pools  may be
supported by  various forms  of insurance  or guarantees,  including  individual
loan,  title, pool and hazard insurance and letters of credit. The insurance and
guarantees are  issued  by  governmental  entities,  private  insurers  and  the
mortgage  poolers.  There  can be  no  assurance  that the  private  insurers or
guarantors can meet their obligations under the insurance policies or  guarantee
arrangements.   A  Series  may  also  buy  mortgage-related  securities  without
insurance or guarantees.
 
INDEXED SECURITIES: Each of the Value Series, the Total Return Series, the  High
Income  Series, the Bond Series, the  Utilities Series and the World Governments
Series may purchase securities whose prices  are indexed to the prices of  other
securities,   securities   indices,   currencies,  precious   metals   or  other
commodities, or other  financial indicators. Indexed  securities typically,  but
not  always,  are debt  securities or  deposits whose  value at  maturity (i.e.,
principal value)  or  coupon rate  is  determined  by reference  to  a  specific
instrument or statistic. Gold-indexed securities, for example, typically provide
for  a maturity value that depends on the price of gold, resulting in a security
whose price tends to rise and  fall together with gold prices.  Currency-indexed
securities  typically are short-term to  intermediate-term debt securities whose
maturity values or interest rates are  determined by reference to the values  of
one  or more specified foreign currencies, and may offer higher yields than U.S.
dollar-denominated securities of equivalent issuers. Currency-indexed securities
may be positively or negatively indexed; that is,
 
                                       5
<PAGE>
their maturity value may increase  when the specified currency value  increases,
resulting  in  a  security  that  performs  similarly  to  a foreign-denominated
instrument,  or  their  maturity  value  may  decline  when  foreign  currencies
increase,  resulting in a security whose  price characteristics are similar to a
put on the underlying currency. Currency-indexed securities may also have prices
that depend on the values of  a number of different foreign currencies  relative
to each other.
 
The  performance  of  indexed  securities  depends  to  a  great  extent  on the
performance of the  security, currency, or  other instrument to  which they  are
indexed,  and may also  be influenced by  interest rate changes  in the U.S. and
abroad. At the  same time, indexed  securities are subject  to the credit  risks
associated  with  the  issuer of  the  security,  and their  values  may decline
substantially if the issuer's  creditworthiness deteriorates. Recent issuers  of
indexed   securities  have  included  banks,   corporations,  and  certain  U.S.
government agencies.
 
SWAPS AND  RELATED TRANSACTIONS:  Each  of the  High  Income Series,  the  World
Governments  Series, the Strategic Fixed Income  Series, the Bond Series and the
Limited Maturity Series may enter into  interest rate swaps, currency swaps  and
other types of available swap agreements, such as caps, collars and floors.
 
Swap  agreements  may  be  individually  negotiated  and  structured  to include
exposure to  a variety  of different  types of  investments or  market  factors.
Depending on their structure, swap agreements may increase or decrease a Series'
exposure  to long or short-term interest rates  (in the U.S. or abroad), foreign
currency values,  mortgage  securities,  corporate  borrowing  rates,  or  other
factors  such as securities prices or  inflation rates. Swap agreements can take
many different  forms and  are known  by a  variety of  names. A  Series is  not
limited to any particular form or variety of swap agreement if MFS determines it
is consistent with the Series' investment objective and policies.
 
Each  of the  High Income  Series, the  World Governments  Series, the Strategic
Fixed Income  Series, the  Bond  Series and  the  Limited Maturity  Series  will
maintain  cash  or appropriate  liquid assets  with its  custodian to  cover its
current obligations under  swap transactions.  If a  Series enters  into a  swap
agreement on a net basis (I.E., the two payment streams are netted out, with the
Series  receiving or paying, as the case may  be, only the net amount of the two
payments), the Series  will maintain cash  or liquid assets  with its  Custodian
with  a daily value at least equal to the excess, if any, of the Series' accrued
obligations under  the swap  agreement over  the accrued  amount the  Series  is
entitled  to  receive  under the  agreement.  If  a Series  enters  into  a swap
agreement on other than a net basis, it will maintain cash or liquid assets with
a value equal to the  full amount of the  Series' accrued obligations under  the
agreement.
 
The  most  significant factor  in  the performance  of  swaps, caps,  floors and
collars is the change  in the specific interest  rate, currency or other  factor
that  determines the amount of payments to be made under the arrangement. If the
Adviser  is  incorrect  in  its  forecasts  of  such  factors,  the   investment
performance  of a  Series would be  less than what  it would have  been if these
investment techniques had not been used. If a swap agreement calls for  payments
by  a Series,  the Series must  be prepared to  make such payments  when due. In
addition, if the counterparty's creditworthiness declined, the value of the swap
agreement would be likely to decline, potentially resulting in losses.
 
If the counterparty defaults, a Series' risk of loss consists of the net  amount
of  payments that the  Series is contractually entitled  to receive. Each Series
anticipates that it will be able to eliminate or reduce its exposure under these
arrangements  by  assignment  or  other  disposition  or  by  entering  into  an
offsetting agreement with the same or another counterparty.
 
OPTIONS ON SECURITIES: Each of the Emerging Growth Series, the Value Series, the
Total  Return Series,  the Bond Series,  the Strategic Fixed  Income Series, the
World Governments Series,  the Growth  With Income  Series and  the High  Income
Series  may write (sell) covered put and call options, and purchase put and call
options, on securities. Call and put options written by a Series may be  covered
in the manner set forth below.
 
   
A  call option written by a Series is  "covered" if the Series owns the security
underlying 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 a 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 liquid assets  in a segregated account  with its custodian. A  put
option  written by a Series  is "covered" if the  Series maintains liquid assets
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 or  where the exercise
price of the put held is less than the exercise price of the put written if  the
difference  is maintained by the Series in liquid assets in a segregated account
with its custodian. Put and call options written by a Series may also be covered
in such  other manner  as may  be in  accordance with  the requirements  of  the
exchange  on which, or  the counterparty with  which, the option  is traded, and
applicable laws and regulations. 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.
    
 
   
Effecting a closing transaction in the case of a written call option will permit
a  Series to write another call option  on the underlying security with either a
different exercise price or expiration date or both, or in the case of a written
put option will permit the Series to write another put option to the extent that
the exercise price thereof is secured by liquid assets. Such transactions permit
a Series  to generate  additional premium  income, which  will partially  offset
declines  in  the value  of portfolio  securities  or increases  in the  cost of
securities to be acquired. Also, effecting a closing transaction will permit the
cash or  proceeds from  the concurrent  sale of  any securities  subject to  the
option  to be  used for  other investments  of a  Series, provided  that another
option on such security is not written. If a Series desires to sell a particular
security from its
    
 
                                       6
<PAGE>
portfolio on  which it  has written  a call  option, it  will effect  a  closing
transaction  in connection with the option prior  to or concurrent with the sale
of the security.
 
A Series will realize a profit from a closing transaction if the premium paid in
connection with the closing of an option written by the Series is less than  the
premium  received  from  writing  the  option, or  if  the  premium  received in
connection with the closing of an option purchased by a Series is more than  the
premium  paid for the original purchase. Conversely, a Series will suffer a loss
if the premium paid or received in connection with a closing transaction is more
or less, respectively,  than the premium  received or paid  in establishing  the
option  position. Because increases  in the market  price of a  call option will
generally reflect increases in the market price of the underlying security,  any
loss  resulting from  the repurchase  of a call  option previously  written by a
Series is  likely to  be offset  in  whole or  in part  by appreciation  of  the
underlying security owned by the Series.
 
The Series may write options in connection with buy-and-write transactions; that
is,  a Series may purchase a security and  then write a call option against that
security. The  exercise price  of the  call a  Series determines  to write  will
depend upon the expected price movement of the underlying security. The exercise
price  of a call option may be below ("in-the-money"), equal to ("at-the-money")
or above ("out-of-the-money") the  current value of  the underlying security  at
the  time the option  is written. Buy-and-write  transactions using in-the-money
call options may be used  when it is expected that  the price of the  underlying
security  will  decline  moderately  during  the  option  period.  Buy-and-write
transactions using out-of-the-money call options may be used when it is expected
that the premiums received from writing the call option plus the appreciation in
the market price of  the underlying security  up to the  exercise price will  be
greater  than the appreciation in the price of the underlying security alone. If
the call options are exercised in such transactions, a Series' maximum gain will
be the  premium received  by it  for  writing the  option, adjusted  upwards  or
downwards  by the difference between the  Series' purchase price of the security
and the exercise price, less related  transaction costs. If the options are  not
exercised  and the price of the underlying security declines, the amount of such
decline will be offset in part, or entirely, by the premium received.
 
The  writing  of  covered  put  options  is  similar  in  terms  of  risk/return
characteristics  to  buy-and-write  transactions.  If the  market  price  of the
underlying security rises  or otherwise  is above  the exercise  price, the  put
option  will expire worthless and a Series'  gain will be limited to the premium
received, less related transaction costs. If the market price of the  underlying
security  declines or otherwise is below the  exercise price, a Series may elect
to close the position or retain the option until it is exercised, at which  time
the  Series will be  required to take  delivery of the  security at the exercise
price; a Series' return will be the  premium received from the put option  minus
the  amount by  which the  market price  of the  security is  below the exercise
price,  which  could  result  in  a  loss.  Out-of-the-money,  at-the-money  and
in-the-money put options may be used by a Series in the same market environments
that call options are used in equivalent buy-and-write transactions.
 
A  Series  may also  write  combinations of  put and  call  options on  the same
security, known  as "straddles,"  with the  same exercise  price and  expiration
date.  By writing a  straddle, a Series undertakes  a simultaneous obligation to
sell and purchase  the same security  in the event  that one of  the options  is
exercised.  If the price  of the security  subsequently rises sufficiently above
the exercise price to cover the amount of the premium and transaction costs, the
call will  likely be  exercised and  the Series  will be  required to  sell  the
underlying  security at a below market price.  This loss may be offset, however,
in whole or part, by  the premiums received on the  writing of the two  options.
Conversely,  if the price of  the security declines by  a sufficient amount, the
put will likely be exercised. The writing of straddles will likely be effective,
therefore, only where the price of  the security remains stable and neither  the
call  nor the put is  exercised. In those instances where  one of the options is
exercised, the  loss on  the purchase  or sale  of the  underlying security  may
exceed the amount of the premiums received.
 
By  writing a call  option, a Series  limits its opportunity  to profit from any
increase in the market value of the underlying security above the exercise price
of the option. By writing a put option, a Series assumes the risk that it may be
required to purchase  the underlying security  for an exercise  price above  its
then  current  market value,  resulting in  a capital  loss unless  the security
subsequently appreciates in value. The writing of options on securities will not
be undertaken by a Series solely for hedging purposes, and could involve certain
risks which are not present in the case of hedging transactions. Moreover,  even
where  options are  written for  hedging purposes,  such transactions constitute
only a partial hedge  against declines in the  value of portfolio securities  or
against increases in the value of securities to be acquired, up to the amount of
the premium.
 
A  Series may purchase options  for hedging purposes or  to increase its return.
Put options  may  be purchased  to  hedge against  a  decline in  the  value  of
portfolio  securities. If  such decline  occurs, the  put options  will permit a
Series to sell the securities at the exercise price, or to close out the options
at a profit. By using put options in  this way, a Series will reduce any  profit
it might otherwise have realized in the underlying security by the amount of the
premium paid for the put option and by transaction costs.
 
A  Series may purchase call options to hedge against an increase in the price of
securities that  the  Series  anticipates  purchasing in  the  future.  If  such
increase  occurs,  the  call  option  will permit  the  Series  to  purchase the
securities at the exercise price, or to  close out the options at a profit.  The
premium  paid for  the call  option plus any  transaction costs  will reduce the
benefit, if any, realized by a Series  upon exercise of the option, and,  unless
the  price of the underlying security  rises sufficiently, the option may expire
worthless to the Series.
 
In certain instances, the Emerging Growth Series and the Strategic Fixed  Income
Series  may enter  into options  on U.S.  Treasury securities  which provide for
periodic adjustment of the  strike price and may  also provide for the  periodic
adjustment  of the premium during the term of each such option. Like other types
of options, these transactions, which may  be referred to as "reset" options  or
"adjustable  strike" options, grant the purchaser  the right to purchase (in the
case   of   a   "call")    or   sell   (in   the    case   of   a   "put"),    a
 
                                       7
<PAGE>
specified  type and series of U.S. Treasury security  at any time up to a stated
expiration date (or, in certain instances,  on such date). In contrast to  other
types  of options, however,  the price at  which the underlying  security may be
purchased or sold  under a  "reset" option  is determined  at various  intervals
during  the  term of  the option,  and  such price  fluctuates from  interval to
interval based on changes in the market  value of the underlying security. As  a
result,  the strike price of  a "reset" option, at the  time of exercise, may be
less advantageous to the Series than if  the strike price had been fixed at  the
initiation  of the option. In addition, the premium paid for the purchase of the
option may be determined at the termination, rather than the initiation, of  the
option.  If the premium is paid at termination, the Series assumes the risk that
(i) the premium may  be less than  the premium which  would otherwise have  been
received  at  the  initiation of  the  option  because of  such  factors  as the
volatility in yield  of the underlying  Treasury security over  the term of  the
option  and adjustments  made to the  strike price  of the option,  and (ii) the
option purchaser  may  default on  its  obligation to  pay  the premium  at  the
termination of the option.
 
OPTIONS  ON STOCK INDICES: Each of the Emerging Growth Series, the Value Series,
the Total Return Series, the Growth With Income Series and the Utilities  Series
may  write (sell) covered call and put options and purchase call and put options
on stock indices. In contrast to an option  on a security, an option on a  stock
index  provides the  holder with  the right  but not  the obligation  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 (i) 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 (ii)  a fixed  "index
multiplier."
 
   
A  Series may  cover call  options on stock  indices by  owning securities whose
price changes, in  the opinion of  the Adviser,  are expected to  be similar  to
those  of the underlying index, or by  having an absolute and immediate right to
acquire such securities without additional cash consideration (or for additional
cash  consideration  held  in  a  segregated  account  by  its  custodian)  upon
conversion  or exchange  of other  securities in  its portfolio.  Where a Series
covers a call  option on  a stock index  through ownership  of securities,  such
securities  may not match the  composition of the index  and, 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. A Series may also cover call
options  on stock indices  by holding a call  on the same index  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  liquid assets  in a  segregated account  with its
custodian. A Series may cover put options on stock indices by maintaining liquid
assets with a value equal to the exercise price in a segregated account with its
custodian, or by holding a put on the same stock index 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 or  where the exercise
price of the put held is less than the exercise price of the put written if  the
difference  is maintained by the Series in liquid assets in a segregated account
with its custodian. Put and call options on stock indices may also be covered in
such other manner  as may be  in accordance with  the rules of  the exchange  on
which,  or the counterparty with which, the option is traded and applicable laws
and regulations.
    
 
A Series  will receive  a  premium from  writing a  put  or call  option,  which
increases  the Series' gross income in  the event the option expires unexercised
or is closed out at  a profit. If the  value of an index  on which a Series  has
written  a call  option falls  or remains  the same,  the Series  will realize a
profit in the form of the  premium received (less transaction costs) that  could
offset  all or a portion of any decline  in the value of the securities it owns.
If the value of the  index rises, however, a Series  will realize a loss in  its
call   option  position,  which  will  reduce  the  benefit  of  any  unrealized
appreciation in the Series' stock investments. By writing a put option, a Series
assumes the risk of a decline in the index. To the extent that the price changes
of securities owned  by a  Series correlate  with changes  in the  value of  the
index,  writing covered put options on indices will increase a Series' losses in
the event of a market  decline, although such losses will  be offset in part  by
the premium received for writing the option.
 
A Series may also purchase put options on stock indices to hedge its investments
against  a decline  in value.  By purchasing a  put option  on a  stock index, a
Series will seek to offset a decline in the value of securities it owns  through
appreciation  of the put option. If the  value of a Series' investments does not
decline as anticipated, or  if the value  of the option  does not increase,  the
Series'  loss will be  limited to the  premium paid for  the option plus related
transaction costs.  The success  of this  strategy will  largely depend  on  the
accuracy  of the correlation between  the changes in value  of the index and the
changes in value of the Series' security holdings.
 
The purchase of call options on stock indices may be used by a Series to attempt
to reduce  the risk  of missing  a broad  market advance,  or an  advance in  an
industry  or market segment, at a time  when the Series holds uninvested cash or
short-term debt securities awaiting investment. When purchasing call options for
this purpose, a Series will also bear the risk of losing all or a portion of the
premium paid if  the value  of the  index does not  rise. The  purchase of  call
options on stock indices when a Series is substantially fully invested is a form
of  leverage, up to the amount of the premium and related transaction costs, and
involves risks of loss and of increased volatility similar to those involved  in
purchasing calls on securities the Fund owns.
 
The  index underlying a stock index option 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  on narrower  market indices,  such as  the Standard  & Poor's  100
Index,  or on indices 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. The composition of the index is changed
periodically.
 
                                       8
<PAGE>
YIELD CURVE OPTIONS: Each of the Value Series, the Total Return Series, the Bond
Series,  the Strategic Fixed Income Series, the World Governments Series and the
High Income  Series  may also  enter  into options  on  the "spread,"  or  yield
differential,  between two fixed income  securities, in transactions referred to
as "yield curve" options. In contrast to  other types of options, a yield  curve
option  is based on the difference  between the yields of designated securities,
rather than the prices of the individual securities, and is settled through cash
payments. Accordingly, a yield curve option is profitable to the holder if  this
differential  widens (in the case of a call)  or narrows (in the case of a put),
regardless of  whether  the yields  of  the underlying  securities  increase  or
decrease.
 
   
Yield  curve  options may  be used  for the  same purposes  as other  options on
securities. Specifically,  a  Series may  purchase  or write  such  options  for
hedging  purposes. For example, a Series may purchase a call option on the yield
spread between two securities, if it owns one of the securities and  anticipates
purchasing  the other security and  wants to hedge against  an adverse change in
the yield spread between the two securities. A Series may also purchase or write
yield curve  options for  other than  hedging purposes  (I.E., in  an effort  to
increase its current income) if, in the judgment of the Adviser, the Series will
be  able  to profit  from  movements in  the spread  between  the yields  of the
underlying securities. The trading of yield  curve options is subject to all  of
the  risks associated with the  trading of other types  of options. In addition,
however, such options  present risk  of loss  even if the  yield of  one of  the
underlying securities remains constant, if the spread moves in a direction or to
an  extent which was  not anticipated. Yield  curve options written  by a Series
will be "covered." A call (or put) option is covered if the Series holds another
call (or put) option on the spread between the same two securities and maintains
in a segregated account with its  custodian cash or cash equivalents  sufficient
to  cover the Series' net liability under  the two options. Therefore, a Series'
liability for  such a  covered option  is generally  limited to  the  difference
between  the amount  of the  Series' liability under  the option  written by the
Series less the value of the option held by the Series. Yield curve options  may
also  be  covered  in  such  other  manner as  may  be  in  accordance  with the
requirements of the counterparty with which the option is traded and  applicable
laws  and  regulations.  Yield  curve options  are  traded  over-the-counter and
because they have been only recently introduced, established trading markets for
these  securities  have  not  yet   developed.  Because  these  securities   are
over-the-counter,  the SEC has  taken the position that  yield curve options are
illiquid and, therefore, together with other illiquid securities, cannot  exceed
a certain percentage of a Series' assets (the "SEC illiquidity ceiling").
    
 
   
The  staff of  the SEC  has taken  the position  that purchased over-the-counter
options and assets used to  cover written over-the-counter options are  illiquid
and,  therefore, cannot exceed the SEC illiquidity ceiling. Although the Adviser
disagrees with this position, the Adviser intends to limit each Series'  writing
of  over-the-counter options in accordance  with the following procedure. Except
as provided below, a Series intends to write over-the-counter options only  with
primary  U.S. Government  securities dealers  recognized by  the Federal Reserve
Bank of New  York. Also, the  contracts which a  Series has in  place with  such
primary  dealers  will  provide  that  the  Series  has  the  absolute  right to
repurchase an option it writes at any time at a price which represents the  fair
market  value,  as  determined in  good  faith through  negotiation  between the
parties, but which  in no event  will exceed  a price determined  pursuant to  a
formula  in  the  contract.  Although  the  specific  formula  may  vary between
contracts with different primary dealers, the formula will generally be based on
a multiple of the premium received by a Series for writing the option, plus  the
amount,  if any,  of the  option's intrinsic  value (I.E.,  the amount  that the
option is in-the-money). The  formula may also include  a factor to account  for
the  difference between the  price of the  security and the  strike price of the
option if the option is written out-of-money. A Series will treat all or a  part
of  the formula price as illiquid for purposes of the SEC illiquidity ceiling. A
Series  may  also  write  over-the-counter  options  with  non-primary  dealers,
including foreign dealers, and will treat the assets used to cover these options
as illiquid for purposes of such SEC illiquidity ceiling.
    
 
FUTURES  CONTRACTS:  Each  of the  Total  Return  Series, the  Bond  Series, the
Strategic Fixed  Income  Series,  the  World  Governments  Series,  the  Limited
Maturity  Series, the High  Income Series and the  Utilities Series may purchase
and sell futures contracts  ("Futures Contracts") on  foreign or domestic  fixed
income  securities or  indices of such  securities. Each of  the Emerging Growth
Series, the Value  Series, the Total  Return Series and  the Growth With  Income
Series  may  purchase and  sell Futures  Contracts on  stock indexes,  while the
Emerging Growth Series,  the Value Series,  the Total Return  Series, the  World
Governments  Series, the Growth  With Income Series,  the Strategic Fixed Income
Series and  the Utilities  Series may  purchase and  sell Futures  Contracts  on
foreign  currencies or indices of foreign currencies. Such investment strategies
will be  used for  hedging purposes  and for  non-hedging purposes,  subject  to
applicable law.
 
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
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 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
 
                                       9
<PAGE>
value  of the  index or instrument  underlying the  Futures Contract fluctuates,
making positions in the Futures Contract more or less valuable - a process known
as "mark-to-market."
 
Purchases or  sales of  stock index  futures contracts  are used  to attempt  to
protect  a Series' current or intended stock investments from broad fluctuations
in stock prices. For example, a Series may sell stock index futures contracts in
anticipation of or during a market decline to attempt to offset the decrease  in
market value of the Series' securities portfolio that might otherwise result. If
such decline occurs, the loss in value of portfolio securities may be offset, in
whole  or part,  by gains on  the futures position.  When a Series  is not fully
invested in the securities market and anticipates a significant market  advance,
it  may purchase  stock index  futures contracts in  order to  gain rapid market
exposure that  may,  in  part or  entirely,  offset  increases in  the  cost  of
securities  that the Series intends to purchase. As such purchases are made, the
corresponding positions in stock index futures contracts will be closed out.  In
a  substantial majority  of these  transactions, the  Series will  purchase such
securities upon termination of  the futures position,  but under unusual  market
conditions, a long futures position may be terminated without a related purchase
of securities.
 
Interest  rate Futures Contracts may be purchased  or sold to attempt to protect
against the effects of  interest rate changes on  a Series' current or  intended
investments in fixed income securities. For example, if a Series owned long-term
bonds and interest rates were expected to increase, that Series might enter into
interest  rate futures contracts  for the sale  of debt securities.  Such a sale
would have much the same effect as  selling some of the long-term bonds in  that
Series'  portfolio.  If  interest rates  did  increase,  the value  of  the debt
securities in  the  portfolio would  decline,  but  the value  of  that  Series'
interest  rate futures contracts would increase  at approximately the same rate,
thereby keeping the net asset value of that Series from declining as much as  it
otherwise would have.
 
Similarly,  if interest  rates were expected  to decline,  interest rate futures
contracts may be purchased to hedge  in anticipation of subsequent purchases  of
long-term  bonds at higher  prices. Since the  fluctuations in the  value of the
interest rate futures contracts should be similar to that of long-term bonds,  a
Series  could protect itself against the effects  of the anticipated rise in the
value of long-term bonds without actually  buying them until the necessary  cash
became  available or the market had stabilized.  At that time, the interest rate
futures contracts could be liquidated and that Series' cash reserves could  then
be  used to buy  long-term bonds on  the cash market.  A Series could accomplish
similar results by  selling bonds with  long maturities and  investing in  bonds
with  short maturities  when interest rates  are expected  to increase. However,
since the  futures market  is  more liquid  than the  cash  market, the  use  of
interest  rate futures contracts as a hedging technique allows a Series to hedge
its interest rate risk without having to sell its portfolio securities.
 
As noted in  the Prospectus,  a Series may  purchase and  sell foreign  currency
futures  contracts for  hedging purposes, to  attempt to protect  its current or
intended  investments  from  fluctuations  in  currency  exchange  rates.   Such
fluctuations  could reduce the dollar  value of portfolio securities denominated
in foreign currencies, or increase the cost of foreign-denominated securities to
be acquired, even if  the value of  such securities in  the currencies in  which
they  are denominated remains constant. A Series may sell futures contracts on a
foreign currency, for  example, where  it holds securities  denominated in  such
currency  and it anticipates a decline in the value of such currency relative to
the dollar. In the  event such decline occurs,  the resulting adverse effect  on
the  value of foreign-denominated securities may be offset, in whole or in part,
by gains on the futures contracts.
 
Conversely, a  Series  could  protect against  a  rise  in the  dollar  cost  of
foreign-denominated securities to be acquired by purchasing futures contracts on
the  relevant currency, which could  offset, in whole or  in part, the increased
cost of  such securities  resulting  from a  rise in  the  dollar value  of  the
underlying  currencies. Where  a Series  purchases futures  contracts under such
circumstances, however,  and the  prices of  securities to  be acquired  instead
decline,  the Series  will sustain  losses on  its futures  position which could
reduce or eliminate the benefits of the reduced cost of portfolio securities  to
be acquired.
 
OPTIONS ON FUTURES CONTRACTS: Each Series that may buy or sell Futures Contracts
(see  "Futures Contracts" above) also  may purchase and write  options to buy or
sell those  Futures  Contracts in  which  it  may invest  ("Options  on  Futures
Contracts").  Such investment strategies  will be used  for hedging purposes and
for non-hedging purposes, subject to applicable law.
 
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  clearinghouse  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 initial and 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  seller  prior  to  expiration  by  effecting  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 a Series on  U.S.
exchanges  are  traded on  the same  contract market  as the  underlying Futures
Contract, and,  like  Futures  Contracts,  are  subject  to  regulation  by  the
Commodities   Futures  Trading  Commission  (the  "CFTC")  and  the  performance
guarantee of  the  exchange  clearinghouse.  In  addition,  Options  on  Futures
Contracts may be traded on foreign exchanges.
 
A  Series may cover the writing of call Options on Futures Contracts (a) through
purchases of  the underlying  Futures  Contract, (b)  through ownership  of  the
instrument, or instruments included in
 
                                       10
<PAGE>
   
the index, underlying the Futures Contract, or (c) through the holding of a call
on  the  same Futures  Contract and  in the  same principal  amount as  the call
written where the exercise price of the call  held (i) is equal to or less  than
the  exercise price  of the call  written or  (ii) is greater  than the exercise
price of the  call written  if the  difference is  maintained by  the Series  in
liquid assets in a segregated account with its custodian. A Series may cover the
writing  of put Options on Futures Contracts (a) through sales of the underlying
Futures Contract, (b) through segregation of liquid assets in an amount equal to
the value  of the  security or  index underlying  the Futures  Contract, or  (c)
through  the holding  of a  put on  the same  Futures Contract  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  or where the
exercise price  of the  put held  is less  than the  exercise price  of the  put
written  if the  difference is maintained  by the  Series in liquid  assets in a
segregated account with its custodian. Put and call Options on Futures Contracts
may also be covered 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. Upon the exercise of a call Option on a Futures Contract written by
a Series, the Series  will be required to  sell the underlying Futures  Contract
which,  if the Series  has covered its  obligation through the  purchase of such
Contract, will serve to liquidate its  futures position. Similarly, where a  put
Option  on a Futures Contract written by  a Series is exercised, the Series will
be required to purchase the underlying Futures Contract which, if the Series has
covered its obligation  through the sale  of such Contract,  will close out  its
futures position.
    
 
The  writing  of  a call  option  on  a Futures  Contract  for  hedging purposes
constitutes a partial hedge against declining prices of the securities or  other
instruments required to be delivered under the terms of the Futures Contract. If
the  futures price at  expiration of the  option is below  the exercise price, a
Series will  retain  the  full  amount  of  the  option  premium,  less  related
transaction  costs, which provides a partial  hedge against any decline that may
have occurred in the Series' portfolio holdings. The writing of a put option  on
a  Futures Contract constitutes a partial hedge against increasing prices of the
securities or other instruments required to be delivered under the terms of  the
Futures  Contract. If the  futures price at  expiration of the  option is higher
than the exercise  price, a Series  will retain  the full amount  of the  option
premium  which provides  a partial  hedge against any  increase in  the price of
securities which the  Series intends  to purchase.  If a  put or  call option  a
Series  has written  is exercised, the  Series will  incur a loss  which will be
reduced by the amount  of the premium  it receives. Depending  on the degree  of
correlation  between changes  in the value  of its portfolio  securities and the
changes in the value  of its futures positions,  a Series' losses from  existing
Options  on Futures  Contracts may  to some  extent be  reduced or  increased by
changes in the value of portfolio securities.
 
The Series  may  purchase Options  on  Futures Contracts  for  hedging  purposes
instead  of purchasing or selling the underlying Futures Contracts. For example,
where a decrease in the value of portfolio securities is anticipated as a result
of a projected market-wide decline or  changes in interest or exchange rates,  a
Series  could,  in  lieu  of selling  Futures  Contracts,  purchase  put options
thereon. In the event that such decrease  occurs, it may be offset, in whole  or
in  part, by a profit on the option.  Conversely, where it is projected that the
value of  securities  to  be  acquired  by  a  Series  will  increase  prior  to
acquisition, due to a market advance or changes in interest or exchange rates, a
Series  could purchase call Options on Futures Contracts, rather than purchasing
the underlying Futures Contracts.
 
   
FORWARD CONTRACTS ON FOREIGN CURRENCY: Each  of the Emerging Growth Series,  the
Value Series, the Research Series, the Total Return Series, the Bond Series, the
Strategic  Fixed Income  Series, the World  Governments Series,  the Growth With
Income Series, the High  Income Series and the  Utilities Series may enter  into
forward  foreign currency exchange contracts for hedging and, in certain Series,
non-hedging purposes (collectively, "Forward Contracts"). Forward Contracts  may
be  used for hedging to attempt to minimize  the risk to the Series from adverse
changes in the relationship between the U.S. dollar and foreign currencies.  The
Series  intend to enter  into Forward Contracts for  hedging purposes similar to
those described above in connection with foreign currency futures contracts.  In
particular, a Forward Contract to sell a currency may be entered into in lieu of
the  sale of a foreign currency futures contract where a Series seeks to protect
against an anticipated  increase in the  exchange rate for  a specific  currency
which  could reduce the dollar value of portfolio securities denominated in such
currency. Conversely, a Series may enter  into a Forward Contract to purchase  a
given  currency to protect against  a projected increase in  the dollar value of
securities denominated in such currency which  the Series intends to acquire.  A
Series  also may enter  into a Forward Contract  in order to  assure itself of a
predetermined  exchange  rate  in  connection  with  a  fixed  income   security
denominated  in  a foreign  currency.  In addition,  the  Series may  enter into
Forward Contracts for "cross hedging" purposes (E.G., the purchase or sale of  a
Forward   Contract  on  one  type  of  currency,  as  a  hedge  against  adverse
fluctuations in the value of a second type of currency).
    
 
   
If a hedging transaction in Forward Contracts is successful, the decline in  the
value  of portfolio securities  or other assets  or the increase  in the cost of
securities or other assets to  be acquired may be offset,  at least in part,  by
profits  on the  Forward Contract. Nevertheless,  by entering  into such Forward
Contracts, a Series may be required to  forego all or a portion of the  benefits
which  otherwise could have  been obtained from  favorable movements in exchange
rates or natural resources prices. The Series do not intend, in most  instances,
to  hold Forward Contracts entered into until maturity, at which time they would
be required to deliver or accept  delivery of the underlying currency, but  will
usually  seek  to  close  out  positions  in  such  contracts  by  entering into
offsetting transactions, which will serve to fix a Series' profit or loss  based
upon  the  value of  the contracts  at  the time  the offsetting  transaction is
executed.
    
 
The Series may also enter into transactions in Forward Contracts for other  than
hedging  purposes,  which presents  greater profit  potential but  also involves
increased risk. For  example, a  Series may  purchase a  given foreign  currency
through a Forward Contract if, in the judgment of the Adviser, the value of such
currency is expected to rise relative to the U.S. dollar. Conversely, the Series
may  sell the currency through  a Forward Contract if  the Adviser believes that
its value will decline relative to the dollar.
 
                                       11
<PAGE>
A Series  entering  into  such  transactions  will  profit  if  the  anticipated
movements  in foreign  currency exchange rates  occurs, which  will increase its
gross income. Where exchange rates do not move in the direction or to the extent
anticipated, however, the Series may sustain losses, which will reduce its gross
income. Such transactions, therefore, could be considered speculative and  could
involve significant risk of loss.
 
   
Each Series has established procedures consistent with statements by the SEC and
its  staff  regarding  the use  of  Forward Contracts  by  registered investment
companies, which require the use of segregated assets or "cover " in  connection
with  the purchase and sale  of such contracts. In  those instances in which the
Series satisfies  this  requirement  through  segregation  of  assets,  it  will
maintain, in a segregated account, liquid assets, which will be marked to market
on  a daily  basis, in  an amount equal  to the  value of  its commitments under
Forward Contracts.  While these  contracts are  not presently  regulated by  the
CFTC, the CFTC may in the future assert authority to regulate Forward Contracts.
In  such event, the Series'  ability to utilize Forward  Contracts in the manner
set forth above may be restricted.
    
 
OPTIONS ON FOREIGN  CURRENCIES: Each of  the Emerging Growth  Series, the  Value
Series,  the Total  Return Series, the  Bond Series, the  Strategic Fixed Income
Series, the World Governments  Series, the Growth With  Income Series, the  High
Income Series and the Utilities Series may purchase and write options on foreign
currencies  for hedging purposes  in a manner  similar to that  in which futures
contracts on foreign  currencies, or  Forward Contracts, will  be utilized.  For
example,  a decline in the dollar value of a foreign currency in which portfolio
securities are denominated will reduce the dollar value of such securities, even
if their value  in the foreign  currency remains constant.  In order to  protect
against  such diminutions  in the  value of  portfolio securities,  a Series may
purchase put options on the foreign currency. If the value of the currency  does
decline, the Series will have the right to sell such currency for a fixed amount
in  dollars and will thereby offset, in whole in part, the adverse effect on its
portfolio which otherwise would have resulted.
 
Conversely, where a rise in the dollar  value of a currency in which  securities
to be acquired are denominated is projected, thereby increasing the cost of such
securities,  the Series may purchase call  options thereon. The purchase of such
options could offset, at least partially,  the effects of the adverse  movements
in  exchange  rates. As  in the  case of  other types  of options,  however, the
benefit to a Series deriving from purchases of foreign currency options will  be
reduced by the amount of the premium and related transaction costs. In addition,
where  currency exchange  rates do not  move in  the direction or  to the extent
anticipated, a Series could sustain  losses on transactions in foreign  currency
options  which would require  it to forego a  portion or all  of the benefits of
advantageous changes in such rates.
 
A Series may write options on foreign  currencies for the same types of  hedging
purposes.  For example,  where the  Series anticipates  a decline  in the dollar
value of foreign-denominated securities due to adverse fluctuations in  exchange
rates  it could, instead of purchasing a put  option, write a call option on the
relevant currency. If the expected decline  occurs, the option will most  likely
not  be exercised, and the  diminution in value of  portfolio securities will be
offset by the amount of the premium received.
 
Similarly, instead of purchasing a call  option to hedge against an  anticipated
increase in the dollar cost of securities to be acquired, a Series could write a
put  option  on  the  relevant  currency which,  if  rates  move  in  the manner
projected, will expire unexercised and allow the Series to hedge such  increased
cost  up to  the amount of  the premium.  Foreign currency options  written by a
Series will generally be covered  in a manner similar  to the covering of  other
types of options. As in the case of other types of options, however, the writing
of  a foreign  currency option will  constitute only  a partial hedge  up to the
amount of the premium, and only if rates move in the expected direction. If this
does not occur, the option  may be exercised and a  Series would be required  to
purchase  or sell the underlying  currency at a loss which  may not be offset by
the amount of the premium. Through the writing of options on foreign currencies,
a Series also may be required to forego  all or a portion of the benefits  which
might otherwise have been obtained from favorable movements in exchange rates.
 
ADDITIONAL RISK FACTORS:
OPTIONS, FUTURES AND FORWARD TRANSACTIONS
 
RISK  OF IMPERFECT CORRELATION OF HEDGING  INSTRUMENTS WITH A SERIES' PORTFOLIO.
The Series' ability effectively  to hedge all or  a portion of their  portfolios
through   transactions  in  options,  Futures   Contracts,  Options  on  Futures
Contracts, Forward Contracts  and options  on foreign currencies  depend on  the
degree  to which price movements in the underlying index or instrument correlate
with price movements in the relevant  portion of the Series' portfolios. In  the
case  of futures and options based on an index, the portfolio will not duplicate
the components of the  index, and in  the case of futures  and options on  fixed
income  securities, the portfolio  securities which are being  hedged may not be
the same  type  of obligation  underlying  such  contract. The  use  of  Forward
Contracts for "cross hedging" purposes may involve greater correlation risks. As
a  result, the correlation probably will  not be exact. Consequently, the Series
bear the risk that the price of  the portfolio securities being hedged will  not
move in the same amount or direction as the underlying index or obligation.
 
For  example, if  a Series  purchases a  put option  on an  index and  the index
decreases less  than  the value  of  the  hedged securities,  the  Series  would
experience  a loss which is not completely offset  by the put option. It is also
possible that  there  may  be  a  negative  correlation  between  the  index  or
obligation  underlying an option or  Futures Contract in which  the Series has a
position and the portfolio securities the  Series is attempting to hedge,  which
could  result in  a loss on  both the  portfolio and the  hedging instrument. In
addition, a Series may enter into  transactions in Forward Contracts or  options
on  foreign  currencies in  order  to hedge  against  exposure arising  from the
currencies underlying such instruments.  In such instances,  the Series will  be
subject  to the additional risk of  imperfect correlation between changes in the
value of the currencies underlying such  forwards or options and changes in  the
value of the currencies being hedged.
 
                                       12
<PAGE>
It  should be noted that  stock index futures contracts  or options based upon a
narrower index of securities, such as those of a particular industry group,  may
present greater risk than options or futures based on a broad market index. This
is  due to  the fact  that a  narrower index  is more  susceptible to  rapid and
extreme fluctuations as a result  of changes in the value  of a small number  of
securities. Nevertheless, where a Series enters into transactions in options, or
futures  on narrowly-based indexes for hedging  purposes, movements in the value
of the index  should, if  the hedge is  successful, correlate  closely with  the
portion of the Series' portfolio or the intended acquisitions being hedged.
 
The  trading of  Futures Contracts,  options and  Forward Contracts  for hedging
purposes entails the additional risk of imperfect correlation between  movements
in  the  futures  or option  price  and the  price  of the  underlying  index or
obligation. The anticipated spread  between the prices may  be distorted due  to
the  differences in  the nature  of the  markets such  as differences  in margin
requirements, the liquidity of such markets and the participation of speculators
in the  options,  futures  and  forward markets.  In  this  regard,  trading  by
speculators   in  options,  futures  and  Forward  Contracts  has  in  the  past
occasionally  resulted  in  market  distortions,  which  may  be  difficult   or
impossible to predict, particularly near the expiration of such contracts.
 
The  trading of Options on Futures Contracts  also entails the risk that changes
in the value of the underlying Futures Contracts will not be fully reflected  in
the  value of the option. The  risk of imperfect correlation, however, generally
tends to diminish  as the maturity  date of the  Futures Contract or  expiration
date of the option approaches.
 
Further,  with  respect  to options  on  securities, options  on  stock indexes,
options on currencies and Options on  Futures Contracts, the Series are  subject
to  the risk of market  movements between the time  that the option is exercised
and the time of  performance thereunder. This could  increase the extent of  any
loss suffered by a Series in connection with such transactions.
 
In  writing a covered  call option on  a security, index  or futures contract, a
Series also incurs the risk that changes in the value of the instruments used to
cover the position will not correlate closely  with changes in the value of  the
option  or underlying index or instrument. For  example, where a Series covers a
call option written  on a stock  index through segregation  of securities,  such
securities may not match the composition of the index, and the Series may not be
fully  covered. As a result, the Series could  be subject to risk of loss in the
event of adverse market movements.
 
The writing of  options on securities,  options on stock  indexes or Options  on
Futures  Contracts constitutes only a partial  hedge against fluctuations in the
value of a Series' portfolio.  When a Series writes  an option, it will  receive
premium  income in return for  the holder's purchase of  the right to acquire or
dispose of  the underlying  obligation. In  the  event that  the price  of  such
obligation does not rise sufficiently above the exercise price of the option, in
the  case of a call, or fall below the exercise price, in the case of a put, the
option will  not be  exercised and  the Series  will retain  the amount  of  the
premium,  less related transaction costs, which  will constitute a partial hedge
against any decline that may have occurred in the Series' portfolio holdings  or
any increase in the cost of the instruments to be acquired.
 
Where  the price of the underlying obligation moves sufficiently in favor of the
holder to warrant exercise of the option, however, and the option is  exercised,
the Series will incur a loss which may only be partially offset by the amount of
the  premium  it received.  Moreover,  by writing  an  option, a  Series  may be
required to forego the benefits which might otherwise have been obtained from an
increase in the value of  portfolio securities or other  assets or a decline  in
the value of securities or assets to be acquired.
 
In  the event of the occurrence of any of the foregoing adverse market events, a
Series' overall return may be  lower than if it had  not engaged in the  hedging
transactions.
 
Those  Series  that may  enter transactions  in options  (except for  Options on
Foreign Currencies), Futures Contracts, Options on Futures Contracts and Forward
Contracts for  hedging  purposes  may  also enter  into  such  transactions  for
non-hedging  purposes.  Non-hedging  transactions  in  such  investments involve
greater risks and may result in losses  which may not be offset by increases  in
the  value of portfolio securities  or declines in the  cost of securities to be
acquired. The  Series  will  only  write covered  options,  such  that  cash  or
securities  necessary to  satisfy an option  exercise will be  segregated at all
times, unless the option is covered 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, the  method of covering an  option employed by  a
Series  may not  fully protect it  against risk of  loss and, in  any event, the
Series could suffer losses on the option  position which might not be offset  by
corresponding  portfolio gains. Entering into transactions in Futures Contracts,
Options on  Futures  Contracts and  Forward  Contracts for  other  than  hedging
purposes could expose the Series to significant risk of loss if foreign currency
exchange rates do not move in the direction or to the extent anticipated.
 
With respect to the writing of straddles on securities, a Series incurs the risk
that  the price of the  underlying security will not  remain stable, that one of
the options written will be  exercised and that the  resulting loss will not  be
offset  by the  amount of the  premiums received.  Such transactions, therefore,
create an  opportunity for  increased  return by  providing  a Series  with  two
simultaneous  premiums on the same security,  but involve additional risk, since
the Series may  have an option  exercised against it  regardless of whether  the
price of the security increases or decreases.
 
RISK  OF A  POTENTIAL LACK OF  A LIQUID  SECONDARY MARKET. Prior  to exercise or
expiration, a futures or option position can only be terminated by entering into
a closing purchase  or sale transaction.  This requires a  secondary market  for
such  instruments on the  exchange on which the  initial transaction was entered
into. While the  Series will  enter into options  or futures  positions only  if
there  appears  to  be a  liquid  secondary  market therefor,  there  can  be no
assurance that such  a market  will exist for  any particular  contracts at  any
specific  time. In that  event, it may not  be possible to  close out a position
held by a  Series, and  the Series  could be required  to purchase  or sell  the
instrument  underlying  an option,  make or  receive a  cash settlement  or meet
ongoing variation margin requirements. Under  such circumstances, if the  Series
has insufficient
 
                                       13
<PAGE>
cash  available to meet  margin requirements, it will  be necessary to liquidate
portfolio securities or other assets at a time when it is disadvantageous to  do
so.  The inability to close out  options and futures positions, therefore, could
have an  adverse  impact on  the  Series'  ability effectively  to  hedge  their
portfolios, and could result in trading losses.
 
The  liquidity of a secondary market in a Futures Contract or option thereon may
be adversely  affected  by  "daily price  fluctuation  limits,"  established  by
exchanges,  which limit  the amount  of fluctuation in  the price  of a contract
during a  single trading  day. Once  the daily  limit has  been reached  in  the
contract,  no  trades may  be entered  into at  a price  beyond the  limit, thus
preventing the liquidation  of open  futures or option  positions and  requiring
traders  to make additional margin  deposits. Prices have in  the past moved the
daily limit on a number of consecutive trading days.
 
The trading of  Futures Contracts and  options is  also subject to  the risk  of
trading  halts,  suspensions,  exchange  or  clearinghouse  equipment  failures,
government intervention,  insolvency of  a brokerage  firm or  clearinghouse  or
other  disruptions  of normal  trading activity,  which could  at times  make it
difficult or impossible  to liquidate  existing positions or  to recover  excess
variation margin payments.
 
MARGIN.  Because  of low  initial margin  deposits  made upon  the opening  of a
futures or forward  position and  the writing  of an  option, such  transactions
involve  substantial leverage.  As a result,  relatively small  movements in the
price of the  contract can  result in  substantial unrealized  gains or  losses.
Where  a Series enters  into such transactions for  hedging purposes, any losses
incurred in connection therewith should, if the hedging strategy is  successful,
be offset, in whole or in part, by increases in the value of securities or other
assets  held by  the Series or  decreases in  the prices of  securities or other
assets  the  Series  intends  to  acquire.  Where  a  Series  enters  into  such
transactions for other than hedging purposes, the margin requirements associated
with such transactions could expose the Series to greater risk.
 
TRADING  AND  POSITION LIMITS.  The exchange  on which  futures and  options are
traded may impose limitations governing the  maximum number of positions on  the
same  side of the market and involving  the same underlying instrument which may
be held by a  single investor, whether  acting alone or  in concert with  others
(regardless  of  whether  such  contracts  are held  on  the  same  or different
exchanges or held  or written in  one or more  accounts or through  one or  more
brokers).  Further, the CFTC  and the various  contract markets have established
limits referred to as "speculative position  limits" on the maximum net long  or
net  short position which any person may hold or control in a particular futures
or option contract. An exchange may order the liquidation of positions found  to
be  in  violation  of  these  limits  and  it  may  impose  other  sanctions  or
restrictions. The  Adviser does  not  believe that  these trading  and  position
limits will have any adverse impact on the strategies for hedging the portfolios
of the Series.
 
RISKS  OF OPTIONS ON FUTURES CONTRACTS. The amount of risk a Series assumes when
it purchases an Option on a Futures Contract is the premium paid for the option,
plus related transaction  costs. In order  to profit from  an option  purchased,
however,  it  may be  necessary  to exercise  the  option and  to  liquidate the
underlying Futures  Contract, subject  to the  risks of  the availability  of  a
liquid  offset market  described herein.  The writer of  an Option  on a Futures
Contract is subject  to the risks  of commodity futures  trading, including  the
requirement  of initial and variation margin payments, as well as the additional
risk that movements in the price of the option may not correlate with  movements
in the price of the underlying security, index, currency or Futures Contract.
 
RISKS  OF  TRANSACTIONS  RELATED  TO  FOREIGN  CURRENCIES  AND  TRANSACTIONS NOT
CONDUCTED ON  U.S.  EXCHANGES.  Transactions in  Forward  Contracts  on  foreign
currencies,   as  well  as  futures  and   options  on  foreign  currencies  and
transactions  executed  on  foreign  exchanges,  are  subject  to  all  of   the
correlation,  liquidity and  other risks  outlined above.  In addition, however,
such transactions  are subject  to the  risk of  governmental actions  affecting
trading  in or the  prices of currencies underlying  such contracts, which could
restrict or eliminate trading and could have a substantial adverse effect on the
value of positions held by a Series. Further, the value of such positions  could
be  adversely  affected by  a  number of  other  complex political  and economic
factors applicable to the countries issuing the underlying currencies.
 
Further, unlike  trading  in  most  other types  of  instruments,  there  is  no
systematic  reporting  of  last sale  information  with respect  to  the foreign
currencies underlying contracts thereon. As a result, the available  information
on  which trading systems will be based may not be as complete as the comparable
data on which a Series makes investment and trading decisions in connection with
other transactions. Moreover, because the  foreign currency market is a  global,
24-hour market, events could occur in that market which will not be reflected in
the  forward, futures or options market  until the following day, thereby making
it more difficult for the Series to respond to such events in a timely manner.
 
Settlements of  exercises  of  over-the-counter  Forward  Contracts  or  foreign
currency  options generally must occur within the country issuing the underlying
currency, which in  turn requires  traders to accept  or make  delivery of  such
currencies  in conformity with any U.S.  or foreign restrictions and regulations
regarding the maintenance of foreign banking relationships, fees, taxes or other
charges.
 
Unlike transactions  entered  into  by  the  Series  in  Futures  Contracts  and
exchange-traded  options, options  on foreign currencies,  Forward Contracts and
over-the-counter options  on  securities  are not  traded  on  contract  markets
regulated  by  the  CFTC or  (with  the  exception of  certain  foreign currency
options) the SEC. To the contrary, such instruments are traded through financial
institutions acting as market-makers, although foreign currency options are also
traded on certain national securities exchanges, such as the Philadelphia  Stock
Exchange  and the Chicago Board Options  Exchange, subject to SEC regulation. In
an over-the-counter trading  environment, many  of the  protections afforded  to
exchange  participants will  not be available.  For example, there  are no daily
price fluctuation limits, and adverse market movements could therefore  continue
to  an unlimited  extent over  a period  of time.  Although the  purchaser of an
option cannot lose more than the amount of the premium plus related  transaction
costs,  this entire  amount could  be lost.  Moreover, the  option writer  and a
trader of Forward Contracts
 
                                       14
<PAGE>
could lose amounts substantially in excess of their initial investments, due  to
the margin and collateral requirements associated with such positions.
 
In  addition,  over-the-counter transactions  can only  be  entered into  with a
financial institution willing  to take  the opposite  side, as  principal, of  a
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 a Series could be required to retain options
purchased or  written,  or  Forward  Contracts  entered  into,  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  clearinghouse, and a 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. A
Series will enter into an  over-the-counter transaction only with parties  whose
creditworthiness has been reviewed and found satisfactory by the Adviser.
 
Options  on securities, options on stock  indexes, Futures Contracts, Options on
Futures Contracts and options on foreign  currencies may be traded on  exchanges
located in foreign countries. Such transactions may not be conducted in the same
manner  as those entered into on U.S. exchanges, and may be subject to different
margin, exercise, settlement or expiration procedures. As a result, many of  the
risks  of  over-the-counter  trading  may be  present  in  connection  with such
transactions.
 
Options on foreign currencies traded on national securities exchanges are within
the jurisdiction of the SEC, as  are other securities traded on such  exchanges.
As  a result, many of the protections provided to traders on organized exchanges
will be available with respect to such transactions. In particular, all  foreign
currency  option positions  entered into on  a national  securities exchange are
cleared and guaranteed by the Options Clearing Corporation (the "OCC"),  thereby
reducing the risk of counterparty default. Further, a liquid secondary market in
options  traded on a national securities  exchange may be more readily available
than  in  the  over-the-counter  market,  potentially  permitting  a  Series  to
liquidate  open positions  at a  profit prior to  exercise or  expiration, or to
limit losses in the event of adverse market movements.
 
The purchase and sale of  exchange-traded foreign currency options, however,  is
subject  to the risks of the availability of a liquid secondary market described
above, as well  as the risks  regarding adverse market  movements, margining  of
options   written,  the  nature   of  the  foreign   currency  market,  possible
intervention by governmental authorities and the effects of other political  and
economic  events.  In addition,  exchange-traded  options on  foreign currencies
involve certain risks not presented by the over-the-counter market. For example,
exercise and settlement  of such options  must be made  exclusively through  the
OCC, which has established banking relationships in applicable foreign countries
for  this  purpose. As  a result,  the OCC  may, if  it determines  that foreign
governmental restrictions  or  taxes would  prevent  the orderly  settlement  of
foreign  currency option exercises, or would result  in undue burdens on the OCC
or its clearing member,  impose special procedures  on exercise and  settlement,
such  as technical changes in the mechanics  of delivery of currency, the fixing
of dollar settlement prices or prohibitions on exercise.
 
POLICIES ON THE USE  OF FUTURES AND  OPTIONS ON FUTURES  CONTRACTS. In order  to
assure  that the Series will not be deemed to be a "commodity pool" for purposes
of the Commodity  Exchange Act, regulations  of the CFTC  require that a  Series
enter  into transactions in  Futures Contracts and  Options on Futures Contracts
only (i) for  BONA FIDE hedging  purposes (as defined  in CFTC regulations),  or
(ii)  for non-hedging purposes,  provided that the  aggregate initial margin and
premiums on such  non-hedging positions does  not exceed 5%  of the  liquidation
value  of  the Series'  assets. In  addition,  the Series  must comply  with the
requirements  of  various  state  securities   laws  in  connection  with   such
transactions.
 
Each Series has adopted the additional restriction that it will not enter into a
Futures  Contract if, immediately thereafter, the  value of securities and other
obligations underlying all such Futures Contracts would exceed 50% of the  value
of  such Series' total assets. Moreover, a Series will not purchase put and call
options if as a  result more than 5%  of its total assets  would be invested  in
such options.
 
When a Series purchases a Futures Contract, an amount of cash or securities will
be  deposited in  a segregated  account with  the Series  custodian so  that the
amount so segregated will at all times equal the value of the Futures  Contract,
thereby insuring that the leveraging effect of such futures is minimized.
 
RISKS OF INVESTING IN LOWER RATED BONDS
 
Each  of the Emerging Growth Series, the  Value Series, the Research Series, the
Total Return Series, the Bond Series, the Limited Maturity Series, the Strategic
Fixed Income Series, the High Income Series and the Utilities Series may  invest
in  fixed  income  securities  rated  Baa  by  Moody's  Investors  Service, Inc.
("Moody's") or  BBB by  Standard  & Poor's  Ratings  Services ("S&P")  or  Fitch
Investors  Service,  Inc.  ("Fitch") and  comparable  unrated  securities. These
securities, while  normally  exhibiting  adequate  protection  parameters,  have
speculative   characteristics  and  changes  in  economic  conditions  or  other
circumstances are more likely to lead  to a weakened capacity to make  principal
and interest payments than in the case of higher grade fixed income securities.
 
Each  of these Series  (except the Limited  Maturity Series) may  also invest in
fixed income securities rated Ba  or lower by Moody's or  BB or lower by S&P  or
Fitch  and comparable unrated securities (commonly known as "junk bonds") to the
extent described in the  Prospectus. No minimum rating  standard is required  by
the  Series. These  securities are  considered speculative  and, while generally
providing greater  income  than investments  in  higher rated  securities,  will
involve  greater  risk of  principal and  income  (including the  possibility of
default or bankruptcy of the issuers of such securities) and may involve greater
volatility of  price  (especially  during periods  of  economic  uncertainty  or
change) than securities in the
 
                                       15
<PAGE>
higher rating categories and because yields vary over time, no specific level of
income  can  ever  be assured.  These  lower  rated high  yielding  fixed income
securities generally  tend to  reflect  economic changes  (and the  outlook  for
economic  growth),  short-term  corporate  and  industry  developments  and  the
market's perception of their credit quality (especially during times of  adverse
publicity)  to  a  greater  extent  than  higher  rated  securities  which react
primarily to fluctuations in the general level of interest rates (although these
lower rated fixed  income securities are  also affected by  changes in  interest
rates).  In the past, economic downturns or  an increase in interest rates have,
under certain circumstances, caused a higher incidence of default by the issuers
of these securities  and may  do so  in the future,  especially in  the case  of
highly  leveraged issuers.  The prices for  these securities may  be affected by
legislative and regulatory developments. The market for these lower rated  fixed
income  securities may be less liquid than the market for investment grade fixed
income securities. Furthermore,  the liquidity of  these lower rated  securities
may  be affected by the market's  perception of their credit quality. Therefore,
the Adviser's  judgment  may at  times  play a  greater  role in  valuing  these
securities  than in the case of investment grade fixed income securities, and it
also may be more difficult during times of certain adverse market conditions  to
sell  these lower rated securities to meet  redemption requests or to respond to
changes in the market.
 
While the  Adviser may  refer to  ratings issued  by established  credit  rating
agencies,  it is not the Series' policy to rely exclusively on ratings issued by
these rating agencies, but rather to supplement such ratings with the  Adviser's
own  independent and ongoing review of credit  quality. To the extent the Series
invests in  these lower  rated  securities, the  achievement of  its  investment
objectives  may be more dependent  on the Adviser's own  credit analysis than in
the case of a  fund investing in higher  quality fixed income securities.  These
lower  rated securities  may also include  zero coupon  bonds, deferred interest
bonds and PIK bonds.
 
FOREIGN SECURITIES
 
The Limited  Maturity  Series  may invest  in  dollar-denominated  foreign  debt
securities.  The Money Market Series may invest in dollar-denominated securities
of foreign issuers and in  dollar-denominated securities of foreign branches  of
U.S.  banks,  such  as  negotiable certificates  of  deposit  (Eurodollars). The
remaining Series  may invest  in dollar-denominated  and non  dollar-denominated
foreign  securities.  As  discussed  in  the  Prospectus,  investing  in foreign
securities generally  represents a  greater  degree of  risk than  investing  in
domestic  securities due to  possible exchange rate  fluctuations, less publicly
available information, more volatile  markets, less securities regulation,  less
favorable  tax provisions, war or expropriation.  As a result of its investments
in foreign securities, a  Series may receive interest  or dividend payments,  or
the  proceeds  of  the sale  or  redemption  of such  securities,in  the foreign
currencies  in   which   such   securities  are   denominated.   Under   certain
circumstances,  such as where the Adviser  believes that the applicable exchange
rate is  unfavorable at  the time  the currencies  are received  or the  Adviser
anticipates, for any other reason, that the exchange rate will improve, a Series
may  hold such currencies for an indefinite period of time. While the holding of
currencies will permit a Series to take advantage of favorable movements in  the
applicable  exchange rate, such strategy also exposes the Series to risk of loss
if exchange rates  move in  a direction adverse  to the  Series' position.  Such
losses  could reduce any profits or increase  any losses sustained by the Series
from the sale or redemption of securities  and could reduce the dollar value  of
interest or dividend payments received.
 
AMERICAN DEPOSITARY RECEIPTS
 
Each  of the  Series (except  the Limited Maturity  Series and  the Money Market
Series)  may  invest  in  American   Depositary  Receipts  ("ADRs")  which   are
certificates  issued  by a  U.S.  depositary (usually  a  bank) and  represent a
specified quantity of shares of an  underlying non-U.S. stock on deposit with  a
custodian  bank as collateral. ADRs may be sponsored or unsponsored. A sponsored
ADR is  issued by  a depository  which has  an exclusive  relationship with  the
issuer  of the  underlying security.  An unsponsored  ADR may  be issued  by any
number of U.S. depositories. A  Series may invest in  either type of ADR.  Under
the  terms  of most  sponsored  arrangements, depositaries  agree  to distribute
notices  of  shareholder  meetings  and  voting  instructions,  and  to  provide
shareholder  communications  and other  information to  the  ADR holders  at the
request of  the  issuer  of  the deposited  securities.  The  depositary  of  an
unsponsored  ADR,  on  the other  hand,  is  under no  obligation  to distribute
shareholder communications received from the issuer of the deposited  securities
or  to pass  through voting rights  to ADR  holders in respect  of the deposited
securities. Although the U.S. investor  holds a substitute receipt of  ownership
rather than direct stock certificates, the use of the depositary receipts in the
United States can reduce costs and delays as well as potential currency exchange
and  other difficulties. A  Series may purchase securities  in local markets and
direct delivery of these ordinary shares to the local depository of an ADR agent
bank in the foreign country. Simultaneously, the ADR agents create a certificate
which settles at the Series' custodian in  five days. A Series may also  execute
trades on the U.S. markets using existing ADRs. A foreign issuer of the security
underlying an ADR is generally not subject to the same reporting requirements in
the United States as a domestic issuer. Accordingly the information available to
a  U.S.  investor will  be  limited to  the  information the  foreign  issuer is
required to disclose in its own country and  the market value of an ADR may  not
reflect undisclosed material information concerning the issuer of the underlying
security.  ADRs may  also be  subject to exchange  rate risks  if the underlying
foreign securities are denominated in foreign currency.
                              -------------------
 
A Series' limitations, policies and ratings  restrictions are adhered to at  the
time  of purchase or utilization of assets; a subsequent change in circumstances
will not be considered to result in a violation of policy.
 
3.  INVESTMENT RESTRICTIONS
 
Each Series  has adopted  the  following restrictions  which cannot  be  changed
without  the approval of the holders of a majority of the Series' shares (which,
as used in this SAI,  means the lesser of (i)  more than 50% of the  outstanding
shares  of the  Trust or a  Series, as  applicable, or (ii)  67% or  more of the
outstanding shares of the Trust or a Series, as applicable, present at a meeting
if holders of more than 50% of the outstanding shares of the Trust or a  Series,
as applicable, are represented in person or by proxy).
 
                                       16
<PAGE>
Except  for  Investment  Restriction  (1),  these  investment  restrictions  and
policies are adhered  to at the  time of  purchase or utilization  of assets;  a
subsequent  change  in  circumstances will  not  be  considered to  result  in a
violation of any of the restrictions.
 
The Trust, on behalf of any Series, may not:
 
        (1) borrow amounts in excess of 33 1/3% of its assets including  amounts
    borrowed and then only as a temporary measure for extraordinary or emergency
    purposes;
 
        (2)  underwrite securities issued by other persons except insofar as the
    Series may technically be deemed an underwriter under the Securities Act  of
    1933, as amended (the "1933 Act") in selling a portfolio security;
 
        (3)   purchase  or  sell  real  estate  (including  limited  partnership
    interests but  excluding  securities secured  by  real estate  or  interests
    therein  and securities of companies, such as real estate investment trusts,
    which deal in real  estate or interests therein),  interests in oil, gas  or
    mineral leases, commodities or commodity contracts (excluding currencies and
    any type of option, Futures Contracts and Forward Contracts) in the ordinary
    course  of its business. The  Series reserves the freedom  of action to hold
    and to sell real estate, mineral leases, commodities or commodity  contracts
    (including  currencies and any type of option, Futures Contracts and Forward
    Contracts) acquired as a result of the ownership of securities;
 
        (4) issue any senior securities except as permitted by the 1940 Act. For
    purposes of this  restriction, collateral arrangements  with respect to  any
    type of swap, option, Forward Contracts and Futures Contracts and collateral
    arrangements  with respect to initial and variation margin are not deemed to
    be the issuance of a senior security;
 
        (5) make loans  to other persons.  For these purposes,  the purchase  of
    commercial  paper, the  purchase of  a portion  or all  of an  issue of debt
    securities, the lending of  portfolio securities, or  the investment of  the
    Series'  assets in repurchase agreements, shall not be considered the making
    of a loan; or
 
        (6) purchase any securities of an issuer of a particular industry, if as
    a result, more than 25% of its gross assets would be invested in  securities
    of  issuers whose  principal business  activities are  in the  same industry
    (except (i) there  is no limitation  with respect to  obligations issued  or
    guaranteed  by the U.S. Government or its agencies and instrumentalities and
    repurchase agreements  collateralized by  such  obligations, (ii)  the  High
    Income  Series may  invest up  to 40%  of its  gross assets  in each  of the
    electric utility and telephone industries, (iii) the Money Market Series may
    invest up to  75% of its  assets in all  finance companies as  a group,  all
    banks  and bank holding companies as a  group and all utility companies as a
    group when in the opinion of management yield differentials and money market
    conditions suggest  and  when cash  is  available for  such  investment  and
    instruments  are available for purchase which fulfill that Series' objective
    in terms  of quality  and  marketability, (iv)  the Strategic  Fixed  Income
    Series  may invest up to  40% of its assets in  each of the electric utility
    and telephone industries and (v) the  Utilities Series will invest at  least
    25% of its gross assets in the utilities industry).
 
In addition, each Series has adopted the following nonfundamental policies which
may  be changed by the vote of the Trust's Board of Trustees without shareholder
approval. The Trust, on behalf of any Series, will not:
 
        (1) invest  in illiquid  investments,  including securities  subject  to
    legal or contractual restrictions on resale or for which there is no readily
    available  market (e.g.,  trading in the  security is suspended,  or, in the
    case of unlisted securities, where no market exists) if more than 15% of the
    Series' assets (taken at  market value) (10%  of assets in  the case of  the
    Money  Market  Series)  would  be invested  in  such  securities. Repurchase
    agreements maturing in more  than seven days will  be deemed to be  illiquid
    for purposes of the Series' limitation on investment in illiquid securities.
    Securities  that are not registered under the  1933 Act and sold in reliance
    on Rule 144A  thereunder, but  are determined to  be liquid  by the  Trust's
    Board  of Trustees (or its delegee), will not be subject to this 15% (10% in
    the case of the Money Market Series) limitation;
 
        (2) purchase securities issued by any other investment company in excess
    of the amount permitted by the 1940  Act, except when such purchase is  part
    of a plan of merger or consolidation;
 
        (3)  purchase any securities or evidences of interest therein on margin,
    except that the Series may obtain such short-term credit as may be necessary
    for the clearance  of any transaction  and except that  the Series may  make
    margin  deposits  in  connection  with any  type  of  swap,  option, Futures
    Contracts and Forward Contracts;
 
        (4) sell any security which the Series does not own unless by virtue  of
    its ownership of other securities the Series has at the time of sale a right
    to  obtain securities without payment of further consideration equivalent in
    kind and amount to the  securities sold and provided  that if such right  is
    conditional, the sale is made upon the same conditions;
 
        (5)  pledge, mortgage or hypothecate  in excess of 33  1/3% of its gross
    assets. For  purposes  of  this restriction,  collateral  arrangements  with
    respect to any type of swap, option, Futures Contracts and Forward Contracts
    and  payments of initial  and variation margin  in connection therewith, are
    not considered a pledge of assets;
 
        (6) purchase or sell any put or call option or any combination  thereof,
    provided  that this  shall not prevent  the purchase,  ownership, holding or
    sale of (i) warrants where the grantor of the warrants is the issuer of  the
    underlying  securities or (ii)  put or call  options or combinations thereof
    with respect to securities, indices of securities, swaps, foreign currencies
    and Futures Contracts;
 
        (7) invest for the purpose of exercising control or management;
 
                                       17
<PAGE>
        (8)  hold obligations issued or guaranteed  by any one U.S. Governmental
    agency or instrumentality, at the end of any calendar quarter (or within  30
    days thereafter), to the extent such holdings would cause the Series to fail
    to comply with the diversification requirements imposed by Section 817(h) of
    the Internal Revenue Code of 1986, as amended (the "Code"), and the Treasury
    regulations  issued  thereunder  on  segregated  asset  accounts  that  fund
    variable contracts.
 
In addition, as  nonfundamental policies  which may be  changed by  vote of  the
Trust's  Board of Trustees:  (i) each Series,  to the extent  that it invests in
foreign securities, will  be invested  in a  minimum of  five different  foreign
countries  at all  times, provided  that this  minimum is  reduced to  four when
foreign country investments comprise less than 80% of the Series' net assets, to
three when less than 60% of such value, to two when less than 40% of such value,
and to one when less than 20% of such value; (ii) no Series will have more  than
20%  of its  net assets  invested in  securities of  issuers located  in any one
foreign country, provided that  a Series may  have up to 35%  of its net  assets
invested  in securities of issuers located  in Australia, Canada, France, Japan,
the United Kingdom or West Germany; (iii) no Series may borrow amounts in excess
of 10% of its net assets when borrowing for any general purpose or in excess  of
25%  of  net  assets  when  borrowing  as  a  temporary  measure  to  facilitate
redemptions;  and  (iv)  no  Series  may  enter  into  hedging  transactions  by
purchasing   put  and  call  options,  futures  contracts  or  other  derivative
instruments on securities, in an aggregate market value equivalent to more  than
10%  of its total assets.  For purposes of clauses (i)  and (ii) above, ADRs and
European Depositary Receipts shall be deemed to be foreign securities.
 
4.  MANAGEMENT OF THE TRUST
 
The Board of Trustees of the  Trust provides broad supervision over the  affairs
of each Series. MFS is responsible for the investment management of each Series'
assets  and the officers  of the Trust  are responsible for  its operations. The
Trustees and  officers  of the  Trust  are  listed below,  together  with  their
principal  occupations during the past five years. (Their titles may have varied
during that period.)
 
TRUSTEES
 
   
A. KEITH BRODKIN*, Chairman and President (born 8/4/35)
    
Massachusetts Financial Services Company, Chairman.
 
   
NELSON J. DARLING, JR. (born 12/27/20)
    
   
Professional Trustee
    
   
Address: 27 School Street, Boston, Massachusetts
    
 
   
WILLIAM R. GUTOW (born 9/27/41)
    
Private Investor;  Real Estate  Consultant; Capitol  Entertainment  (Blockbuster
Video Franchise), Vice Chairman.
Address: 3102 Maple Avenue, #100, Dallas, Texas
 
OFFICERS
 
   
W. THOMAS LONDON*, Treasurer (born 3/1/44)
    
Massachusetts Financial Services Company, Senior Vice President.
 
   
STEPHEN E. CAVAN*, Secretary and Clerk (born 11/6/53)
    
Massachusetts Financial Services Company, Senior Vice President, General Counsel
and Assistant Secretary.
 
   
JAMES R. BORDEWICK, JR.*, Assistant Secretary (born 3/6/59)
    
   
Massachusetts  Financial Services  Company, Senior Vice  President and Associate
General Counsel.
    
 
   
JAMES O. YOST*, Assistant Treasurer (born 6/12/60)
    
Massachusetts Financial Services Company, Vice President.
- ------------------------
*"Interested persons" (as  defined in  the Investment  Company Act  of 1940,  as
 amended (the "1940 Act")) of the Adviser, whose address is 500 Boylston Street,
 Boston, Massachusetts 02116.
 
Mr.  Brodkin and each officer hold  comparable positions with certain affiliates
of MFS  or  with certain  other  funds  of which  MFS  or a  subsidiary  is  the
investment  adviser or distributor.  Messrs. Brodkin and  Cavan are the Chairman
and the Secretary, respectively, of MFD and hold similar positions with  certain
other MFS affiliates.
 
   
As of March 31, 1997, all Trustees and officers as a group owned less than 1% of
each Series.
    
 
   
Listed  in the chart below are the  name, address and percentage of ownership of
each person of record  or known by  the Trust to own  of record or  beneficially
five percent or more of any Series' outstanding securities as of March 31, 1997.
    
 
   
<TABLE>
<CAPTION>
                                                        % OF
                                                     OUTSTANDING
SERIES                   OWNER & ADDRESS               SHARES
- --------------  ----------------------------------  -------------
<S>             <C>                                 <C>
MFS Emerging    Ameritas Life Insurance Company          13.77%
  Growth        Separate Account VA-2 (Annuity)
  Series        5900 O Street
                Lincoln, NE 68510-2234
                United of Omaha Life Insurance           20.11%
                Company
                Mutual of Omaha Plaza
                Omaha, NE 68175
                Union Central Life Insurance              8.49%
                Company
                Group Annuity
                Mutual Funds -- Station 3
                1876 Waycross Road
                Cincinnati, OH 45240-2899
                Merrill Lynch Life Insurance             11.04%
                Company
                4804 Deer Lake Drive, East
                Jacksonville, FL 32246-6484
                Pruco Life of Arizona                     9.19%
                Flexible Premium Variable Annuity
                Account
                1111 Durham Avenue
                South Plainfield, NJ 07080-2305
                Aetna Life Insurance & Annuity            8.19%
                Company
                151 Farmington Avenue
                Hartford, CT 06156-0001
                CUNA Mutual Life Insurance Company       13.43%
                Variable Annuity Account
                2000 Heritage Way
                Waverly, IA 50677-9202
MFS Value       Aetna Life Insurance & Annuity           35.93%
  Series        Company
                151 Farmington Avenue
                Hartford, CT 06156-0001
                MFS Fund Distributors, Inc.              58.67%
                500 Boylston Street
                Boston, MA 02116-3740
MFS Research    United of Omaha Life Insurance           25.14%
  Series        Company
                Mutual of Omaha Plaza
                Omaha, NE 68175
</TABLE>
    
 
                                       18
<PAGE>
 
   
<TABLE>
<CAPTION>
                                                        % OF
                                                     OUTSTANDING
SERIES                   OWNER & ADDRESS               SHARES
- --------------  ----------------------------------  -------------
<S>             <C>                                 <C>
MFS Research    Merrill Lynch Life Insurance             33.19%
  Series        Company
  (Cont.)       4804 Deer Lake Drive, East
                Jacksonville, FL 32246-6484
                Pruco Life of Arizona                    10.13%
                Flexible Premium Variable Annuity
                Account
                1111 Durham Avenue
                South Plainfield, NJ 07080-2305
                Aetna Life Insurance & Annuity           14.30%
                Company
                151 Farmington Avenue
                Hartford, CT 06156-0001
                Aetna Investment Company of               5.28%
                America
                151 Farmington Avenue
                Hartford, CT 06156-0001
MFS Growth      Union Central Life Insurance             38.83%
  With          Company
  Income        Group Annuity
  Series        Mutual Funds -- Station 3
                1876 Waycross Road
                Cincinnati, OH 45240-2899
                Union Central Life Insurance             56.50%
                Company
                Individual Annuity
                Mutual Funds -- Station 3
                1876 Waycross Road
                Cincinnati, OH 45240-2899
MFS Total       Cigna Variable Annuity                    8.91%
  Return        Separate Account I
  Series        900 Cottage Grove Road
                S-203
                Hartford, Ct 06152-0001
                CG Variable Annuity                      40.14%
                Separate Account II
                900 Cottage Grove Road
                S-204
                Hartford, CT 06152-0001
                United Companies Life Insurance           8.08%
                Company
                Separate Account One
                8545 United Plaza Blvd.
                Baton Rouge, LA 70809-2264
                Aetna Life Insurance & Annuity           24.01%
                Company
                151 Farmington Avenue
                Hartford, CT 06156-0001
                Aetna Investment Company of               8.31%
                America
                151 Farmington Avenue
                Hartford, CT 06156-0001
MFS Utilities   Ameritas Life Insurance Company          55.29%
  Series        Separate Account VA-2 (Annuity)
                5900 O Street
                Lincoln, NE 68510-2252
                CG Variable Annuity                      28.05%
                Separate Account II
                900 Cottage Grove Road
                S-204
                Hartford, CT 06152-0001
MFS High        United of Omaha Life Insurance           73.97%
  Income        Company
  Series        Mutual of Omaha Plaza
                Omaha, NE 68175
                Union Central Life Insurance             12.11%
                Company
                Group Annuity
                Mutual Funds -- Station 3
                1876 Waycross Road
                Cincinnati, OH 45240-2899
                                                        % OF
                                                     OUTSTANDING
SERIES                   OWNER & ADDRESS               SHARES
- --------------  ----------------------------------  -------------
MFS High        Union Central Life Insurance              9.71%
  Income        Company
  Series        Individual Annuity
  (Cont.)       Mutual Funds -- Station 3
                1876 Waycross Road
                Cincinnati, OH 45240-2899
MFS World       CUNA Mutual Life Insurance               43.98%
  Governments   Variable Annuity Account
  Series        2000 Heritage Way
                Waverly, IA 50677-9202
                United of Omaha Life Insurance           32.24%
                Company
                Mutual of Omaha Plaza
                Omaha, NE 68175
MFS Strategic   Massachusetts Financial Services         98.84%
  Fixed Income  Company
  Series        500 Boylston Street
                Boston, MA 02116-3740
MFS Bond        Kansas City Life Insurance Company       52.71%
  Series        Variable Annuity
                P.O. Box 419139
                Kansas City, MO 64141-6139
                MFS Fund Distributors, Inc.              16.19%
                500 Boylston Street
                Boston, MA 02116-3740
                First Citicorp Life Insurance            25.24%
                Company
                Citicorp Plaza
                P.O. Box 7031
                Dover, DE 19903-7031
MFS Limited     MFS Fund Distributors, Inc.              98.31%
  Maturity      500 Boylston Street
  Series        Boston, MA 02116-3740
MFS Money       Citicorp Life Insurance Company          25.81%
  Market        Citicorp Plaza
  Series        P.O. Box 7031
                Dover, DE 19903-7031
                First Citicorp Life Insurance            69.62%
                Company
                Citicorp Plaza
                P.O. Box 7031
                Dover, DE 19903-7031
</TABLE>
    
 
   
The  Trust pays the compensation of  non-interested Trustees (who will receive a
fee of $217 per  year per Series  plus $100 per meeting  and $100 per  committee
meeting   attended  per  Series,  together  with  such  Trustee's  out-of-pocket
expenses).
    
 
   
TRUSTEE COMPENSATION TABLE
    
 
   
<TABLE>
<CAPTION>
                                               TRUSTEE
                                              FEES FROM
                                             EACH SERIES
                                             OTHER THAN
                                              THE VALUE
                                             SERIES, THE
                                               LIMITED
                              TRUSTEE FEES    MATURITY
                                FROM THE     SERIES AND
                              VALUE SERIES       THE         TOTAL
                                 AND THE      STRATEGIC   TRUSTEE FEES
                                 LIMITED        FIXED       FROM THE
                                MATURITY       INCOME     FUND COMPLEX
NAME OF TRUSTEE                SERIES (1)    SERIES (1)       (2)
- ----------------------------  -------------  -----------  ------------
<S>                           <C>            <C>          <C>
A. Keith Brodkin............       N/A           N/A          N/A
Nelson J. Darling...........  $       254    $    1,017   $    25,133
William R. Gutow............          254         1,017        25,133
</TABLE>
    
 
   
NOTES:
    
 
   
(1) For fiscal year ended December 31, 1996.
    
 
                                       19
<PAGE>
   
(2)  For  calendar  year  ended  December  31,  1996.  All  Trustees   receiving
    compensation served as Trustees of 18 funds advised by MFS (having aggregate
    net assets at December 31, 1996 of approximately $696 million).
    
 
The Declaration of Trust provides that the Trust will indemnify its Trustees and
officers against liabilities and expenses incurred in connection with litigation
in  which they may be involved because  of their offices with the Trust, unless,
as to liabilities of  the Trust or its  shareholders, it is finally  adjudicated
that  they  engaged  in  willful misfeasance,  bad  faith,  gross  negligence or
reckless disregard of the duties involved  in their offices, or with respect  to
any  matter, unless it is adjudicated that they did not act in good faith in the
reasonable belief that their actions were in the best interest of the Trust.  In
the  case of settlement, such indemnification will not be provided unless it has
been determined pursuant  to the  Declaration of  Trust, that  such officers  or
Trustees have not engaged in willful misfeasance, bad faith, gross negligence or
reckless disregard of their duties.
 
INVESTMENT ADVISER
 
MFS  and its predecessor organizations have a history of money management dating
from 1924. MFS is a subsidiary of Sun Life of Canada (U.S.), which in turn is  a
wholly owned subsidiary of Sun Life Assurance Company of Canada ("Sun Life").
 
INVESTMENT ADVISORY AGREEMENT
 
   
MFS  manages  the  assets of  each  Series  pursuant to  an  Investment Advisory
Agreement with the Trust  on behalf of  each Series dated as  of April 14,  1994
(the  "Advisory  Agreement"). Under  the  Advisory Agreement,  MFS  provides the
Series with overall investment  advisory services. Subject  to such policies  as
the  Trustees may determine, MFS makes  investment decisions for the Series. For
these services and facilities,  the Adviser receives  an annual management  fee,
computed  and paid  monthly, as  disclosed in  the Prospectus  under the heading
"Management of the Series."
    
In order to  comply with  the expense  limitations of  certain state  securities
commissions,  MFS will reduce its management fee or otherwise reimburse a Series
for any  expenses,  exclusive  of interest,  taxes  and  brokerage  commissions,
incurred by the Series in any fiscal year to the extent such expenses exceed the
most  restrictive of such  state expense limitations.  MFS will make appropriate
adjustments to such reductions and  reimbursements in response to any  amendment
or rescission of the various state requirements.
 
   
For   the  Trust's  fiscal  years  ended  December  31,  1996,  1995  and  1994,
respectively, MFS  received the  following  aggregate fees  and MFS  waived  the
following fees, in whole or in part, for the same periods:
    
 
   
For the fiscal year ended December 31, 1996:
    
   
<TABLE>
<CAPTION>
                              MANAGEMENT FEE   EXPENSES ASSUMED
SERIES(1)                     PAID TO MFS(2)        BY MFS
- ----------------------------  ---------------  -----------------
<S>                           <C>              <C>
Emerging Growth Series......     $ 314,262         $  62,962
Value Series(3).............         3,196            12,079
Research Series.............        92,348            56,859
Growth With Income Series...        30,792            42,658
Total Return Series.........        60,979            87,721
Utilities Series............        39,863            91,877
High Income Series..........        56,169            45,293
 
<CAPTION>
                              MANAGEMENT FEE   EXPENSES ASSUMED
SERIES(1)                     PAID TO MFS(2)        BY MFS
- ----------------------------  ---------------  -----------------
<S>                           <C>              <C>
World Governments Series....       126,898           172,556
Bond Series.................         2,924            40,829
Limited Maturity Series(3)           1,064            12,705
Money Market Series.........           858            46,831
</TABLE>
    
 
- ------------------------------
   
(1)The  Strategic Fixed  Income Series  had not  commenced investment operations
prior to December 31, 1996.
    
   
(2)After any applicable fee reduction.
    
   
(3)For the period from the commencement  of investment operations on August  14,
1996 to December 31, 1996.
    
 
   
For the fiscal year ended December 30, 1995:
    
 
   
<TABLE>
<CAPTION>
                              MANAGEMENT FEE   EXPENSES ASSUMED
SERIES(1)                     PAID TO MFS(2)        BY MFS
- ----------------------------  ---------------  -----------------
<S>                           <C>              <C>
Emerging Growth Series(3)...     $   6,262         $  15,659
Research Series(4)..........         4,424            16,913
Growth With Income
 Series(5)..................           597            16,226
Total Return Series(6)......        10,826            25,092
Utilities Series(6).........         9,376            25,513
High Income Series(4).......         3,996            17,847
World Governments Series....        33,869            43,311
Bond Series(7)..............           247            17,623
Money Market Series(6)......           594            24,976
</TABLE>
    
 
- ------------------------------
   
(1)The  Value Series, the Strategic Fixed Income Series and the Limited Maturity
Series had not commenced investment operations prior to December 31, 1995.
    
   
(2)After any applicable fee reduction.
    
   
(3)For the period  from the commencement  of investment operations  on July  24,
1995 to December 31, 1995.
    
   
(4)For  the period  from the commencement  of investment operations  on July 26,
1995 to December 31, 1995.
    
   
(5)For the period from the commencement  of investment operations on October  9,
1995 to December 31, 1995.
    
   
(6)For  the period from the commencement  of investment operations on January 3,
1995 to December 31, 1995.
    
   
(7)For the period from the commencement of investment operations on October  24,
1995 to December 31, 1995.
    
 
   
For the fiscal year ended December 31, 1994:
    
 
   
<TABLE>
<CAPTION>
                              MANAGEMENT FEE   EXPENSES ASSUMED
SERIES(1)                     PAID TO MFS(2)        BY MFS
- ----------------------------  ---------------  -----------------
<S>                           <C>              <C>
World Governments
 Series(3)..................     $   7,604         $  36,473
</TABLE>
    
 
- ------------------------------
   
(1)The  remaining  Series  had  not  commenced  investment  operations  prior to
December 31, 1994.
    
   
(2)After any applicable fee reduction.
    
   
(3)For the period  from the commencement  of investment operations  on June  14,
1994 to December 31, 1994.
    
 
MFS  pays the compensation of the Trust's officers  and of any Trustee who is an
officer  of  MFS.  MFS  also  furnishes   at  its  own  expense  all   necessary
administrative  services, including office space, equipment, clerical personnel,
investment advisory  facilities, and  all  executive and  supervisory  personnel
necessary  for  managing  each  Series'  investments,  effecting  its  portfolio
transactions and, in general, administering its affairs.
 
The Advisory Agreement  with the  Trust will remain  in effect  until August  1,
1997,  and will continue in effect thereafter with respect to any Series only if
such continuance is  specifically approved  at least  annually by  the Board  of
Trustees  or  by  vote  of a  majority  of  the Series'  shares  (as  defined in
"Investment Restrictions") and, in  either case, by a  majority of the  Trustees
who  are not parties to the Advisory Agreement or interested persons of any such
party. The Advisory  Agreement terminates  automatically if it  is assigned  and
 
                                       20
<PAGE>
may  be  terminated with  respect to  any Series  without penalty  by vote  of a
majority of the Series' shares (as  defined in "Investment Restrictions") or  by
either  party on not more  than 60 days' nor less  than 30 days' written notice.
The Advisory Agreement with respect to  each Series provides that if MFS  ceases
to  serve as the  investment adviser to  the Series, the  Series will change its
name so as to delete the term "MFS"  and that MFS may render services to  others
and  may permit  other fund clients  to use the  term "MFS" in  their names. The
Advisory Agreement also  provides that neither  MFS nor its  personnel shall  be
liable  for any error of judgment or mistake  of law or for any loss arising out
of any investment or for any act or omission in the execution and management  of
the Series, except for willful misfeasance, bad faith or gross negligence in the
performance  of its or their duties or by reason of reckless disregard of its or
their obligations and duties under the Advisory Agreement.
 
   
ADMINISTRATOR
    
 
   
MFS provides  the Series  with  certain administrative  services pursuant  to  a
Master  Administrative  Services  Agreement  dated  March  1,  1997.  Under this
Agreement, MFS provides  the Series with  certain financial, legal,  compliance,
shareholder  communications  and  other administrative  services.  As  a partial
reimbursement for the cost of providing  these services, the Series pays MFS  an
administrative  fee up  to 0.015%  per annum  of the  Series' average  daily net
assets, provided that the  administrative fee is not  assessed on Series  assets
that exceed $3 billion.
    
 
CUSTODIAN
 
Investors Bank & Trust Company (the "Custodian") is the custodian of the Trust's
assets.  The  Custodian's responsibilities  include safekeeping  and controlling
each  Series'  cash  and  securities,  handling  the  receipt  and  delivery  of
securities,  determining  income  and  collecting interest  and  dividends  on a
Series' investments, maintaining books of original entry for portfolio and  fund
accounting  and other required books and accounts, and calculating the daily net
asset value  of shares  of the  Series.  The Custodian  does not  determine  the
investment policies of the Series or decide which securities the Series will buy
or sell. Each Series may, however, invest in securities of the Custodian and may
deal  with the Custodian as principal  in securities transactions. The Custodian
has contracted with MFS for MFS to perform certain accounting functions  related
to  certain transactions for  which the Adviser receives  remuneration on a cost
basis.  State  Street  Bank  and  Trust  Company  serves  as  the  dividend  and
distribution disbursing agent of the Series.
 
SHAREHOLDER SERVICING AGENT
 
MFS  Service Center,  Inc. (the "Shareholder  Servicing Agent"),  a wholly owned
subsidiary of MFS and a registered  transfer agent, is each Series'  shareholder
servicing  agent, pursuant to  a Shareholder Servicing  Agent Agreement with the
Trust on  behalf  of  the Series,  dated  as  of April  14,  1994  (the  "Agency
Agreement"). The Shareholder Servicing Agent's responsibilities under the Agency
Agreement  include administering and performing transfer agent functions and the
keeping of records in connection with  the issuance, transfer and redemption  of
shares  of the Series. For these  services, the Shareholder Servicing Agent will
receive a fee calculated as a percentage  of the average daily net assets at  an
effective  annual rate of  up to 0.035%. In  addition, the Shareholder Servicing
Agent will  be reimbursed  by a  Series  for certain  expenses incurred  by  the
Shareholder Servicing Agent on behalf of the Series. State Street Bank and Trust
Company,  the dividend  and distribution  disbursing agent  for the  Series, has
contracted with  the  Shareholder  Servicing Agent  to  administer  and  perform
certain dividend and distribution disbursing functions for the Series.
 
DISTRIBUTOR
 
MFD,  a  wholly owned  subsidiary  of MFS,  serves  as the  distributor  for the
continuous offering of shares of the Trust pursuant to a Distribution  Agreement
dated as of April 14, 1994 (the "Distribution Agreement").
 
As  agent, MFD currently offers  shares of each Series  on a continuous basis to
the separate  accounts of  Participating Insurance  Companies in  all states  in
which  the Series  or the  Trust may from  time to  time be  registered or where
permitted by  applicable  law.  The Distribution  Agreement  provides  that  MFD
accepts  orders for shares at net asset value  as no sales commission or load is
charged. MFD has made no firm commitment to acquire shares of any Series.
 
The Distribution Agreement will remain in  effect until August 1, 1997 and  will
continue  in effect thereafter only if such continuance is specifically approved
at least annually  by the  Board of Trustees  or by  vote of a  majority of  the
Trust's  shares (as defined in "Investment Restrictions") and in either case, by
a majority of the Trustees who are not parties to such Distribution Agreement or
interested persons  of any  such party.  The Distribution  Agreement  terminates
automatically  if it is assigned and may be terminated without penalty by either
party on not more than 60 days' nor less than 30 days' notice.
 
5.  PORTFOLIO TRANSACTIONS AND BROKERAGE
   COMMISSIONS
 
Specific decisions  to purchase  or sell  securities for  a Series  are made  by
employees  of  MFS, who  are appointed  and supervised  by its  senior officers.
Changes in a Series' investments are reviewed by the Trust's Board of  Trustees.
A  Series' portfolio manager may serve other clients of MFS or any subsidiary of
MFS in a similar capacity.
 
The primary  consideration  in  placing  portfolio  security  transactions  with
broker-dealers  for  execution is  to obtain  and  maintain the  availability of
execution at  the  most  favorable  prices and  in  the  most  effective  manner
possible.  MFS has complete freedom as to  the markets in and the broker-dealers
through which  it seeks  this result.  MFS attempts  to achieve  this result  by
selecting  broker-dealers  to execute  portfolio transactions  on behalf  of the
Series and other clients of MFS  on the basis of their professional  capability,
the  value  and quality  of their  brokerage  services, and  the level  of their
brokerage  commissions.  In  the  case  of  securities,  such  as  fixed  income
securities, which are principally traded in the over-the-counter market on a net
basis  through dealers acting for their own account and not as brokers (where no
stated commissions  are  paid  but  the prices  include  a  dealer's  markup  or
markdown),  MFS normally seeks to deal  directly with the primary market makers,
unless in its  opinion, better prices  are available elsewhere.  In the case  of
securities  purchased from underwriters,  the cost of  such securities generally
includes a  fixed underwriting  commission or  concession. Securities  firms  or
futures  commission merchants may receive  brokerage commissions on transactions
involving options, Futures
 
                                       21
<PAGE>
Contracts and  Options  on  Futures  Contracts and  the  purchase  and  sale  of
underlying  securities  upon  exercise  of  options.  The  brokerage commissions
associated with buying and  selling options may  be proportionately higher  than
those  associated  with  general  securities transactions.  From  time  to time,
soliciting dealer fees are available to MFS on the tender of a Series' portfolio
securities in so-called tender or  exchange offers. Such soliciting dealer  fees
are  in effect recaptured for  the Series by MFS.  At present no other recapture
arrangements are in effect.
 
Under the  Advisory  Agreements  and  as  permitted  by  Section  28(e)  of  the
Securities  Exchange Act of  1934, as amended, MFS  may cause a  Series to pay a
broker-dealer which provides brokerage and research services to MFS an amount of
commission for effecting a securities transaction for a Series in excess of  the
amount  other  broker-dealers  would have  charged  for the  transaction  if MFS
determines in good faith that the  greater commission is reasonable in  relation
to  the value of the  brokerage and research services  provided by the executing
broker-dealer viewed  in  terms of  either  a particular  transaction  or  MFS's
overall  responsibilities to the Series or to its other clients. Not all of such
services are useful or of value in advising a Series.
 
The term "brokerage and  research services" includes advice  as to the value  of
securities,  the  advisability  of  purchasing or  selling  securities,  and the
availability of purchasers  or sellers  of securities;  furnishing analyses  and
reports  concerning issues, industries, securities, economic factors and trends,
portfolio strategy and  the performance  of accounts;  and effecting  securities
transactions  and performing functions incidental  thereto such as clearance and
settlement.
 
Although commissions paid on every transaction will, in the judgment of MFS,  be
reasonable  in  relation  to  the  value  of  the  brokerage  services provided,
commissions exceeding those  which another broker  might charge may  be paid  to
broker-dealers  who  were  selected to  execute  transactions on  behalf  of the
Series' and  MFS's  other  clients  in  part for  providing  advice  as  to  the
availability  of purchasers or  sellers of securities  and services in effecting
securities transactions  and performing  functions  incidental thereto  such  as
clearance and settlement.
 
   
Broker-dealers may be willing to furnish statistical, research and other factual
information  or services  ("Research") to  MFS for  no consideration  other than
brokerage or underwriting  commissions. Securities  may be bought  or sold  from
time  to time through  such broker-dealers on  behalf of a  Series. The Trustees
(together with  the  Trustees of  the  other MFS  Funds)  have directed  MFS  to
allocate a total of $39,100 of commission business from the various MFS Funds to
the  Pershing Division of Donaldson, Lufkin  & Jenrette as consideration for the
annual renewal of certain publications provided by Lipper Analytical  Securities
Corporation  (which provides information useful to the Trustees in reviewing the
relationship between each Fund and MFS).
    
 
The investment management personnel  of MFS attempt to  evaluate the quality  of
Research  provided by brokers. Results of this  effort are sometimes used by MFS
as  a  consideration  in   the  selection  of   brokers  to  execute   portfolio
transactions. However, MFS is unable to quantify the amount of commissions which
will  be  paid as  a result  of such  Research because  a substantial  number of
transactions will be effected through  brokers which provide Research but  which
were selected principally because of their execution capabilities.
 
The  management  fee that  each Series  pays to  MFS  will not  be reduced  as a
consequence of the  receipt of brokerage  and research services  by MFS. To  the
extent  a Series' portfolio  transactions are used to  obtain such services, the
brokerage commissions paid by the Series will exceed those that might  otherwise
be  paid, by an amount which cannot be presently determined. Such services would
be useful and of value  to MFS in serving both  a Series and other clients  and,
conversely,  such services  obtained by the  placement of  brokerage business of
other clients would  be useful to  MFS in  carrying out its  obligations to  the
Series.  While such services are not expected to reduce the expenses of MFS, MFS
would, through use of the services, avoid the additional expenses which would be
incurred if it should attempt to develop comparable information through its  own
staff.
 
   
For  fiscal  year ended  December 31,  1996, the  Emerging Growth  Series, Value
Series, Research  Series, Growth  With Income  Series, Total  Return Series  and
Utilities  Series  paid  brokerage  commissions  of  $110,808,  $2,473, $49,208,
$7,661, $10,035 and $20,924, respectively, on total transactions of $73,634,924,
$1,578,092, $31,609,275, $9,321,266, $9,329,814, and $11,241,156,  respectively.
For  fiscal year ended December 31,  1995, the Emerging Growth Series, Utilities
Series, Total Return Series, Growth With Income Series and Research Series  paid
brokerage  commissions of $9,408, $8,281, $2,571, $191 and $6,332, respectively,
on total  transactions  of  $6,057,384,  $4,450,825,  $2,161,403,  $346,170  and
$4,278,466,  respectively.  Not  all  of  the  Series'  transactions  are equity
security transactions which involve the payment of brokerage commissions. During
the fiscal year ended  December 31, 1996, the  Research Series owned  securities
issued  by Chase Manhattan, Inc.,  which had a value  of $512,000 at fiscal year
end, Growth With Income  Series owned securities issued  by Chase Manhattan  and
Merrill  Lynch, which had  a value of  $60,000 at fiscal  year end, Total Return
Series owned securities issued by Chase Manhattan, Inc., Bank of America, Lehman
Brothers and Nations Bank, which had a value of $375,000 at fiscal year end, and
Bond Series owned  securities issued  by Lehman  Brothers and  Bank of  America,
which  had a  value of $15,000  at fiscal year  end. Each of  these entities are
regular broker dealers of such Series.
    
 
In certain instances there  may be securities which  are suitable for a  Series'
portfolio  as well  as for  that of  one or  more of  the other  clients of MFS.
Investment decisions for a  Series and for  such other clients  are made with  a
view  to achieving their respective investment objectives. It may develop that a
particular security is bought or sold for  only one client even though it  might
be  held  by, or  bought  or sold  for,  other clients.  Likewise,  a particular
security may be bought for  one or more clients when  one or more other  clients
are  selling that same  security. Some simultaneous  transactions are inevitable
when several clients receive investment advice from the same investment adviser,
particularly when the same security is suitable for the investment objectives of
more than one client. When two or more clients are simultaneously engaged in the
purchase or  sale of  the  same security,  the  securities are  allocated  among
clients    in   a   manner   believed   by   the   Adviser   to   be   equitable
 
                                       22
<PAGE>
to each.  It  is  recognized  that  in some  cases  this  system  could  have  a
detrimental  effect on the price or volume of the security as far as a Series is
concerned. In other  cases, however, it  is believed that  a Series' ability  to
participate  in  volume  transactions  will produce  better  executions  for the
Series.
 
6.  TAX STATUS
 
Shares of  the  Series  are  offered  only  to  the  separate  accounts  of  the
Participating  Insurance  Companies  that  fund  Contracts.  See  the applicable
Contract prospectus for a discussion of the special taxation of those  companies
with respect to those accounts and of the Contract holders.
 
   
Each Series of the Trust intends to elect and qualify each year for treatment as
a "regulated investment company" under Subchapter M of the Internal Revenue Code
of  1986,  as amended  (the "Code")  by meeting  all applicable  requirements of
Subchapter M, including  requirements as  to the  nature of  each Series'  gross
income,  the  amount  of each  Series'  distributions, and  the  composition and
holding period of each Series' portfolio assets. Because each Series intends  to
distribute  all of its net  investment income and net  realized capital gains to
shareholders in accordance with the timing requirements imposed by the Code,  it
is  not expected  that any  of the Series  will be  required to  pay any federal
income or excise taxes, although a Series which has foreign-source income may be
subject to  foreign withholding  taxes. If  any  of the  Series should  fail  to
qualify as a "regulated investment company" in any year, that Series would incur
a regular corporate federal income tax upon its taxable income.
    
 
Each Series intends to diversify its assets as required by section 817(h) of the
Code  and the regulations thereunder. These  requirements, which are in addition
to the diversification requirements of  Subchapter M, place certain  limitations
on  the proportion of each Series' assets  that may be represented by any single
investment and  securities from  the same  issuer. If  a Series  should fail  to
comply  with these  requirements, variable  annuity and  variable life insurance
contracts that invest in the Series  would not be treated as annuity,  endowment
or life insurance contracts under the Code.
 
   
Distributions  of  net capital  gains,  whether made  in  cash or  in additional
shares, are taxable to shareholders as long-term capital gains without regard to
the length of time the shareholders have  held their shares. Any dividends of  a
Series  that are declared in October, November, or December, that are payable to
shareholders of record in  such month and that  are paid the following  January,
will  be treated as  if received on  December 31 of  the year in  which they are
declared.
    
 
Any investment  by a  Series  in zero  coupon  bonds, deferred  interest  bonds,
payment-in-kind  bonds,  certain  stripped  securities,  and  certain securities
purchased at a market discount will  cause the Series to recognize income  prior
to  the receipt of cash  payments with respect to  those securities. In order to
distribute this income and avoid a tax on the Series, the Series may be required
to liquidate  portfolio securities  that it  might otherwise  have continued  to
hold, potentially resulting in additional taxable gain or loss to the Series.
 
   
A  Series' transactions in options,  Futures Contracts, Forward Contracts, swaps
and related transactions will  be subject to special  tax rules that may  affect
the  amount,  timing,  and  character  of  Series  income  and  distributions to
shareholders. For  example, certain  positions  held by  a  Series on  the  last
business  day of each taxable year will be marked to market (I.E., treated as if
closed out) on such day, and any gain or loss associated with the positions will
be treated as  60% long-term and  40% short-term capital  gain or loss.  Certain
positions  held by a  Series that substantially  diminish its risk  of loss with
respect to other positions in its portfolio may constitute "straddles," and  may
be  subject to  special tax  rules that would  cause deferral  of Series losses,
adjustments in  the holding  periods  of Series  securities, and  conversion  of
short-term  into  long-term  capital  losses. Certain  tax  elections  exist for
straddles which may alter the effects of these rules. Each Series will limit its
activities in  options,  Futures  Contracts, Forward  Contracts  and  swaps  and
related  transactions  to  the  extent necessary  to  meet  the  requirements of
Subchapter M of the Code.
    
 
   
Special tax  considerations  apply with  respect  to foreign  investments  of  a
Series.  Foreign exchange gains and losses realized by the Series will generally
be treated  as  ordinary  income  and losses.  Use  of  foreign  currencies  for
non-hedging  purposes  may be  limited  in order  to avoid  a  tax on  a Series.
Investment by a  Series in  certain "passive foreign  investment companies"  may
also  be  limited in  order  to avoid  a tax  on  the Series.  Investment income
received by a Series  from foreign securities may  be subject to foreign  income
taxes  withheld at the source.  The United States has  entered into tax treaties
with many foreign countries that may entitle  a Series to a reduced rate of  tax
or  an exemption  from tax  on such  income; the  Series' intend  to qualify for
treaty reduced rates where available. It is impossible, however, to determine  a
Series  effective rate of foreign tax in advance since the amount of the Series'
assets to be invested within various countries is not known.
    
 
7.  NET INCOME AND DISTRIBUTIONS
 
MONEY MARKET SERIES: The net income  attributable to the Money Market Series  is
determined  each day during  which the Exchange  is open for  trading. As of the
date of this SAI, the Exchange is open for trading every weekday except for  the
following  holidays (or the  days on which  they are observed):  New Year's Day,
Presidents' Day,  Good  Friday,  Memorial  Day,  Independence  Day,  Labor  Day,
Thanksgiving Day, Christmas Day. (For taxation information on distributions, see
"Tax Status" above.)
 
For  this purpose,  the net  income attributable to  shares of  the Money Market
Series (from the time of the immediately preceding determination thereof)  shall
consist  of (i) all interest income accrued on the portfolio assets of the Money
Market Series, (ii) less all actual and accrued expenses of Money Market  Series
determined  in  accordance with  generally  accepted accounting  principles, and
(iii)  plus  or  minus  net  realized  gains  and  losses  and  net   unrealized
appreciation  or depreciation on the assets of the Money Market Series. Interest
income shall include discount earned  (including both original issue and  market
discount) on discount paper accrued ratably to the date of maturity.
 
Since  the net  income is  declared as a  dividend each  time the  net income is
determined, the net asset value per share (I.E., the value of the net assets  of
the  Money Market Series divided by the number of shares outstanding) remains at
$1.00  per  share  immediately  after  each  such  determination  and   dividend
declaration. Any
 
                                       23
<PAGE>
increase   in  the  value  of   a  shareholder's  investment,  representing  the
reinvestment of dividend income,  is reflected by an  increase in the number  of
shares in its account.
 
It  is expected the shares  of the Money Market Series  will have a positive net
income at the  time of each  determination thereof.  If for any  reason the  net
income  determined at  any time  is a  negative amount,  which could  occur, for
instance, upon default by  an issuer of a  portfolio security, the Money  Market
Series  would first offset the negative  amount with respect to each shareholder
account from the dividends declared during  the month with respect to each  such
account.  If and to the  extent that such negative  amount exceeds such declared
dividends at the end of the month (or during the month in the case of an account
liquidated in its entirety), the Money Market Series could reduce the number  of
its  outstanding shares by treating each  shareholder of the Money Market Series
as having contributed to its capital  that number of full and fractional  shares
of  the Money Market Series in the  account of such shareholder which represents
its proportion of such excess. Each shareholder the Money Market Series will  be
deemed  to  have  agreed to  such  contribution  in these  circumstances  by its
investment in the Money Market Series. This procedure would permit the net asset
value per share of the Money Market Series to be maintained at a constant  $1.00
per share.
 
ALL  OTHER SERIES:  Each Series  other than the  Money Market  Series intends to
distribute to its shareholders annually dividends substantially equal to all  of
its  net  investment  income. Such  Series'  net investment  income  consists of
non-capital gain income  less expenses.  Such Series' intend  to distribute  net
realized  short-  and  long-term  capital  gains,  if  any,  at  least annually.
Shareholders will be  informed of  the tax consequences  of such  distributions,
including  whether any portion represents a return  of capital, after the end of
each calendar  year.  (For additional  taxation  information, see  "Tax  Status"
above.)
 
8.  DETERMINATION OF NET ASSET VALUE;
   PERFORMANCE INFORMATION
 
NET ASSET VALUE
 
The net asset value per share of each Series is determined each day during which
the  Exchange is open for  trading. This determination is  made once during each
such day as of  the close of  regular trading on the  Exchange by deducting  the
amount  of a Series' liabilities  from the value of  its assets and dividing the
difference by the number of shares of the Series outstanding.
 
   
MONEY MARKET SERIES: Portfolio securities of the Money Market Series are  valued
at  amortized cost, which the Trustees have determined in good faith constitutes
fair value  for the  purposes of  complying with  the 1940  Act. This  valuation
method  will continue to be used until  such time as the Trustees determine that
it does not  constitute fair value  for such purposes.  The Money Market  Series
will  limit  its  portfolio  to  those  investments  in  U.S. dollar-denominated
instruments which the Board of Trustees determines present minimal credit risks,
and which are of high quality as  determined by any major rating service or,  in
the  case  of any  instrument that  is not  so rated,  of comparable  quality as
determined by the Board of Trustees. The Money Market Series has also agreed  to
maintain  a dollar-weighted average  maturity of 90  days or less  and to invest
only in securities  maturing in 13  months or  less. The Board  of Trustees  has
established  procedures designed to  stabilize the net asset  value per share of
the Money Market Series, as computed for the purposes of sales and  redemptions,
at  $1.00 per share. If  the Trustees determine that  a deviation from the $1.00
per share price  may exist  which may  result in  a material  dilution or  other
unfair  result to investors or existing  shareholders, they will take corrective
action they regard as necessary and appropriate, which action could include  the
sale  of instruments  prior to  maturity (to  realize capital  gains or losses);
shortening average portfolio  maturity; withholding dividends;  or using  market
quotations for valuation purposes.
    
 
   
ALL  OTHER  SERIES:  Securities,  futures contracts  and  options  in  a Series'
portfolio (other than short-term obligations) for which the principal market  is
one  or more  securities or  commodities exchanges  will be  valued at  the last
reported sale price or at the settlement price prior to the determination (or if
there has  been no  current  sale, at  the closing  bid  price) on  the  primary
exchange  on which such securities, futures contracts or options are traded; but
if a  securities exchange  is  not the  principal  market for  securities,  such
securities  will,  if  market quotations  are  readily available,  be  valued at
current bid prices,  unless such  securities are  reported on  the Nasdaq  stock
market,  in which case  they are valued at  the last sale price  or, if no sales
occurred during the day,  at the last quoted  bid price. Debt securities  (other
than  short-term obligations but including listed issues) in a Series' portfolio
are valued  on the  basis of  valuations furnished  by a  pricing service  which
utilizes   both  dealer-supplied  valuations   and  electronic  data  processing
techniques   which   take   into    account   appropriate   factors   such    as
institutional-sized  trading in  similar groups of  securities, yields, quality,
coupon rate, maturity, type of  issue, trading characteristics and other  market
data,   without   exclusive  reliance   upon  quoted   prices  or   exchange  or
over-the-counter prices,  since such  valuations are  believed to  reflect  more
accurately the fair value of such securities. Short-term obligations, if any, in
a  Series' portfolio are valued at  amortized cost, which constitutes fair value
as determined by the Board of  Trustees. Short-term securities with a  remaining
maturity  in  excess  of 60  days  will  be valued  based  upon  dealer supplied
valuations. Portfolio securities and  over-the-counter options, for which  there
are  no quotations or valuations are valued  at fair value as determined in good
faith by or at the direction of the Board of Trustees.
    
 
PERFORMANCE INFORMATION
 
MONEY MARKET SERIES: The Money Market Series will provide current annualized and
effective annualized yield quotations based on the daily dividends of shares  of
the  Money Market  Series. These  quotations may  from time  to time  be used in
advertisements, shareholder reports or other communications to shareholders.
 
Any current yield quotation of the Money  Market Series which is used in such  a
manner  as to  be subject to  the provisions of  Rule 482(d) under  the 1933 Act
shall consist of an annualized historical yield, carried at least to the nearest
hundredth of one  percent, based  on a specific  seven calendar  day period  and
shall be calculated by dividing the net change in the value of an account having
a balance of one share of that class at the beginning of the period by the value
of the account at the beginning of the period and
 
                                       24
<PAGE>
   
multiplying  the quotient by 365/7.  For this purpose the  net change in account
value would  reflect the  value of  additional shares  purchased with  dividends
declared on the original share and dividends declared on both the original share
and  any such  additional shares,  but would not  reflect any  realized gains or
losses  from  the  sale  of   securities  or  any  unrealized  appreciation   or
depreciation on portfolio securities. In addition, any effective yield quotation
of  the  Money Market  Series so  used  shall be  calculated by  compounding the
current yield quotation for such period by multiplying such quotation by  7/365,
adding  1  to the  product,  raising the  sum  to a  power  equal to  365/7, and
subtracting 1 from the result. These  yield quotations should not be  considered
as  representative of the yield  of the Money Market  Series in the future since
the yield will vary based on the type, quality and maturities of the  securities
held  in its portfolio, fluctuations in short-term interest rates and changes in
the Money Market Series expenses. Yield quotations for the Series are  presented
in Appendix A attached hereto.
    
 
ALL OTHER SERIES:
 
   
TOTAL  RATE OF RETURN --  Each Series, other than  the Money Market Series, will
calculate its  total  rate  of return  of  its  shares for  certain  periods  by
determining  the average  annual compounded rates  of return  over those periods
that  would  cause  an  investment  of  $1,000  (made  with  all   distributions
reinvested)  to reach the  value of that  investment at the  end of the periods.
Each Series may also calculate total  rates of return which represent  aggregate
performance  over a  period or  year-by-year performance.  Total rate  of return
quotations for each Series are presented in Appendix A attached hereto.
    
 
   
YIELD -- Any yield quotation for a  Series, other than the Money Market  Series,
is  based on the annualized  net investment income per  share of that Series for
the 30-day period ended December 31, 1996 (the end of the Trust's fiscal  year).
The  yield for such a Series is calculated by dividing its net investment income
earned during the period by the offering  price per share of that Series on  the
last  day of the period. The resulting figure is then annualized. Net investment
income per share  is determined by  dividing (i) the  dividends and interest  of
that  Series during the  period, minus accrued  expenses of that  Series for the
period by (ii) the average number of  shares of that Series entitled to  receive
dividends  during the period multiplied  by the offering price  per share on the
last day  of the  period. Yield  quotations  for each  Series are  presented  in
Appendix A attached hereto.
    
 
From  time  to time  each Series  may,  as appropriate,  quote fund  rankings or
reprint all  or a  portion of  evaluations of  fund performance  and  operations
appearing  in various independent publications, including but not limited to the
following: Money,  Fortune, U.S.  News and  World Report,  Kiplinger's  Personal
Finance,  The Wall Street Journal, Barron's, Investors Business Daily, Newsweek,
Financial World, Financial Planning, Investment Advisor, USA Today, Pensions and
Investments, SmartMoney,  Forbes,  Global  Finance,  Registered  Representative,
Institutional  Investor,  the  Investment Company  Institute,  Johnson's Charts,
Morningstar, Lipper Analytical  Services, Inc., Variable  Annuity Research  Data
Service,  CDA Wiesenberger, Shearson Lehman and Salomon Bros. Indices, Ibbotson,
Business Week, Lowry Associates, Media General, Investment Company Data, The New
York Times, Your Money, Strangers Investment Advisor, Financial Planning on Wall
Street, Standard and Poor's, Individual Investor, THE 100 BEST MUTUAL FUNDS  YOU
CAN BUY, by Gordon K. Williamson, Consumer Price Index, and Sanford C. Bernstein
&  Co. Series'  performance may  also be  compared to  the performance  of other
mutual funds tracked by financial or business publications or periodicals.
 
   
From time to time a Series may discuss or quote its current portfolio manager as
well as  other  investment personnel,  including  such persons'  views  on:  the
economy;  securities markets; portfolio securities and their issuers; investment
philosophies, strategies,  techniques  and criteria  used  in the  selection  of
securities  to  be  purchased or  sold  for  the Series;  the  Series' portfolio
holdings; the  investment research  and analysis  process; the  formulation  and
evaluation  of investment recommendations; and  the assessment and evaluation of
credit, interest rate, market and economic risks and similar or related matters.
    
 
The Series  may  also  quote  evaluations  mentioned  in  independent  radio  or
television broadcasts.
 
From  time to time the  Series may use charts and  graphs to illustrate the past
performance of various indices such as those mentioned above.
 
   
From time  to  time  the Fund  may  also  discuss  or quote  the  views  of  its
distributor,  its investment adviser  and other financial  planning, legal, tax,
accounting, insurance, estate planning and other professionals, or from surveys,
regarding individual  and  family financial  planning.  Such views  may  include
information  regarding: retirement  planning; tax  management strategies; estate
planning; general investment techniques (E.G., asset allocation and  disciplined
saving  and  investing);  business succession;  ideas  and  information provided
through the MFS  Heritage Planning-SM- program,  an intergenerational  financial
planning  assistance program; issues with respect to insurance (E.G., disability
and life  insurance  and  Medicare  supplemental  insurance);  issues  regarding
financial  and health care management for elderly family members; and similar or
related matters.
    
 
MFS FIRSTS: MFS has a long history of innovations.
 
- -- 1924 -- Massachusetts Investors  Trust is established  as the first  open-end
   mutual fund in America.
 
- -- 1924  -- Massachusetts Investors Trust is the  first mutual fund to make full
   public disclosure of its operations in shareholder reports.
 
- -- 1932 -- One  of the  first internal  research departments  is established  to
   provide in-house analytical capability for an investment management firm.
 
- -- 1933  -- Massachusetts Investors  Trust is the first  mutual fund to register
   under the 1933 Act ("Truth in Securities Act" or "Full Disclosure Act").
 
- -- 1936 --  Massachusetts Investors  Trust is  the first  mutual fund  to  allow
   shareholders  take capital gain distributions  either in additional shares or
   in cash.
 
- -- 1976 --  MFS-Registered Trademark-  Municipal Bond  Fund is  among the  first
   municipal bond funds established.
 
- -- 1979 -- Spectrum becomes the first combination fixed/variable annuity with no
   initial sales charge.
 
                                       25
<PAGE>
- -- 1981  -- MFS-Registered Trademark-  World Governments Fund  is established as
   America's first globally diversified fixed income mutual fund.
 
- -- 1984 -- MFS-Registered  Trademark- Municipal  High Income Fund  is the  first
   mutual   fund  to  seek  high  tax-free  income  from  lower-rated  municipal
   securities.
 
- -- 1986 --  MFS-Registered Trademark-  Managed Sectors  Fund becomes  the  first
   mutual  fund  to  target and  shift  investments among  industry  sectors for
   shareholders.
 
- -- 1986 --  MFS-Registered  Trademark-  Municipal  Income  Trust  is  the  first
   closed-end,  high-yield  municipal bond  fund traded  on  the New  York Stock
   Exchange.
 
- -- 1987 --  MFS-Registered  Trademark- Multimarket  Income  Trust is  the  first
   closed-end,  multimarket  high  income  fund listed  on  the  New  York Stock
   Exchange.
 
- -- 1989 --  MFS  Regatta  becomes America's  first  non-qualified  market  value
   adjusted fixed/variable annuity.
 
- -- 1990 -- MFS-Registered Trademark- World Total Return Fund is the first global
   balanced fund.
 
- -- 1993  --  MFS-Registered Trademark-  World Growth  Fund  is the  first global
   emerging markets fund to offer the expertise of two sub-advisers.
 
- -- 1993 -- MFS becomes money manager of MFS-Registered Trademark- Union Standard
   Trust,  the  first  trust  to  invest  solely  in  companies  deemed  to   be
   union-friendly  by  an  Advisory  Board  of  senior  labor  officials, senior
   managers of companies with significant  labor contracts, academics and  other
   national labor leaders or experts.
 
9.  DESCRIPTION OF SHARES, VOTING RIGHTS AND LIABILITIES
 
The  Trust's Declaration of Trust permits the  Trustees of the Trust to issue an
unlimited number of full and  fractional Shares of Beneficial Interest  (without
par value) of one or more separate series and to divide or combine the shares of
any  series into a greater  or lesser number of  shares without thereby changing
the proportionate  beneficial  interests  in  that  series.  The  Trustees  have
currently  authorized shares of  the twelve series identified  on page 2 hereof.
The Declaration  of  Trust  further  authorizes  the  Trustees  to  classify  or
reclassify  any series of shares into one  or more classes. The Trustees have no
current intention to classify  more than one  class of shares.  Each share of  a
Series  represents an equal proportionate interest  in the assets of the Series.
Upon liquidation of a Series, shareholders  of the Series are entitled to  share
PRO  RATA  in  the  net  assets of  the  Series  available  for  distribution to
shareholders. The Trust reserves the right to create and issue additional series
or classes of shares, in which case  the shares of each class would  participate
equally  in the earnings,  dividends and assets  allocable to that  class of the
particular series.
 
   
Shareholders are entitled to one  vote for each share held  and may vote in  the
election of Trustees and on other matters submitted to meetings of shareholders.
To  the  extent any  Series' shareholder  owns a  controlling percentage  of the
Series' shares, such  shareholder may affect  the outcome of  such matters to  a
greater  extent  that other  Series  shareholders (see  "Description  of Shares,
Voting Rights and  Liabilities" in  the Prospectus). Although  Trustees are  not
elected   annually  by   the  shareholders,  shareholders   have  under  certain
circumstances the right to  remove one or more  Trustees in accordance with  the
provisions  of Section 16(c) of the 1940  Act. No material amendment may be made
to the Declaration of Trust  without the affirmative vote  of a majority of  the
Trust's  shares. Shares  have no  pre-emptive or  conversion rights.  Shares are
fully  paid  and  non-assessable.  The  Trust   may  enter  into  a  merger   or
consolidation,  or  sell all  or  substantially all  of  its assets  (or  all or
substantially all  of the  assets belonging  to  any series  of the  Trust),  if
approved  by the vote  of the holders  of two-thirds of  the Trust's outstanding
shares voting as a single class, or of the affected series of the Trust, as  the
case  may be, except  that if the  Trustees of the  Trust recommend such merger,
consolidation or sale, the approval by vote of the holders of a majority of  the
Trust's  or the affected  series' outstanding shares  (as defined in "Investment
Restrictions") will be sufficient. The Trust or any series of the Trust may also
be terminated (i) upon liquidation and  distribution of its assets, if  approved
by  the vote of the holders of two-thirds  of its outstanding shares, or (ii) by
the Trustees by written notice to the shareholders of the Trust of the  affected
series. If not so terminated, the Trust will continue indefinitely.
    
 
The  Trust is an entity of the  type commonly known as a "Massachusetts business
trust." Under Massachusetts law, shareholders of such a trust may, under certain
circumstances, be  held  personally  liable as  partners  for  its  obligations.
However,  the Declaration of Trust contains an express disclaimer of shareholder
liability for acts or obligations of the Trust and provides for  indemnification
and  reimbursement of  expenses out of  Trust property for  any shareholder held
personally liable for  the obligations of  the Trust. The  Declaration of  Trust
also  provides  that  it  shall  maintain  appropriate  insurance  (for example,
fidelity bonding and errors and omissions  insurance) for the protection of  the
Trust,  its  shareholders,  Trustees, officers,  employees  and  agents covering
possible tort or other  liabilities. Thus, the risk  of a shareholder  incurring
financial  loss on account of shareholder  liability is limited to circumstances
in which both inadequate  insurance existed and the  Trust itself was unable  to
meet its obligations.
 
The  Declaration of Trust further provides that obligations of the Trust are not
binding upon the Trustees individually but  only upon the property of the  Trust
and  that the Trustees will not be liable  for any action or failure to act, but
nothing in the Declaration of Trust protects a Trustee against any liability  to
which he would otherwise be subject by reason of willful misfeasance, bad faith,
gross negligence, or reckless disregard of the duties involved in the conduct of
his office.
 
10.  INDEPENDENT AUDITORS AND FINANCIAL STATEMENTS
 
   
Deloitte  & Touche  LLP are  the Trust's  independent auditors,  providing audit
services, tax return preparation, and  assistance and consultation with  respect
to  the  preparation  of filings  with  the  SEC. The  Statement  of  Assets and
Liabilities for the MFS Strategic Fixed Income Series at December 31, 1996,  the
Notes  thereto and the Independent Auditors'  Report dated February 7, 1997 have
been included in this  SAI in reliance  upon the report  of Deloitte and  Touche
LLP,  independent  certified public  accountants, as  experts in  accounting and
auditing. With  respect to  the Emerging  Growth, Value,  Research, Growth  With
Income,  Total Return, Utilities, High  Income, World Governments, Bond, Limited
Maturity and Money
    
 
                                       26
<PAGE>
   
Market Series, the Portfolio of Investments at December 31, 1996, the  Statement
of  Assets and Liabilities at December 31, 1996, the Statement of Operations for
the period ended December 31, 1996, the  Statement of Changes in Net Assets  for
the  period ended December 31,  1996, the Notes to  Financial Statements and the
Independent Auditors' Report, each of which is included in the Annual Reports to
Shareholders of these Series,  are incorporated by reference  into this SAI  and
have  been so incorporated in reliance upon the report of Deloitte & Touche LLP,
independent certified public accountants, as experts in accounting and auditing.
Copies of these Annual Reports accompany this SAI.
    
 
                                       27
<PAGE>
   
                       MFS STRATEGIC FIXED INCOME SERIES
                      STATEMENT OF ASSETS AND LIABILITIES
                               DECEMBER 31, 1996
    
   
<TABLE>
<S>                                                                                                               <C>
Assets:
  Cash..........................................................................................................   $   7,638
  Deferred organization expenses................................................................................       9,188
                                                                                                                  -----------
    Total assets................................................................................................   $  16,826
 
Liabilities:
  Accrued expenses..............................................................................................       8,226
                                                                                                                  -----------
    Net assets..................................................................................................   $   8,600
                                                                                                                  -----------
                                                                                                                  -----------
Net Asset Value, Redemption Price and Offering Price Per Share of Beneficial Interest
  (860 shares outstanding for each Series)......................................................................  $    10.00
                                                                                                                  -----------
                                                                                                                  -----------
 
<CAPTION>
Assets:
<S>                                                                                                               <C>
  Cash..........................................................................................................
  Deferred organization expenses................................................................................
    Total assets................................................................................................
Liabilities:
  Accrued expenses..............................................................................................
    Net assets..................................................................................................
Net Asset Value, Redemption Price and Offering Price Per Share of Beneficial Interest
  (860 shares outstanding for each Series)......................................................................
<FN>
 
NOTES:
 
(1)  The MFS Variable Insurance Trust (the "Trust") was organized on February 1,
    1994  as  a  business   trust  under  the  laws   of  The  Commonwealth   of
    Massachusetts.  The Trust currently  consists of twelve  series of shares or
    funds (the  "Series"): MFS  Emerging Growth  Series, MFS  Value Series,  MFS
    Research Series, MFS Growth with Income Series, MFS Total Return Series, MFS
    Utilities  Series, MFS High Income Series, MFS World Governments Series, MFS
    Strategic Fixed Income Series, MFS Bond Series, MFS Limited Maturity  Series
    and  MFS Money Market Series. The MFS Strategic Fixed Income Series has been
    inactive since that date except for matters relating to its organization and
    the Trust's  registration  as an  investment  company under  the  Investment
    Company  Act of 1940 and the sale  of 860 shares of beneficial interest (the
    "initial shares") of  each such Series  to Massachusetts Financial  Services
    Company.
(2)  Organization expenses  are being deferred  and will be  amortized over five
    years beginning with the commencement  of investment operations. The  amount
    paid  by any  Series on any  redemption by  Massachusetts Financial Services
    Company, or  any current  holder  of any  Series'  initial shares,  will  be
    reduced  by the  pro rata portion  of any  unamortized organization expenses
    which the number  of initial shares  redeemed bears to  the total number  of
    initial shares outstanding immediately prior to such redemption.
</TABLE>
    
 
                                       28
<PAGE>
                          INDEPENDENT AUDITORS' REPORT
 
   
To the Board of Trustees of MFS Variable Insurance Trust and Shareholders of MFS
Strategic Fixed Income Series:
    
 
   
We  have audited  the accompanying  statement of  assets and  liabilities of MFS
Strategic Fixed  Income Series  (the "Series")  (a series  of the  MFS  Variable
Insurance Trust (the "Trust")) as of December 31, 1996. This financial statement
is  the  responsibility  of the  Trust's  management. Our  responsibility  is to
express an opinion on this financial statement based on our audit.
    
 
   
We conducted our audit in accordance with generally accepted auditing standards.
Those standards require that we plan and perform the audit to obtain  reasonable
assurance  about  whether the  statement of  assets and  liabilities is  free of
material misstatement. An audit  includes examining, on  a test basis,  evidence
supporting   the  amounts  and  disclosures  in  the  statement  of  assets  and
liabilities. An audit also includes assessing the accounting principles used and
significant estimates  made by  management, as  well as  evaluating the  overall
financial  statement presentation. We believe that our audit of the statement of
assets and liabilities provides a reasonable basis for our opinion.
    
 
   
In our opinion, such statement of assets and liabilities presents fairly, in all
material respects, the financial position of the Series at December 31, 1996  in
conformity with generally accepted accounting principles.
    
 
   
Deloitte & Touche LLP
Boston, Massachusetts
February 7, 1997
    
 
                                       29
<PAGE>
   
                                                                      APPENDIX A
    
 
   
                             PERFORMANCE QUOTATIONS
    
 
   
All performance quotations are for the period ended December 31, 1996.
    
 
   
<TABLE>
<CAPTION>
                                                                         AVERAGE ANNUAL
                                                                         TOTAL RETURNS       ACTUAL 30-DAY     30-DAY
                                                                     ----------------------      YIELD         YIELD
                                                                                  LIFE OF     (INCLUDING      (WITHOUT
                              SERIES                                  1 YEAR      SERIES       WAIVERS)       WAIVERS)
- -------------------------------------------------------------------  ---------  -----------  -------------  ------------
<S>                                                                  <C>        <C>          <C>            <C>
Emerging Growth....................................................      17.02%      24.67%(1)           --           --
Value..............................................................         --        8.78%(2)           --           --
Research...........................................................      22.33%      23.46%(3)           --           --
Growth with Income.................................................      24.46%      25.88%(4)           --           --
Total Return.......................................................      14.37%      20.74%(5)           --           --
Utilities..........................................................      18.51%      26.07%(5)           --           --
High Income........................................................      11.80%      12.00%(3)         7.88%         5.80%
World Governments..................................................       4.03%       7.39%(6)         4.68%         4.03%
Bond...............................................................       2.09%       4.32%(7)         4.60%       -20.86%
Limited Maturity...................................................         --        2.61%(2)         5.32%        -1.26%
Money Market.......................................................       4.55%       4.47%(5)           N/A          N/A
</TABLE>
    
 
- ------------------------------
   
 (1) From the commencement of investment operations on July 24, 1995.
    
   
 (2) Aggregate Annual Total Rate of Return from the commencement of investment
operations on August 14, 1996.
    
   
 (3) From the commencement of investment operations on July 26, 1995.
    
   
 (4) From the commencement of investment operations on October 9, 1995.
    
   
 (5) From the commencement of investment operations on January 3, 1995.
    
   
 (6) From the commencement of investment operations on June 14, 1994.
    
   
 (7) From the commencement of investment operations on October 24, 1995.
    
 
   
The current annualized yield of the Money Market Series for the seven-day period
ended  December 31, 1996  was 4.71%, and  the effective annualized  yield of the
Money Market Series for such period was 4.82%.
    
 
                                      A-1
<PAGE>
INVESTMENT ADVISER
Massachusetts Financial Services Company
500 Boylston Street, Boston, MA 02116
(617) 954-5000
(800) 637-8730
 
DISTRIBUTOR
MFS Fund Distributors, Inc.
500 Boylston Street, Boston, MA 02116
(617) 954-5000
CUSTODIAN
Investors Bank & Trust Company
89 South Street, Boston, Massachusetts 02110
 
DIVIDEND DISBURSING AGENT
State Street Bank and Trust Company
225 Franklin Street, Boston, MA 02110
 
SHAREHOLDER SERVICING AGENT
MFS Service Center, Inc.
500 Boylston Street, Boston, MA 02116
Toll free: (800) 637-8730
MAILING ADDRESS
P.O. Box 1400, Boston, MA 02104-9985
INDEPENDENT AUDITORS
Deloitte & Touche LLP
125 Summer Street, Boston, MA 02110
 
MFS-REGISTERED TRADEMARK- VARIABLE
INSURANCE TRUST-SM-
500 Boylston Street
Boston, MA 02116
 
              [LOGO]

<PAGE>
[logo] M F S(SM)                                                  ANNUAL REPORT
INVESTMENT MANAGEMENT                                            FOR YEAR ENDED
                                                              DECEMBER 31, 1996
MFS(R) EMERGING GROWTH SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST


[Graphic Omitted]
<PAGE>
MFS(R) EMERGING GROWTH SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST

<TABLE>
<C>                                                                 <C>
TRUSTEES                                                            INVESTMENT ADVISER
A. Keith Brodkin*                                                   Massachusetts Financial Services Company
Chairman and President                                              500 Boylston Street
                                                                    Boston, MA 02116-3741
Nelson J. Darling, Jr.
Trustee, Eastern Enterprises                                        DISTRIBUTOR
(diversified holding company)                                       MFS Fund Distributors, Inc.
                                                                    500 Boylston Street
William R. Gutow                                                    Boston, MA 02116-3741
Vice Chairman,
Capitol Entertainment Management Company                            SHAREHOLDER SERVICE CENTER
(Blockbuster Video Franchise)                                       MFS Service Center, Inc.
                                                                    P.O. Box 1400
PORTFOLIO MANAGERS                                                  Boston, MA 02107-9906
John W. Ballen*
Toni Y. Shimura*                                                    For additional information,
                                                                    contact your financial adviser.
TREASURER
W. Thomas London*                                                   CUSTODIAN
                                                                    Investors Bank & Trust Company
ASSISTANT TREASURER
James O. Yost*                                                      AUDITORS
                                                                    Deloitte & Touche LLP
SECRETARY
Stephen E. Cavan*                                                   WORLD WIDE WEB
                                                                    www.mfs.com
ASSISTANT SECRETARY
James R. Bordewick, Jr.*

*Affiliated with the Investment Adviser
</TABLE>
<PAGE>
Dear Contract Owner:
The pattern of slow but sustainable growth seen in most of the world in 1996
seems likely to continue in 1997. While it looks as if U.S. growth in 1997
will slow modestly relative to 1996, there is evidence that Europe and, to a
lesser degree, Japan are continuing their recoveries from recession. At the
same time, companies in many emerging markets are reporting robust increases
in earnings as these markets benefit from higher-than-average economic growth
and market reforms, which should continue to provide more opportunities for
development and trade.

    After more than six years of expansion, the U.S. economy appears headed
toward another year of at least moderate growth in 1997, although a few signs
point to the possibility of a modest rise in inflation during the year. On the
positive side, the pattern of moderate growth and inflation set over the past
few years now seems fairly well entrenched in the economy and, short of a
major international or domestic crisis, appears to have enough momentum to
remain on track for some time. Recent gains in such important sectors as
housing, automobiles, industrial production, and exports indicate a fair
amount of underlying strength in the economy. However, some reason for caution
can be seen in the continuing high levels of consumer debt and their attendant
rise in personal bankruptcies, as well as in the modestly disappointing levels
of holiday sales. Also, the ongoing tightness in labor markets, and price
rises in such important sectors as energy, could add some inflationary
pressures to the economy. Given these somewhat conflicting indicators, we
expect real (inflation-adjusted) growth to revolve around 2% in 1997, which
would represent a modest decline from 1996.

    We continue to urge U.S. equity investors to lower their expectations for
1997 and to point out that the impressive gains of the past two years are not
sustainable. Just as the slowdown in corporate earnings growth and increases
in interest rates in 1996 raised some near-term concerns, further interest
rate increases and an acceleration of inflation could negatively affect the
stock market in 1997. However, to the extent that some slowdown in earnings
means that the economy is not overheating, this may be beneficial for the
equity market in the long run. Also, we believe many of the technology-driven
productivity gains that U.S. companies have made in recent years will continue
to enhance corporate America's competitiveness and profitability. Therefore,
while we have some near-term concerns, we remain reasonably positive about the
long-term viability of the equity market.

    In U.S. bond markets, conflicting signals over the strength of the economy
have created near-term volatility. Even comments by Federal Reserve Chairman
Alan Greenspan late in 1996 created some uncertainty over the Federal Reserve
Board's next move. We expect the Fed to maintain its anti-inflationary stance
should signs of more rapid economic growth and, particularly, higher inflation
resurface. While inflationary forces largely remained in check in 1996, the
continued strength in the labor market and rising energy prices mean that a
pickup in inflation is still possible. At the same time, the U.S. budget
deficit continues to decline and, as a percentage of gross domestic product,
is now less than 2%, which we consider a positive development for the bond
markets. Although interest rates may move higher over the coming months, we
believe that, at current levels, fixed-income markets remain equitably valued.

    Internationally, the environment of moderate growth, benign inflation, and
fairly steady interest rates is also providing support for investment markets
and should help support valuation levels in the coming year. Throughout the
world, the key to stock market performance in 1997 will be corporate earnings
growth. While U.S. earnings growth is slowing but still expected to be fairly
healthy, we anticipate that a number of European countries will see an
acceleration in earnings growth and improved valuations in 1997. Despite this
environment, many European countries trade at discounts to the United States.
In particular, we see opportunities in some of the multinationals and
businesses with the ability to generate steady earnings growth. In Japan, a
recovery appears to be taking place, but at a very modest rate, with
valuations still at high levels. In the emerging markets, the long-term
economic growth story remains intact and, although selectivity is even more
important in these markets, more companies are benefiting from this growth and
trading at below-average global valuations.

    Comments from the portfolio managers of the Series are presented below. We
appreciate your support and welcome any questions or comments you may have.

Respectfully,

/s/A. Keith Brodkin           /s/John W. Ballen          /s/Toni Y. Shimura
   A. Keith Brodkin              John W. Ballen             Toni Y. Shimura
   Chairman and President        Portfolio Manager          Portfolio Manager

January 16, 1997


MFS EMERGING GROWTH SERIES

For the 12 months ended December 31, 1996, the Series provided a total return
of 17.02%. This compares to a 16.35% return for the Russell 2000 Total Return
Index (the Russell 2000) and a 22.64% return for the Standard & Poor's 500
Composite Index (the S&P 500) for the same period. The Russell 2000 is an
unmanaged index comprised of 2,000 of the smallest U.S.-domiciled companies'
common stocks (on the basis of capitalization) that are traded in the United
States on the New York Stock Exchange, the American Stock Exchange, and the
NASDAQ. The S&P 500 is an unmanaged index of common stock performance. It is
not possible to invest in an index. Although the Series' performance benefited
from the strong stock price appreciation of many of its holdings in the
technology and consumer sectors, the overall stock market in 1996 was
dominated by the larger capitalization issues as represented by the Dow Jones
Industrial Average and the S&P 500. However, the Series' performance compared
favorably to the Russell 2000 as investors rewarded the earnings growth of
many of the companies owned by the Series.

    Generally, the business and economic environment was benign. Modest
economic growth coupled with productivity gains by corporate America provided
a favorable environment. However, semiconductor issues performed poorly as
inventory surpluses hurt sales. Health maintenance organizations (HMOs) also
performed weakly as companies underestimated health care costs and set their
prices too low. This poor performance spilled over into the first half of the
year for the entire technology and health care sectors -- the larger
components of the portfolio. Also, many smaller companies underperformed most
of the year. With a very strong market, investors ignored the strong earnings
growth of the smaller companies and bid up prices of the larger companies
instead. Earnings results for the smaller companies within the Series
generally remained strong all year.

    The performance of the Series' largest sector, technology stocks, reflects
the restructuring occurring throughout corporate America, which has improved
productivity. Much of this restructuring has been made possible by technology
companies, especially software and networking companies, that are helping
their corporate customers reduce costs. Oracle Systems, a database and
applications provider, BMC Software, Computer Associates, and Compuware have
all performed well.

    At the same time, consumer service companies such as HFS, Inc. have also
helped the Series' performance. HFS has acquired companies in the hotel, real
estate, and car rental businesses and produced over 30% internal growth from
revenue opportunities and cost savings. Supplementing this internal growth has
been what we believe is the best acquisition team thus far during the 1990s.
Several acquisitions greatly increased HFS' earnings growth rate in 1996.
While the stock has outperformed the market, its valuation has lagged its
earnings growth rate, making it attractively priced.

    One sector that did not perform as well as expected is health care. HMOs
set their prices too low to ensure revenues in 1996. United Healthcare,
Healthsource, and MidAtlantic Medical all underperformed. We are, however,
optimistic that these companies will benefit from price increases implemented
in 1997.

    Looking ahead, we see a continuation of the slow economic growth that the
United States has been experiencing for the last few years. Although this has
been a slow-growing economy, it has been great for corporate earnings as
restructurings have lowered corporate costs and improved margins. Many of the
smaller companies, having lower costs, can thereby capitalize on this trend.
We believe technology and outsourcing companies, which are large holdings for
the Series, can continue to benefit from these developments.

PORTFOLIO MANAGERS' PROFILES

John Ballen began his career at Massachusetts Financial Services (MFS) as an
industry specialist in 1984. A graduate of Harvard College, the University of
New South Wales, and the Stanford University Graduate School of Business
Administration, he was promoted to Investment Officer in 1986, Vice President
- - Investments in 1987, Director of Research in 1988, and Senior Vice President
in 1990. In 1993, he became Director of Equity Portfolio Management and in
1995 he became Chief Equity Officer. He has managed MFS Emerging Growth Series
since its inception in 1995.

Toni Y. Shimura joined the MFS Research Department in 1987. A graduate of
Wellesley College and of Massachusetts Institute of Technology's Sloan School
of Management, she was promoted to Investment Officer in 1990, Assistant Vice
President - Investments in 1991, and Vice President - Investments in 1992. She
has managed MFS Emerging Growth Series since 1995.

DIVIDENDS-RECEIVED DEDUCTION

The MFS Emerging Growth Series has designated $90,363 as a long-term capital
gain.

For the year ended December 31, 1996, the amount of distributions from income
eligible for the 70% dividends-received deduction for corporations came to
2.63%.

PERFORMANCE SUMMARY

The information below illustrates the historical performance of MFS Emerging
Growth Series shares in comparison to various market indicators. Benchmark
comparisons are unmanaged and do not reflect any fees or expenses. You cannot
invest in an index.

GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT
(For the Period from August 1, 1995 to December 31, 1996)

               MFS                             Consumer       
               Emerging         S&P 500        Price          
               Growth           Composite      Index -        Russell
Date           Series           Index          U.S.           2000
- ----           -------          ---------      --------       -------
 8/95          10000.0          10000.0        10000.0        10000.0
12/95          11740.0          11063.0        10059.0        10614.0
 3/96          12543.0          11659.0        10198.0        11156.0
 6/96          13510.0          12177.0        10272.0        11714.0
 9/96          13973.0          12548.0        10348.0        11754.0
12/96          13739.0          13591.0        10420.0        12365.0


AVERAGE ANNUAL TOTAL RETURNS AS OF DECEMBER 31, 1996

                                              1 Year                 Life+
- ---------------------------------------------------------------------------
MFS Emerging Growth Series                   +17.02%              +24.67%
- ---------------------------------------------------------------------------
Russell 2000 Total Return Index++            +16.35%              +16.14%
- ---------------------------------------------------------------------------
Standard & Poor's 500 Composite Index++      +22.64%              +24.13%
- ---------------------------------------------------------------------------
Consumer Price Index*++                      + 3.56%              + 2.80%
- ---------------------------------------------------------------------------
 +For the period from the commencement of investment operations, July 24, 1995
  to December 31, 1996.
 *The Consumer Price Index is a popular measure of change in prices.
++Source: CDA/Wiesenberger. Benchmark comparisons begin on 8/1/96.

Returns shown do not reflect the deduction of the mortality and expense risk
charges and administration fees. Please refer to the product's annual report
for performance that reflects the fees and charges imposed by insurance
company separate accounts.

Investment return and principal value will fluctuate, and shares, when
redeemed, may be worth more or less than their original cost. Past performance
is no guarantee of future results.

Series results reflect any applicable expense subsidies and waivers, without
which the performance results would have been less favorable. Subsidies and
waivers may be rescinded at any time. See the prospectus for details.
<PAGE>
PORTFOLIO OF INVESTMENTS - December 31, 1996

Stocks - 91.7%
- -----------------------------------------------------------------------------
Issuer                                                   Shares         Value
- -----------------------------------------------------------------------------
U.S. Stocks - 86.9%
  Apparel and Textiles - 0.1%
    Nine West Group, Inc.*                                2,700  $    125,213
- -----------------------------------------------------------------------------
  Automotive
    APS Holding Corp., "A"*                               2,000  $     31,000
- -----------------------------------------------------------------------------
  Business Machines - 2.5%
    Affiliated Computer Co.*                             32,400  $    963,900
    Sun Microsystems, Inc.*                              62,900     1,615,744
                                                                 ------------
                                                                 $  2,579,644
- -----------------------------------------------------------------------------
  Business Services - 11.8%
    ADT, Ltd.*                                           37,800  $    864,675
    Accustaff, Inc.*                                     49,400     1,043,575
    Alco Standard Corp.                                   9,400       485,275
    CUC International, Inc.                              55,000     1,306,250
    Computer Sciences, Inc.*                             11,000       903,375
    DST Systems, Inc.*                                   28,300       887,912
    Employee Solutions, Inc.*                            27,600       565,800
    Equity Corporation International*                     2,100        42,000
    Forrester Research, Inc.*                               400        10,300
    International Network Services*                         200         6,038
    Learning Tree International, Inc.*                   76,600     2,259,700
    Loewen Group, Inc.                                    9,600       375,600
    Nu Skin Asia, Inc., "A"*                                500        15,438
    Sabre Group Holdings, Inc.*                           3,900       108,712
    Superior Consultant Holdings Corp.*                     800        19,800
    Technology Solutions Co.*                            73,650     3,056,475
    Thermo Fibergen, Inc.*                                6,200        65,100
    Transaction System Architects, Inc., "A"*            11,300       375,725
                                                                 ------------
                                                                 $ 12,391,750
- -----------------------------------------------------------------------------
  Chemicals - 0.3%
    Betzdearborn, Inc.                                    5,000  $    292,500
- -----------------------------------------------------------------------------
  Computer Software - Personal Computers - 3.6%
    Autodesk, Inc.                                          285  $      7,980
    First Data Corp.                                     39,600     1,445,400
    Microsoft Corp.*                                     27,550     2,276,319
    Spectrum Holobyte Industries, Inc.*                   1,000         7,500
                                                                 ------------
                                                                 $  3,737,199
- -----------------------------------------------------------------------------
  Computer Software - Systems - 21.6%
    Adobe Systems, Inc.                                   2,800  $    104,650
    BMC Software, Inc.*                                 119,600     4,948,450
    Cadence Design Systems, Inc.*                        48,675     1,934,831
    Computer Associates International, Inc.              87,900     4,373,025
    Compuware Corp.*                                     36,700     1,839,588
    Information Management Resources, Inc.*                 500        10,562
    Ingram Micro, Inc., "A"*                              1,400        32,200
    Oracle Systems Corp.*                               135,800     5,669,650
    Parametric Technology Co.*                           27,900     1,433,362
    Sterling Software, Inc.*                             21,500       679,938
    Sybase, Inc.*                                        16,350       272,841
    Synopsys, Inc.*                                      15,600       721,500
    USCS International, Inc.*                             7,900       133,312
    Viasoft, Inc.*                                        5,900       278,775
    Xionics Document Technologies, Inc.*                 19,000       237,500
                                                                 ------------
                                                                 $ 22,670,184
- -----------------------------------------------------------------------------
  Construction Services - 0.8%
    Shaw Group Inc.*                                     35,000  $    818,125
- -----------------------------------------------------------------------------
  Consumer Goods and Services - 2.8%
    Carson, Inc.*                                        63,600  $    882,450
    Service Corp. International                           3,500        98,000
    Tyco International Ltd.                              37,500     1,982,813
                                                                 ------------
                                                                 $  2,963,263
- -----------------------------------------------------------------------------
  Electronics - 7.5%
    Actel Corp.*                                          9,000  $    213,750
    Altera Corp.*                                        25,100     1,824,456
    Analog Devices, Inc.*                                26,200       887,525
    Atmel Corp.*                                         11,700       387,562
    Intel Corp.                                           5,300       693,969
    LSI Logic Corp.*                                     24,300       650,025
    Lattice Semiconductor Corp.*                         15,200       699,200
    Linear Technology Corp.                              18,100       794,138
    Novellus Systems, Inc.*                               1,600        89,200
    Teradyne, Inc.*                                      17,800       433,875
    Ultratech Stepper, Inc.*                              6,200       147,250
    VLSI Technology, Inc.*                               23,700       565,837
    Xilinx, Inc.*                                        14,300       526,419
                                                                 ------------
                                                                 $  7,913,206
- -----------------------------------------------------------------------------
  Entertainment - 2.1%
    Cox Radio, Inc., "A"*                                20,700  $    362,250
    Harrah's Entertainment, Inc.*                        19,700       391,537
    Heritage Media Corp., "A"*                           17,100       192,375
    International Speedway Corp., "A"*                      500        10,250
    Jacor Communications, Inc.*                           3,900       106,763
    LIN Television Corp.*                                21,100       891,475
    Sinclair Broadcasting Group, Inc., "A"*               3,500        91,000
    Univision Communications, Inc.*                       4,800       177,600
                                                                 ------------
                                                                 $  2,223,250
- -----------------------------------------------------------------------------
  Financial Institutions - 1.8%
    Associates First Capital Corp.*                      13,900  $    613,337
    Dean Witter Discover & Co.                            5,700       377,625
    Franklin Resources, Inc.                              2,000       136,750
    MBNA Corp.                                           18,300       759,450
                                                                 ------------
                                                                 $  1,887,162
- -----------------------------------------------------------------------------
  Food and Beverage Products - 0.7%
    Earthgrains Co.                                      13,400  $    700,150
- -----------------------------------------------------------------------------
  Machinery - 0.2%
    SI Handling Systems, Inc.                            15,700  $    236,481
- -----------------------------------------------------------------------------
  Medical and Health Products - 0.1%
    Ventritex, Inc.*                                      3,900  $     96,038
- -----------------------------------------------------------------------------
  Medical and Health Technology and Services - 8.6%
    Columbia/HCA Healthcare Corp.                           150  $      6,112
    Foundation Health Corp.*                                200         6,350
    Healthsource, Inc.*                                  15,900       208,688
    Healthsouth Corp.*                                   51,500     1,989,188
    Pacificare Health Systems, Inc., "B"*                20,400     1,739,100
    St. Jude Medical, Inc.*                               8,300       353,787
    United Healthcare Corp.                             103,500     4,657,500
                                                                 ------------
                                                                 $  8,960,725
- -----------------------------------------------------------------------------
  Oil Services
    National-Oilwell, Inc.*                                 500  $     15,375
    Offshore Energy Development Corp.*                      100         1,525
                                                                 ------------
                                                                 $     16,900
- -----------------------------------------------------------------------------
  Oils - 0.2%
    Barrett Resources Corp.*                              4,200  $    179,025
    Titan Exploration, Inc.*                              2,600        31,200
                                                                 ------------
                                                                 $    210,225
- -----------------------------------------------------------------------------
  Pollution Control - 0.8%
    Republic Industries, Inc.*                              200  $      6,237
    USA Waste Services, Inc.*                            26,300       838,312
                                                                 ------------
                                                                 $    844,549
- -----------------------------------------------------------------------------
  Printing and Publishing
    Pulitzer Publishing Co.                                   1  $         46
- -----------------------------------------------------------------------------
  Railroads - 0.9%
    Kansas City Southern Industries, Inc.                14,600  $    657,000
    Wisconsin Central Transportation Corp.*               7,900       313,038
                                                                 ------------
                                                                 $    970,038
- -----------------------------------------------------------------------------
  Restaurants and Lodging - 6.2%
    Applebee's International, Inc.*                      22,100  $    607,750
    HFS, Inc.*                                           92,100     5,502,975
    Promus Hotel Corp.*                                   5,900       174,787
    Renaissance Hotel Group N.V.*                         7,500       176,250
    U.S. Franchise Systems, Inc., "A"*                      500         5,063
                                                                 ------------
                                                                 $  6,466,825
- -----------------------------------------------------------------------------
  Stores - 3.0%
    BT Office Products International, Inc.*               1,700  $     15,087
    Corporate Express, Inc.*                             26,400       777,150
    General Nutrition Cos., Inc.*                        20,600       347,625
    Hollywood Entertainment, Corp.*                       2,300        42,550
    Linens "N" Things, Inc.*                              3,500        68,688
    Mazel Stores, Inc.*                                     300         6,750
    Micro Warehouse, Inc.*                                  800         9,400
    Office Depot, Inc.*                                  20,500       363,875
    Staples, Inc.*                                       85,600     1,546,150
                                                                 ------------
                                                                 $  3,177,275
- -----------------------------------------------------------------------------
  Telecommunications - 11.3%
    3Com Corp.*                                          19,100  $  1,401,462
    Bay Networks, Inc.*                                     400         8,350
    Cabletron Systems, Inc.*                             56,400     1,875,300
    Cisco Systems, Inc.*                                 69,500     4,421,938
    Glenayre Technologies, Inc.*                         40,800       879,750
    Lucent Technologies, Inc.                            11,100       513,375
    Tel-Save Holdings, Inc.*                                400        11,600
    Worldcom, Inc.*                                     106,800     2,783,475
                                                                 ------------
                                                                 $ 11,895,250
- -----------------------------------------------------------------------------
Total U.S. Stocks                                                $ 91,206,998
- -----------------------------------------------------------------------------
Foreign Stocks - 4.8%
  Canada - 0.9%
    BioChem Pharma, Inc. (Medical and Health
      Products)*                                         19,650  $    987,413
- -----------------------------------------------------------------------------
  Germany - 1.2%
    SAP AG (Computer Software - Systems)                  8,125  $  1,118,540
    SAP AG, ADR (Computer Software - Systems)##           3,300       152,212
                                                                 ------------
                                                                 $  1,270,752
- -----------------------------------------------------------------------------
  Italy - 0.6%
    Fila Holdings S.p.A., ADR (Apparel and Textiles)     10,150  $    589,969
- -----------------------------------------------------------------------------
  Netherlands - 0.1%
    Gucci Group N.V. (Apparel and Textiles)*              1,500  $     95,813
- -----------------------------------------------------------------------------
  United Kingdom - 2.0%
    Danka Business Systems PLC, ADR (Business
      Services)                                          37,100  $  1,312,412
    Pace Micro Technology PLC (Electronics)*            194,000       764,418
                                                                 ------------
                                                                 $  2,076,830
- -----------------------------------------------------------------------------
Total Foreign Stocks                                             $  5,020,777
- -----------------------------------------------------------------------------
Total Stocks (Identified Cost, $94,818,903)                      $ 96,227,775
- -----------------------------------------------------------------------------

Rights
- -----------------------------------------------------------------------------
  Thermo Fibergen, Inc. (Business Services)*
    (Identified Cost, $12,234)                            6,200  $     15,500
- -----------------------------------------------------------------------------

Warrants - 2.4%
- -----------------------------------------------------------------------------
  Intel Corp. (Electronics)* (Identified Cost,
    $1,911,513)                                          26,800  $  2,472,300
- -----------------------------------------------------------------------------

Convertible Bond
- -----------------------------------------------------------------------------
                                               Principal Amount
                                                  (000 Omitted)
- -----------------------------------------------------------------------------
  Ventritex, Inc., 5.75s, 2001 (Medical and Health
    Products) (Identified Cost, $20,000)               $     20  $     30,925
- -----------------------------------------------------------------------------

Short-Term Obligations - 18.3%
- -----------------------------------------------------------------------------
  Federal Home Loan Mortgage Corp.,
    due 1/06/97 - 1/30/97                              $  7,000  $  6,962,672
  Student Loan Marketing Assn., due 1/02/97              12,210    12,205,760
- -----------------------------------------------------------------------------
Total Short-Term Obligations, at Amortized Cost                  $ 19,168,432
- -----------------------------------------------------------------------------
Total Investments (Identified Cost, $115,931,082)                $117,914,932

Other Assets, Less Liabilities - (12.4)%                          (12,958,628)
- -----------------------------------------------------------------------------
Net Assets - 100.0%                                              $104,956,304
- -----------------------------------------------------------------------------
 *Non-income producing security.
##SEC Rule 144A restriction.

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS

Statement of Assets and Liabilities
- ------------------------------------------------------------------------------
December 31, 1996
- ------------------------------------------------------------------------------
Assets:
  Investments, at value (identified cost, $115,931,082)         $117,914,932
  Cash                                                                 6,202
  Receivable for Series shares sold                                1,277,098
  Interest and dividends receivable                                   31,458
  Receivable from investment adviser                                  61,869
  Deferred organization expenses                                       6,546
  Other assets                                                            42
                                                                ------------
      Total assets                                              $119,298,147
                                                                ------------
Liabilities:
  Payable for Series shares reacquired                          $    561,351
  Payable for investments purchased                               13,706,027
  Payable to affiliate for management fee                              6,364
  Accrued expenses and other liabilities                              68,101
                                                                ------------
      Total liabilities                                         $ 14,341,843
                                                                ------------
Net assets                                                      $104,956,304
                                                                ============
Net assets consist of:
  Paid-in capital                                               $103,393,432
  Unrealized appreciation on investments                           1,983,850
  Accumulated net realized loss on investments and foreign
    currency transactions                                           (420,978)
                                                                ------------
      Total                                                     $104,956,304
                                                                ============
Shares of beneficial interest outstanding                        7,928,680
                                                                 =========

Net asset value per share
  (net assets of $104,956,304 / 7,928,680 shares of
  beneficial interest outstanding)                                $13.24
                                                                  ======

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS - continued

Statement of Operations
- ------------------------------------------------------------------------------
Year Ended December 31, 1996
- ------------------------------------------------------------------------------
Net investment income:
  Income -
    Interest                                                       $  351,048
    Dividends                                                          37,634
    Foreign taxes withheld                                             (1,125)
                                                                   ----------
      Total investment income                                      $  387,557
                                                                   ----------
  Expenses -
    Management fee                                                 $  314,262
    Trustees' compensation                                              2,033
    Shareholder servicing agent fee                                    14,380
    Printing                                                           65,001
    Auditing fees                                                      29,156
    Custodian fee                                                      17,940
    Amortization of organization expenses                               1,842
    Legal fees                                                          1,421
    Miscellaneous                                                      37,062
                                                                   ----------
      Total expenses                                               $  483,097
    Fees paid indirectly                                               (1,120)
    Reduction of expenses by investment adviser                       (62,962)
                                                                   ----------
      Net expenses                                                 $  419,015
                                                                   ----------
        Net investment loss                                        $  (31,458)
                                                                   ----------
Realized and unrealized gain (loss) on investments:
  Realized gain (loss) (identified cost basis) -
    Investment transactions                                        $  504,626
    Foreign currency transactions                                      (1,029)
                                                                   ----------
      Net realized gain on investments and foreign currency
        transactions                                               $  503,597
                                                                   ----------
  Change in unrealized appreciation on investments                 $1,810,131
                                                                   ----------
    Net realized and unrealized gain on investments and
      foreign currency                                             $2,313,728
                                                                   ----------
      Increase in net assets from operations                       $2,282,270
                                                                   ==========

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS - continued

<TABLE>
<CAPTION>
Statements of Changes in Net Assets
- ------------------------------------------------------------------------------------------------------------------
                                                                                Year Ended            Period Ended
                                                                         December 31, 1996      December 31, 1995*
- ------------------------------------------------------------------------------------------------------------------
Increase (decrease) in net assets:
<S>                                                                           <C>                      <C>        
From operations -
  Net investment income (loss)                                                $    (31,458)            $       877
  Net realized gain on investments and foreign currency transactions               503,597                  81,576
  Net unrealized gain on investments                                             1,810,131                 173,719
                                                                              ------------             -----------
    Increase in net assets from operations                                    $  2,282,270             $   256,172
                                                                              ------------             -----------
Distributions declared to shareholders -
  From net investment income                                                  $   --                   $      (877)
  From net realized gain on investments and foreign currency transactions         (503,597)                (81,576)
  In excess of net investment income                                             --                           (283)
  In excess of net realized gain on investments and foreign currency
    transactions                                                                  (374,343)               --
  Tax return of capital                                                          --                        (21,847)
                                                                              ------------             -----------
      Total distributions declared to shareholders                            $   (877,940)            $  (104,583)
                                                                              ------------             -----------
Series share (principal) transactions -
  Net proceeds from sale of shares                                            $149,594,616             $ 5,564,342
  Net asset value of shares issued to shareholders in reinvestment of
    distributions                                                                  877,940                 104,583
  Cost of shares reacquired                                                    (50,789,212)             (1,960,484)
                                                                              ------------             -----------
    Increase in net assets from Series share transactions                     $ 99,683,344             $ 3,708,441
                                                                              ------------             -----------
      Total increase in net assets                                            $101,087,674             $ 3,860,030
Net assets:
  At beginning of period                                                         3,868,630                   8,600
                                                                              ------------             -----------
  At end of period                                                            $104,956,304             $ 3,868,630
                                                                              ============             ===========

*For the period from the commencement of investment operations, July 24, 1995 to December 31, 1995.
</TABLE>

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS - continued

<TABLE>
<CAPTION>
Financial Highlights
- -----------------------------------------------------------------------------------------------------------
                                                                             Year Ended        Period Ended
                                                                      December 31, 1996  December 31, 1995*
- -----------------------------------------------------------------------------------------------------------
Per share data (for a share outstanding throughout each period):
<S>                                                                             <C>                 <C>   
Net asset value - beginning of period                                           $11.41              $10.00
                                                                                ------              ------
Income from investment operations# -
  Net investment income (loss)(S)                                               $(0.01)             $ 0.01
  Net realized and unrealized gain on investments and foreign currency
    transactions                                                                  1.95                1.74
                                                                                ------              ------
    Total from investment operations                                            $ 1.94              $ 1.75
                                                                                ------              ------
Less distributions declared to shareholders -
  From net investment income                                                    $ --                $(0.01)
  From net realized gain on investments and foreign currency
    transactions                                                                 (0.06)              (0.26)
  In excess of net realized gain on investments and foreign currency
    transactions                                                                 (0.05)               --
  Tax return of capital                                                           --                 (0.07)
                                                                                ------              ------
    Total distributions declared to shareholders                                $(0.11)             $(0.34)
                                                                                ------              ------
Net asset value - end of period                                                 $13.24              $11.41
                                                                                ======              ======
Total return                                                                    17.02%              17.41%++
Ratios (to average net assets)/Supplemental data(S):
  Expenses                                                                       1.00%               1.00%+
  Net investment income (loss)                                                 (0.08)%               0.10%+
Portfolio turnover                                                                 96%                 73%
Average commission rate###                                                     $0.0401               --
Net assets at end of period (000 omitted)                                     $104,956              $3,869

  *For the period from the commencement of investment operations, July 24, 1995 to December 31, 1995.
  +Annualized.
 ++Not annualized.
  #Per share data is based on average shares outstanding.
###Average commission rate is calculated for Series' with fiscal years beginning on or after September 1, 1995.
(S)The adviser voluntarily agreed to maintain the expenses of the Series at not more than 1.00% of average daily
   net assets. To the extent actual expenses were over these limitations, the net investment loss per share and
   the ratios would have been:
   Net investment loss                                                          $(0.03)             $(0.18)
   Ratios (to average net assets):
     Expenses                                                                    1.16%               2.91%+
     Net investment loss                                                       (0.23)%             (1.78)%+
</TABLE>

See notes to financial statements
<PAGE>
NOTES TO FINANCIAL STATEMENTS

(1) Business and Organization
MFS Emerging Growth Series (the Series) is a diversified series of MFS
Variable Insurance Trust (the Trust) which is comprised of the following 12
series: MFS Bond Series, MFS Emerging Growth Series, MFS Growth with Income
Series, MFS High Income Series, MFS Limited Maturity Series, MFS Money Market
Series, MFS Research Series, MFS Strategic Fixed Income Series, MFS Total
Return Series, MFS Utilities Series, MFS Value Series, and MFS World
Governments Series. The Trust is organized as a Massachusetts business trust
and is registered under the Investment Company Act of 1940, as amended, as an
open-end management investment company.

The shareholders of each Series of the Trust are separate accounts of
insurance companies which offer variable annuity and/or life insurance
products. As of December 31, 1996 there were 31 shareholders in the Series.

(2) Significant Accounting Policies
General - The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.
Investments in foreign securities are vulnerable to the effects of changes in
the relative values of the local currency and the U.S. dollar and to the
effects of changes in each country's legal, political and economic
environment.

Investment Valuations - Equity securities listed on securities exchanges or
reported through the NASDAQ system are valued at last sales prices. Unlisted
equity securities or listed equity securities for which last sale prices are
not available are valued at last quoted bid prices. Debt securities (other
than short-term obligations which mature in 60 days or less), including listed
issues, are valued on the basis of valuations furnished by dealers or by a
pricing service with consideration to factors such as institutional-size
trading in similar groups of securities, yield, quality, coupon rate,
maturity, type of issue, trading characteristics and other market data,
without exclusive reliance upon exchange or over-the-counter prices. Short-
term obligations, which mature in 60 days or less, are valued at amortized
cost, which approximates market value.  Securities for which there are no such
quotations or valuations are valued at fair value as determined in good faith
by or at the direction of the Trustees.

Foreign Currency Translation - Investment valuations, other assets, and
liabilities initially expressed in foreign currencies are converted each
business day into U.S. dollars based upon current exchange rates. Purchases
and sales of foreign investments, income and expenses are converted into U.S.
dollars based upon currency exchange rates prevailing on the respective dates
of such transactions. Gains and losses attributable to foreign currency
exchange rates on sales of securities are recorded for financial statement
purposes as net realized gains and losses on investments. Gains and losses
attributable to foreign exchange rate movements on income and expenses are
recorded for financial statement purposes as foreign currency transaction
gains and losses. That portion of both realized and unrealized gains and
losses on investments that result from fluctuations in foreign currency
exchange rates is not separately disclosed.

Deferred Organization Expenses - Costs incurred by the Series in connection
with its organization have been deferred and are being amortized on a
straight-line basis over a five-year period beginning on the date of
commencement of Series operations.

Forward Foreign Currency Exchange Contracts - The Series may enter into
forward foreign currency exchange contracts for the purchase or sale of a
specific foreign currency at a fixed price on a future date. Risks may arise
upon entering into these contracts from the potential inability of
counterparties to meet the terms of their contracts and from unanticipated
movements in the value of a foreign currency relative to the U.S. dollar. The
Series will enter into forward contracts for hedging purposes as well as for
non-hedging purposes. For hedging purposes, the Series may enter into
contracts to deliver or receive foreign currency it will receive from or
require for its normal investment activities. The Series may also use
contracts in a manner intended to protect foreign currency-denominated
securities from declines in value due to unfavorable exchange rate movements.
For non-hedging purposes, the Series may enter into contracts with the intent
of changing the relative exposure of the Series' portfolio of securities to
different currencies to take advantage of anticipated changes. The forward
foreign currency exchange contracts are adjusted by the daily exchange rate of
the underlying currency and any gains or losses are recorded for financial
statement purposes as unrealized until the contract settlement date.

Investment Transactions and Income - Investment transactions are recorded on
the trade date. Interest income is recorded on the accrual basis. All premium
and original issue discount are amortized or accreted for financial statement
and tax reporting purposes as required by federal income tax regulations.
Dividend income is recorded on the ex-dividend date for dividends received in
cash. Dividend and interest payments received in additional securities are
recorded on the ex-dividend or ex-interest date in an amount equal to the
value of the security on such date.

Fees Paid Indirectly - The Series' custodian bank calculates its fee based on
the Series' average daily net assets. This fee is reduced according to an
expense offset arrangement with State Street Bank, the dividend disbursing
agent, which provides for partial reimbursement of custody fees based on a
formula developed to measure the value of cash deposited by the Series with
the custodian and with the dividend disbursing agent. This amount is shown as
a reduction of expenses on the Statement of Operations.

Tax Matters and Distributions - The Series' policy is to comply with the
provisions of the Internal Revenue Code (the Code) applicable to regulated
investment companies and to distribute to shareholders all of its taxable
income, including any net realized gain on investments. Accordingly, no
provision for federal income or excise tax is provided. The Series files a tax
return annually using tax accounting methods required under provisions of the
Code which may differ from generally accepted accounting principles, the basis
on which these financial statements are prepared. Accordingly, the amount of
net investment income and net realized gain reported on these financial
statements may differ from that reported on the Series' tax return and,
consequently, the character of distributions to shareholders reported in the
financial highlights may differ from that reported to shareholders on Form
1099-DIV. Foreign taxes have been provided for on interest and dividend income
earned on foreign investments in accordance with the applicable country's tax
rates and to the extent unrecoverable are recorded as a reduction of
investment income. The Series expects to pass through to shareholders foreign
income taxes paid. The election increases the taxable distributions of the
Series by the amount of foreign taxes paid. An individual shareholder who
itemizes deductions, or a corporate shareholder, will be able to claim an
offsetting deduction or tax credit (but not both) on their federal income tax
returns. Individuals who do not itemize deductions may claim a foreign tax
credit but not a deduction. The foreign source income is considered passive
income for the purpose of computing the foreign tax credit limitations.
Distributions to shareholders are recorded on the ex-dividend date.

The Series distinguishes between distributions on a tax basis and a financial
reporting basis and requires that only distributions in excess of tax basis
earnings and profits are reported in the financial statements as a tax return
of capital. Differences in the recognition or classification of income between
the financial statements and tax earnings and profits which result in
temporary over-distributions for financial statement purposes, are classified
as distributions in excess of net investment income or accumulated net
realized gains. During the year ended December 31, 1996, $46,635 was
reclassified from accumulated net realized loss on investments and foreign
currency transactions and $15,177 and $31,458 were reclassified to paid-in
capital and accumulated net investment loss, respectively, due to differences
between book and tax accounting for reclass of net operating loss and currency
transactions. This change had no effect on the net assets or net asset value
per share. At December 31, 1996, accumulated net realized loss on investments
and foreign currency transactions under book accounting were different from
tax accounting due to temporary differences in accounting for wash sales.

(3) Transactions with Affiliates
Investment Adviser - The Series has an investment advisory agreement with
Massachusetts Financial Services Company (MFS) to provide overall investment
advisory and administrative services, and general office facilities. The
management fee is computed daily and paid monthly at an annual rate of 0.75% of
average daily net assets. Under a temporary expense limitation agreement with
MFS, MFS has voluntarily agreed to pay all of the Series' operating expenses,
exclusive of management fees, which exceed 0.25% of the Series' average daily
net assets. The Series in turn will pay MFS an expense reimbursement fee not
greater than 0.25% of the Series' average daily net assets. To the extent that
the expense reimbursement fee exceeds the Series' actual expenses, the excess
will be applied to amounts paid by MFS in prior years. At December 31, 1996, the
aggregate unreimbursed expenses owed to MFS by the Series amounted to $78,621,
including $62,962 incurred in the current year.

The Series pays no compensation directly to its Trustees who are officers of
the investment adviser, or to officers of the Series, all of whom receive
remuneration for their services to the Series from MFS. Certain officers and
Trustees of the Series are officers or directors of MFS and MFS Service
Center, Inc. (MFSC).

Shareholder Servicing Agent - MFSC, a wholly owned subsidiary of MFS, earns a
fee for its services as shareholder servicing agent. The fee is calculated as
a percentage of the average daily net assets at an effective annual rate of up
to 0.035%.

(4) Portfolio Securities
Purchases and sales of investments, other than U.S. government securities,
purchased option transactions and short-term obligations, aggregated
$128,473,774 and $35,416,621, respectively.

The cost and unrealized appreciation or depreciation in value of the
investments owned by the Series, as computed on a federal income tax basis,
are as follows:

Aggregate cost                                                   $115,931,082
                                                                 ============
Gross unrealized appreciation                                    $  6,064,316
Gross unrealized depreciation                                      (4,080,466)
                                                                 ------------
  Net unrealized appreciation                                    $  1,983,850
                                                                 ============

(5) Shares of Beneficial Interest
The Series' Declaration of Trust permits the Trustees to issue an unlimited
number of full and fractional shares of beneficial interest (without par
value). Transactions in Series shares were as follows:

<TABLE>
<CAPTION>
                                         Year Ended                          Period Ended
                                         December 31, 1996                   December 31, 1995*
                                         ----------------------------------  -------------------------------
                                                 Shares             Amount         Shares            Amount
- ------------------------------------------------------------------------------------------------------------
<S>                                          <C>              <C>                 <C>           <C>        
Shares sold                                  11,363,299       $149,594,616        501,081       $ 5,564,342
Shares issued to shareholders in
 reinvestment of distributions                   66,160            877,940          9,255           104,583
Shares reacquired                            (3,839,801)       (50,789,212)      (172,174)       (1,960,484)
                                             ----------       ------------        -------       -----------
  Net increase                                7,589,658       $ 99,683,344        338,162       $ 3,708,441
                                             ==========       ============        =======       ===========

*For the period from the commencement of investment operations, July 24, 1995 to December 31, 1995.
</TABLE>

(6) Line of Credit
The Series entered into an agreement which enables it to participate with
other funds managed by MFS in an unsecured line of credit with a bank which
permits borrowings up to $350 million, collectively. Borrowings may be made to
temporarily finance the repurchase of Series shares. Interest is charged to
each fund, based on its borrowings, at a rate equal to the bank's base rate.
In addition, a commitment fee, based on the average daily unused portion of
the line of credit, is allocated among the participating funds at the end of
each quarter. The commitment fee allocated to the Series for the year ended
December 31, 1996 was $504.
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Trustees of MFS Variable Insurance Trust and Shareholders of MFS
Emerging Growth Series:

We have audited the accompanying statement of assets and liabilities,
including the portfolio of investments, of MFS Emerging Growth Series (the
Series) (one of the series constituting the MFS Variable Insurance Trust) as
of December 31, 1996, the related statement of operations for the year then
ended, the statements of changes in net assets and financial highlights for
the year then ended and for the period from July 24, 1995 (the commencement of
investment operations) to December 31, 1995. These financial statements and
financial highlights are the responsibility of the Series' management. Our
responsibility is to express an opinion on these financial statements and
financial highlights based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements and
financial highlights are free of material misstatement. An audit includes
examining, on a test basis, evidence supporting the amounts and disclosures in
the financial statements. Our procedures included confirmation of the
securities owned at December 31, 1996 by correspondence with the custodian and
brokers; where replies were not received from brokers, we performed other
auditing procedures. An audit also includes assessing the accounting
principles used and significant estimates made by management, as well as
evaluating the overall financial statement presentation. We believe that our
audits provide a reasonable basis for our opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of MFS Emerging
Growth Series at December 31, 1996, the results of its operations, the changes
in its net assets, and its financial highlights for the respective stated
periods in conformity with generally accepted accounting principles.

DELOITTE & TOUCHE LLP

Boston, Massachusetts
February 7, 1997

                ---------------------------------------------
This report is prepared for the general information of shareholders. It is
authorized for distribution to prospective investors only when preceded or
accompanied by a current prospectus.
<PAGE>




                                                                  VEG 2/97 16.5M



<PAGE>
[logo] M F S(SM)                                                  ANNUAL REPORT
INVESTMENT MANAGEMENT                                            FOR YEAR ENDED
                                                              DECEMBER 31, 1996
MFS(R) VALUE SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST


[Graphic Omitted]
<PAGE>
MFS(R) VALUE SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST

<TABLE>
<C>                                                                 <C>
TRUSTEES                                                            INVESTMENT ADVISER
A. Keith Brodkin*                                                   Massachusetts Financial Services Company
Chairman and President                                              500 Boylston Street
                                                                    Boston, MA 02116-3741
Nelson J. Darling, Jr.
Trustee, Eastern Enterprises                                        DISTRIBUTOR
(diversified holding company)                                       MFS Fund Distributors, Inc.
                                                                    500 Boylston Street
William R. Gutow                                                    Boston, MA 02116-3741
Vice Chairman,
Capitol Entertainment Management Company                            SHAREHOLDER SERVICE CENTER
(Blockbuster Video Franchise)                                       MFS Service Center, Inc.
                                                                    P.O. Box 1400
PORTFOLIO MANAGER                                                   Boston, MA 02107-9906
John F. Brennan, Jr.*
                                                                    For additional information,
TREASURER                                                           contact your financial adviser.
W. Thomas London*
                                                                    CUSTODIAN
ASSISTANT TREASURER                                                 Investors Bank & Trust Company
James O. Yost*
                                                                    AUDITORS
SECRETARY                                                           Deloitte & Touche LLP
Stephen E. Cavan*
                                                                    WORLD WIDE WEB
ASSISTANT SECRETARY                                                 www.mfs.com
James R. Bordewick, Jr.*

*Affiliated with the Investment Adviser
</TABLE>
<PAGE>
Dear Contract Owner:
The pattern of slow but sustainable growth seen in most of the world in 1996
seems likely to continue in 1997. While it looks like U.S. growth in 1997 will
slow modestly relative to 1996, there is evidence that Europe and, to a lesser
degree, Japan are continuing their recoveries from recession. At the same
time, companies in many emerging markets are reporting robust increases in
earnings as these markets benefit from higher-than-average economic growth and
market reforms. This should continue to provide more opportunities for
development and trade.

    After more than six years of expansion, the U.S. economy appears headed
toward another year of moderate growth in 1997, although a few signs point to
the possibility of a modest increase in inflation during the year. On the
positive side, the pattern of moderate growth and inflation set over the past
few years now seems fairly well entrenched in the economy and, short of a
major international or domestic crisis, appears to have enough momentum to
remain on track for some time. Recent gains in such important sectors as
housing, automobiles, industrial production, and exports indicate a fair
amount of underlying strength in the economy. However, some reason for caution
can be seen in the continuing high level of consumer debt and the attendant
rise in personal bankruptcies, as well as in the modestly disappointing level
of holiday sales. Furthermore, the ongoing tightness in labor markets, and
price rises in such important sectors as energy, could add some inflationary
pressures to the economy. Given these somewhat conflicting indicators, we
expect real (inflation-adjusted) growth to revolve around 2% in 1997, which
would represent a modest decline from 1996.

    We continue to urge U.S. equity investors to lower their expectations for
1997 and to point out that the impressive gains of the past two years are not
sustainable. Just as the slowdown in corporate earnings growth and increases
in interest rates in 1996 raised some near-term concerns, further interest
rate increases and an acceleration of inflation could negatively affect the
stock market in 1997. However, to the extent that some slowdown in earnings
means that the economy is not overheating, this may be beneficial for the
equity market in the long run. Also, we believe many of the technology-driven
productivity gains that U.S. companies have made in recent years will continue
to enhance corporate America's competitiveness and profitability. Therefore,
while we have some near-term concerns, we remain reasonably positive about the
long-term viability of the equity market.

    In U.S. bond markets, conflicting signals over the strength of the economy
have created near-term volatility. Even comments by Federal Reserve Chairman
Alan Greenspan in late 1996 created some uncertainty over the Federal Reserve
Board's next move. We expect the Fed to maintain its anti-inflationary stance
should signs of more rapid economic growth and, particularly, higher inflation
resurface. While inflationary forces largely remained in check in 1996, the
continued strength in the labor market and rising energy prices mean that a
pickup in inflation is still possible. At the same time, the U.S. budget
deficit continues to decline and, as a percentage of gross domestic product,
is now less than 2%, which we consider a positive development for the bond
markets. Although interest rates may move higher over the coming months, we
believe that, at current levels, fixed-income markets remain equitably valued.

    Internationally, the environment of moderate growth, benign inflation, and
fairly steady interest rates is also providing support for investment markets
and should help support valuation levels in the coming year. Throughout the
world, the key to stock market performance in 1997 will be corporate earnings
growth. While U.S. earnings growth is slowing, but still expected to be fairly
healthy, we anticipate that a number of European countries will see an
acceleration in earnings growth and improved valuations in 1997. Despite this
environment, many European countries trade at discounts to the United States.
In particular, we see opportunities in some of the multinationals, and
businesses with the ability to generate steady earnings growth. In Japan, a
recovery appears to be taking place, but at a very modest rate, with
valuations still at high levels. In the emerging markets, the long-term
economic growth story remains intact and, although selectivity is even more
important in these markets, more companies are benefiting from this growth and
trading at below-average global valuations.

    Comments from the portfolio manager of the Series are presented below. We
appreciate your support and welcome any questions or comments you may have.

Respectfully,

/s/A. Keith Brodkin                       /s/John F. Brennan, Jr.
   A. Keith Brodkin                          John F. Brennan, Jr.
   Chairman and President                    Portfolio Manager

January 9, 1997


MFS(R) VALUE SERIES
Over the past 12 months, the three best-performing sectors of the Standard &
Poor's 500 Composite Index (the S&P 500), a popular, unmanaged index of common
stock performance, were technology, which was up 46.9%; financial services, up
35.8%; and industrial goods and services, up 28.9%. The worst-performing
sector was utilities and communications, which gained just 1.6%. The Series
was slightly underweighted in technology versus the S&P 500 (9.0% of the
portfolio versus 12.0% of the S&P 500), slightly underweighted in financial
services (12.1% versus 14.8%), and slightly underweighted in industrial goods
and services (7.1% versus 7.9%). Our overweighting in the utilities and
communications sector (10.9% versus 9.5%) is primarily concentrated in the
cellular industry with a large holding in Cellular Communications
International, a member of the Italian licensee Omnitel.

    Leisure, our largest sector (21.7% of the portfolio), is a diverse mix of
companies and industries. The Series' primary focus is on the gaming and
lodging industry as well as the broadcasting industry. We believe the lodging
industry will continue to exhibit favorable trends over the near term. Supply
continues to be tight, especially for the high-end, full-service hotels, and
demand remains robust. We expect the key measurements of performance, and
occupancy rates to be positive throughout 1997. While the gaming industry's
expansion slowed in 1996, we continue our enthusiasm for long-term prospects.
Harrah's Entertainment is currently one of the more attractively valued
companies in this industry and results should turn more favorable in the
second half of 1997. In the broadcasting industry, our holdings range across
television and radio -- industries which may benefit from recent deregulation.
Ongoing consolidation should aid revenue and costs as pricing flexibility
increases and programming expenses diminish. Our favorite holdings in this
industry are American Radio and LIN Television.

    The Series' industrial goods holdings are focused on the aerospace
industry, which we expect to have a strong runup in profits as the commercial
aircraft cycle evolves over the next several years. We believe BE Aerospace
and BF Goodrich are expected to show strong earnings momentum over this
period.

    International holdings are currently 18% of equities and range across
European and Asian markets. In addition to Cellular Communications
International, other large holdings include Tranz Rail (a New Zealand railway)
and Korea Mobile Telecom (a South Korean cellular franchise).

    Our outlook for the coming year is cautious. With stock market valuations
at record levels and the recent uptick in interest rates, we believe the
market is vulnerable to negative news. Therefore, we are positioned
conservatively.

PORTFOLIO MANAGER'S PROFILE
John F. Brennan, Jr. is Senior Vice President of MFS and manages MFS Value
Series. He joined MFS as an industry specialist in 1985. He was named Vice
President in 1988 and Senior Vice President in 1995. Mr. Brennan is a graduate
of the University of Rhode Island and the Stanford University Graduate School
of Business Administration.

DIVIDENDS-RECEIVED DEDUCTION
For the year ended December 31, 1996, the amount of distributions from income
eligible for the 70% dividends-received deduction for corporations came to
13.82%.

PERFORMANCE SUMMARY
The information below illustrates the historical performance of MFS Value
Series shares in comparison to various market indicators. Benchmark
comparisons are unmanaged and do not reflect any fees or expenses. You cannot
invest in an index.

GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT
(For the Period from August 1, 1996 to December 31, 1996)

                              Consumer
               MFS            Price          S&P 500
               Value          Index -        Composite
Date           Series         U.S.           Index
- ----           -------        --------       ---------
 8/96          10000.0        10000.0        10000.0
 8/96           9960.0        10020.0        10207.0
 9/96          10460.0        10054.0        10778.0
10/96          10370.0        10086.0        11079.0
11/96          10800.0        10105.0        11911.0
12/96          10878.0        10124.0        11674.0


AGGREGATE TOTAL RETURNS AS OF DECEMBER 31, 1996
                                                  Life+
- ---------------------------------------------------------
MFS Value Series                               + 8.78%
- ---------------------------------------------------------
Standard & Poor's 500 Composite Index++        +16.74%
- ---------------------------------------------------------
Consumer Price Index*++                        + 1.24%
- ---------------------------------------------------------
 +For the period from the commencement of investment operations, August 14,
  1996 to December 31, 1996.
++Source: CDA/Wiesenberger.
 *The Consumer Price Index is a popular measure of change in prices.

Returns shown do not reflect the deduction of mortality and expense risk
charges and administrative fees. Please refer to the product's annual report
for performance that reflects the fees and charges imposed by insurance
company separate accounts.

Investment return and principal value will fluctuate, and shares, when
redeemed, may be worth more or less than their original cost. Past performance
is no guarantee of future results.

Series results reflect any applicable expense subsidies and waivers, without
which the performance results would have been less favorable. Subsidies and
waivers may be rescinded at any time. See the prospectus for details.
<PAGE>
PORTFOLIO OF INVESTMENTS - December 31, 1996

Stocks - 91.9%
- -----------------------------------------------------------------------------
Issuer                                                     Shares       Value
- -----------------------------------------------------------------------------
U.S. Stocks - 76.9%
  Advertising - 0.9%
    Outdoor Systems, Inc.*                                    450  $   12,656
- -----------------------------------------------------------------------------
  Aerospace - 3.3%
    AlliedSignal, Inc.                                        200  $   13,400
    BE Aerospace, Inc.*                                     1,100      29,837
    Raytheon Co.                                               20         963
                                                                   ----------
                                                                   $   44,200
- -----------------------------------------------------------------------------
  Agricultural Products - 1.7%
    AGCO Corp.                                                440  $   12,595
    Case Corp.                                                200      10,900
                                                                   ----------
                                                                   $   23,495
- -----------------------------------------------------------------------------
  Automotive - 2.6%
    Ford Motor Co.                                            400  $   12,750
    Goodrich (B.F.) Co.                                       300      12,150
    Harvard Industries, Inc., "B"*                          2,400      10,800
                                                                   ----------
                                                                   $   35,700
- -----------------------------------------------------------------------------
  Banks and Credit Companies - 1.3%
    Wells Fargo & Co.                                          65  $   17,534
- -----------------------------------------------------------------------------
  Business Machines - 0.8%
    Sun Microsystems, Inc.*                                   400  $   10,275
- -----------------------------------------------------------------------------
  Business Services - 2.7%
    ADT Ltd.*                                                 800  $   18,300
    Alco Standard Corp.                                       300      15,487
    Sabre Group Holdings, Inc.*                               100       2,787
                                                                   ----------
                                                                   $   36,574
- -----------------------------------------------------------------------------
  Cellular Telephones - 0.8%
    Telephone & Data Systems, Inc.                            300  $   10,875
- -----------------------------------------------------------------------------
  Chemicals - 1.1%
    Dexter Corp.                                              400  $   12,750
    NL Industries, Inc.                                       200       2,175
                                                                   ----------
                                                                   $   14,925
- -----------------------------------------------------------------------------
  Computer Software - Systems - 3.3%
    Adobe Systems, Inc.                                       300  $   11,213
    Cerner Corp.*                                             600       9,300
    Sybase, Inc.*                                           1,400      23,363
                                                                   ----------
                                                                   $   43,876
- -----------------------------------------------------------------------------
  Consumer Goods and Services - 3.5%
    Philip Morris Cos., Inc.                                  140  $   15,767
    Tyco International Ltd.                                   600      31,725
                                                                   ----------
                                                                   $   47,492
- -----------------------------------------------------------------------------
  Containers - 0.4%
    Stone Container Corp.                                     400  $    5,950
- -----------------------------------------------------------------------------
  Defense Electronics - 0.3%
    Loral Space & Communications Corp.*                       200  $    3,675
- -----------------------------------------------------------------------------
  Electrical Equipment - 0.3%
    Rofin-Sinar Technologies, Inc.*                           300  $    3,525
- -----------------------------------------------------------------------------
  Electronics - 2.4%
    Atmel Corp.*                                              500  $   16,562
    Intel Corp.                                                70       9,166
    Kulicke & Soffa Industries, Inc.*                         100       1,900
    LTX Corp.*                                                700       4,113
                                                                   ----------
                                                                   $   31,741
- -----------------------------------------------------------------------------
  Entertainment - 7.9%
    American Radio Systems Corp., "A"*                        330  $    8,993
    Argosy Gaming Co.*                                        400       1,850
    Casino America, Inc.*                                     800       2,550
    Central European Media Enterprises Ltd.*                  400      12,700
    Chancellor Broadcasting Co., "A"*                         280       6,650
    EZ Communications, Inc., "A"*                             300      10,988
    Golden Bear Golf, Inc.*                                   200       2,250
    Harrah's Entertainment, Inc.*                           1,600      31,800
    Harveys Casino Resorts                                    200       3,375
    LIN Television Corp.*                                     400      16,900
    Showboat, Inc.                                            300       5,175
    Univision Communications, Inc.*                           100       3,700
                                                                   ----------
                                                                   $  106,931
- -----------------------------------------------------------------------------
  Financial Institutions - 3.8%
    Benefical Corp.                                           220  $   13,943
    Federal Home Loan Mortgage Corp.                          200      22,025
    Union Planters Corp.                                      400      15,600
                                                                   ----------
                                                                   $   51,568
- -----------------------------------------------------------------------------
  Food and Beverage Products - 1.3%
    Earthgrains Co.                                           100  $    5,225
    Interstate Bakeries Corp.                                 260      12,772
                                                                   ----------
                                                                   $   17,997
- -----------------------------------------------------------------------------
  Forest and Paper Products - 1.4%
    Kimberly-Clark Corp.                                      200  $   19,050
- -----------------------------------------------------------------------------
  Insurance - 4.4%
    Chubb Corp.                                               240  $   12,900
    CIGNA Corp.                                               100      13,662
    ITT Hartford Group, Inc.                                  200      13,500
    Penncorp Financial Group, Inc.                            520      18,720
                                                                   ----------
                                                                   $   58,782
- -----------------------------------------------------------------------------
  Machinery - 1.1%
    Stewart & Stevenson Services, Inc.                        500  $   14,563
- -----------------------------------------------------------------------------
  Medical and Health Products - 2.6%
    Pharmacia & Upjohn, Inc.                                  360  $   14,265
    Rhone-Poulenc Rorer, Inc.                                 200      15,625
    Uromed Corp.*                                             500       4,875
                                                                   ----------
                                                                   $   34,765
- -----------------------------------------------------------------------------
  Medical and Health Technology and Services - 3.2%
    Pacificare Health Systems, Inc., "B"*                      70  $    5,687
    Regency Health Services, Inc.*                            400       3,850
    St. Jude Medical, Inc.*                                   500      21,312
    United Healthcare Corp.                                   260      11,700
                                                                   ----------
                                                                   $   42,549
- -----------------------------------------------------------------------------
  Oil Services - 0.3%
    Tidewater, Inc.                                           100  $    4,525
- -----------------------------------------------------------------------------
  Oils - 1.8%
    Occidental Petroleum Corp.                                500  $   11,688
    Texaco, Inc.                                              130      12,756
                                                                   ----------
                                                                   $   24,444
- -----------------------------------------------------------------------------
  Photographic Products - 0.6%
    Eastman Kodak Co.                                         100  $    8,025
- -----------------------------------------------------------------------------
  Printing and Publishing - 1.9%
    Gannett Co., Inc.                                         170  $   12,729
    Pulitzer Publishing Co.                                   101       4,684
    Scripps (E.W.) Co., "A"                                   245       8,575
                                                                   ----------
                                                                   $   25,988
- -----------------------------------------------------------------------------
  Railroads - 1.9%
    Burlington Northern-Santa Fe                              160  $   13,820
    Wisconsin Central Transportation Corp.*                   300      11,887
                                                                   ----------
                                                                   $   25,707
- -----------------------------------------------------------------------------
  Restaurants and Lodging - 6.9%
    Host Marriott Corp.*                                    2,320  $   37,120
    Prime Hospitality Corp.*                                1,000      16,125
    Promus Hotel Corp.*                                       800      23,700
    Renaissance Hotel Group N.V.*                             100       2,350
    Servico, Inc.*                                            600       9,675
    Showbiz Pizza Time, Inc.*                                 200       3,625
                                                                   ----------
                                                                   $   92,595
- -----------------------------------------------------------------------------
  Stores - 3.1%
    Ann Taylor Stores Corp.*                                  400  $    7,000
    Gymboree Corp.*                                           300       6,863
    Rite Aid Corp.                                            370      14,708
    Sears, Roebuck & Co.                                      300      13,837
                                                                   ----------
                                                                   $   42,408
- -----------------------------------------------------------------------------
  Supermarkets - 1.3%
    Vons Cos., Inc.*                                          300  $   17,963
- -----------------------------------------------------------------------------
  Telecommunications - 6.2%
    Cabletron Systems, Inc.*                                  380  $   12,635
    Cellular Communications International,
      Inc.*                                                 2,200      63,800
    U.S. Robotics Corp.*                                      100       7,200
                                                                   ----------
                                                                   $   83,635
- -----------------------------------------------------------------------------
  Utilities - Telephone - 1.8%
    MCI Communications Corp.                                  760  $   24,842
- -----------------------------------------------------------------------------
Total U.S. Stocks                                                  $1,038,830
- -----------------------------------------------------------------------------
Foreign Stocks - 15.0%
  Finland - 2.4%
    Huhtamaki Oy (Consumer Goods and Services)                200  $    9,300
    Nokia Corp., ADR (Telecommunications)                     400      23,050
                                                                   ----------
                                                                   $   32,350
- -----------------------------------------------------------------------------
  France - 0.9%
    Union Assurances Federale S.A. (Insurance)                100  $   12,341
- -----------------------------------------------------------------------------
  Hong Kong - 2.0%
    Cafe de Coral Group (Restaurants and
      Lodging)                                             20,000  $    5,364
    Giordano International Ltd. (Apparel and
      Textiles)                                             8,000       6,826
    Liu Chong Hing Bank Ltd. (Banks and Credit
      Companies)                                            2,000       3,336
    Wharf Holdings Ltd. (Real Estate Investment
      Trusts)                                               1,000       4,991
    Wing Hang Bank Ltd. (Bank and Credit
      Companies)                                            1,500       6,808
                                                                   ----------
                                                                   $   27,325
- -----------------------------------------------------------------------------
  Italy - 0.8%
    Fila Holdings S.p.A., ADR (Apparel and
      Textiles)                                               100  $    5,812
    Olivetti Group (Office Equipment)*                     13,600       4,792
                                                                   ----------
                                                                   $   10,604
- -----------------------------------------------------------------------------
  New Zealand - 2.7%
    Lion Nathan Ltd. (Food and Beverage
      Products)                                             3,000  $    7,185
    Sky City Ltd. (Entertainment)*                          1,900      10,350
    Tranz Rail Holdings Ltd., ADR (Railroads)*              1,040      18,395
                                                                   ----------
                                                                   $   35,930
- -----------------------------------------------------------------------------
  Philippines - 0.3%
    Pilpino Telephone & Telegraph Corp.
      (Telecommunications)*                                 4,800  $    4,067
- -----------------------------------------------------------------------------
  South Korea - 1.3%
    Korea Electric Power Corp., ADR (Utilities -
      Electric)                                               500  $   10,250
    Korea Mobile Telecommunications, ADR
      (Telecommunications)                                    618       7,957
                                                                   ----------
                                                                   $   18,207
- -----------------------------------------------------------------------------
  Sweden - 1.4%
    Enator AB (Computer Services)*                            480  $   12,290
    Nobel Biocare (Medical and Health Products)               400       7,043
                                                                   ----------
                                                                   $   19,333
- -----------------------------------------------------------------------------
  United Kingdom - 3.2%
    British Petroleum PLC, ADR (Oils)                         100  $   14,137
    Jarvis Hotels PLC (Restaurants and Lodging)+            2,900       7,999
    Kwik-Fit Holdings PLC (Automotive)                      1,200       4,471
    PowerGen PLC (Utilities - Electric)                     1,400      13,719
    Storehouse PLC (Stores)                                   700       3,100
                                                                   ----------
                                                                   $   43,426
- -----------------------------------------------------------------------------
Total Foreign Stocks                                               $  203,583
- -----------------------------------------------------------------------------
Total Stocks (Identified Cost, $1,168,334)                         $1,242,413
- -----------------------------------------------------------------------------

Bonds - 2.2%
- -----------------------------------------------------------------------------
                                                 Principal Amount
                                                    (000 Omitted)
- -----------------------------------------------------------------------------
Harrah's Jazz Co., 14.25s, 2001** (Identified
  Cost, $31,496)                                           $   60  $   29,721
- -----------------------------------------------------------------------------

Put Option Purchased - 1.7%
- -------------------------------------------------------------------------------
                                                 Principal Amount
                                                     of Contracts
Description/Expiration Month/Strike Price           (000 Omitted)       Value
- -----------------------------------------------------------------------------
S&P Index/September/775                                    $    2  $    9,825
S&P Index/September/800                                         2      12,500
- -----------------------------------------------------------------------------
Total Put Options Purchased (Premiums Paid, $21,499)               $   22,325
- -----------------------------------------------------------------------------

Short-Term Obligations - 3.0%
- -----------------------------------------------------------------------------
                                                 Principal Amount
Issuer                                              (000 Omitted)
- -----------------------------------------------------------------------------
Federal Home Loan Bank, due 1/02/97,
at Amortized Cost                                          $   40  $   39,988
- -----------------------------------------------------------------------------
Total Investments (Identified Cost, $1,261,317)                    $1,334,447

Other Assets, Less Liabilities - 1.2%                                  16,808
- -----------------------------------------------------------------------------
Net Assets - 100.0%                                                $1,351,255
- -----------------------------------------------------------------------------
 *Non-income producing security.
**Non-income producing security - in default.
 +Restricted security.

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS

Statement of Assets and Liabilities
- ----------------------------------------------------------------------------
December 31, 1996
- ----------------------------------------------------------------------------
Assets:
  Investments, at value (identified cost, $1,261,317)            $1,334,447
  Cash                                                                3,534
  Receivable for Series shares sold                                   9,996
  Interest and dividends receivable                                   1,752
  Deferred organization expenses                                      8,499
                                                                 ----------
      Total assets                                               $1,358,228
                                                                 ----------
Liabilities:
  Payable for Series shares reacquired                           $       24
  Payable to affiliate for management fee                                81
  Accrued expenses and other liabilities                              6,868
                                                                 ----------
      Total liabilities                                          $    6,973
                                                                 ----------
Net assets                                                       $1,351,255
                                                                 ==========
Net assets consist of:
  Paid-in capital                                                $1,279,148
  Unrealized appreciation on investments and translation of
    assets and liabilities in foreign currencies                     73,135
  Accumulated net realized loss on investments and foreign
    currency transactions                                            (1,028)
                                                                 ----------
      Total                                                      $1,351,255
                                                                 ==========
Shares of beneficial interest outstanding                          126,723
                                                                   =======
Net asset value per share
  (net assets of $1,351,255 / 126,723 shares of beneficial
  interest outstanding)                                            $10.66
                                                                   ======

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS - continued

Statement of Operations
- --------------------------------------------------------------------------
Period Ended December 31, 1996*
- --------------------------------------------------------------------------
Net investment income:
  Income -
    Dividends                                                      $ 5,551
    Interest                                                         1,832
                                                                   -------
      Total investment income                                      $ 7,383
                                                                   -------
  Expenses -
    Management fee                                                 $ 3,196
    Trustees' compensation                                             508
    Shareholder servicing agent fee                                    145
    Printing                                                         6,506
    Auditing fees                                                    2,006
    Legal fees                                                       1,922
    Amortization of organization expenses                              689
    Custodian fee                                                      469
    Miscellaneous                                                      982
                                                                   -------
      Total expenses                                               $16,423
    Fees paid indirectly                                               (84)
    Reduction of expenses by investment adviser                    (12,079)
                                                                   -------
      Net expenses                                                 $ 4,260
                                                                   -------
        Net investment income                                      $ 3,123
                                                                   -------
Realized and unrealized gain (loss) on investments:
  Realized gain (loss) (identified cost basis) -
    Investment transactions                                        $18,596
    Foreign currency transactions                                      (56)
                                                                   -------
        Net realized gain on investments and foreign currency
          transactions                                             $18,540
                                                                   -------
  Change in unrealized appreciation -
    Investments                                                    $73,130
    Translation of assets and liabilities in foreign
      currencies                                                         5
                                                                   -------
      Net unrealized gain on investments and foreign currency
        translation                                                $73,135
                                                                   -------
        Net realized and unrealized gain on investments and
          foreign currency                                         $91,675
                                                                   -------
          Increase in net assets from operations                   $94,798
                                                                   =======

*For the period from the commencement of investment operations, August 14,
 1996 to December 31, 1996.

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS - continued

Statements of Changes in Net Assets
- ---------------------------------------------------------------------------
Period Ended December 31, 1996*

Increase (decrease) in net assets:
From operations -
  Net investment income                                          $    3,123
  Net realized gain on investments and foreign currency
    transactions                                                     18,540
  Net unrealized gain on investments and foreign currency
    translation                                                      73,135
                                                                 ----------
    Increase in net assets from operations                       $   94,798
                                                                 ----------
Distributions declared to shareholders -
  From net investment income                                     $   (3,068)
  From net realized gain on investments and foreign currency
    transactions                                                    (18,540)
  In excess of net realized gain on investments and foreign
    currency transactions                                            (1,083)
  Tax return of capital                                              (3,853)
                                                                 ----------
      Total distributions declared to shareholders               $  (26,544)
                                                                 ----------
Series share (principal) transactions -
  Net proceeds from sale of shares                               $1,251,706
  Net asset value of shares issued to shareholders in
    reinvestment of distributions                                    26,544
  Cost of shares reacquired                                          (3,849)
                                                                 ----------
    Increase in net assets from Series share transactions        $1,274,401
                                                                 ----------
      Total increase in net assets                               $1,342,655
Net assets:
  At beginning of period                                              8,600
                                                                 ----------
  At end of period                                               $1,351,255
                                                                 ==========

*For the period from the commencement of investment operations, August 14,
 1996 to December 31, 1996.

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS - continued

Financial Highlights
- ---------------------------------------------------------------------------
Period Ended December 31, 1996*
- ---------------------------------------------------------------------------
Per share data (for a share outstanding throughout the period):
Net asset value - beginning of period                             $ 10.00
                                                                  -------
Income from investment operations# -
  Net investment income(S)                                        $  0.07
  Net realized and unrealized gain on investments
    and foreign currency transactions                                0.88
                                                                  -------
      Total from investment operations                            $  0.95
                                                                  -------
Less distributions declared to shareholders -
  From net investment income                                      $ (0.03)
  From net realized gain on investments and foreign currency
    transactions                                                    (0.21)
  In excess of net realized gain on investments and foreign
    currency transactions                                           (0.01)
  Tax return of capital                                             (0.04)
                                                                  -------
      Total distributions declared to shareholders                $ (0.29)
                                                                  -------
Net asset value - end of period                                   $ 10.66
                                                                  =======
Total return                                                        8.78%++
Ratios (to average net assets)/Supplemental data(S):
  Expenses                                                          1.00%+
  Net investment income                                             1.72%+
Portfolio turnover                                                    44%
Average commission rate                                           $0.0204
Net assets at end of period (000 omitted)                          $1,351

  *For the period from the commencement of investment operations, August 14,
   1996 to December 31, 1996.
  +Annualized.
 ++Not annualized.
  #Per share data is based on average shares outstanding.
(S)The Adviser voluntarily agreed to maintain the expenses of the Series at
   not more than 1.00% of average daily net assets. To the extent actual
   expenses were over these limitations, the net investment loss per share
   and the ratios would have been:
   Net investment loss                                            $ (0.04)
   Ratios (to average net assets):
     Expenses                                                       3.83%+
     Net investment loss                                          (1.11)%+

See notes to financial statements
<PAGE>
NOTES TO FINANCIAL STATEMENTS

(1) Business and Organization
MFS Value Series (the Series) is a diversified series of MFS Variable
Insurance Trust (the Trust) which is comprised of the following 12 series: MFS
Bond Series, MFS Emerging Growth Series, MFS Growth with Income Series, MFS
High Income Series, MFS Limited Maturity Series, MFS Money Market Series, MFS
Research Series, MFS Strategic Fixed Income Series, MFS Total Return Series,
MFS Utilities Series, MFS Value Series and MFS World Governments Series. The
Trust is organized as a Massachusetts business trust and is registered under
the Investment Company Act of 1940, as amended, as an open-end management
investment company.

The shareholders of each Series of the Trust are separate accounts of
insurance companies which offer variable annuity and/or life insurance
products. As of December 31, 1996 there were eight shareholders in the Series.

(2) Significant Accounting Policies
General - The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.
Investments in foreign securities are vulnerable to the effects of changes in
the relative values of the local currency and the U.S. dollar and to the
effects of changes in each country's legal, political and economic
environment.

Investment Valuations - Equity securities listed on securities exchanges or
reported through the NASDAQ system are valued at last sale prices. Unlisted
equity securities or listed equity securities for which last sale prices are
not available are valued at last quoted bid prices. Debt securities (other
than short-term obligations which mature in 60 days or less), including listed
issues and forward contracts, are valued on the basis of valuations furnished
by dealers or by a pricing service with consideration to factors such as
institutional-size trading in similar groups of securities, yield, quality,
coupon rate, maturity, type of issue, trading characteristics and other market
data, without exclusive reliance upon exchange or over-the-counter prices.
Short-term obligations, which mature in 60 days or less, are valued at
amortized cost, which approximates market value. Options listed on commodities
exchanges are valued at closing settlement prices. Over-the-counter options
are valued by brokers through the use of a pricing model which takes into
account closing bond valuations, implied volatility and short-term repurchase
rates. Securities for which there are no such quotations or valuations are
valued at fair value as determined in good faith by or at the direction of the
Trustees.

Foreign Currency Translation - Investment valuations, other assets, and
liabilities initially expressed in foreign currencies are converted each
business day into U.S. dollars based upon current exchange rates. Purchases
and sales of foreign investments, income and expenses are converted into U.S.
dollars based upon currency exchange rates prevailing on the respective dates
of such transactions. Gains and losses attributable to foreign currency
exchange rates on sales of securities are recorded for financial statement
purposes as net realized gains and losses on investments. Gains and losses
attributable to foreign exchange rate movements on income and expenses are
recorded for financial statement purposes as foreign currency transaction
gains and losses. That portion of both realized and unrealized gains and
losses on investments that result from fluctuations in foreign currency
exchange rates is not separately disclosed.

Deferred Organization Expenses - Costs incurred by the Series in connection
with its organization have been deferred and are being amortized on a
straight-line basis over a five-year period beginning on the date of
commencement of Series operations.

Forward Foreign Currency Exchange Contracts - The Series may enter into
forward foreign currency exchange contracts for the purchase or sale of a
specific foreign currency at a fixed price on a future date. Risks may arise
upon entering into these contracts from the potential inability of
counterparties to meet the terms of their contracts and from unanticipated
movements in the value of a foreign currency relative to the U.S. dollar. The
Series will enter into forward contracts for hedging purposes as well as for
non-hedging purposes. For hedging purposes, the Series may enter into
contracts to deliver or receive foreign currency it will receive from or
require for its normal investment activities. The Series may also use
contracts in a manner intended to protect foreign currency-denominated
securities from declines in value due to unfavorable exchange rate movements.
For non-hedging purposes, the Series may enter into contracts with the intent
of changing the relative exposure of the Series' portfolio of securities to
different currencies to take advantage of anticipated changes. The forward
foreign currency exchange contracts are adjusted by the daily exchange rate of
the underlying currency and any gains or losses are recorded for financial
statement purposes as unrealized until the contract settlement date.

Investment Transactions and Income - Investment transactions are recorded on
the trade date. Interest income is recorded on the accrual basis. All premium
and original issue discount are amortized or accreted for financial statement
and tax reporting purposes as required by federal income tax regulations.
Dividend income is recorded on the ex-dividend date for dividends received in
cash. Dividend and interest payments received in additional securities are
recorded on the ex-dividend or ex-interest date in an amount equal to the
value of the security on such date.

Fees Paid Indirectly - The Series' custodian bank calculates its fee based on
the Series' average daily net assets. This fee is reduced according to an
expense offset arrangement with State Street Bank, the dividend disbursing
agent, which provides for partial reimbursement of custody fees based on a
formula developed to measure the value of cash deposited by the Series with
the custodian and with the dividend disbursing agent. This amount is shown as
a reduction of expenses on the Statement of Operations.

Tax Matters and Distributions - The Series' policy is to comply with the
provisions of the Internal Revenue Code (the Code) applicable to regulated
investment companies and to distribute to shareholders all of its taxable
income, including any net realized gain on investments. Accordingly, no
provision for federal income or excise tax is provided. The Series files a tax
return annually using tax accounting methods required under provisions of the
Code which may differ from generally accepted accounting principles, the basis
on which these financial statements are prepared. Accordingly, the amount of
net investment income and net realized gain reported on these financial
statements may differ from that reported on the Series' tax return and,
consequently, the character of distributions to shareholders reported in the
financial highlights may differ from that reported to shareholders on Form
1099-DIV. Foreign taxes have been provided for on interest and dividend income
earned on foreign investments in accordance with the applicable country's tax
rates and to the extent unrecoverable are recorded as a reduction of
investment income. The Series expects to pass through to shareholders foreign
income taxes paid. The election increases the taxable distributions of the
Series by the amount of the foreign taxes paid. An individual shareholder who
itemizes deductions, or a corporate shareholder, will be able to claim an
offsetting deduction or a tax credit (but not both) on their federal income
tax returns. Individuals who do not itemize deductions may claim a foreign tax
credit but not a deduction. The foreign source income is considered passive
income for the purpose of computing the foreign tax credit limitations.
Distributions to shareholders are recorded on the ex-dividend date.

The Series distinguishes between distributions on a tax basis and a financial
reporting basis and requires that only distributions in excess of tax basis
earnings and profits are reported in the financial statements as a tax return
of capital. Differences in the recognition or classification of income between
the financial statements and tax earnings and profits which result in
temporary over-distributions for financial statement purposes, are classified
as distributions in excess of net investment income or accumulated net
realized gains. During the period ended Decemer 31, 1996, $55 was reclassified
from accumulated undistributed net investment income to accumulated net
realized loss on investments and foreign currency due to differences between
book and tax accounting for currency transactions. This change had no effect
on the net assets or net asset value per share. At December 31, 1996,
accumulated net realized loss on investments and foreign currency transactions
under book accounting were different from tax accounting due to temporary
differences in accounting for wash sales.

(3) Transactions with Affiliates
Investment Adviser - The Series has an investment advisory agreement with
Massachusetts Financial Services Company (MFS) to provide overall investment
advisory and administrative services, and general office facilities. The
management fee is computed daily and paid monthly at an effective annual rate
of 0.75% of average daily net assets. Under a temporary expense limitation
agreement with MFS, MFS has voluntarily agreed to pay all of the Series'
operating expenses, exclusive of management fees, which exceed 0.25% of the
Series' average daily net assets. The Series in turn will pay MFS an expense
reimbursement fee not greater than 0.25% of the Series' average daily net
assets. To the extent that the expense reimbursement fee exceeds the Series'
actual expenses, the excess will be applied to amounts paid by MFS in prior
years. At December 31, 1996, the aggregate unreimbursed expenses owed to MFS
by the Series amounted to $12,079.

The Series pays no compensation directly to its Trustees who are officers of
the investment adviser, or to officers of the Series, all of whom receive
remuneration for their services to the Series from MFS. Certain officers and
Trustees of the Series are officers or directors of MFS and MFS Service
Center, Inc. (MFSC).

Shareholder Servicing Agent - MFSC, a wholly owned subsidiary of MFS, earns a
fee for its services as shareholder servicing agent. The fee is calculated as
a percentage of the average daily net assets at an effective annual rate of up
to 0.035%.

(4) Portfolio Securities
Purchases and sales of investments, other than U.S. government securities,
purchased option transactions and short-term obligations, aggregated
$1,659,247 and $478,962, respectively.

The cost and unrealized appreciation or depreciation in value of the
investments owned by the Series, as computed on a federal income tax basis,
are as follows:

Aggregate cost                                     $1,261,317
                                                   ==========
Gross unrealized appreciation                      $  112,716
Gross unrealized depreciation                         (39,586)
                                                   ----------
    Net unrealized appreciation                    $   73,130
                                                   ==========

(5) Shares of Beneficial Interest
The Series' Declaration of Trust permits the Trustees to issue an unlimited
number of full and fractional shares of beneficial interest (without par
value). Transactions in Series shares were as follows:

                                                      Period Ended
                                                      December 31, 1996*
                                                      ------------------------
                                                      Shares        Amount
- ------------------------------------------------------------------------------
Shares sold                                           123,715       $1,251,706
Shares issued to shareholders in reinvestment
  of distributions                                      2,506           26,544
Shares reacquired                                        (358)          (3,849)
                                                      -------       ----------
    Net increase                                      125,863       $1,274,401
                                                      =======       ==========
*For the period from the commencement of investment operations, August 14,
 1996 to December 31, 1996.

(6) Line of Credit
The Series entered into an agreement which enables it to participate with
other funds managed by MFS in an unsecured line of credit with a bank which
permits borrowings up to $350 million, collectively. Borrowings may be made to
temporarily finance the repurchase of Series shares. Interest is charged to
each fund, based on its borrowings, at a rate equal to the bank's base rate.
In addition, a commitment fee, based on the average daily unused portion of
the line of credit, is allocated among the participating funds at the end of
each quarter. The commitment fee allocated to the Series for the period ended
December 31, 1996 was $6.

(7) Restricted Security
The Series may invest not more than 15% of its net assets in securities which
are subject to legal or contractual restrictions on resale. At December 31,
1996, the Series owned the following restricted security (consisting of 0.6%
of net assets) which may not be publicly sold without registration under the
Securities Act of 1993. The Series does not have the right to demand that such
security be registered. The value of this security is determined by valuations
supplied by a pricing service or brokers or, if not available, in good faith
by or at the direction of the Trustees.

Description                Date of Acquisition    Shares      Cost      Value
- -----------------------------------------------------------------------------
Jarvis Hotels PLC            8/16/96 - 8/23/96     2,900    $7,487     $7,999
                                                                       ======
<PAGE>
INDEPENDENT AUDITORS' REPORT

To the Trustees of MFS Variable Insurance Trust and Shareholders of MFS Value
Series:

We have audited the accompanying statement of assets and liabilities, including
the portfolio of investments, of MFS Value Series (the Series) (one of the
series constituting MFS Variable Insurance Trust) as of December 31, 1996, the
related statement of operations for the year then ended, the statements of
changes in net assets and financial highlights for the period from August 14,
1996 (commencement of investment operations) to December 31, 1996. These
financial statements and financial highlights are the responsibility of the
Series' management. Our responsibility is to express an opinion on these
financial statements and financial highlights based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements and
financial highlights are free of material misstatement. An audit includes
examining, on a test basis, evidence supporting the amounts and disclosures in
the financial statements. Our procedures included confirmation of the
securities owned at December 31, 1996 by correspondence with the custodian and
brokers. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of MFS Value Series
at December 31, 1996, the results of its operations, the changes in its net
assets, and its financial highlights for the respective stated periods in
conformity with generally accepted accounting principles.

DELOITTE & TOUCHE LLP

Boston, Massachusetts
February 7, 1997


                ---------------------------------------------
This report is prepared for the general information of shareholders. It is
authorized for distribution to prospective investors only when preceded or
accompanied by a current prospectus.
<PAGE>




                                                                  VGS-2/97 230



<PAGE>

                                                               Annual Report
[Logo]                                                         for year Ended
INVESTMENT MANAGEMENT                                          December 31, 1996



MFS(R) RESEARCH SERIES
A Series of MFS(R) Variable Insurance  Trust



[Graphic Omitted]

<PAGE>

MFS(R) RESEARCH SERIES

A Series of MFS(R) Variable Insurance  Trust

TRUSTEES                               INVESTMENT ADVISER                      
A. Keith Brodkin*                      Massachusetts Financial Services Company
Chairman and President                 500 Boylston Street                     
                                       Boston, MA 02116-3741                   
Nelson J. Darling, Jr.                                                         
Trustee, Eastern Enterprises           DISTRIBUTOR                             
(diversified holding company)          MFS Fund Distributors, Inc.             
                                       500 Boylston Street                     
William R. Gutow                       Boston, MA 02116-3741                   
Vice Chairman,                                                                 
Capitol Entertainment Management       SHAREHOLDER SERVICE CENTER              
 Company                               MFS Service Center, Inc.                
(Blockbuster Video Franchise)          P.O. Box 1400                           
                                       Boston, MA 02107-9906                   
DIRECTOR OF RESEARCH                                                           
Kevin R. Parke*                        For additional information,             
                                       contact your financial adviser.         
TREASURER                                                                      
W. Thomas London*                      CUSTODIAN                               
                                       Investors Bank & Trust Company          
ASSISTANT TREASURER                                                            
James O. Yost*                         AUDITORS                                
                                       Deloitte & Touche LLP                   
SECRETARY                                                                      
Stephen E. Cavan*                      WORLD WIDE WEB                          
                                       www.mfs.com                             
ASSISTANT SECRETARY                    
James R. Bordewick, Jr.*





*Affiliated with the Investment Adviser

<PAGE>

Dear Contract Owner:

The pattern of slow but sustainable growth seen in most of the world in 1996
seems likely to continue in 1997. While it looks as if U.S. growth in 1997 will
slow modestly relative to 1996, there is evidence that Europe and, to a lesser
degree, Japan are continuing their recoveries from recession. At the same time,
companies in many emerging markets are reporting robust increases in earnings as
these markets benefit from higher-than-average economic growth and market
reforms, which should continue to provide more opportunities for development and
trade.

     After more than six years of expansion, the U.S. economy appears headed
toward another year of at least moderate growth in 1997, although a few signs
point to the possibility of a modest rise in inflation during the year. On the
positive side, the pattern of moderate growth and inflation set over the past
few years now seems fairly well entrenched in the economy and, short of a major
international or domestic crisis, appears to have enough momentum to remain on
track for some time. Recent gains in such important sectors as housing,
automobiles, industrial production, and exports indicate a fair amount of
underlying strength in the economy. However, some reason for caution can be seen
in the continuing high level of consumer debt and the attendant rise in personal
bankruptcies, as well as in the modestly disappointing levels of holiday sales.
Also, the ongoing tightness in labor markets, and price rises in such important
sectors as energy, could add some inflationary pressures to the economy. Given
these somewhat conflicting indicators, we expect real (inflation-adjusted)
growth to revolve around 2% in 1997, which would represent a modest decline from
1996.

     We continue to urge U.S. equity investors to lower their expectations for
1997 and to point out that the impressive gains of the past two years are not
sustainable. Just as the slowdown in corporate earnings growth and increases in
interest rates in 1996 raised some near-term concerns, further interest rate
increases and an acceleration of inflation could negatively affect the stock
market in 1997. However, to the extent that some slowdown in earnings means that
the economy is not overheating, this may be beneficial for the equity market in
the long run. Also, we believe many of the technology-driven productivity gains
that U.S. companies have made in recent years will continue to enhance corporate
America's competitiveness and profitability. Therefore, while we have some
near-term concerns, we remain reasonably positive about the long-term viability
of the equity market.

     In U.S. bond markets, conflicting signals over the strength of the economy
have created near-term volatility. Even comments by Federal Reserve Chairman
Alan Greenspan late in 1996 created some uncertainty over the Federal Reserve
Board's next move. We expect the Fed to maintain its anti-inflationary stance
should signs of more rapid economic growth and, particularly, higher inflation
resurface. While inflationary forces largely remained in check in 1996, the
continued strength in the labor market and rising energy prices mean that a
pickup in inflation is still possible. At the same time, the U.S. budget deficit
continues to decline and, as a percentage of gross domestic product, is now less
than 2%, which we consider a positive development for the bond markets. Although
interest rates may move higher over the coming months, we believe that, at
current levels, fixed-income markets remain equitably valued.

     Internationally, the environment of moderate growth, benign inflation, and
fairly steady interest rates is also providing support for investment markets
and should help support valuation levels in the coming year. Throughout the
world, the key to stock market performance in 1997 will be corporate earnings
growth. While U.S. earnings growth is slowing but still expected to be fairly
healthy, we anticipate that a number of European countries will see an
acceleration in earnings growth and improved valuations in 1997. Despite this
environment, many European countries trade at discounts to the United States. In
particular, we see opportunities in some of the multinationals and businesses
with the ability to generate steady earnings growth. In Japan, a recovery
appears to be taking place, but at a very modest rate, with valuations still at
high levels. In the emerging markets, the long-term economic growth story
remains intact and, although selectivity is even more important in these
markets, more companies are benefiting from this growth and trading at
below-average global valuations.

<PAGE>

     Comments from the Director of Research are presented below. We appreciate
your support and welcome any questions or comments you may have.

Respectfully,

/s/ A. Keith Brodkin                    /s/ Kevin R. Parke
    A. Keith Brodkin                        Kevin R. Parke
    Chairman and President                  Director of Research

January 16, 1997

A Committee of MFS Research Analysts is responsible for the day-to-day
management of the Series under the general supervision of Mr. Parke.

MFS RESEARCH SERIES

For the year ended December 31, 1996, the Series provided a total return of
22.33% (including the reinvestment of distributions). This compares to a return
of 22.64% for the Standard & Poor's 500 Composite Index (the S&P 500), a
popular, unmanaged index of common stock performance, for the same period.

     The Series remains overweighted compared to the S&P 500 in several sectors
including technology, industrial goods and services, consumer staples, and
business services. Relatively neutral weightings to the S&P 500 include
financial services, health care, retailing, and leisure. The Series continues to
be underweighted in energy and in utilities and communications.

     Within the technology sector, there were several stocks which contributed
to the Series' performance over the past 12 months. Software companies including
Microsoft, Compuware, BMC Software, and Cisco Systems have established solid
competitive standings within their industry which has led to successful stock
performance.

     Several companies within the financial services sector have also performed
well during the past year. Life insurance companies such as Conseco, Allstate,
and ITT Hartford have implemented several cost-savings initiatives which
contributed to recent earnings. Additionally, several banks benefited from the
consolidation in the industry. Both Chase Manhattan and BankBoston proved that a
successful merger or acquisition, coupled with a strong management team, can
contribute to earnings much sooner than anticipated.

     While the Series was underweighted in both energy and in utilities and
communications, three companies provided strong returns over the past year.
Newfield Exploration and PanEnergy Corporation proved to have been excellent
additions. Meanwhile, MCI Communications appreciated following the announcement
of a planned acquisition by British Telecommunications PLC.

DIVIDENDS-RECEIVED DEDUCTION

The MFS Research Series has designated $42,311 as a long-term capital gain.

     For the year ended December 31, 1996, the amount of distributions from
income eligible for the 70% dividends-received deduction for corporations came
to 20.77%.

<PAGE>

PERFORMANCE SUMMARY

The information below illustrates the historical performance of MFS Research
Series shares in comparison to various market indicators. Benchmark comparisons
are unmanaged and do not reflect any fees or expenses. You cannot invest in an
index.

GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT
(For the Period from August 1, 1995 through December 31, 1996)

                          MFS               S&P 500         Consumer Price
                    Research Series    Composite Index        Index - U.S.
                    ---------------    ---------------      --------------
         8/95          10000.0             10000.0              10000.0
        12/95          11062.0             11063.0              10059.0
         3/96          11702.0             11659.0              10198.0
         6/96          12403.0             12177.0              10272.0
         9/96          12880.0             12548.0              10348.0
        12/96          13532.0             13591.0              10420.0

AVERAGE ANNUAL TOTAL RETURNS AS OF DECEMBER 31, 1996
                                                       1 Year             Life+
- -------------------------------------------------------------------------------
MFS Research Series                                   +22.33%          +23.46%
- -------------------------------------------------------------------------------
Standard & Poor's 500++                               +22.64%          +26.72%
- -------------------------------------------------------------------------------
Consumer Price Index*++                               + 3.56%          + 2.91%
- -------------------------------------------------------------------------------
 +For the period from the commencement of investment operations, July 26, 1995
  to December 31, 1996.
 *The Consumer Price Index is a popular measure of change in prices.
++Source: CDA/Wiesenberger.

Returns shown do not reflect the deduction of the mortality and expense risk
charges and administration fees. Please refer to the product's annual report for
performance that reflects the fees and charges imposed by insurance company
separate accounts.

Investment return and principal value will fluctuate, and shares, when redeemed,
may be worth more or less than their original cost. Past performance is no
guarantee of future results.

Series results reflect any applicable expense subsidies and waivers, without
which the performance results would have been less favorable. Subsidies and
waivers may be rescinded at any time. See the prospectus for details.

<PAGE>
PORTFOLIO OF INVESTMENTS - December 31, 1996

Stocks - 94.2%
- -----------------------------------------------------------------------------
Issuer                                                    Shares        Value
- -----------------------------------------------------------------------------
U.S. Stocks - 85.6%
  Aerospace - 6.2%
    General Dynamics Corp.                                 3,700  $   260,850
    Lockheed-Martin Corp.                                  5,400      494,100
    McDonnell Douglas Corp.                               12,000      768,000
    United Technologies Corp.                             10,200      673,200
                                                                  -----------
                                                                  $ 2,196,150
- -----------------------------------------------------------------------------
  Agricultural Products - 1.6%
    Case Corp.                                            10,300  $   561,350
- -----------------------------------------------------------------------------
  Apparel and Textiles - 0.7%
    Nike, Inc., "B"                                        2,500  $   149,375
    Reebok International Ltd.                              2,400      100,800
                                                                  -----------
                                                                  $   250,175
- -----------------------------------------------------------------------------
  Automotive - 0.4%
    Goodrich (B.F.) Co.                                    3,700  $   149,850
- -------------------------------------------------------------------------------
  Banks and Credit Companies - 3.5%
    Bank of Boston Corp.                                   4,140  $   265,995
    Chase Manhattan Corp.                                  5,732      511,581
    Compass Bancshares, Inc.                               1,300       51,675
    Crestar Financial Corp.                                2,300      171,063
    Fleet Financial Group, Inc.                            4,800      239,400
                                                                  -----------
                                                                  $ 1,239,714
- -----------------------------------------------------------------------------
  Building - 0.6%
    Newport News Shipbuilding, Inc.*                      14,900  $   223,500
- -----------------------------------------------------------------------------
  Business Machines - 0.9%
    Affiliated Computer Co.*                               1,100  $    32,725
    Sun Microsystems, Inc.*                               11,000      282,562
                                                                  -----------
                                                                  $   315,287
- -----------------------------------------------------------------------------
  Business Services - 3.4%
    Accustaff, Inc.*                                      21,400  $   452,075
    Alco Standard Corp.                                    6,800      351,050
    DST Systems, Inc.                                      8,300      260,413
    Technology Solutions Co.*                              3,500      145,250
                                                                  -----------
                                                                  $ 1,208,788
- -----------------------------------------------------------------------------
  Chemicals - 4.0%
    Air Products & Chemicals, Inc.                         8,900  $   615,212
    Praxair, Inc.                                         17,200      793,350
                                                                  -----------
                                                                  $ 1,408,562
- -----------------------------------------------------------------------------
  Computer Software - Personal Computers - 3.2%
    Electronic Arts, Inc.*                                 8,700  $   260,456
    First Data Corp.                                       7,400      270,100
    Microsoft Corp.*                                       7,600      627,950
                                                                  -----------
                                                                  $ 1,158,506
- -----------------------------------------------------------------------------
  Computer Software - Systems - 6.2%
    Adobe Systems, Inc.                                    6,000  $   224,250
    BMC Software, Inc.*                                    7,800      322,725
    Cadence Design Systems, Inc.*                          8,175      324,956
    Computer Associates International, Inc.                5,150      256,212
    Compuware Corp.*                                       2,100      105,263
    Oracle Systems Corp.*                                 15,500      647,125
    Sybase, Inc.*                                          5,300       88,444
    Synopsys, Inc.*                                        5,300      245,125
                                                                  -----------
                                                                  $ 2,214,100
- -----------------------------------------------------------------------------
  Consumer Goods and Services - 10.1%
    Colgate-Palmolive Co.                                  6,500  $   599,625
    Estee Lauder Cos., "A"                                 3,700      188,237
    Gillette Co.                                           6,900      536,475
    Philip Morris Cos., Inc.                               7,500      844,688
    Procter & Gamble Co.                                   5,400      580,500
    Revlon, Inc., "A"*                                     5,500      164,312
    Sherwin-Williams Co.                                   6,100      341,600
    Tyco International Ltd.                                6,600      348,975
                                                                  -----------
                                                                  $ 3,604,412
- -----------------------------------------------------------------------------
  Defense Electronics - 0.7%
    Loral Space & Communications Corp.*                   13,600  $   249,900
- -----------------------------------------------------------------------------
  Electronics - 1.2%
    Analog Devices, Inc.*                                  4,700  $   159,212
    LSI Logic Corp.*                                       2,400       64,200
    Lattice Semiconductor Corp.*                           1,300       59,800
    Xilinx, Inc.*                                          4,300      158,294
                                                                  -----------
                                                                  $   441,506
- -----------------------------------------------------------------------------
  Entertainment - 1.8%
    Clear Channel Communications, Inc.*                    1,700  $    61,413
    Jacor Communications, Inc.*                            8,600      235,425
    Showboat, Inc.                                         3,200       55,200
    Viacom, Inc., "B"*                                     8,700      303,412
                                                                  -----------
                                                                  $   655,450
- -----------------------------------------------------------------------------
  Financial Institutions - 2.1%
    Advanta Corp., "B"                                     9,600  $   392,400
    Union Planters Corp.                                   9,218      359,483
                                                                  -----------
                                                                  $   751,883
- -----------------------------------------------------------------------------
  Food and Beverage Products - 2.6%
    Earthgrains Co.                                        3,500  $   182,875
    McCormick & Co., Inc.                                  9,100      214,419
    PepsiCo, Inc.                                          6,300      184,275
    Tyson Foods, Inc., "A"                                10,000      342,500
                                                                  -----------
                                                                  $   924,069
- -----------------------------------------------------------------------------
  Forest and Paper Products - 1.8%
    Kimberly-Clark Corp.                                   6,600  $   628,650
- -----------------------------------------------------------------------------
  Insurance - 6.7%
    Allstate Corp.                                         6,600  $   381,975
    Amerin Corp.*                                          3,500       90,125
    CIGNA Corp.                                            4,000      546,500
    Chubb Corp.                                            4,100      220,375
    Conseco, Inc.                                          2,900      184,875
    Equitable of Iowa Cos.                                 3,700      169,737
    ITT Hartford Group, Inc.                               4,200  $   283,500
    Penncorp Financial Group, Inc.                        13,900      500,400
                                                                  -----------
                                                                  $ 2,377,487
- -----------------------------------------------------------------------------
  Medical and Health Products - 2.9%
    Pfizer, Inc.                                           3,500  $   290,063
    Pharmacia & Upjohn, Inc.                               6,200      245,675
    Rhone-Poulenc Rorer, Inc.                              2,200      171,875
    Uromed Corp.*                                         12,400      120,900
    Ventritex, Inc.*                                       8,000      197,000
    Zoll Medical Corp.*                                    1,000       10,750
                                                                  -----------
                                                                  $ 1,036,263
- -----------------------------------------------------------------------------
  Medical and Health Technology and Services - 4.3%
    Coventry Corp.*                                        3,700  $    34,283
    Pacificare Health Systems, Inc., "A"*                  4,400      357,500
    Pacificare Health Systems, Inc., "B"*                  1,100       93,775
    RISCORP, Inc., "A"*                                    1,900        6,887
    St. Jude Medical, Inc.*                               13,400      571,175
    United Healthcare Corp.                               10,700      481,500
                                                                  -----------
                                                                  $ 1,545,120
- -----------------------------------------------------------------------------
  Oil Services - 0.6%
    Transocean Offshore, Inc.                              3,300  $   206,662
- -----------------------------------------------------------------------------
  Oils - 2.0%
    Barrett Resources Corp.*                               4,500  $   191,813
    Mobil Corp.                                            3,000      366,750
    Newfield Exploration Co.*                              5,800      150,800
                                                                  -----------
                                                                  $   709,363
- -----------------------------------------------------------------------------
  Railroads - 3.2%
    Burlington Northern-Santa Fe                           3,700  $   319,587
    Conrail, Inc.                                          2,254      224,555
    Wisconsin Central Transportation Corp.*               15,400      610,225
                                                                  -----------
                                                                  $ 1,154,367
- -----------------------------------------------------------------------------
  Restaurants and Lodging - 3.4%
    HFS, Inc.*                                             9,800  $   585,550
    Host Marriott Corp.*                                  24,400      390,400
    MGM Grand, Inc.*                                       6,500      226,688
    Promus Hotel Corp.*                                      900       26,662
                                                                  -----------
                                                                  $ 1,229,300
- -----------------------------------------------------------------------------
  Special Products and Services - 0.8%
    Stanley Works                                         11,100  $   299,700
- -----------------------------------------------------------------------------
  Stores - 3.3%
    Ann Taylor Stores*                                     9,600  $   168,000
    CompUSA, Inc.*                                        12,500      257,813
    Gymboree Corp.*                                        8,100      185,287
    Hollywood Entertainment Corp.*                         1,400       25,900
    Home Depot, Inc.                                       4,000      200,500
    Lowe's Cos., Inc.                                      5,000      177,500
    Micro Warehouse, Inc.*                                 1,400       16,450
    Staples, Inc.*                                         8,300      149,919
                                                                  -----------
                                                                  $ 1,181,369
- -----------------------------------------------------------------------------
 Supermarkets - 1.3%
    Safeway, Inc.*                                        10,700  $   457,425
- -----------------------------------------------------------------------------
  Telecommunications - 2.8%
    Ascend Communications, Inc.*                             800  $    49,700
    Cabletron Systems, Inc.*                               5,000      166,250
    Cisco Systems, Inc.*                                   5,300      337,213
    Glenayre Technologies, Inc.*                           9,600      207,000
    Lucent Technologies, Inc.                              5,100      235,875
                                                                  -----------
                                                                  $   996,038
- -----------------------------------------------------------------------------
  Utilities - Gas - 2.2%
    Coastal Corp.                                          8,500  $   415,437
    PanEnergy Corp.                                        8,400      378,000
                                                                  -----------
                                                                  $   793,437
- -----------------------------------------------------------------------------
  Utilities - Telephone - 1.1%
    MCI Communications Corp.                              12,400  $   405,325
- -----------------------------------------------------------------------------
Total U.S. Stocks                                                 $30,573,708
- -----------------------------------------------------------------------------
Foreign Stocks - 8.6%
  Denmark - 0.2%
    ISS International Service System A/S, "B"
      (Business Services)                                  3,100  $    81,599
- -----------------------------------------------------------------------------
  Finland - 0.7%
    Huhtamake Group (Conglomerates)                        4,500  $   209,252
    TT Tieto OY, "B" (Computer Software - Systems)           600       50,703
                                                                  -----------
                                                                  $   259,955
- -----------------------------------------------------------------------------
  France - 0.4%
    Union Assurances Federale S.A. (Insurance)             1,200  $   148,091
- -----------------------------------------------------------------------------
  Germany
    SAP AG (Computer Software - Systems)                     100  $    13,767
- -----------------------------------------------------------------------------
  Greece - 0.3%
    Hellenic Telecommunication Organization
      S.A. (Telecommunications)                            5,000   $   85,510
- -----------------------------------------------------------------------------
  Hong Kong - 1.9%
    Giordano International Ltd. (Apparel and Textiles)   142,000   $  121,169
    Wharf Holdings Ltd. (Real Estate
      Investment Trusts)                                  99,000      494,099
    Wing Hang Bank Ltd. (Banks and Credit Companies)      16,500       74,884
                                                                  -----------
                                                                  $   690,152
- -----------------------------------------------------------------------------
  Italy - 0.5%
    Telecom Italia Mobile S.p.A. (Telecommunications)*   128,100  $   182,658
- -----------------------------------------------------------------------------
  Philippines - 0.2%
    Pilipino Telegraph & Telephone Corp.
      (Telecommunications)                                79,500  $    67,352
- -----------------------------------------------------------------------------
  South Korea - 0.4%
    Korea Mobile Telecommunications, ADR
      (Telecommunications)                                 9,952  $   128,132
- -----------------------------------------------------------------------------
  Sweden - 1.8%
    Astra AB, Free Shares, "B" (Medical and
      Health Products)                                     8,800  $   424,827
    Enator AB (Computer Services)*                         3,560       91,155
    Nobel Biocare (Medical and Health Products)            6,700      117,975
                                                                  -----------
                                                                  $   633,957
- -----------------------------------------------------------------------------
  United Kingdom - 2.2%
    British Petroleum PLC, ADR (Oils)                      2,908  $   411,118
    Jarvis Hotels PLC (Restaurants and Lodging)+          56,800      156,669
    Kwik-Fit Holdings PLC (Automotive)                    43,800      162,454
    Storehouse PLC (Stores)                                8,000       35,429
                                                                  -----------
                                                                  $   765,670
- -----------------------------------------------------------------------------
Total Foreign Stocks                                              $ 3,056,843
- -----------------------------------------------------------------------------
Total Stocks (Identified Cost, $31,691,287)                       $33,630,551
- -----------------------------------------------------------------------------

Short-Term Obligation - 17.1%
- -----------------------------------------------------------------------------
                                                Principal Amount
                                                   (000 Omitted)
- -----------------------------------------------------------------------------
Student Loan Marketing Assn., due 1/02/96,                                    
    at Amortized Cost                                     $6,100  $ 6,097,882
- -----------------------------------------------------------------------------
Total Investments (Identified Cost, $37,789,169)                  $39,728,433

Other Assets, Less Liabilities - (11.3)%                           (4,018,047)
- -----------------------------------------------------------------------------
Net Assets - 100.0%                                               $35,710,386
- -----------------------------------------------------------------------------
*Non-income producing security.
+Restricted security.

See notes to financial statements

<PAGE>

FINANCIAL STATEMENTS

Statement of Assets and Liabilities
- -------------------------------------------------------------------------------
December 31, 1996
- -------------------------------------------------------------------------------
Assets:
  Investments, at value (identified cost, $37,789,169)           $39,728,433
  Cash                                                                12,608
  Receivable for Series shares sold                                  402,978
  Interest and dividends receivable                                   32,530
  Receivable from investment adviser                                  32,111
  Deferred organization expenses                                       6,556
  Other assets                                                           678
                                                                 -----------
      Total assets                                               $40,215,894
                                                                 -----------
Liabilities:
  Payable for Series shares reacquired                           $     3,555
  Payable for investments purchased                                4,463,028
  Payable to affiliate for management fee                              2,146
  Accrued expenses and other liabilities                              36,779
                                                                 -----------
      Total liabilities                                          $ 4,505,508
                                                                 -----------
Net assets                                                       $35,710,386
                                                                 ===========
Net assets consist of:
  Paid-in capital                                                $33,784,941
  Unrealized appreciation on investments and translation of
    assets and liabilities in foreign currencies                   1,939,303
  Accumulated net realized loss on investments and foreign
    currency transactions                                            (14,261)
  Accumulated undistributed net investment income                        403
                                                                 -----------
      Total                                                      $35,710,386
                                                                 ===========
Shares of beneficial interest outstanding                         2,719,712
                                                                  =========
Net asset value per share
  (net assets of $35,710,386 / 2,719,712 shares of beneficial
   interest outstanding)                                           $13.13
                                                                   ======
See notes to financial statements

<PAGE>
FINANCIAL STATEMENTS - continued

Statement of Operations
- -------------------------------------------------------------------------------
Year Ended December 31, 1996
- -------------------------------------------------------------------------------
Net investment income:
  Income -
    Dividends                                                      $   124,226
    Interest                                                            58,384
    Foreign taxes withheld                                              (1,755)
                                                                   -----------
      Total investment income                                      $   180,855
                                                                   -----------
  Expenses -
    Management fee                                                 $    92,348
    Trustees' compensation                                               2,033
    Shareholder servicing agent fee                                      4,217
    Printing                                                            30,815
    Auditing fees                                                       29,156
    Registration fees                                                   11,131
    Custodian fee                                                        7,005
    Amortization of organization expenses                                1,842
    Legal fees                                                           1,138
    Miscellaneous                                                          969
                                                                   -----------
      Total expenses                                               $   180,654
    Fees paid indirectly                                                  (664)
    Reduction of expenses by investment adviser                        (56,859)
                                                                   -----------
      Net expenses                                                 $   123,131
                                                                   -----------
        Net investment income                                      $    57,724
                                                                   -----------
Realized and unrealized gain (loss) on investments:
  Realized gain (loss) (identified cost basis) -
    Investment transactions                                        $   435,932
    Foreign currency transactions                                       (1,335)
                                                                   -----------
      Net realized gain on investments and foreign
        currency transactions                                      $   434,597
                                                                   -----------
  Change in unrealized appreciation -
    Investments                                                    $ 1,826,282
    Translation of assets and liabilities in foreign
      currencies                                                            38
                                                                   -----------
      Net unrealized gain on investments and foreign
        currency translation                                       $ 1,826,320
                                                                   -----------
        Net realized and unrealized gain on investments
          and foreign currency                                     $ 2,260,917
                                                                   -----------
          Increase in net assets from operations                   $ 2,318,641
                                                                   ===========
See notes to financial statements

<PAGE>
FINANCIAL STATEMENTS - continued

Statements of Changes in Net Assets
- --------------------------------------------------------------------------------
                                                 Year Ended         Period Ended
                                          December 31, 1996   December 31, 1995*
- --------------------------------------------------------------------------------
Increase (decrease) in net assets:
From operations -
  Net investment income                          $   57,724          $   6,749
  Net realized gain on investments and
    foreign currency transactions                   434,597             31,088
  Net unrealized gain on investments and
    foreign currency translation                  1,826,320            112,983
                                                -----------        -----------
      Increase in net assets from operations    $ 2,318,641        $   150,820
                                                -----------        -----------
Distributions declared to shareholders -
  From net investment income                    $   (55,987)       $    (6,583)
  From net realized gain on investments and
    foreign currency transactions                  (434,345)           (31,088)
  In excess of net realized gain on
    investments and foreign currency
    transactions                                    (15,595)              (418)
                                                -----------        -----------
      Total distributions declared to
        shareholders                            $  (505,927)       $   (38,089)
                                                -----------        -----------
Series share (principal) transactions -
  Net proceeds from sale of shares              $36,570,809        $ 2,485,755
  Net asset value of shares issued to
    shareholders in reinvestment of
    distributions                                   505,927             38,091
  Cost of shares reacquired                      (5,709,233)          (115,008)
                                                -----------        -----------
      Increase in net assets from Series
        share transactions                      $31,367,503        $ 2,408,838
                                                -----------        -----------
        Total increase in net assets            $33,180,217        $ 2,521,569
Net assets:
  At beginning of period                          2,530,169              8,600
                                                -----------        -----------
  At end of period (including accumulated
    undistributed net investment income of
    $403 and $0, respectively)                  $35,710,386        $ 2,530,169
                                                ===========        ===========
*For the period from the commencement of investment operations, July 26, 1995
 to December 31, 1995.

See notes to financial statements

<PAGE>
FINANCIAL STATEMENTS - continued

Financial Highlights
- -------------------------------------------------------------------------------
                                             Year Ended            Period Ended
                                      December 31, 1996      December 31, 1995*
- -------------------------------------------------------------------------------
Per share data (for a share outstanding throughout each period):
Net asset value - beginning of period            $10.89                 $10.00
                                                 ------                 ------
Income from investment operations# -
  Net investment income(S)                       $ 0.06                 $ 0.05
  Net realized and unrealized gain on
    investments and foreign currency
    transactions                                   2.37                   1.01
                                                 ------                 ------
      Total from investment operations           $ 2.43                 $ 1.06
                                                 ------                 ------
Less distributions declared to shareholders -
  From net investment income                     $(0.02)                 (0.03)
  From net realized gain on investments
    and foreign currency transactions             (0.16)                 (0.14)
  In excess of net realized gain on
    investments and foreign currency
    transactions                                  (0.01)                  --
                                                 ------                 ------
      Total distributions declared to
        shareholders                             $(0.19)                 (0.17)
                                                 ------                 ------
Net asset value - end of period                  $13.13                 $10.89
                                                 ======                 ======
Total return                                     22.33%                 10.62%++
Ratios (to average net assets)/
 Supplemental data(S):
  Expenses                                        1.00%                  1.00%+
  Net investment income                           0.47%                  1.15%+
Portfolio turnover                                  56%                    28%
Average commission rate###                      $0.0295                   --
Net assets at end of period (000 omitted)       $35,710                 $2,530

  *For the period from the commencement of investment operations, July 26, 1995
   to December 31, 1995.
  +Annualized.
 ++Not annualized.
  #Per share data is based on average shares outstanding.
###Average commission rate is calculated for funds with fiscal years beginning
   on or after September 1, 1995.
(S)The adviser voluntarily agreed to maintain the expenses of the Series at not
   more than 1.00% of average daily net assets. To the extent actual expenses
   were over these limitations, the net investment loss per share and the ratios
   would have been:
   Net investment loss                             --                    (0.08)
   Ratios (to average net assets):
     Expenses                                     1.48%                  3.90%+
     Net investment loss                           --                  (1.73)%+

See notes to financial statements

<PAGE>
NOTES TO FINANCIAL STATEMENTS

(1) Business and Organization

MFS Research Series (the Series) is a diversified series of MFS Variable
Insurance Trust (the Trust) which is comprised of the following 12 series: MFS
Bond Series, MFS Emerging Growth Series, MFS Growth with Income Series, MFS High
Income Series, MFS Limited Maturity Series, MFS Money Market Series, MFS
Research Series, MFS Strategic Fixed Income Series, MFS Total Return Series, MFS
Utilities Series, MFS Value Series, and MFS World Governments Series. The Trust
is organized as a Massachusetts business trust and is registered under the
Investment Company Act of 1940, as amended, as an open-end management investment
company.

The shareholders of each Series of the Trust are separate accounts of insurance
companies which offer variable annuity and/or life insurance products. As of
December 31, 1996 there were 20 shareholders in the Series.

(2) Significant Accounting Policies

General - The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates. Investments
in foreign securities are vulnerable to the effects of changes in the relative
values of the local currency and the U.S. dollar and to the effects of changes
in each country's legal, political and economic environment.

Investment Valuations - Equity securities listed on securities exchanges or
reported through the NASDAQ system are valued at last sale prices. Unlisted
equity securities or listed equity securities for which last sale prices are not
available are valued at last quoted bid prices. Debt securities (other than
short-term obligations which mature in 60 days or less), including listed
issues, are valued on the basis of valuations furnished by dealers or by a
pricing service with consideration to factors such as institutional-size trading
in similar groups of securities, yield, quality, coupon rate, maturity, type of
issue, trading characteristics and other market data, without exclusive reliance
upon exchange or over-the-counter prices. Short-term obligations, which mature
in 60 days or less, are valued at amortized cost, which approximates market
value. Securities for which there are no such quotations or valuations are
valued at fair value as determined in good faith by or at the direction of the
Trustees.

Foreign Currency Translation - Investment valuations, other assets, and
liabilities initially expressed in foreign currencies are converted each
business day into U.S. dollars based upon current exchange rates. Purchases and
sales of foreign investments, income and expenses are converted into U.S.
dollars based upon currency exchange rates prevailing on the respective dates of
such transactions. Gains and losses attributable to foreign currency exchange
rates on sales of securities are recorded for financial statement purposes as
net realized gains and losses on investments. Gains and losses attributable to
foreign exchange rate movements on income and expenses are recorded for
financial statement purposes as foreign currency transaction gains and losses.
That portion of both realized and unrealized gains and losses on investments
that result from fluctuations in foreign currency exchange rates is not
separately disclosed.

Deferred Organization Expenses - Costs incurred by the Series in connection with
its organization have been deferred and are being amortized on a straight-line
basis over a five-year period beginning on the date of commencement of Series
operations.

Forward Foreign Currency Exchange Contracts - The Series may enter into forward
foreign currency exchange contracts for the purchase or sale of a specific
foreign currency at a fixed price on a future date. Risks may arise upon
entering into these contracts from the potential inability of counterparties to
meet the terms of their contracts and from unanticipated movements in the value
of a foreign currency relative to the U.S. dollar. The Series will enter into
forward contracts for hedging purposes as well as for non-hedging purposes. For
hedging purposes, the Series may enter into contracts to deliver or receive
foreign currency it will receive from or require for its normal investment
activities. The Series may also use contracts in a manner intended to protect
foreign currency-denominated securities from declines in value due to
unfavorable exchange rate movements. For non-hedging purposes, the Series may
enter into contracts with the intent of changing the relative exposure of the
Series' portfolio of securities to different currencies to take advantage of
anticipated changes. The forward foreign currency exchange contracts are
adjusted by the daily exchange rate of the underlying currency and any gains or
losses are recorded for financial statement purposes as unrealized until the
contract settlement date.

Investment Transactions and Income - Investment transactions are recorded on the
trade date. Interest income is recorded on the accrual basis. All premium and
original issue discount are amortized or accreted for financial statement and
tax reporting purposes as required by federal income tax regulations. Dividend
income is recorded on the ex-dividend date for dividends received in cash.
Dividend and interest payments received in additional securities are recorded on
the ex-dividend or ex-interest date in an amount equal to the value of the
security on such date.

Fees Paid Indirectly - The Series' custodian bank calculates its fee based on
the Series' average daily net assets. This fee is reduced according to an
expense offset arrangement with State Street Bank, the dividend disbursing
agent, which provides for partial reimbursement of custody fees based on a
formula developed to measure the value of cash deposited by the Series with the
custodian and with the dividend disbursing agent. This amount is shown as a
reduction of expenses on the Statement of Operations.

Tax Matters and Distributions - The Series' policy is to comply with the
provisions of the Internal Revenue Code (the Code) applicable to regulated
investment companies and to distribute to shareholders all of its taxable
income, including any net realized gain on investments. Accordingly, no
provision for federal income or excise tax is provided. The Series files a tax
return annually using tax accounting methods required under provisions of the
Code which may differ from generally accepted accounting principles, the basis
on which these financial statements are prepared. Accordingly, the amount of net
investment income and net realized gain reported on these financial statements
may differ from that reported on the Series' tax return and, consequently, the
character of distributions to shareholders reported in the financial highlights
may differ from that reported to shareholders on Form 1099-DIV. Foreign taxes
have been provided for on interest and dividend income earned on foreign
investments in accordance with the applicable country's tax rates and to the
extent unrecoverable are recorded as a reduction of investment income. The
Series expects to pass through to shareholders foreign income taxes paid. The
election increases the taxable distributions of the Series by the amount of the
foreign taxes paid. An individual shareholder who itemizes deductions, or a
corporate shareholder, will be able to claim an offsetting deduction or a tax
credit (but not both) on their federal income tax returns. Individuals who do
not itemize deductions may claim a foreign tax credit but not a deduction. The
foreign source income is considered passive income for the purpose of computing
the foreign tax credit limitations. Distributions to shareholders are recorded
on the ex-dividend date.

The Series distinguishes between distributions on a tax basis and a financial
reporting basis and requires that only distributions in excess of tax basis
earnings and profits are reported in the financial statements as a tax return of
capital. Differences in the recognition or classification of income between the
financial statements and tax earnings and profits which result in temporary
over-distributions for financial statement purposes, are classified as
distributions in excess of net investment income or accumulated net realized
gains. During the year ended December 31, 1996, $1,334 was reclassified from
accumulated undistributed net investment income to accumulated net realized loss
on investments and foreign currency transactions due to differences between book
and tax accounting for currency transactions. This change had no effect on the
net assets or net asset value per share. At December 31, 1996, accumulated net
realized loss on investments and foreign currency transactions under book
accounting was different from tax accounting due to temporary differences in
accounting for wash sales.

(3) Transactions with Affiliates

Investment Adviser - The Series has an investment advisory agreement with
Massachusetts Financial Services Company (MFS) to provide overall investment
advisory and administrative services, and general office facilities. The
management fee is computed daily and paid monthly at an annual rate of 0.75% of
average daily net assets. Under a temporary expense limitation agreement with
MFS, MFS has voluntarily agreed to pay all of the Series' operating expenses,
exclusive of management fees, which exceed 0.25% of the Series' average daily
net assets. The Series in turn will pay MFS an expense reimbursement fee not
greater than 0.25% of the Series' average daily net assets. To the extent that
the expense reimbursement fee exceeds the Series' actual expenses, the excess
will be applied to amounts paid by MFS in prior years. At December 31, 1996, the
aggregate unreimbursed expenses owed to MFS by the Series amounted to $73,772,
including $56,859 incurred in the current year.

The Series pays no compensation directly to its Trustees who are officers of the
investment adviser, or to officers of the Series, all of whom receive
remuneration for their services to the Series from MFS. Certain officers and
Trustees of the Series are officers or directors of MFS and MFS Service Center,
Inc. (MFSC).

Shareholder Servicing Agent - MFSC, a wholly owned subsidiary of MFS, earns a
fee for its services as shareholder servicing agent. The fee is calculated as a
percentage of the average daily net assets at an effective annual rate of up to
0.035%.

(4) Portfolio Securities

Purchases and sales of investments, other than U.S. government securities,
purchased option transactions and short-term obligations, aggregated $35,701,131
and $6,650,754, respectively.

The cost and unrealized appreciation or depreciation in value of the investments
owned by the Series, as computed on a federal income tax basis, are as follows:

Aggregate cost                                                     $37,789,169
                                                                   ===========
Gross unrealized appreciation                                      $ 2,613,234
Gross unrealized depreciation                                         (673,970)
                                                                   -----------
    Net unrealized appreciation                                    $ 1,939,264
                                                                   ===========
(5) Shares of Beneficial Interest

The Series' Declaration of Trust permits the Trustees to issue an unlimited
number of full and fractional shares of beneficial interest (without par value).
Transactions in Series shares were as follows:

<TABLE>
<CAPTION>
                                             Year Ended                        Period Ended
                                             December 31, 1996                 December 31, 1995*
                                             -------------------------------   -----------------------------
                                                    Shares            Amount        Shares           Amount
- ------------------------------------------------------------------------------------------------------------
<S>                                              <C>             <C>               <C>           <C>       
Shares sold                                      2,923,453       $36,570,809       238,822       $2,485,755
Shares issued to shareholders in
  reinvestment of distributions                     38,386           505,927         3,521           38,091
Shares reacquired                                 (474,538)       (5,709,233)      (10,792)        (115,008)
                                                 ---------       -----------       -------       ----------
    Net increase                                 2,487,301       $31,367,503       231,551       $2,408,838
                                                 =========       ===========       =======       ==========

*For the period from the commencement of investment operations, July 26, 1995 to
December 31, 1995.
</TABLE>

(6) Line of Credit

The Series entered into an agreement which enables it to participate with other
funds managed by MFS in an unsecured line of credit with a bank which permits
borrowings up to $350 million, collectively. Borrowings may be made to
temporarily finance the repurchase of Series shares. Interest is charged to each
fund, based on its borrowings, at a rate equal to the bank's base rate. In
addition, a commitment fee, based on the average daily unused portion of the
line of credit, is allocated among the participating funds at the end of each
quarter. The commitment fee allocated to the Series for the year ended December
31, 1996 was $155.

(7) Restricted Security

The Series may invest not more than 15% of its net assets in securities which
are subject to legal or contractual restrictions on resale. At December 31,
1996, the Series owned the following restricted security (constituting 0.4% of
net assets) which may not be publicly sold without registration under the
Securities Act of 1933. The value of this security is determined by valuations
supplied by a pricing service or brokers or, if not available, in good faith by
or at the direction of the Trustees.

Description           Date of Acquisition     Shares         Cost         Value
- -------------------------------------------------------------------------------
Jarvis Hotels PLC      6/21/96 - 11/27/96     56,800     $150,129      $156,669
                                                                       ========

<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Trustees of MFS Variable Insurance Trust and
Shareholders of MFS Research Series:

We have audited the accompanying statement of assets and liabilities, including
the portfolio of investments, of MFS Research Series (the Series) (one of the
series constituting the MFS Variable Insurance Trust) as of December 31, 1996,
the related statement of operations for the year then ended, the statements of
changes in net assets and financial highlights for the year then ended and for
the period from July 26, 1995 (the commencement of investment operations) to
December 31, 1995. These financial statements and financial highlights are the
responsibility of the Series' management. Our responsibility is to express an
opinion on these financial statements and financial highlights based on our
audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of the securities owned at
December 31, 1996 by correspondence with the custodian and brokers; where
replies were not received from brokers, we performed other auditing procedures.
An audit also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of MFS Research Series
at December 31, 1996, the results of its operations, the changes in its net
assets, and its financial highlights for the respective stated periods in
conformity with generally accepted accounting principles.


DELOITTE & TOUCHE LLP

Boston, Massachusetts
February 7, 1997

                ---------------------------------------------
This report is prepared for the general information of shareholders. It is
authorized for distribution to prospective investors only when preceded or
accompanied by a current prospectus.

<PAGE>























































                                                                    VFR-2/97 11M




<PAGE>

                                                               Annual Report
[logo]                                                         for Year Ended
INVESTMENT MANAGEMENT                                          December 31, 1996




MFS(R) GROWTH WITH INCOME SERIES
A Series of MFS(R) Variable Insurance Trust


[Graphic Omitted]



<PAGE>

<TABLE>
MFS(R) GROWTH WITH INCOME SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST

<S>                                                                 <C>
TRUSTEES                                                            INVESTMENT ADVISER
A. Keith Brodkin*                                                   Massachusetts Financial Services Company
Chairman and President                                              500 Boylston Street
                                                                    Boston, MA 02116-3741
Nelson J. Darling, Jr.
Trustee, Eastern Enterprises                                        DISTRIBUTOR
(diversified holding company)                                       MFS Fund Distributors, Inc.
                                                                    500 Boylston Street
William R. Gutow                                                    Boston, MA 02116-3741
Vice Chairman,
Capitol Entertainment Management Company                            SHAREHOLDER SERVICE CENTER
(Blockbuster Video Franchise)                                       MFS Service Center, Inc.
                                                                    P.O. Box 1400
PORTFOLIO MANAGERS                                                  Boston, MA 02107-9906
John D. Laupheimer, Jr.*
Kevin R. Parke*                                                     For additional information,
                                                                    contact your financial adviser.
TREASURER
W. Thomas London*                                                   CUSTODIAN
                                                                    Investors Bank & Trust Company
ASSISTANT TREASURER
James O. Yost*                                                      AUDITORS
                                                                    Deloitte & Touche LLP
SECRETARY
Stephen E. Cavan*                                                   WORLD WIDE WEB
                                                                    www.mfs.com
ASSISTANT SECRETARY
James R. Bordewick, Jr.*

*Affiliated with the Investment Adviser
</TABLE>

<PAGE>

Dear Contract Owner:
The pattern of slow but sustainable growth seen in most of the world in 1996
seems likely to continue in 1997. While it looks like U.S. growth in 1997 will
slow modestly relative to 1996, there is evidence that Europe and, to a lesser
degree, Japan are continuing their recoveries from recession. At the same time,
companies in many emerging markets are reporting robust increases in earnings as
these markets benefit from higher-than-average economic growth and market
reforms. This should continue to provide more opportunities for development and
trade.

    After more than six years of expansion, the U.S. economy appears headed
toward another year of moderate growth in 1997, although a few signs point to
the possibility of a modest increase in inflation during the year. On the
positive side, the pattern of moderate growth and inflation set over the past
few years now seems fairly well entrenched in the economy and, short of a major
international or domestic crisis, appears to have enough momentum to remain on
track for some time. Recent gains in such important sectors as housing,
automobiles, industrial production, and exports indicate a fair amount of
underlying strength in the economy. However, some reason for caution can be seen
in the continuing high level of consumer debt and the attendant rise in personal
bankruptcies, as well as in the modestly disappointing level of holiday sales.
Furthermore, the ongoing tightness in labor markets, and price rises in such
important sectors as energy, could add some inflationary pressures to the
economy. Given these somewhat conflicting indicators, we expect real
(inflation-adjusted) growth to revolve around 2% in 1997, which would represent
a modest decline from 1996.

    We continue to urge U.S. equity investors to lower their expectations for
1997 and to point out that the impressive gains of the past two years are not
sustainable. Just as the slowdown in corporate earnings growth and increases in
interest rates in 1996 raised some near-term concerns, further interest rate
increases and an acceleration of inflation could negatively affect the stock
market in 1997. However, to the extent that some slowdown in earnings means that
the economy is not overheating, this may be beneficial for the equity market in
the long run. We believe many of the technology-driven productivity gains that
U.S. companies have made in recent years will continue to enhance corporate
America's competitiveness and profitability. Therefore, while we have some
near-term concerns, we remain reasonably positive about the long-term viability
of the equity market.

    In U.S. bond markets, conflicting signals over the strength of the economy
have created near-term volatility. Even comments by Federal Reserve Chairman
Alan Greenspan in late 1996 created some uncertainty over the Federal Reserve
Board's next move. However, we expect the Fed to maintain its anti-inflationary
stance should signs of more rapid economic growth and, particularly, higher
inflation resurface. While inflationary forces largely remained in check in
1996, the continued strength in the labor market and rising energy prices mean
that a pickup in inflation is still possible. At the same time, the U.S. budget
deficit continues to decline and, as a percentage of gross domestic product, is
now less than 2%, which we consider a positive development for the bond markets.
Although interest rates may move higher over the coming months, we believe that,
at current levels, fixed-income markets remain equitably valued.

    Internationally, the environment of moderate growth, benign inflation, and
fairly steady interest rates is also providing support for investment markets
and should help support valuation levels in the coming year. Throughout the
world, the key to stock market performance in 1997 will be corporate earnings
growth. While U.S. earnings growth is slowing, but still expected to be fairly
healthy, we anticipate that a number of European countries will see an
acceleration in earnings growth and improved valuations in 1997. Despite this
environment, many European countries trade at discounts to the United States. In
particular, we see opportunities in some of the multinationals and businesses
with the ability to generate steady earnings growth. In Japan, a recovery
appears to be taking place, but at a very modest rate, with valuations still at
high levels. In the emerging markets, the long-term economic growth story
remains intact and, although selectivity is even more important in these
markets, more companies are benefiting from this growth and trading at
below-average global valuations.

<PAGE>

    Comments from the portfolio manager of the Series are presented below. We
appreciate your support and welcome any questions or comments you may have.

Respectfully,

/s/ A. Keith Brodkin        /s/ John D. Laupheimer, Jr.    /s/ Kevin R. Parke
    A. Keith Brodkin            John D. Laupheimer, Jr.        Kevin R. Parke
    Chairman and President      Portfolio Manager              Portfolio Manager

January 13, 1997


MFS GROWTH WITH INCOME SERIES

For the year ended December 31, 1996, the Growth with Income Series provided a
total return of 24.46%. This compares to a 22.64% return for the Standard &
Poor's 500 Composite Index (the S&P 500), a popular, unmanaged index of common
stock performance.

    The past year produced a mostly benign investment environment with growth
slowly progressing, which allowed interest rates to stay low and led to improved
valuations. At the same time, many companies continued to report significant
gains in earnings. The Series also benefited from this favorable investment
environment, by being overweighted in sectors that outperformed the market,
while being underweighted in those that lagged the market. For example, the
Series was overweighted in financial services stocks and industrial goods and
services, particularly aerospace and defense stocks, both of which outperformed
the market, as measured by the S&P 500. Meanwhile, underweighted sectors such as
utilities and leisure underperformed the market as measured by the S&P 500.
Financial services stocks benefited from a number of favorable developments.
First, some companies such as First Bank Systems and Norwest have been selling
at significant discounts to the market -- discounts which we feel are not
warranted given their underlying strength. Second, the ongoing and necessary
consolidation of the banking industry benefits the acquiring companies, which
are able to reach broader markets and realize economies of scales, as well as
the stocks of companies being taken over, as they have been bought at
significant premiums.

    Meanwhile, the defense and aerospace industry is also going through a
massive consolidation as the defense business shrinks. In most cases, the
resulting acquisitions and mergers are enhancing, not diluting, earnings as
these companies also enjoy increased economies of scale and increased purchasing
power and global strength. We think there will be more mergers in the future.

    One industry that did not perform as well as expected was retailing. Going
into the year, we were overweighted in the retail stocks, as they had performed
poorly both in 1994 and 1995, and we felt their valuations were at fairly
attractive levels. As 1996 progressed, however, we reduced our positions in the
retail sector as these companies continued to underperform. Part of the reason
for this underperformance was the continuing high levels of consumer debt and
the overall saturation of retail stores.

    Looking ahead, we have some concerns about the S&P 500's ability to continue
to increase earnings at the same pace as the last couple of years. As the
economy slows, the ability of companies to make their earnings estimates will
become more and more significant. As a result, stock selection will become even
more important. In this environment, we believe that our emphasis on original
research, combined with our bottom-up approach to stock selection, should
continue to benefit the Series over the long term.

<PAGE>

PORTFOLIO MANAGERS' PROFILES

John D. Laupheimer, Jr. joined Massachusetts Financial Services (MFS) in 1981 as
an industry specialist and is Portfolio Manager of MFS Growth with Income
Series. A graduate of Boston University and the Sloan School of Management of
Massachusetts Institute of Technology, he was named Investment Officer in 1983,
Assistant Vice President - Investments in 1984, Vice President - Investments in
1986, and Senior Vice President in 1995.

Kevin R. Parke is Senior Vice President of MFS, Director of Equity Research,
and Portfolio Manager of MFS Growth with Income Series. Mr. Parke joined MFS
in 1985 as an industry specialist. He was named Assistant Vice President -
Investments in 1987, Vice President - Investments in 1988, Senior Vice
President in 1993, and Director of Equity Research in 1995. Mr. Parke is a
graduate of Lehigh University and the Harvard University Graduate School of
Business Administration.

FEDERAL INCOME TAX INFORMATION ON DISTRIBUTIONS

The MFS Growth with Income Series has designated $14,070 as a long-term capital
gain.

DIVIDENDS-RECEIVED DEDUCTION

For the year ended December 31, 1996, the amount of distributions from income
eligible for the 70% dividends-received deduction for corporations came to
47.42%.

<PAGE>

PERFORMANCE SUMMARY

The information below illustrates the historical performance of MFS Growth with
Income Series shares in comparison to various market indicators. Benchmark
comparisons are unmanaged and do not reflect any fees or expenses.
You cannot invest in an index.

GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT
(For the Period from October 1, 1995 to December 31, 1996)


              MFS Growth             Consumer             S&P 500
          with Income Series    Price Index - U.S.     Composite Index
          ------------------    ------------------     ---------------
10/95          $10,000              $10,000                $10,000
12/95           10,664               10,025                 10,601
 3/96           11,418               10,152                 11,171
 6/96           11,850               10,225                 11,668
 9/96           12,403               10,300                 12,024
12/96           13,272               10,372                 13,023


AVERAGE ANNUAL TOTAL RETURNS AS OF DECEMBER 31, 1996
                                                            1 Year         Life+
- --------------------------------------------------------------------------------
MFS Growth with Income Series                              +24.46%      +25.88%
- --------------------------------------------------------------------------------
Standard & Poor's 500 Composite Index++                    +22.64%      +23.95%
- --------------------------------------------------------------------------------
Consumer Price Index*++                                    + 3.56%      + 3.01%
- --------------------------------------------------------------------------------
 +For the period from the commencement of investment operations, October 9, 1995
  to December 31, 1996.
++Source: CDA/Wiesenberger.
 *The Consumer Price Index is a popular measure of change in prices.

Returns shown do not reflect the deduction of the mortality and expense risk
charges and administrative fees. Please refer to the product's annual report for
performance that reflects the fees and charges imposed by insurance company
separate accounts.

Investment return and principal value will fluctuate, and shares, when redeemed,
may be worth more or less than their original cost. Past performance is no
guarantee of future results.

Series results reflect any applicable expense subsidies and waivers, without
which the performance results would have been less favorable. Subsidies and
waivers may be rescinded at any time. See the prospectus for details.

<PAGE>

PORTFOLIO OF INVESTMENTS - December 31, 1996

Stocks - 90.6%
- -----------------------------------------------------------------------------
Issuer                                                    Shares        Value
- -----------------------------------------------------------------------------
U.S. Stocks - 86.9%
  Aerospace - 7.4%
    Allied Signal, Inc.                                    1,450   $   97,150
    General Dynamics Corp.                                 1,000       70,500
    Lockheed-Martin Corp.                                  1,592      145,668
    McDonnell Douglas Corp.                                2,400      153,600
    Raytheon Co.                                           1,900       91,438
    United Technologies Corp.                              1,900      125,400
                                                                   ----------
                                                                   $  683,756
- -----------------------------------------------------------------------------
  Agricultural Products - 0.5%
    Case Corp.                                               800   $   43,600
- -----------------------------------------------------------------------------
  Apparel and Textiles - 1.7%
    Nike, Inc., "B"                                        1,400   $   83,650
    Reebok International Ltd.                                500       21,000
    VF Corp.                                                 700       47,250
                                                                   ----------
                                                                   $  151,900
- -----------------------------------------------------------------------------
  Automotive - 0.9%
    Goodrich (B.F.) Co.                                    2,000   $   81,000
- -----------------------------------------------------------------------------
  Banks and Credit Companies - 8.7%
    Bank of Boston Corp.                                     600   $   38,550
    Chase Manhattan Corp.                                    400       35,700
    Comerica, Inc.                                         1,100       57,613
    Corestates Financial Corp.                               100        5,187
    Crestar Financial Corp.                                  800       59,500
    First Bank System, Inc.                                2,000      136,500
    First Chicago NBD Corp.                                  450       24,187
    Firstar Corp.                                            900       47,250
    National City Corp.                                    1,200       53,850
    Northern Trust Co.                                     1,700       61,625
    Norwest Corp.                                          3,900      169,650
    SunTrust Banks, Inc.                                   1,400       68,950
    U.S. Bancorp                                             900       40,444
                                                                   ----------
                                                                   $  799,006
- -----------------------------------------------------------------------------
  Business Machines - 0.6%
    International Business Machines Corp.                    300   $   45,300
    Xerox Corp.                                              100        5,262
                                                                   ----------
                                                                   $   50,562
- -----------------------------------------------------------------------------
  Business Services - 1.7%
    Alco Standard Corp.                                    1,400   $   72,275
    Ceridian Corp.*                                          100        4,050
    Computer Sciences, Inc.*                                 800       65,700
    DST Systems, Inc.*                                       200        6,275
    Sabre Group Holdings, Inc.*                              400       11,150
                                                                   ----------
                                                                   $  159,450
- -----------------------------------------------------------------------------
  Cellular Telephones - 0.1%
    AirTouch Communications, Inc.*                           200   $    5,050
- -----------------------------------------------------------------------------
  Chemicals - 2.8%
    Air Products & Chemicals, Inc.                         1,200   $   82,950
    Betzdearborn, Inc.                                       100        5,850
    du Pont (E. I.) de Nemours & Co.                         800       75,500
    Monsanto Corp                                          1,100       42,763
    Praxair, Inc.                                          1,000       46,125
                                                                   ----------
                                                                   $  253,188
- -----------------------------------------------------------------------------
  Computer Software - Personal Computers - 1.3%
    First Data Corp.                                       1,300   $   47,450
    Microsoft Corp.*                                         900       74,362
                                                                   ----------
                                                                   $  121,812
- -----------------------------------------------------------------------------
  Computer Software - Systems - 1.6%
    Computer Associates International, Inc.                1,850   $   92,038
    Electronic Data Systems Corp.                            100        4,325
    Oracle Systems Corp.*                                  1,100       45,925
                                                                   ----------
                                                                   $  142,288
- -----------------------------------------------------------------------------
  Consumer Goods and Services - 8.8%
    Colgate-Palmolive Co.                                  1,700   $  156,825
    Gillette Co.                                           2,450      190,487
    Philip Morris Cos., Inc.                               2,200      247,775
    Procter & Gamble Co.                                     700       75,250
    Service Corp. International                              200        5,600
    Sherwin-Williams Co.                                     800       44,800
    Tyco International Ltd.                                  700       37,012
    UST, Inc.                                              1,400       45,325
                                                                   ----------
                                                                   $  803,074
- -----------------------------------------------------------------------------
  Defense Electronics - 0.2%
    Loral Space & Communications Corp.*                    1,300   $   23,888
- -----------------------------------------------------------------------------
  Electrical Equipment - 3.2%
    General Electric Co.                                   1,800   $  177,975
    Honeywell, Inc.                                        1,750      115,062
                                                                   ----------
                                                                   $  293,037
- -----------------------------------------------------------------------------
  Electronics - 0.9%
    Intel Corp.                                              600   $   78,563
- -----------------------------------------------------------------------------
  Entertainment - 0.3%
    Viacom, Inc., "B"*                                       700   $   24,413
- -----------------------------------------------------------------------------
  Financial Institutions - 4.2%
    American Express Co.                                     600   $   33,900
    Beneficial Corp                                        2,150      136,256
    Federal Home Loan Mortgage Corp.                         400       44,050
    MBNA Corp.                                               100        4,150
    Merrill Lynch & Co., Inc.                                300       24,450
    State Street Boston Corp.                              1,900      122,550
    Union Planters Corp.                                     600       23,400
                                                                   ----------
                                                                   $  388,756
- -----------------------------------------------------------------------------
  Food and Beverage Products - 4.8%
    Archer Daniels-Midland Co.                             1,500   $   33,000
    CPC International, Inc.                                  900       69,750
    Coca Cola Co.                                            600       31,575
    General Mills, Inc.                                    1,400       88,725
    McCormick & Co., Inc.                                    200        4,712
    PepsiCo, Inc.                                          3,000       87,750
    Ralston-Purina Group                                     650       47,694
    Tyson Foods, Inc., "A"                                 1,100   $   37,675
    Wrigley (William) Jr. Co.                                700       39,375
                                                                   ----------
                                                                   $  440,256
- -----------------------------------------------------------------------------
  Forest and Paper Products - 1.3%
    Kimberly-Clark Corp.                                   1,300   $  123,825
- -----------------------------------------------------------------------------
  Insurance - 6.8%
    AFLAC, Inc                                             1,300   $   55,575
    Allstate Corp.                                         1,200       69,450
    CIGNA Corp.                                              750      102,469
    Chubb Corp.                                              300       16,125
    ITT Hartford Group, Inc.                               1,000       67,500
    MBIA, Inc.                                               100       10,125
    Progressive Corp. Ohio                                 1,700      114,537
    St. Paul Cos., Inc.                                      900       52,762
    Torchmark Corp.                                        1,050       53,025
    Transamerica Corp.                                       700       55,300
    Travelers Group, Inc.                                    500       22,687
    UNUM Corp.                                               100        7,225
                                                                   ----------
                                                                   $  626,780
- -----------------------------------------------------------------------------
  Machinery - 1.7%
    Deere & Co., Inc.                                        850   $   34,531
    Ingersoll Rand Co.                                     1,400       62,300
    York International Corp.                               1,000       55,875
                                                                   ----------
                                                                   $  152,706
- -----------------------------------------------------------------------------
  Medical and Health Products - 5.8%
    American Home Products Corp.                             600   $   35,175
    Fresenius National Medical Care*                         100           11
    Johnson & Johnson                                      2,500      124,375
    Lilly (Eli) & Co.                                        700       51,100
    Pfizer, Inc.                                             700       58,012
    Pharmacia & Upjohn, Inc.                                 700       27,738
    Rhone-Poulenc Rorer, Inc.                              1,500      117,188
    Warner-Lambert Co.                                     1,600      120,000
                                                                   ----------
                                                                   $  533,599
- -----------------------------------------------------------------------------
  Medical and Health Technology and Services - 2.1%
    Medtronic, Inc.                                          400   $   27,200
    Pacificare Health Systems, Inc., "B"*                    600       51,150
    St. Jude Medical, Inc.*                                2,000       85,250
    United Healthcare Corp.                                  700       31,500
                                                                   ----------
                                                                   $  195,100
- -----------------------------------------------------------------------------
  Metals and Minerals - 0.5%
    Phelps Dodge Corp.                                       700   $   47,250
- -------------------------------------------------------------------------------
  Oil Services - 0.3%
    Schlumberger Ltd.                                        300   $   29,962
- -----------------------------------------------------------------------------
  Oils - 5.2%
    Amoco Corp.                                              300   $   24,150
    Chevron Corp.                                            800       52,000
    Exxon Corp.                                            1,100      107,800
    Mobil Corp.                                            1,250   $  152,813
    Texaco, Inc.                                           1,400      137,375
                                                                   ----------
                                                                   $  474,138
- -----------------------------------------------------------------------------
  Photographic Products - 0.8%
    Eastman Kodak Co.                                        900   $   72,225
- -----------------------------------------------------------------------------
  Printing and Publishing - 1.6%
    Gannett Co., Inc.                                      1,100   $   82,362
    Tribune Co., Inc.                                        800       63,100
                                                                   ----------
                                                                   $  145,462
- -----------------------------------------------------------------------------
  Railroads - 2.0%
    Burlington Northern-Santa Fe                             600   $   51,825
    CSX Corp.                                              1,300       54,925
    Conrail, Inc.                                            459       45,728
    Illinois Central Corp.                                 1,125       36,000
                                                                   ----------
                                                                   $  188,478
- -----------------------------------------------------------------------------
  Restaurants and Lodging - 0.1%
    McDonald's Corp.                                         200   $    9,050
- -------------------------------------------------------------------------------
  Special Products and Services - 0.2%
    Stanley Works                                            700   $   18,900
- -------------------------------------------------------------------------------
  Stores - 2.3%
    CVS Corp.                                                400   $   16,550
    Circuit City Stores, Inc.                                600       18,075
    Home Depot, Inc.                                         800       40,100
    Lowe's Cos., Inc.                                      1,100       39,050
    Penney (J.C.), Inc.                                    1,000       48,750
    Sears, Roebuck & Co.                                     600       27,675
    Staples, Inc.*                                           300        5,419
    Talbots, Inc.                                            500       14,313
                                                                   ----------
                                                                   $  209,932
- -----------------------------------------------------------------------------
  Supermarkets - 0.8%
    Kroger Co.*                                              100   $    4,650
    Safeway, Inc.*                                         1,000       42,750
    Vons Cos., Inc.*                                         500       29,938
                                                                   ----------
                                                                   $   77,338
- -----------------------------------------------------------------------------
  Telecommunications - 0.4%
    Lucent Technologies, Inc.                                800   $   37,000
- -------------------------------------------------------------------------------
  Utilities - Electric - 1.6%
    Allegheny Power System, Inc.                             600   $   18,225
    CMS Energy Corp.                                         100        3,363
    Cinergy Corp.                                            600       20,025
    DPL, Inc.                                                600       14,700
    FPL Group, Inc.                                        1,000       46,000
    GPU, Inc.                                                100        3,363
    Illinova Corp.                                           100        2,750
    Pinnacle West Capital Corp.                              100        3,175
    Portland General Corp.                                   800       33,600
                                                                   ----------
                                                                   $  145,201
- -----------------------------------------------------------------------------
  Utilities - Gas - 0.8%
    Consolidated Natural Gas Co.                             500   $   27,625
    Pacific Enterprises                                      500       15,187
    PanEnergy Corp.                                          700       31,500
                                                                   ----------
                                                                   $   74,312
- -----------------------------------------------------------------------------
  Utilities - Telephone - 2.9%
    Ameritech Corp.                                          100   $    6,062
    BellSouth Corp.                                          100        4,037
    GTE Corp.                                              2,150       97,825
    MCI Communications Corp.                               3,500      114,406
    Pacific Telesis Group                                    600       22,050
    SBC Communications, Inc.                                 500       25,875
                                                                   ----------
                                                                   $  270,255
- -----------------------------------------------------------------------------
Total U.S. Stocks                                                  $7,975,112
- -----------------------------------------------------------------------------
Foreign Stocks - 3.7%
  Germany - 0.2%
    Henkel KGaA (Chemicals)                                  200   $    9,863
    Hoechst AG (Chemicals)                                   200        9,253
                                                                   ----------
                                                                   $   19,116
- -----------------------------------------------------------------------------
  Hong Kong - 0.7%
    Hongkong Land Holdings Ltd. (Real Estate
      Investment Trusts)                                   6,000   $   16,680
    Mandarin Oriental International Ltd.
      (Restaurants and Lodging)                            6,000        8,460
    Swire Pacific Ltd., "A" (Airlines)*                    1,500       14,302
    Wharf Holdings Ltd. (Real Estate
      Investment Trusts)                                   4,000       19,961
                                                                   ----------
                                                                   $   59,403
- -----------------------------------------------------------------------------
  Japan - 0.2%
    Canon, Inc. (Business Machines)                        1,000   $   22,056
- -----------------------------------------------------------------------------
  Netherlands - 0.2%
    Royal Dutch Petroleum Co. (Oils)                         100   $   17,075
- -----------------------------------------------------------------------------
  New Zealand - 0.1%
    Lion Nathan Ltd. (Food and Beverage
      Products)                                            5,400   $   12,934
- -----------------------------------------------------------------------------
  South Korea - 0.2%
    Korea Mobile Telecommunications, ADR
      (Telecommunications)                                 1,133   $   14,587
- -------------------------------------------------------------------------------
  Sweden - 0.9%
    Astra AB, Free Shares, "B" (Medical and
      Health Products)                                     1,250   $   60,230
    Sparbanken Svergie, "A" (Financial
      Services)                                            1,200       20,562
                                                                   ----------
                                                                   $   80,792
- -----------------------------------------------------------------------------
  United Kingdom - 1.2%
    British Petroleum PLC, ADR (Oils)                        300   $   42,413
    PowerGen PLC (Utilities - Electric)                    6,400       62,647
    SmithKline Beecham PLC, ADR (Medical and
      Health Products)                                       100        6,800
                                                                   ----------
                                                                   $  111,860
- -----------------------------------------------------------------------------
Total Foreign Stocks                                               $  337,823
- -----------------------------------------------------------------------------
Total Stocks (Identified Cost, $7,477,367)                         $8,312,935
- -----------------------------------------------------------------------------

Convertible Preferred Stocks -  0.1%
- -----------------------------------------------------------------------------
    Atlantic Richfield Co., 9s (Oils)                        300   $    6,450
    Tosco Financing Trust, 5.75s (Financial
      Institutions)##                                        100        5,137
- -----------------------------------------------------------------------------
Total Convertible Preferred Stocks (Identified Cost, $12,434)      $   11,587
- -----------------------------------------------------------------------------

Convertible Bond - 0.2%
- -----------------------------------------------------------------------------
                                                Principal Amount
Issuer                                             (000 Omitted)        Value
- -----------------------------------------------------------------------------
  Sandoz Capital BVI Ltd., 2s, 2002 (Chemicals)##
    (Identified Cost, $16,038)                              $ 15   $   16,125
- -----------------------------------------------------------------------------
Short-Term Obligation - 8.3%
- -----------------------------------------------------------------------------
      Federal Home Loan Bank, due 1/02/97, at
      Amortized Cost                                        $760   $  759,778
- -----------------------------------------------------------------------------
Total Investments (Identified Cost, $8,265,617)                    $9,100,425

Other Assets, Less Liabilities -  0.8%                                 73,688
- -----------------------------------------------------------------------------
Net Assets - 100.0%                                                $9,174,113
- -----------------------------------------------------------------------------
 *Non-income producing security.
##SEC Rule 144A restriction.

See notes to financial statements
<PAGE>

FINANCIAL STATEMENTS

Statement of Assets and Liabilities
- ------------------------------------------------------------------------------
December 31, 1996
- ------------------------------------------------------------------------------
Assets:
  Investments, at value (identified cost, $8,265,617)            $ 9,100,425
  Cash                                                                 3,065
  Receivable for Series shares sold                                   54,054
  Interest and dividends receivable                                   15,931
  Receivable from investment adviser                                  20,150
  Deferred organization expenses                                       6,923
  Other assets                                                             4
                                                                 -----------
      Total assets                                               $ 9,200,552
                                                                 -----------
Liabilities:
  Payable for Series shares reacquired                                $   30
  Payable to affiliate for management fee                                559
  Accrued expenses and other liabilities                              25,850
                                                                 -----------
      Total liabilities                                          $    26,439
                                                                 -----------
Net assets                                                       $ 9,174,113
                                                                 ===========
Net assets consist of:
  Paid-in capital                                                $ 8,348,221
  Unrealized appreciation on investments
    and translation of assets and liabilities in foreign
    currencies                                                       834,814
  Accumulated net realized loss on investments
    and foreign currency transactions                                (10,421)
  Accumulated undistributed net investment income                      1,499
                                                                 -----------
      Total                                                      $ 9,174,113
                                                                 ===========
Shares of beneficial interest outstanding                          706,552
                                                                   =======
Net asset value per share
  (net assets of $9,174,113 / 706,552 shares of beneficial
  interest outstanding)                                             $12.98
                                                                    ======

See notes to financial statements


<PAGE>

FINANCIAL STATEMENTS - continued

Statement of Operations
- --------------------------------------------------------------------------------
Year Ended December 31, 1996
- --------------------------------------------------------------------------------
Net investment income:
  Income -
    Dividends                                                         $  75,866
    Interest                                                             27,710
    Foreign taxes withheld                                                 (730)
                                                                      ---------
      Total investment income                                         $ 102,846
                                                                      ---------
  Expenses -
    Management fee                                                    $  30,792
    Trustees' compensation                                                2,033
    Shareholder servicing agent fee                                       1,412
    Auditing fees                                                        22,806
    Printing                                                             16,973
    Custodian fee                                                         3,633
    Amortization of organization expenses                                 1,842
    Legal fees                                                            1,214
    Miscellaneous                                                         3,555
                                                                      ---------
      Total expenses                                                  $  84,260
    Fees paid indirectly                                                   (545)
    Reduction of expenses by investment adviser                         (42,658)
                                                                      ---------
      Net expenses                                                    $  41,057
                                                                      ---------
        Net investment income                                         $  61,789
                                                                      ---------
Realized and unrealized gain on investments:
  Realized gain (identified cost basis) -
    Investment transactions                                           $  85,728
    Foreign currency transactions                                           100
                                                                      ---------
      Net realized gain on investments and foreign
        currency transactions                                         $  85,828
                                                                      ---------
  Change in unrealized appreciation -
    Investments                                                       $ 814,056
    Translation of assets and liabilities in foreign
      currencies                                                              6
                                                                      ---------
      Net unrealized gain on investments and foreign
        currency translation                                          $ 814,062
                                                                      ---------
        Net realized and unrealized gain on
          investments and foreign currency                            $ 899,890
                                                                      ---------
          Increase in net assets from operations                      $ 961,679
                                                                      =========

See notes to financial statements

<PAGE>

FINANCIAL STATEMENTS - continued

Statements of Changes in Net Assets
- -------------------------------------------------------------------------------
                                                Year Ended    Period Ended
                                         December 31, 1996    December 31, 1995*
- -------------------------------------------------------------------------------
Increase (decrease) in net assets:
From operations -
  Net investment income                         $   61,789            $  1,747 
  Net realized gain on investments and                                         
    foreign currency transactions                   85,828                  47 
  Net unrealized gain on investments and                                       
    foreign currency translation                   814,062              20,752 
                                                ----------            -------- 
    Increase in net assets from operations      $  961,679            $ 22,546 
                                                ----------            -------- 
Distributions declared to shareholders -                                       
  From net investment income                    $  (60,288)           $ (1,794)
  From net realized gain on investments and                                    
    foreign currency transactions                  (85,828)                (20)
  In excess of net realized gain on                                            
    investments and foreign currency                                           
    transactions                                   (10,368)               --   
  Tax return of capital                               --                   (35)
                                                ----------            -------- 
      Total distributions declared to                                          
        shareholders                            $ (156,484)           $ (1,849)
                                                ----------            -------- 
Series share (principal) transactions -                                        
  Net proceeds from sale of shares              $8,604,219            $338,677 
  Net asset value of shares issued to                                          
    shareholders in reinvestment of                                            
    distributions                                  156,483               1,849 
  Cost of shares reacquired                       (756,607)             (5,000)
                                                ----------            -------- 
    Increase in net assets from Series                                         
      share transactions                        $8,004,095            $335,526 
                                                ----------            -------- 
      Total increase in net assets              $8,809,290            $356,223 
Net assets:                                                                    
  At beginning of period                           364,823               8,600 
                                                ----------            -------- 
                                                                               
  At end of period (including accumulated                                      
    undistributed net investment income of                                     
    $1,499 and $0, respectively)                $9,174,113            $364,823 
                                                ==========            ======== 

*For the period from the commencement of investment operations, October 9, 1995
 to December 31, 1995.

See notes to financial statements


<PAGE>

FINANCIAL STATEMENTS - continued

Financial Highlights
- --------------------------------------------------------------------------------
                                            Year Ended              Period Ended
                                     December 31, 1996        December 31, 1995*
- --------------------------------------------------------------------------------
Per share data (for a share outstanding 
  throughout each period):
Net asset value - beginning of period           $10.61                  $10.00  
                                                ------                  ------  
                                                                                
Income from investment operations# -                                            
  Net investment income(S)                      $ 0.18                  $ 0.05  
  Net realized and unrealized gain on                                           
    investments                                                                 
    and foreign currency transactions             2.42                    0.61  
                                                ------                  ------  
    Total from investment operations            $ 2.60                  $ 0.66  
                                                ------                  ------  
                                                                                
Less distributions declared to                                                  
  shareholders -                                                                
  From net investment income                    $(0.09)                 $(0.05) 
  From net realized gain on investments                                         
    and foreign currency transactions            (0.13)                  --     
  In excess of net realized gain on                                             
    investments and foreign currency                                            
    transactions                                 (0.01)                  --     
                                                ------                  ------  
    Total distributions declared to                                             
      shareholders                              $(0.23)                 $(0.05) 
                                                ------                  ------  
Net asset value - end of period                 $12.98                  $10.61  
                                                ======                  ======  
Total return                                    24.46%                   6.64%++
Ratios (to average net assets)
  /Supplemental data(S):
  Expenses                                       1.00%                   1.00%+ 
  Net investment income                          1.52%                   2.20%+ 
Portfolio turnover                                 41%                      2%  
Average commission rate###                     $0.0351                   --     
Net assets at end of period (000 omitted)       $9,174                    $365  
                                                                        
  * For the period from the commencement of investment operations, October 9,
    1995 to December 31, 1995.
  + Annualized.
 ++ Not annualized.
  # Per share data is based on average shares outstanding.
### Average commision rate is calculated for funds with fiscal years beginning
    on or after September 1, 1995.
(S) The Adviser voluntarily agreed to maintain the expenses of the Series at not
    more than 1.00% of average daily net assets. To the extent actual expenses
    were over these limitations, the net investment income (loss) per share and
    the ratios would have been:

      Net investment income (loss)              $ 0.05                  $(0.41)
      Ratios (to average net assets):
        Expenses                                 2.07%                  21.44%+
        Net investment income (loss)             0.46%                (18.24)%+

See notes to financial statements

<PAGE>

NOTES TO FINANCIAL STATEMENTS

(1) Business and Organization
MFS Growth with Income Series (the Series) is a diversified series of MFS
Variable Insurance Trust (the Trust) which is comprised of the following 12
series: MFS Bond Series, MFS Emerging Growth Series, MFS Growth with Income
Series, MFS High Income Series, MFS Limited Maturity Series, MFS Money Market
Series, MFS Research Series, MFS Strategic Fixed Income Series, MFS Total Return
Series, MFS Utilities Series, MFS Value Series and MFS World Governments Series.
The Trust is organized as a Massachusetts business trust and is registered under
the Investment Company Act of 1940, as amended, as an open-end management
investment company.

The shareholders of each Series of the Trust are separate accounts of insurance
companies which offer variable annuity and/or life insurance products. As of
December 31, 1996 there were 17 shareholders in the Series.

(2) Significant Accounting
Policies General - The preparation of financial statements in conformity with
generally accepted accounting principles requires management to make estimates
and assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates. Investments
in foreign securities are vulnerable to the effects of changes in the relative
values of the local currency and the U.S. dollar and to the effects of changes
in each country's legal, political and economic environment.

Investment Valuations - Equity securities listed on securities exchanges or
reported through the NASDAQ system are valued at last sale prices. Unlisted
equity securities or listed equity securities for which last sale prices are not
available are valued at last quoted bid prices. Debt securities (other than
short-term obligations which mature in 60 days or less), including listed issues
and forward contracts, are valued on the basis of valuations furnished by
dealers or by a pricing service with consideration to factors such as
institutional-size trading in similar groups of securities, yield, quality,
coupon rate, maturity, type of issue, trading characteristics and other market
data, without exclusive reliance upon exchange or over-the-counter prices.
Short-term obligations, which mature in 60 days or less, are valued at amortized
cost, which approximates market value. Securities for which there are no such
quotations or valuations are valued at fair value as determined in good faith by
or at the direction of the Trustees.

Foreign Currency Translation - Investment valuations, other assets, and
liabilities initially expressed in foreign currencies are converted each
business day into U.S. dollars based upon current exchange rates. Purchases and
sales of foreign investments, income and expenses are converted into U.S.
dollars based upon currency exchange rates prevailing on the respective dates of
such transactions. Gains and losses attributable to foreign currency exchange
rates on sales of securities are recorded for financial statement purposes as
net realized gains and losses on investments. Gains and losses attributable to
foreign exchange rate movements on income and expenses are recorded for
financial statement purposes as foreign currency transaction gains and losses.
That portion of both realized and unrealized gains and losses on investments
that result from fluctuations in foreign currency exchange rates is not
separately disclosed.

Deferred Organization Expenses - Costs incurred by the Series in connection with
its organization have been deferred and are being amortized on a straight-line
basis over a five-year period beginning on the date of commencement of Series
operations.

Forward Foreign Currency Exchange Contracts - The Series may enter into forward
foreign currency exchange contracts for the purchase or sale of a specific
foreign currency at a fixed price on a future date. Risks may arise upon
entering into these contracts from the potential inability of counterparties to
meet the terms of their contracts and from unanticipated movements in the value
of a foreign currency relative to the U.S. dollar. The Series will enter into
forward contracts for hedging purposes as well as for non-hedging purposes. For
hedging purposes, the Series may enter into contracts to deliver or receive
foreign currency it will receive from or require for its normal investment
activities. The Series may also use contracts in a manner intended to protect
foreign currency-denominated securities from declines in value due to
unfavorable exchange rate movements. For non-hedging purposes, the Series may
enter into contracts with the intent of changing the relative exposure of the
Series' portfolio of securities to different currencies to take advantage of
anticipated changes. The forward foreign currency exchange contracts are
adjusted by the daily exchange rate of the underlying currency and any gains or
losses are recorded for financial statement purposes as unrealized until the
contract settlement date.

Investment Transactions and Income - Investment transactions are recorded on the
trade date. Interest income is recorded on the accrual basis. All premium and
original issue discount are amortized or accreted for financial statement and
tax reporting purposes as required by federal income tax regulations. Dividend
income is recorded on the ex-dividend date for dividends received in cash.
Dividend and interest payments received in additional securities are recorded on
the ex-dividend or ex-interest date in an amount equal to the value of the
security on such date.

Fees Paid Indirectly - The Series' custodian bank calculates its fee based on
the Series' average daily net assets. This fee is reduced according to an
expense offset arrangement with State Street Bank, the dividend disbursing
agent, which provides for partial reimbursement of custody fees based on a
formula developed to measure the value of cash deposited by the Series with the
custodian and with the dividend disbursing agent. This amount is shown as a
reduction of expenses on the Statement of Operations.

Tax Matters and Distributions - The Series' policy is to comply with the
provisions of the Internal Revenue Code (the Code) applicable to regulated
investment companies and to distribute to shareholders all of its taxable
income, including any net realized gain on investments. Accordingly, no
provision for federal income or excise tax is provided. The Series files a tax
return annually using tax accounting methods required under provisions of the
Code which may differ from generally accepted accounting principles, the basis
on which these financial statements are prepared. Accordingly, the amount of net
investment income and net realized gain reported on these financial statements
may differ from that reported on the Series' tax return and, consequently, the
character of distributions to shareholders reported in the financial highlights
may differ from that reported to shareholders on Form 1099-DIV. Foreign taxes
have been provided for on interest and dividend income earned on foreign
investments in accordance with the applicable country's tax rates and to the
extent unrecoverable are recorded as a reduction of investment income.
Distributions to shareholders are recorded on the ex-dividend date. The Series
expects to pass through to shareholders foreign income taxes paid. The election
increases the taxable distributions of the Series by the amount of the foreign
taxes paid. An individual shareholder who itemizes deductions, or a corporate
shareholder, will be able to claim an offsetting deduction or a tax credit (but
not both) on their federal income tax returns. Individuals who do not itemize
deductions may claim a foreign tax credit but not a deduction. The foreign
source income is considered passive income for the purpose of computing the
foreign tax credit limitations.

The Series distinguishes between distributions on a tax basis and a financial
reporting basis and requires that only distributions in excess of tax basis
earnings and profits are reported in the financial statements as a tax return of
capital. Differences in the recognition or classification of income between the
financial statements and tax earnings and profits which result in temporary
over-distributions for financial statement purposes, are classified as
distributions in excess of net investment income or accumulated net realized
gains. During the year ended December 31, 1996, $2 and $53 was reclassified from
accumulated undistributed net investment income and accumulated net realized
loss on investments and foreign currency transactions, respectively, to paid-in
capital due to differences between book and tax accounting for currency
transactions. This change had no effect on the net assets or net asset value per
share. At December 31, 1996, accumulated undistributed net investment income and
accumulated net realized loss on investments and foreign currency transactions
under book accounting were different from tax accounting due to temporary
differences in accounting for wash sales and tax spillbacks.

(3) Transactions with Affiliates
Investment Adviser - The Series has an investment advisory agreement with
Massachusetts Financial Services Company (MFS) to provide overall investment
advisory and administrative services, and general office facilities. The
management fee is computed daily and paid monthly at an annual rate of 0.75% of
average daily net assets. Under a temporary expense limitation agreement with
MFS, MFS has voluntarily agreed to pay all of the Series' operating expenses,
exclusive of management fees, which exceed 0.25% of the Series' average daily
net assets. The Series in turn will pay MFS an expense reimbursement fee not
greater than 0.25% of the Series' average daily net assets. To the extent that
the expense reimbursement fee exceeds the Series' actual expenses, the excess
will be applied to amounts paid by MFS in prior years. At December 31, 1996, the
aggregate unreimbursed expenses owed to MFS by the Series amounted to $58,884,
including $42,658 incurred in the current year.

The Series pays no compensation directly to its Trustees who are officers of the
investment adviser, or to officers of the Series, all of whom receive
remuneration for their services to the Series from MFS. Certain officers and
Trustees of the Series are officers or directors of MFS and MFS Service Center,
Inc. (MFSC).

Shareholder Servicing Agent - MFSC, a wholly owned subsidiary of MFS, earns a
fee for its services as shareholder servicing agent. The fee is calculated as a
percentage of the average daily net assets at an effective annual rate of up to
0.035%.

(4) Portfolio Securities
Purchases and sales of investments, other than U.S. government securities,
purchased option transactions and short-term obligations, aggregated $8,634,771
and $1,538,106, respectively.

The cost and unrealized appreciation or depreciation in value of the investments
owned by the Series, as computed on a federal income tax basis, are as follows:

    Aggregate cost                                             $8,265,617
                                                               ==========
    Gross unrealized appreciation                              $  894,924
    Gross unrealized depreciation                                 (60,116)
                                                               ----------
        Net unrealized appreciation                            $  834,808
                                                               ==========
(5) Shares of Beneficial Interest
The Series' Declaration of Trust permits the Trustees to issue an unlimited
number of full and fractional shares of beneficial interest (without par value).
Transactions in Series shares were as follows:

                                 Year Ended                   Period Ended      
                                 December 31, 1996            December 31, 1995*
                                 ---------------------------  ------------------
                                  Shares      Amount  Shares        Amount      
- --------------------------------------------------------------------------------
Shares sold                      720,635  $8,604,219  33,867  $338,677          
Shares issued to shareholders                                                   
 in reinvestment of
 distributions                    11,899     156,483     175     1,849          
Shares reacquired                (60,384)   (756,607)   (500)   (5,000)         
                                 -------  ----------  ------  --------          
  Net increase                   672,150  $8,004,095  33,542  $335,526          
                                 =======  ==========  ======  ========          

*For the period from the commencement of investment operations, October 9, 1995,
to December 31, 1995.

(6) Line of Credit
The Series entered into an agreement which enables it to participate with other
funds managed by MFS in an unsecured line of credit with a bank which permits
borrowings up to $350 million, collectively. Borrowings may be made to
temporarily finance the repurchase of Series shares. Interest is charged to each
fund, based on its borrowings, at a rate equal to the bank's base rate. In
addition, a commitment fee, based on the average daily unused portion of the
line of credit, is allocated among the participating funds at the end of each
quarter. The commitment fee allocated to the Series for the year ended December
31, 1996 was $51.

<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Trustees of MFS Variable Insurance Trust and Shareholders of MFS Growth
with Income Series:

We have audited the accompanying statement of assets and liabilities, including
the portfolio of investments, of MFS Growth with Income Series (the Series) (one
of the series constituting the MFS Variable Insurance Trust) as of December 31,
1996, the related statement of operations for the year then ended, the
statements of changes in net assets and financial highlights for the year then
ended and for the period from October 9, 1995 (the commencement of investment
operations) to December 31, 1995. These financial statements and financial
highlights are the responsibility of the Series' management. Our responsibility
is to express an opinion on these financial statements and financial highlights
based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of the securities owned at
December 31, 1996 by correspondence with the custodian and brokers. An audit
also includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation. We believe that our audits provide a reasonable basis for our
opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of MFS Growth with
Income Series at December 31, 1996, the results of its operations, the changes
in its net assets, and its financial highlights for the respective stated
periods in conformity with generally accepted accounting principles.

DELOITTE & TOUCHE LLP

Boston, Massachusetts
February 7, 1997

                ---------------------------------------------
This report is prepared for the general information of shareholders. It is
authorized for distribution to prospective investors only when preceded or
accompanied by a current prospectus.

<PAGE>

























































                                                                     VGI-2/97 4M





<PAGE>
[logo] M F S(SM)                                                  ANNUAL REPORT
INVESTMENT MANAGEMENT                                            FOR YEAR ENDED
                                                              DECEMBER 31, 1996
MFS(R) TOTAL RETURN SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST


[Graphic Omitted]
<PAGE>
MFS(R) TOTAL RETURN SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST

<TABLE>
<C>                                                                 <C>
TRUSTEES                                                            INVESTMENT ADVISER
A. Keith Brodkin*                                                   Massachusetts Financial Services Company
Chairman and President                                              500 Boylston Street
                                                                    Boston, MA 02116-3741
Nelson J. Darling, Jr.
Trustee, Eastern Enterprises                                        DISTRIBUTOR
(diversified holding company)                                       MFS Fund Distributors, Inc.
                                                                    500 Boylston Street
William R. Gutow                                                    Boston, MA 02116-3741
Vice Chairman,
Capitol Entertainment Management Company                            SHAREHOLDER SERVICE CENTER
(Blockbuster Video Franchise)                                       MFS Service Center, Inc.
                                                                    P.O. Box 1400
PORTFOLIO MANAGEMENT                                                Boston, MA 02107-9906
David Calabro*
(Head of Portfolio Management Team)                                 For additional information,
                                                                    contact your financial adviser.
TREASURER
W. Thomas London*                                                   CUSTODIAN
                                                                    Investors Bank & Trust Company
ASSISTANT TREASURER
James O. Yost*                                                      AUDITORS
                                                                    Deloitte & Touche LLP
SECRETARY
Stephen E. Cavan*                                                   WORLD WIDE WEB
                                                                    www.mfs.com
ASSISTANT SECRETARY
James R. Bordewick, Jr.*

*Affiliated with the Investment Adviser
</TABLE>
<PAGE>
Dear Contract Owners:

The pattern of slow but sustainable growth seen in most of the world in 1996
seems likely to continue in 1997. While it looks like U.S. growth in 1997 will
slow modestly relative to 1996, there is evidence that Europe and, to a lesser
degree, Japan are continuing their recoveries from recession. At the same
time, companies in many emerging markets are reporting robust increases in
earnings as these markets benefit from higher-than-average economic growth and
market reforms. This should continue to provide more opportunities for
development and trade.

    After more than six years of expansion, the U.S. economy appears headed
toward another year of moderate growth in 1997, although a few signs point to
the possibility of a modest increase in inflation during the year. On the
positive side, the pattern of moderate growth and inflation set over the past
few years now seems fairly well entrenched in the economy and, short of a
major international or domestic crisis, appears to have enough momentum to
remain on track for some time. Recent gains in such important sectors as
housing, automobiles, industrial production, and exports indicate a fair
amount of underlying strength in the economy. However, some reason for caution
can be seen in the continuing high level of consumer debt and the attendant
rise in personal bankruptcies, as well as in the modestly disappointing level
of holiday sales. Furthermore, the ongoing tightness in labor markets, and
price rises in such important sectors as energy, could add some inflationary
pressures to the economy. Given these somewhat conflicting indicators, we
expect real (inflation-adjusted) growth to revolve around 2% in 1997, which
would represent a modest decline from 1996.

    We continue to urge U.S. equity investors to lower their expectations for
1997 and to point out that the impressive gains of the past two years are not
sustainable. Just as the slowdown in corporate earnings growth and increases
in interest rates in 1996 raised some near-term concerns, further interest
rate increases and an acceleration of inflation could negatively affect the
stock market in 1997. However, to the extent that some slowdown in earnings
means that the economy is not overheating, this may be beneficial for the
equity market in the long run. We believe many of the technology-driven
productivity gains that U.S. companies have made in recent years will continue
to enhance corporate America's competitiveness and profitability. Therefore,
while we have some near-term concerns, we remain reasonably positive about the
long-term viability of the equity market.

    In U.S. bond markets, conflicting signals over the strength of the economy
have created near-term volatility. Even comments by Federal Reserve Chairman
Alan Greenspan in late 1996 created some uncertainty over the Federal Reserve
Board's next move. We expect the Fed to maintain its anti-inflationary stance
should signs of more rapid economic growth and, particularly, higher inflation
resurface. While inflationary forces largely remained in check in 1996, the
continued strength in the labor market and rising energy prices mean that a
pickup in inflation is still possible. At the same time, the U.S. budget
deficit continues to decline and, as a percentage of gross domestic product,
is now less than 2%, which we consider a positive development for the bond
markets. Although interest rates may move higher over the coming months, we
believe that, at current levels, fixed-income markets remain equitably valued.

    Internationally, the environment of moderate growth, benign inflation, and
fairly steady interest rates is also providing support for investment markets
and should help support valuation levels in the coming year. Throughout the
world, the key to stock market performance in 1997 will be corporate earnings
growth. While U.S. earnings growth is slowing, but still expected to be fairly
healthy, we anticipate that a number of European countries will see an
acceleration in earnings growth and improved valuations in 1997. Despite this
environment, many European countries trade at discounts to the United States.
In particular, we see opportunities in some of the multinationals, and
businesses with the ability to generate steady earnings growth. In Japan, a
recovery appears to be taking place, but at a very modest rate, with
valuations still at high levels. In the emerging markets, the long-term
economic growth story remains intact and, although selectivity is even more
important in these markets, more companies are benefiting from this growth and
trading at below-average global valuations.

    Comments from the portfolio manager of the Series are presented below. We
appreciate your support and welcome any questions or comments you may have.

Respectfully,

/s/A. Keith Brodkin                       /s/David Calabro
   A. Keith Brodkin                          David Calabro
   Chairman and President                    Head of Portfolio Management Team

January 13, 1997

MFS(R) TOTAL RETURN SERIES
For the year ended December 31, 1996, the Series provided a total return of
14.37%. This compares to a 13.01% return for the Balanced Fund Index, as
reported by Lipper Analytical Services, Inc., for the same period. (Lipper is
an independent firm that tracks mutual fund performance.) As a balanced fund,
a large portion of the Series' total assets is invested in both stocks and
bonds. Additionally, the Series purchases preferred stocks and convertible
bonds, which in many cases can provide similar returns to common stocks with
less risk. Over the past year, the Series held about 55% of its assets in
common stocks, preferred stocks, and convertible bonds. This allocation
provided the bulk of the return for the Series as a whole in 1996, as the U.S.
stock market continued its upward 1995 trend, posting spectacular gains as
measured by the Standard and Poor's 500 Composite Index ("S&P 500") which
gained 22.64% over the 12-month period. (The S&P 500 is an unmanaged index of
500 widely held common stocks.) The remainder of the Series was invested in a
blend of corporate bonds and U.S. Treasury bonds, with an overall duration of
five to six years. The fixed-income sector also provided positive returns;
however their magnitude was far less than that of the Series' stock portion.
For example, the securities in the Lehman Brothers Government Corporate Bond
Index were fairly representative of the Series' bond allocation, and this
index gained 2.88% over the period. (The Lehman Brothers Government Corporate
Bond Index is an unmanaged, market-value weighted index of U.S. Treasury and
government agency securities, excluding mortgage-backed securities.)

    The Series' stock investment strategy has focused on companies that, in
our view, have earnings prospects or asset values equal to or higher than the
overall market as measured by the S&P 500. Two sectors that we believe fit our
investment criteria are the energy and financial services sectors. Bank stocks
have done particularly well because earnings have risen steadily and an
increase in merger activity has made most banks more valuable. We also favor
the health care sector, where strong earnings and industry consolidation have
improved the outlook for the stocks of many of these companies. Additionally,
we currently favor the aerospace industry, which we believe will benefit from
a cyclical increase in the number of aircraft being built over the next three
years. During the year, we avoided the technology sector because, in our view,
many of these stocks have high growth prospects but also have high valuations,
which means they often carry greater risk. The Series is also underweighted in
consumer companies because of their inability to raise prices as the U.S.
consumer continues to demand more value at lower prices.

    Considering present equity valuations, we feel comfortable with our
current asset allocation. However, should the stock market experience a
meaningful correction, we would be looking to increase our stock allocation.

PORTFOLIO MANAGER PROFILES
David M. Calabro, Vice President, heads the MFS Total Return Series team and
manages that portfolio's common stocks. Mr. Calabro has been employed by MFS
since 1992. Geoffrey L. Kurinsky, Senior Vice President, manages the Series'
fixed-income securities and has been employed by MFS since 1987. Judith N.
Lamb, Vice President, has been employed by MFS since 1992 and manages the
Series' convertible securities. Lisa B. Nurme, Vice President, has been
employed by MFS since 1987 and also manages the portfolio's common stocks as
does Maura A. Shaughnessy, Vice President. Ms. Shaughnessy has been employed
by MFS since 1991.

PERFORMANCE SUMMARY
The information below illustrates the historical performance of MFS Total
Return Series shares in comparison to various market indicators. Benchmark
comparisons are unmanaged and do not reflect any fees or expenses. You cannot
invest in an index.

GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT
(For the Period from January 1, 1995 to December 31, 1996)

               MFS            Consumer       Lehman Brothers
               Total          Price          Government/
               Return         Index -        Corporate
Date           Series         U.S.           Bond Index
- ----           -------        --------       ---------------
 1/95          10000.0        10000.0        10000.0
 6/95          11330.0        10187.0        11380.0
12/95          12734.0        10247.0        12225.0
 6/96          13399.0        10464.0        11963.0
12/96          14564.0        10615.0        12270.0


<TABLE>
<CAPTION>
AVERAGE ANNUAL TOTAL RETURNS AS OF DECEMBER 31, 1996
                                                                 1 Year                 Life+
- ----------------------------------------------------------------------------------------------------
<S>                                                             <C>                  <C>   
MFS Total Return Series                                         +14.37%              +20.74%
- ----------------------------------------------------------------------------------------------------
Average Balanced Fund**                                         +13.76%              +17.21%
- ----------------------------------------------------------------------------------------------------
Lehman Brothers Government/Corporate Bond Index++               + 2.88%              +10.79%
- ----------------------------------------------------------------------------------------------------
Lipper Balanced Fund Index**                                    +13.01%              +18.80%
- ----------------------------------------------------------------------------------------------------
Standard & Poor's 500 Composite Index++                         +22.64%              +30.04%
- ----------------------------------------------------------------------------------------------------
Consumer Price Index*++                                         + 3.59%              + 3.04%
- ----------------------------------------------------------------------------------------------------
 +For the period from the commencement of investment operations, January 3, 1995 to December 31, 1996.
 *The Consumer Price Index is a popular measure of change in prices.
**Source: Lipper Analytical Services.
++Source: CDA/Wiesenberger.
</TABLE>

Returns shown do not reflect the deduction of the mortality and expense risk
charges and administration fees. Please refer to the product's annual report
for performance that reflects the fees and charges imposed by insurance
company separate accounts.

Investment return and principal value will fluctuate, and shares, when
redeemed, may be worth more or less than their original cost. Past performance
is no guarantee of future results.

Series results reflect any applicable expense subsidies and waivers, without
which the performance results would have been less favorable. Subsidies and
waivers may be rescinded at any time. See the prospectus for details.
<PAGE>
PORTFOLIO OF INVESTMENTS - December 31, 1996

Non-Convertible Bonds - 34.0%
- -----------------------------------------------------------------------------
                                                Principal Amount
Issuer                                             (000 Omitted)        Value
- -----------------------------------------------------------------------------
U.S. Bonds - 32.7%
  Airlines - 0.7%
    Continental Airlines, Inc., 9.5s, 2001##             $    50  $    51,000
    Continental Airlines, Inc., 9.5s, 2013                    25       28,123
    Delta Airlines, Inc., 8.5s, 2002                          50       52,941
                                                                  -----------
                                                                  $   132,064
- -----------------------------------------------------------------------------
  Automotive - 0.1%
    Mark IV Industries, Inc., 7.75s, 2006                $    20  $    19,650
- -----------------------------------------------------------------------------
  Banks and Credit Companies - 0.7%
    ABN Amro Bank N.V., 7.3s, 2026                       $    20  $    19,350
    Advanta Corp., 7.47s, 2001                                 5        5,100
    BankAmerica Capital, 8s, 2026                             20       20,239
    Capital One Bank Co., 6.75s, 2000                         25       24,968
    Capital One Financial Corp., 7.25s, 2003                  50       49,188
    MBNA Capital, 8.278s, 2026                                20       20,075
                                                                  -----------
                                                                  $   138,920
- -----------------------------------------------------------------------------
  Building - 0.3%
    USG Corp., 9.25s, 2001                               $    50  $    53,250
- -----------------------------------------------------------------------------
  Business Machines - 0.1%
    International Business Machines Corp.,
      7.125s, 2066                                       $    20  $    19,325
- -----------------------------------------------------------------------------
  Consumer Goods and Services - 0.1%
    Philip Morris Cos., Inc., 7.65s, 2008                $    25  $    25,532
- -----------------------------------------------------------------------------
  Entertainment - 0.3%
    Time Warner, Inc., 8.375s, 2023                      $    50  $    50,693
- -----------------------------------------------------------------------------
  Financial Institutions - 0.6%
    Contifinancial Corp., 8.375s, 2003                   $    20  $    20,600
    Crown, Cork & Seal Finance, 7s, 2006                      20       19,830
    Hubco, Inc., 8.2s, 2006##                                 30       31,200
    Lehman Brothers Holdings, 7.5s, 2026                      10       10,139
    Salton Sea Funding Corp., 7.84s, 2010                     25       25,137
                                                                  -----------
                                                                  $   106,906
- -----------------------------------------------------------------------------
  Food and Beverage Products - 0.1%
    RJR Nabisco, Inc., 8.75s, 2004                       $    25  $    25,231
- -----------------------------------------------------------------------------
  Forest and Paper Products - 0.4%
    Boise Cascade Corp., 9.85s, 2002                     $    25  $    28,272
    Boise Cascade Corp., 7.43s, 2005                          50       50,750
                                                                  -----------
                                                                  $    79,022
- -----------------------------------------------------------------------------
  Insurance - 0.3%
    Nationwide Mutual Insurance Co., 7.5s,
      2024##                                             $    25  $    23,300
    Travelers Capital, 7.75s, 2036                            25       24,250
                                                                  -----------
                                                                  $    47,550
- -----------------------------------------------------------------------------
  Medical and Health Technology and Services - 0.2%
    National Data Corp., 5s, 2003                        $    10  $    10,450
    Tenet Healthcare Corp., 8.625s, 2003                      20       21,100
                                                                  -----------
                                                                  $    31,550
- -----------------------------------------------------------------------------
  Oils - 0.9%
    Enserch Exploration, Inc., 7.54s, 2009##             $    20  $    19,700
    Mitchell Energy & Development Corp.,
      6.75s, 2004                                             40       37,356
    Oryx Energy Co., 8.375s, 2004                             50       51,938
    Tosco Corp., 7.625s, 2006                            $    60       61,945
                                                                  -----------
                                                                  $   170,939
- -----------------------------------------------------------------------------
  Real Estate Investment Trusts - 0.4%
    Loewen Group International, Inc., 7.5s,
      2001                                               $    55  $    55,000
    Taubman Realty Group, 8s, 2001                            25       25,803
                                                                  -----------
                                                                  $    80,803
- -----------------------------------------------------------------------------
  Special Products and Services - 0.1%
    Stewart Enterprises, 6.7s, 2003                      $    20  $    19,688
- -----------------------------------------------------------------------------
  Stores - 0.1%
    Price/Costco, Inc., 7.125s, 2005                     $    20  $    20,002
- -----------------------------------------------------------------------------
  Telecommunications - 1.0%
    360 Communications Co., 7.5s, 2006                   $    33  $    32,733
    Tele-Communications, Inc., 7.385s, 2001                  140      141,386
    Tele-Communications, Inc., 10.125s, 2022                  20       21,960
                                                                  -----------
                                                                  $   196,079
- -----------------------------------------------------------------------------
  U.S. Treasury Obligations - 24.3%
    U.S. Treasury Notes, 5.875s, 1998                    $   176  $   176,083
    U.S. Treasury Notes, 6s, 1998                            400      401,000
    U.S. Treasury Notes, 9.125s, 1999                         40       42,744
    U.S. Treasury Notes, 8.5s, 2000                          260      277,672
    U.S. Treasury Notes, 6.5s, 2001                          425      429,649
    U.S. Treasury Notes, 6.625s, 2001                      1,100    1,117,699
    U.S. Treasury Notes, 7.5s, 2001                          300      315,798
    U.S. Treasury Notes, 7.875s, 2004                        200      218,250
    U.S. Treasury Notes, 6.5s, 2006                          165      165,903
    U.S. Treasury Notes, 6.875s, 2006                        300      309,328
    U.S. Treasury Notes, 7s, 2006                             45       46,751
    U.S. Treasury Bonds, 6.75s, 2026                       1,093    1,101,198
    U.S. Treasury Bonds, 12s, 2005                            60       81,469
                                                                  -----------
                                                                  $ 4,683,544
- -----------------------------------------------------------------------------
  Utilities - Electric - 1.6%
    Cleveland Electric Illuminating, 9.25s,
      1999                                               $    50  $    52,198
    Coastal Corp., 7.75s, 2035                                70       71,265
    First PV Funding Corp., 10.3s, 2014                       50       53,250
    Long Island Lighting Co., 8.9s, 2019                      50       51,012
    Long Island Lighting Co., 9.625s, 2024                    25       26,588
    Niagra Mohawk Power, 8s, 2004                             40       38,427
    Texas-New Mexico Power Co., 12.5s, 1999                   20       21,727
                                                                  -----------
                                                                  $   314,467
- -----------------------------------------------------------------------------
  Utilities - Gas - 0.4%
    California Energy Co., 10.25s, 2004                  $    15  $    15,806
    Louis Dreyfus Natural Gas, 9.25s, 2004                    20       21,025
    NGC Corp., 7.625s, 2026                                   20       20,375
    Ras Laffan Gas, 8.294s, 2014##                            20       20,267
                                                                  -----------
                                                                  $    77,473
- -----------------------------------------------------------------------------
Total U.S. Bonds                                                  $ 6,292,688
- -----------------------------------------------------------------------------

Foreign Bonds - 1.3%
  Australia - 0.1%
    Qantas Airways, Ltd., 7.5s, 2003
      (Airlines)##                                       $    25  $    25,568
- -----------------------------------------------------------------------------
  Canada - 0.5%
    Canadian Pacific Forest, 9.25s, 2002
      (Forest and Paper Products)                        $    25  $    25,399
    Gulf Canada Resources Ltd., 8.35s, 2006
      (Utilities - Gas)                                       25       25,844
    Husky Oil Ltd., 7.125s, 2006 (Oils)                       50       50,250
                                                                  -----------
                                                                  $   101,493
- -----------------------------------------------------------------------------
  Chile - 0.3%
    Empresa Electric Pehuenche, 7.3s, 2003
      (Utilties - Electric)                              $    50  $    50,546
- -----------------------------------------------------------------------------
  South Africa - 0.1%
    Republic of South Africa, 8.375s, 2006
      (Government)                                       $    20  $    20,000
- -----------------------------------------------------------------------------
  Thailand - 0.3%
    Northrop-Grumman Corp., 9.375s, 2024
      (Aerospace)                                        $    20  $    22,110
    Total Access Communications, 8.375s, 2006
      (Telecommunications)##                                  40       40,244
                                                                  -----------
                                                                  $    62,354
- -----------------------------------------------------------------------------
Total Foreign Bonds                                               $   259,961
- -----------------------------------------------------------------------------
Total Non-Convertible Bonds (Identified Cost, $6,520,507)         $ 6,552,649
- -----------------------------------------------------------------------------

Convertible Bonds - 0.6%
- -----------------------------------------------------------------------------
  ADT Operations, Inc., 0s, 2010 (Electronics)           $    28  $    18,165
  Time Warner, Inc., 7.45s, 1998
    (Entertainment)                                           70       70,771
  Valhi, Inc., 0s, 2007 (Chemicals)                           63       28,980
- -----------------------------------------------------------------------------
Total Convertible Bonds (Identified Cost, $107,839)               $   117,916
- -----------------------------------------------------------------------------

Stocks - 54.2%
- -----------------------------------------------------------------------------
                                                          Shares
- -----------------------------------------------------------------------------
U.S. Stocks - 48.9%
  Aerospace - 3.8%
    Allied Signal, Inc.                                    2,680  $   179,560
    General Dynamics Corp.                                 1,400       98,700
    Lockheed-Martin Corp.                                    700       64,050
    Raytheon Co.                                           2,250      108,281
    United Technologies Corp.                              4,180      275,880
                                                                  -----------
                                                                  $   726,471
- -----------------------------------------------------------------------------
  Apparel and Textiles - 0.6%
    VF Corp.                                               1,730  $   116,775
- -----------------------------------------------------------------------------
  Automotive - 1.0%
    Dana Corp.                                             2,510  $    81,889
    Ford Motor Co.                                         3,000       95,625
    General Motors Corp.                                     350       19,513
                                                                  -----------
                                                                  $   197,027
- -----------------------------------------------------------------------------
  Banks and Credit Companies - 6.1%
    Bank of Boston Corp.                                   1,850  $   118,862
    Bank of New York, Inc.                                 3,060      103,275
    Chase Manhattan Corp.                                  1,962      175,109
    Comerica, Inc.                                           300       15,713
    Crestar Financial Corp.                                  500       37,187
    Fleet Financial Group, Inc.                            2,950      147,131
    National City Corp.                                    2,700      121,162
    NationsBank Corp.                                      1,740      170,085
    Northern Trust Co.                                       900       32,625
    Norwest Corp.                                          2,500      108,750
    Southern National Corp.                                4,150      150,438
                                                                  -----------
                                                                  $ 1,180,337
- -----------------------------------------------------------------------------
  Business Machines - 1.0%
    Digital Equipment Corp.*                               2,400  $    87,300
    International Business Machines Corp.                    660       99,660
                                                                  -----------
                                                                  $   186,960
- -----------------------------------------------------------------------------
  Cellular Telephones - 0.2%
    Telephone & Data Systems, Inc.                           900  $    32,625
- -----------------------------------------------------------------------------
  Chemicals - 2.9%
    Air Products & Chemicals, Inc.                           900  $    62,212
    Dexter Corp.                                           1,400       44,625
    Dow Chemical Co.                                         580       45,457
    du Pont (E.I.) de Nemours & Co.                        1,420      134,013
    Nalco Chemical Co.                                     1,900       68,638
    Praxair, Inc.                                          1,400       64,575
    Rohm & Haas Co.                                        1,300      106,113
    Witco Corp.                                            1,180       35,990
                                                                  -----------
                                                                  $   561,623
- -----------------------------------------------------------------------------
  Conglomerates - 1.2%
    Eastern Enterprises                                    1,700  $    60,137
    Goodrich (B.F.) Co.                                    4,050      164,025
                                                                  -----------
                                                                  $   224,162
- -----------------------------------------------------------------------------
  Consumer Goods and Services - 2.7%
    American Brands, Inc.                                  1,030  $    51,114
    Colgate-Palmolive Co.                                  1,100      101,475
    Olin Corp.                                               980       36,872
    Philip Morris Cos., Inc.                               2,210      248,901
    Rubbermaid, Inc.                                         710       16,152
    Sherwin-Williams Co.                                   1,200       67,200
                                                                  -----------
                                                                  $   521,714
- -----------------------------------------------------------------------------
  Electrical Equipment - 1.6%
    Cooper Industries, Inc.                                1,100  $    46,337
    General Electric Co.                                   2,000      197,750
    Honeywell, Inc.                                        1,010       66,407
                                                                  -----------
                                                                  $   310,494
- -----------------------------------------------------------------------------
  Electronics - 0.1%
    Analog Devices, Inc.                                     300  $    10,162
- -----------------------------------------------------------------------------
  Financial Institutions - 1.1%
    American Express Co.                                   1,890  $   106,785
    Associates First Capital Corp.*                          200        8,825
    Federal Home Loan Mortgage Corp.                         960      105,720
                                                                  -----------
                                                                  $   221,330
- -----------------------------------------------------------------------------
  Food and Beverage Products - 1.1%
    Anheuser-Busch Cos., Inc.                                200  $     8,000
    Dimon, Inc.                                              800       18,500
    General Mills, Inc.                                    1,350       85,556
    McCormick & Co., Inc.                                  1,900       44,769
    PepsiCo, Inc.                                          1,900       55,575
                                                                  -----------
                                                                  $   212,400
- -----------------------------------------------------------------------------
  Forest and Paper Products - 0.3%
    Weyerhauser Co.                                        1,300  $    61,587
- -----------------------------------------------------------------------------
  Insurance - 3.5%
    Allstate Corp.                                         2,200  $   127,325
    CIGNA Corp.                                            1,200      163,950
    Chubb Corp.                                            1,600       86,000
    St. Paul Cos., Inc.                                    1,990      116,664
    Torchmark Corp.                                        2,200      111,100
    Travelers Group, Inc.                                  1,667       75,623
                                                                  -----------
                                                                  $   680,662
- -----------------------------------------------------------------------------
  Machinery - 0.8%
    Deere & Co., Inc.                                      3,000  $   121,875
    York International Corp.                                 580       32,407
                                                                  -----------
                                                                  $   154,282
- -----------------------------------------------------------------------------
  Medical and Health Products - 2.0%
    American Home Products Corp.                           1,940  $   113,732
    Baxter International, Inc.                             1,180       48,380
    Pharmacia & Upjohn, Inc.                               2,900      114,913
    Rhone-Poulenc Rorer, Inc.                              1,300      101,562
                                                                  -----------
                                                                  $   378,587
- -----------------------------------------------------------------------------
  Medical and Health Technology and Services - 1.0%
    Columbia/HCA Healthcare Corp.                          1,800  $    73,350
    St. Jude Medical, Inc.*                                  530       22,591
    United Healthcare Corp.                                2,300      103,500
                                                                  -----------
                                                                  $   199,441
- -----------------------------------------------------------------------------
  Metals and Minerals - 0.5%
    Aluminum Company of America                            1,350  $    86,062
    Phelps Dodge Corp.                                       300       20,250
                                                                  -----------
                                                                  $   106,312
- -----------------------------------------------------------------------------
  Oil Services - 0.7%
    Schlumberger Ltd.                                      1,270  $   126,841
- -----------------------------------------------------------------------------
  Oils - 5.2%
    Amoco Corp.                                            1,390  $   111,895
    Atlantic Richfield Co.                                   810      107,325
    Exxon Corp.                                            1,500      147,000
    Mobil Corp.                                            1,130      138,142
    Occidental Petroleum Corp.                             3,900       91,163
    Sun Co., Inc.                                            270        6,581
    Texaco, Inc.                                           1,400      137,375
    USX-Marathon Group                                     6,900      164,737
    Ultramar Corp.                                           500       15,813
    Union Pacific Resources Group, Inc.                    2,600       76,050
                                                                  -----------
                                                                  $   996,081
- -----------------------------------------------------------------------------
  Photographic Products - 0.8%
    Eastman Kodak Co.                                      2,030  $   162,908
- -----------------------------------------------------------------------------
  Pollution Control - 0.5%
    Browning-Ferris Industries, Inc.                       1,500  $    39,375
    WMX Technologies, Inc.                                 1,600       52,200
                                                                  -----------
                                                                  $    91,575
- -----------------------------------------------------------------------------
  Railroads - 1.2%
    Burlington Northern-Santa Fe                           1,170  $   101,059
    CSX Corp.                                              1,010       42,672
    Illinois Central Corp.                                 2,950       94,400
                                                                  -----------
                                                                  $   238,131
- -----------------------------------------------------------------------------
  Real Estate Investment Trusts - 0.8%
    Arden Realty Group, Inc.                                 500  $    13,875
    Hospitality Properties Trust                           2,500       72,500
    Meditrust Corp.                                        1,500       60,000
                                                                  -----------
                                                                  $   146,375
- -----------------------------------------------------------------------------
  Special Products and Services - 0.4%
    Stanley Works                                          2,600  $    70,200
- -----------------------------------------------------------------------------
  Stores - 0.9%
    May Department Stores Co.                                950  $    44,413
    Rite Aid Corp.                                           400       15,900
    Sears, Roebuck & Co.                                   1,800       83,025
    Wal-Mart Stores, Inc.                                  1,450       33,169
                                                                  -----------
                                                                  $   176,507
- -----------------------------------------------------------------------------
  Utilities - Electric - 2.5%
    Allegheny Power System, Inc.                             900  $    27,337
    CMS Energy Corp.                                       2,000       67,250
    Carolina Power & Light Co.                             2,400       87,600
    DPL, Inc.                                                600       14,700
    FPL Group, Inc.                                        2,300      105,800
    PECO Energy Co.                                          800       20,200
    Pinnacle West Capital Corp.                            1,800       57,150
    Portland General Corp.                                 1,400       58,800
    Texas Utilities Co.                                      950       38,713
                                                                  -----------
                                                                  $   477,550
- -----------------------------------------------------------------------------
  Utilities - Gas - 2.1%
    Coastal Corp.                                          1,730  $    84,554
    Pacific Enterprises                                      500       15,188
    PanEnergy Corp.                                        3,100      139,500
    Sonat, Inc.                                            1,150       59,225
    UGI Corp.                                              2,400       53,700
    Williams Cos., Inc.                                    1,500       56,250
                                                                  -----------
                                                                  $   408,417
- -----------------------------------------------------------------------------
  Utilities - Telephone - 2.3%
    AT&T Corp.                                               300  $    13,050
    Ameritech Corp.                                          820       49,713
    BellSouth Corp.                                        2,500      100,938
    GTE Corp.                                              3,050      138,775
    MCI Communications Corp.                               4,300      140,556
                                                                  -----------
                                                                  $   443,032
- -----------------------------------------------------------------------------
Total U.S. Stocks                                                 $ 9,420,568
- -----------------------------------------------------------------------------

Foreign Stocks - 5.3%
  Canada - 0.1%
    Canadian National Railway Co. (Railroads)*               500  $    19,000
- -----------------------------------------------------------------------------
  Germany - 0.3%
    Henkel KGaA (Chemicals)                                1,100  $    55,268
- -----------------------------------------------------------------------------
  Netherlands - 0.9%
    Royal Dutch Petroleum Co. (Oils)                       1,020  $   174,165
- -----------------------------------------------------------------------------
  New Zealand
    Lion Nathan Ltd. (Food and Beverage
      Products)                                            2,100  $     5,030
- -----------------------------------------------------------------------------
  Spain - 0.4%
    Repsol S.A., ADR (Oil Services)                        2,000  $    76,250
- -----------------------------------------------------------------------------
  Sweden - 0.5%
    Astra AB, ADR (Medical and Health
      Products)                                            1,500  $    73,500
    Volvo AB, "B", ADR (Automotive)                          590       12,833
                                                                  -----------
                                                                  $    86,333
- -----------------------------------------------------------------------------
  Switzerland - 0.9%
    Novartis AG (Medical and Health Products)*               148  $   169,570
- -----------------------------------------------------------------------------
  United Kingdom - 2.2%
    British Petroleum PLC, ADR (Oils)                      1,807  $   255,465
    SmithKline Beecham PLC, ADR (Medical and
      Health Products)                                     2,580      175,440
                                                                  -----------
                                                                  $   430,905
- -----------------------------------------------------------------------------
Total Foreign Stocks                                              $ 1,016,521
- -----------------------------------------------------------------------------
Total Stocks (Identified Cost, $9,439,235)                        $10,437,089
- -----------------------------------------------------------------------------

Convertible Preferred Stocks - 2.3%
- -----------------------------------------------------------------------------
  American Radio Systems, 7s (Entertainment)##               300  $    13,650
  Case Corp., $4.50 (Agricultural Products)                  700       92,925
  Enron Corp. (Utilities - Gas)                            1,300       31,200
  Finova Finance Trust, 5.5s (FinancialInstitutions)         600       31,500
  Host Marriott Financial, 6.75s (Restaurants
    and Lodging)##                                         2,000      106,000
  Loral Space & Communications, 6s (Aerospace)##             900       50,850
  SCI Finance LLC, "A", $3.125 (Medical and
    Health Technology and Services)                          200       18,825
  Salomon, Inc., 6.25s (Utilities - Telephone)               100        6,025
  Timet Capital Trust, 6.625s (Metals and Minerals)##        700       38,325
  Unocal Corp., 7s (Utilities - Gas)                         946       53,708
- -----------------------------------------------------------------------------
Total Convertible Preferred Stocks (Identified Cost, $409,123)    $   443,008
- -----------------------------------------------------------------------------

Short-Term Obligation - 11.6%
- -----------------------------------------------------------------------------
                                                Principal Amount
                                                   (000 Omitted)
- -----------------------------------------------------------------------------
  Student Loan Marketing Assn., due 1/02/97,
    at Amortized Cost                                    $ 2,230  $ 2,229,226
- -----------------------------------------------------------------------------
Total Investments (Identified Cost, $18,705,930)                  $19,779,888
Other Assets, Less Liabilities - (2.7)%                              (530,116)
- -----------------------------------------------------------------------------
Net Assets -100.0%                                                $19,249,772
- -----------------------------------------------------------------------------
 *Non-income producing security.
##SEC Rule 144A restriction.

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS

Statement of Assets and Liabilities
- ------------------------------------------------------------------------------
December 31, 1996
- ------------------------------------------------------------------------------
Assets:
  Investments, at value (identified cost, $18,705,930)           $19,779,888
  Cash                                                                10,862
  Receivable for Series shares sold                                   93,834
  Interest and dividends receivable                                  131,774
  Receivable from investment adviser                                  41,944
  Deferred organization expenses                                       5,535
  Other assets                                                           429
                                                                 -----------
      Total assets                                               $20,064,266
                                                                 -----------
Liabilities:
  Payable for Series shares reacquired                           $    10,444
  Payable for investments purchased                                  754,763
  Payable to affiliate for management fee                              1,167
  Accrued expenses and other liabilities                              48,120
                                                                 -----------
      Total liabilities                                          $   814,494
                                                                 -----------
Net assets                                                       $19,249,772
                                                                 ===========
Net assets consist of:
  Paid-in capital                                                $18,170,528
  Unrealized appreciation on investments and translation of
    assets and liabilities in foreign currencies                   1,073,950
  Accumulated undistributed net realized gain on investments
    and foreign currency transactions                                  5,068
  Accumulated undistributed net investment income                        226
                                                                 -----------
      Total                                                      $19,249,772
                                                                 ===========
Shares of beneficial interest outstanding                         1,404,528
                                                                  =========
Net asset value per share
  (net assets of $19,249,772 / 1,404,528 shares of beneficial
  interest outstanding)                                           $13.71
                                                                  ======

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS - continued

<TABLE>
<CAPTION>
Statement of Operations
- ------------------------------------------------------------------------------------------
Year Ended December 31, 1996
- ------------------------------------------------------------------------------------------
<S>                                                                             <C>       
Net investment income:
  Income -
    Interest                                                                    $  247,023
    Dividends                                                                      125,576
    Foreign taxes withheld                                                          (1,297)
                                                                                ----------
      Total investment income                                                   $  371,302
                                                                                ----------
  Expenses -
    Management fee                                                              $   60,979
    Trustees' compensation                                                           2,033
    Shareholder servicing agent fee                                                  2,799
    Auditing fees                                                                   59,356
    Printing                                                                        29,675
    Custodian fee                                                                    5,117
    Amortization of organization expenses                                            1,842
    Legal fees                                                                       1,214
    Miscellaneous                                                                    6,672
                                                                                ----------
      Total expenses                                                            $  169,687
    Fees paid indirectly                                                              (662)
    Reduction of expenses by investment adviser                                    (87,721)
                                                                                ----------
      Net expenses                                                              $   81,304
                                                                                ----------
        Net investment income                                                   $  289,998
                                                                                ----------
Realized and unrealized gain (loss) on investments:
  Realized gain (identified cost basis) -
    Investment transactions                                                     $  124,940
    Foreign currency transactions                                                      226
                                                                                ----------
      Net realized gain on investments and foreign currency transactions        $  125,166
                                                                                ----------
  Change in unrealized appreciation (depreciation) -
    Investments                                                                 $  823,214
    Translation of assets and liabilities in foreign currencies                         (8)
                                                                                ----------
      Net unrealized gain on investments and foreign currency translation       $  823,206
                                                                                ----------
        Net realized and unrealized gain on investments and foreign currency    $  948,372
                                                                                ----------
          Increase in net assets from operations                                $1,238,370
                                                                                ==========
</TABLE>

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS - continued

<TABLE>
<CAPTION>
Statements of Changes in Net Assets
- -----------------------------------------------------------------------------------------------------------------
                                                                               Year Ended           Period Ended
                                                                        December 31, 1996      December 31, 1995*
- -----------------------------------------------------------------------------------------------------------------
Increase (decrease) in net assets:
<S>                                                                           <C>                     <C>           
From operations -
  Net investment income                                                       $   289,998             $   55,290
  Net realized gain on investments and foreign currency transactions              125,166                 50,806
  Net unrealized gain on investments and foreign currency translation             823,206                250,744
                                                                              -----------             ----------
    Increase in net assets from operations                                    $ 1,238,370             $  356,840
                                                                              -----------             ----------
Distributions declared to shareholders -
  From net investment income                                                  $  (287,177)            $  (54,152)
  From net realized gain on investments and foreign currency transactions        (124,941)               (50,806)
  In excess of net realized gain on investments and foreign currency
    transactions                                                                --                           (14)
                                                                              -----------             ----------
      Total distributions declared to shareholders                            $  (412,118)            $ (104,972)
                                                                              -----------             ----------
Series share (principal) transactions -
  Net proceeds from sale of shares                                            $17,739,649             $3,794,238
  Net asset value of shares issued to shareholders in reinvestment of
    distributions                                                                 412,118                104,970
  Cost of shares reacquired                                                    (2,525,317)            (1,362,606)
                                                                              -----------             ----------
    Increase in net assets from Series share transactions                     $15,626,450             $2,536,602
                                                                              -----------             ----------
      Total increase in net assets                                            $16,452,702             $2,788,470
Net assets:
  At beginning of period                                                        2,797,070                  8,600
                                                                              -----------             ----------

  At end of period (including accumulated undistributed net investment
    income of $226 and $1,138, respectively)                                  $19,249,772             $2,797,070
                                                                              ===========             ==========

*For the period from the commencement of investment operations, January 3, 1995 to December 31, 1995.
</TABLE>

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS - continued

<TABLE>
<CAPTION>
Financial Highlights
- ---------------------------------------------------------------------------------------------------------
                                                                          Year Ended         Period Ended
                                                                   December 31, 1996   December 31, 1995*
- ---------------------------------------------------------------------------------------------------------
Per share data (for a share outstanding throughout each period):
<S>                                                                           <C>                  <C>   
Net asset value - beginning of period                                         $12.25               $10.00
                                                                              ------               ------
Income from investment operations# -
  Net investment income(S)                                                    $ 0.46               $ 0.41
  Net realized and unrealized gain on investments and foreign currency
    transactions                                                                1.30                 2.32
                                                                              ------               ------
    Total from investment operations                                          $ 1.76               $ 2.73
                                                                              ------               ------
Less distributions declared to shareholders -
  From net investment income                                                  $(0.21)              $(0.25)
  From net realized gain on investments and foreign currency
    transactions                                                               (0.09)               (0.23)
                                                                              ------               ------
    Total distributions declared to shareholders                              $(0.30)              $(0.48)
                                                                              ------               ------
Net asset value - end of period                                               $13.71               $12.25
                                                                              ======               ======
Total return                                                                  14.37%               27.34%++
Ratios (to average net assets)/Supplemental data(S):
  Expenses                                                                     1.00%                1.00%+
  Net investment income                                                        3.59%                3.83%+
Portfolio turnover                                                               76%                  16%
Average commission rate###                                                   $0.0485                  --
Net assets at end of period (000 omitted)                                    $19,250               $2,797

  *For the period from the commencement of investment operations, January 3, 1995 to December 31, 1995.
  +Annualized.
 ++Not annualized.
  #Per share data is based on average shares outstanding.
###Average commission rate is calculated for funds with fiscal years beginning on or after September 1, 1995.
(S)The Adviser voluntarily agreed to maintain the expenses of the Series at not more than 1.00% of average
   daily net assets. To the extent actual expenses were over these limitations, the net investment income per
   share and the ratios would have been:
    Net investment income                                                    $ 0.32                $ 0.22
    Ratios (to average net assets):
      Expenses                                                                2.10%                 2.49%+
      Net investment income                                                   2.49%                 2.09%+
</TABLE>

See notes to financial statements
<PAGE>
NOTES TO FINANCIAL STATEMENTS

(1) Business and Organization
MFS Total Return Series (the Series) is a diversified series of MFS Variable
Insurance Trust (the Trust) which is comprised of the following twelve series:
MFS Bond Series, MFS Emerging Growth Series, MFS Growth with Income Series,
MFS High Income Series, MFS Limited Maturity Series, MFS Money Market Series,
MFS Research Series, MFS Strategic Fixed Income Series, MFS Total Return
Series, MFS Utilities Series, MFS Value Series and MFS World Governments
Series. The Trust is organized as a Massachusetts business trust and is
registered under the Investment Company Act of 1940, as amended, as an open-
end management investment company.

The shareholders of each Series of the Trust are separate accounts of
insurance companies which offer variable annuity and/or life insurance
products. As of December 31, 1996 there were 20 shareholders in the Series.

(2) Significant Accounting Policies
General - The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.
Investments in foreign securities are vulnerable to the effects of changes in
the relative values of the local currency and the U.S. dollar and to the
effects of changes in each country's legal, political and economic
environment.

Investment Valuations - Equity securities listed on securities exchanges or
reported through the NASDAQ system are valued at last sale prices. Unlisted
equity securities or listed equity securities for which last sale prices are
not available are valued at last quoted bid prices. Debt securities (other
than short-term obligations which mature in 60 days or less), including listed
issues, are valued on the basis of valuations furnished by dealers or by a
pricing service with consideration to factors such as institutional-size
trading in similar groups of securities, yield, quality, coupon rate,
maturity, type of issue, trading characteristics and other market data,
without exclusive reliance upon exchange or over-the-counter prices. Short-
term obligations, which mature in 60 days or less, are valued at amortized
cost, which approximates market value. Securities for which there are no such
quotations or valuations are valued at fair value as determined in good faith
by or at the direction of the Trustees.

Foreign Currency Translation - Investment valuations, other assets, and
liabilities initially expressed in foreign currencies are converted each
business day into U.S. dollars based upon current exchange rates. Purchases
and sales of foreign investments, income and expenses are converted into U.S.
dollars based upon currency exchange rates prevailing on the respective dates
of such transactions. Gains and losses attributable to foreign currency
exchange rates on sales of securities are recorded for financial statement
purposes as net realized gains and losses on investments. Gains and losses
attributable to foreign exchange rate movements on income and expenses are
recorded for financial statement purposes as foreign currency transaction
gains and losses. That portion of both realized and unrealized gains and
losses on investments that result from fluctuations in foreign currency
exchange rates is not separately disclosed.

Deferred Organization Expenses - Costs incurred by the Series in connection
with its organization have been deferred and are being amortized on a
straight-line basis over a five-year period beginning on the date of
commencement of Series operations.

Investment Transactions and Income - Investment transactions are recorded on
the trade date. Interest income is recorded on the accrual basis. All premium
and original issue discount are amortized or accreted for financial statement
and tax reporting purposes as required by federal income tax regulations.
Dividend income is recorded on the ex-dividend date for dividends received in
cash. Dividend and interest payments received in additional securities are
recorded on the ex-dividend or ex-interest date in an amount equal to the
value of the security on such date.

Fees Paid Indirectly - The Series' custodian bank calculates its fee based on
the Series' average daily net assets. This fee is reduced according to an
expense offset arrangement with State Street Bank, the dividend disbursing
agent, which provides for partial reimbursement of custody fees based on a
formula developed to measure the value of cash deposited by the Series with
the custodian and with the dividend disbursing agent. This amount is shown as
a reduction of expenses on the Statement of Operations.

Tax Matters and Distributions - The Series' policy is to comply with the
provisions of the Internal Revenue Code (the Code) applicable to regulated
investment companies and to distribute to shareholders all of its taxable
income, including any net realized gain on investments. Accordingly, no
provision for federal income or excise tax is provided. The Series files a tax
return annually using tax accounting methods required under provisions of the
Code which may differ from generally accepted accounting principles, the basis
on which these financial statements are prepared. Accordingly, the amount of
net investment income and net realized gain reported on these financial
statements may differ from that reported on the Series' tax return and,
consequently, the character of distributions to shareholders reported in the
financial highlights may differ from that reported to shareholders on Form
1099-DIV. Foreign taxes have been provided for on interest and dividend income
earned on foreign investments in accordance with the applicable country's tax
rates and to the extent unrecoverable are recorded as a reduction of
investment income. The Series expects to pass through to shareholders foreign
income taxes paid. The election increases the taxable distributions of the
Series by the amount of the foreign taxes paid. An individual shareholder who
itemizes deductions, or a corporate shareholder, will be able to claim an
offsetting deduction or a tax credit (but not both) on their federal income
tax returns. Individuals who do not itemize deductions may claim a foreign tax
credit but not a deduction. The foreign source income is considered passive
income for the purpose of computing the foreign tax credit limitations.
Distributions to shareholders are recorded on the ex-dividend date.

The Series distinguishes between distributions on a tax basis and a financial
reporting basis and requires that only distributions in excess of tax basis
earnings and profits are reported in the financial statements as a tax return
of capital. Differences in the recognition or classification of income between
the financial statements and tax earnings and profits which result in
temporary over-distributions for financial statement purposes, are classified
as distributions in excess of net investment income or accumulated net
realized gains. During the year ended December 31, 1996, $1,124 was
reclassified from paid-in capital and $226 and $898 were reclassified to
accumulated undistributed net investment income and accumulated undistributed
net realized gain on investments and foreign currency transactions,
respectively, due to differences between book and tax accounting for currency
transactions. This change had no effect on the net assets or net asset value
per share. At December 31, 1996, accumulated undistributed net investment
income and accumulated undistributed net realized gain on investments and
foreign currency transactions under book accounting were different from tax
accounting due to temporary differences in accounting for tax spillbacks and
wash sales.

(3) Transactions with Affiliates
Investment Adviser - The Series has an investment advisory agreement with
Massachusetts Financial Services Company (MFS) to provide overall investment
advisory and administrative services, and general office facilities. The
management fee is computed daily and paid monthly at an annual rate of 0.75%
of average daily net assets. Under a temporary expense limitation agreement
with MFS, MFS has voluntarily agreed to pay all of the Series' operating
expenses, exclusive of management fees, which exceed 0.25% of the Series'
average daily net assets. The Series in turn will pay MFS an expense
reimbursement fee not greater than 0.25% of the Series' average daily net
assets. To the extent that the expense reimbursement fee exceeds the Series'
actual expenses, the excess will be applied to amounts paid by MFS in prior
years. At December 31, 1996, the aggregate unreimbursed expenses owed to MFS
by the Series amounted to $112,813, including $87,721 incurred in the current
year.

The Series pays no compensation directly to its Trustees who are officers of
the investment adviser, or to officers of the Series, all of whom receive
remuneration for their services to the Series from MFS. Certain officers and
Trustees of the Series are officers or directors of MFS and MFS Service
Center, Inc. (MFSC).

Shareholder Servicing Agent - MFSC, a wholly owned subsidiary of MFS, earns a
fee for its services as shareholder servicing agent. The fee is calculated as
a percentage of the average daily net assets at an effective annual rate of up
to 0.035%.

(4) Portfolio Securities
Purchases and sales of investments, other than purchased option transactions
and short-term obligations, were as follows:

                                                 Purchases             Sales
- ----------------------------------------------------------------------------
U.S. government securities                     $ 6,444,830        $2,530,636
                                               ===========        ==========
Investments (non-U.S. government securities)   $13,196,056        $2,933,540
                                               ===========        ==========

The cost and unrealized appreciation or depreciation in value of the
investments owned by the Series, as computed on a federal income tax basis,
are as follows:

Aggregate cost                                                    $18,705,930
                                                                  ===========
Gross unrealized appreciation                                     $ 1,159,676
Gross unrealized depreciation                                         (85,718)
                                                                  -----------
  Net unrealized appreciation                                     $ 1,073,958
                                                                  ===========

(5) Shares of Beneficial Interest
The Series' Declaration of Trust permits the Trustees to issue an unlimited
number of full and fractional shares of beneficial interest (without par
value). Transactions in Series shares were as follows:

<TABLE>
<CAPTION>
                                            Year Ended                        Period Ended
                                            December 31, 1996                 December 31, 1995*
                                            --------------------------------  ------------------------------
                                                   Shares            Amount         Shares           Amount
- ------------------------------------------------------------------------------------------------------------
<S>                                             <C>             <C>                <C>           <C>       
Shares sold                                     1,341,544       $17,739,649        333,436       $3,794,238
Shares issued to shareholders in
 reinvestment of distributions                     29,841           412,118          8,611          104,970
Shares reacquired                                (195,111)       (2,525,317)      (114,653)      (1,362,606)
                                                ---------       -----------        -------       ----------
  Net increase                                  1,176,274       $15,626,450        227,394       $2,536,602
                                                =========       ===========        =======       ==========

*For the period from the commencement of investment operations, January 3, 1995 to December 31, 1995.
</TABLE>

(6) Line of Credit
The Series entered into an agreement which enables it to participate with
other funds managed by MFS in an unsecured line of credit with a bank which
permits borrowings up to $350 million, collectively. Borrowings may be made to
temporarily finance the repurchase of Series shares. Interest is charged to
each fund, based on its borrowings, at a rate equal to the bank's base rate.
In addition, a commitment fee, based on the average daily unused portion of
the line of credit, is allocated among the participating funds at the end of
each quarter. The commitment fee allocated to the Series for the year ended
December 31, 1996 was $99.
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Trustees of MFS Variable Insurance Trust and Shareholders of MFS Total
Return Series:

We have audited the accompanying statement of assets and liabilities,
including the portfolio of investments, of MFS Total Return Series (the
Series) (one of the series constituting the MFS Variable Insurance Trust) as
of December 31, 1996, the related statement of operations for the year then
ended, the statements of changes in net assets and financial highlights for
the year then ended and for the period from January 3, 1995 (the commencement
of investment operations) to December 31, 1995. These financial statements and
financial highlights are the responsibility of the Series' management. Our
responsibility is to express an opinion on these financial statements and
financial highlights based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements and
financial highlights are free of material misstatement. An audit includes
examining, on a test basis, evidence supporting the amounts and disclosures in
the financial statements. Our procedures included confirmation of the
securities owned at December 31, 1996 by correspondence with the custodian and
brokers; where replies were not received from brokers, we performed other
auditing procedures. An audit also includes assessing the accounting
principles used and significant estimates made by management, as well as
evaluating the overall financial statement presentation. We believe that our
audits provide a reasonable basis for our opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of MFS Total Return
Series at December 31, 1996, the results of its operations, the changes in its
net assets, and its financial highlights for the respective stated periods in
conformity with generally accepted accounting principles.

DELOITTE & TOUCHE LLP

Boston, Massachusetts
February 7, 1997



                ---------------------------------------------
This report is prepared for the general information of shareholders. It is
authorized for distribution to prospective investors only when preceded or
accompanied by a current prospectus.
<PAGE>




                                                                  VTR 2/97 2.5M


<PAGE>

[Logo] M F S(SM)                                                  ANNUAL REPORT
INVESTMENT MANAGEMENT                                            FOR YEAR ENDED
                                                              DECEMBER 31, 1996
MFS(R) UTILITIES SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST


                               [Graphic Omitted]

<PAGE>

MFS(R) UTILITIES SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST


TRUSTEES                                       INVESTMENT ADVISER
A. Keith Brodkin*                              Massachusetts Financial Services
Chairman and President                           Company
                                               500 Boylston Street
Nelson J. Darling, Jr.                         Boston, MA 02116-3741
Trustee, Eastern Enterprises
(diversified holding company)                  DISTRIBUTOR
                                               MFS Fund Distributors, Inc.
William R. Gutow                               500 Boylston Street
Vice Chairman,                                 Boston, MA 02116-3741
Capitol Entertainment Management Company
(Blockbuster Video Franchise)                  SHAREHOLDER SERVICE CENTER
                                               MFS Service Center, Inc.
PORTFOLIO MANAGER                              P.O. Box 1400
Maura Shaughnessy*                             Boston, MA 02107-9906
                                               
TREASURER                                      For additional information,    
W. Thomas London*                              contact your financial adviser.
                                                                              
ASSISTANT TREASURER                            CUSTODIAN                      
James O. Yost*                                 Investors Bank & Trust Company 
                                                                              
SECRETARY                                      AUDITORS                       
Stephen E. Cavan*                              Deloitte & Touche LLP          
                                                                              
ASSISTANT SECRETARY                            WORLD WIDE WEB                 
James R. Bordewick, Jr.*                       www.mfs.com                    

*Affiliated with the Investment Adviser
<PAGE>

Dear Contract Owner:
The pattern of slow but sustainable growth seen in most of the world in 1996
seems likely to continue in 1997. While it looks like U.S. growth in 1997 will
slow modestly relative to 1996, there is evidence that Europe and, to a lesser
degree, Japan are continuing their recoveries from recession. At the same time,
companies in many emerging markets are reporting robust increases in earnings as
these markets benefit from higher-than-average economic growth and market
reforms, which should continue to provide more opportunities for development and
trade.

    After more than six years of expansion, the U.S. economy appears headed
toward another year of moderate growth in 1997, although a few signs point to
the possibility of a modest rise in inflation during the year. On the positive
side, the pattern of moderate growth and inflation set over the past few years
now seems fairly well entrenched in the economy and, short of a major
international or domestic crisis, appears to have enough momentum to remain on
track for some time. Recent gains in such important sectors as housing,
automobiles, industrial production, and exports indicate a fair amount of
underlying strength in the economy. However, some reason for caution can be seen
in the continuing high level of consumer debt and the attendant rise in personal
bankruptcies, as well as in the modestly disappointing levels of holiday sales.
Furthermore, the ongoing tightness in labor markets, and price rises in such
important sectors as energy, could add some inflationary pressures to the
economy. Given these somewhat conflicting indicators, we expect real
(inflation-adjusted) growth to revolve around 2% in 1997, which would represent
a modest decline from 1996.

    We continue to urge U.S. equity investors to lower their expectations for
1997 and to point out that the impressive gains of the past two years are not
sustainable. Just as the slowdown in corporate earnings growth and increases in
interest rates in 1996 raised some near-term concerns, further interest rate
increases and an acceleration of inflation could negatively affect the stock
market in 1997. However, to the extent that some slowdown in earnings means that
the economy is not overheating, this may be beneficial for the equity market in
the long run. Also, we believe many of the technology-driven productivity gains
that U.S. companies have made in recent years will continue to enhance corporate
America's competitiveness and profitability. Therefore, while we have some
near-term concerns, we remain reasonably positive about the long-term viability
of the equity market.

    In U.S. bond markets, conflicting signals over the strength of the economy
have created near-term volatility. Even comments by Federal Reserve Board
Chairman Alan Greenspan in late 1996 created some uncertainty over the Federal
Reserve's next move. We expect the Fed to maintain its anti-inflationary stance
should signs of more rapid economic growth and, particularly, higher inflation
resurface. While inflationary forces largely remained in check in 1996, the
continued strength in the labor market and rising energy prices mean that a
pickup in inflation is still possible. At the same time, the U.S. budget deficit
continues to decline and, as a percentage of gross domestic product, is now less
than 2%, which we consider a positive development for the bond markets. Although
interest rates may move higher over the coming months, we believe that, at
current levels, fixed-income markets remain equitably valued.

    Internationally, the environment of moderate growth, benign inflation, and
fairly steady interest rates is also providing support for investment markets
and should help support valuation levels in the coming year. Throughout the
world, the key to stock market performance in 1997 will be corporate earnings
growth. While U.S. earnings growth is slowing but still expected to be fairly
healthy, we anticipate that a number of European countries will see an
acceleration in earnings growth and improved valuations in 1997. Despite this
environment, many European countries trade at discounts to the United States. In
particular, we see opportunities in some of the multinationals and businesses
with the ability to generate steady earnings growth. In Japan, a recovery
appears to be taking place, but at a very modest rate, with valuations still at
high levels. In the emerging markets, the long-term economic growth story
remains intact and, although selectivity is even more important in these
markets, more companies are benefiting from this growth and trading at
below-average global valuations.

    Comments from the portfolio manager of the Series are presented below. We
appreciate your support and welcome any questions or comments you may have.

Respectfully,

/s/ A. Keith Brodkin                      /s/ Maura Shaughnessy

    A. Keith Brodkin                          Maura Shaughnessy
    Chairman and President                    Portfolio Manager

January 9, 1997


MFS UTILITIES SERIES
For the 12 months ended December 31, 1996, the Series provided a total return of
18.51%, which compares to a 3.12% return for the Standard & Poor's Utility Index
(the Utility Index), an unmanaged, market-value weighted, total-return index of
all utility stocks in the Standard & Poor's 500 Composite Index (the S&P 500).

    The Series' performance benefited from its overweighting in natural gas
stocks, which were terrific performers in 1996. Also, two of the Series' larger
holdings, Portland General and MCI Communications, were bought out by Enron and
British Telephone, respectively. Electric utility stocks comprise a large
portion of the Series' equity position, and although electric utilities are
facing a period of deregulation, the pace of change is slower than had been
anticipated, which is favorable for these stocks, while certain companies are
preparing themselves to thrive in the new environment. Meanwhile, natural gas
companies are benefiting from stronger-than-expected earnings growth due to
robust earnings from nonregulated businesses.

    Generally, the Series' assets are more interest rate sensitive than the
overall market, and while the weak bond market in the first half of the Series'
fiscal year hurt utility stocks, its recent strengthening has helped them.

    The Series was underweighted in telecommunications stocks for the entire
year. The passage of the federal Telecommunications Act placed an overhang of
uncertainty on these stocks, and we expect it will be several years before we
know who the winners and losers are from this legislation. For the large-
capitalization stocks in this sector, we expect earnings per share growth to
decline.

    About 20% of the Series is invested internationally. Typically, while they
may carry more risk, international markets can offer much higher growth and, at
times, a more constructive regulatory environment than the United States.
PowerGen, a U.K. electric generating company, is one of the cheapest utilities
in the world based on growth relative to its earnings and cash flow generation.
Telefonica del Peru, meanwhile, is enjoying an excellent combination of robust
growth and rational regulation.

    Another 10% of assets is invested in REITs (real estate investment trusts),
which we believe offer higher yields and stronger dividend growth than the
typical utility. Our strategy is to hold a diversified group including health
care, self-storage, hotel, apartment, office, and industrial REITs.

PORTFOLIO MANAGER'S PROFILE
Maura Shaughnessy joined MFS in 1991 as an equity analyst. A graduate of Colby
College and the Amos Tuck School of Business at Dartmouth College, she was
promoted to Assistant Vice President in 1992 and Vice President in 1993. She has
managed MFS Utilities Series since January 1995. Ms. Shaughnessy is a Chartered
Financial Analyst.

FEDERAL INCOME TAX INFORMATION ON DISTRIBUTIONS
The MFS Utilities Series has designated $139,948.00 as a long-term capital gain.

DIVIDENDS-RECEIVED DEDUCTION
For the year ended December 31, 1996, the amount of distributions from income
eligible for the 70% dividends-received deduction for corporations, came to
17.55%.

PERFORMANCE SUMMARY
The information below illustrates the historical performance of MFS Utilities
Series shares in comparison to various market indicators. Benchmark comparisons
are unmanaged and do not reflect any fees or expenses. You cannot invest in an
index.

GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT 
(For the Period from January 1, 1995 to December 31, 1996)

      MFS Utilities Series     Consumer Price Index - U.S.    S&P Utility Index

 1/95      10000.0                      10000.0                     10000.0
 6/95      11260.0                      10187.0                     11484.0
12/95      13394.0                      10247.0                     14113.0
 6/96      13969.0                      10464.0                     14119.0
12/96      15873.0                      10615.0                     14553.0

AVERAGE ANNUAL TOTAL RETURNS AS OF DECEMBER 31, 1996
                                                     1 Year           Life(+)
- ------------------------------------------------------------------------------
MFS Utilities Series                                 +18.51%          +26.07%
- ------------------------------------------------------------------------------
Standard & Poor's Utility Index**                    + 3.12%          +20.64%
- ------------------------------------------------------------------------------
Consumer Price Index*                                + 3.59%          + 3.04%
- ------------------------------------------------------------------------------
 + For the period from the commencement of investment operations, January 3,
   1995 to December 31, 1996.
** Source: Lipper Analytical Services.
 * The Consumer Price Index is a popular measure of change in prices. 

Returns shown do not reflect the deduction of the mortality and expense risk
charges and administration fees. Please refer to the product's annual report for
performance that reflects the fees and charges imposed by insurance company
separate accounts.

Investment return and principal value will fluctuate, and shares, when redeemed,
may be worth more or less than their original cost. Past performance is no
guarantee of future results.

Series results reflect any applicable expense subsidies and waivers, without
which the performance results would have been less favorable. Subsidies and
waivers may be rescinded at any time. See the prospectus for details.

<PAGE>

PORTFOLIO OF INVESTMENTS - December 31, 1996
Non-Convertible Bonds - 16.4%
- -----------------------------------------------------------------------------
                                               Principal Amount
Issuer                                            (000 Omitted)         Value
- -----------------------------------------------------------------------------
U.S. Bonds - 16.1%
  Financial Institutions - 0.2%
    Boise Cascade Corp., 7.43s, 2005                    $    15      $   15,225
    Equitable Life Assurance, 7.7s, 2015                      3           2,999
    Liberty Mutual Insurance Co., 8.2s, 2007##                5           5,310
                                                                     ----------
                                                                     $   23,534
- -------------------------------------------------------------------------------
  Real Estate Investment Trust - 0.3%
    Loewen Group International, Inc., 7.75s, 2001##     $    25      $   25,438
- -------------------------------------------------------------------------------
  Telecommunications - 0.3%
    Continental Cablevision, 8.3s, 2006                 $    25      $   26,632
- -------------------------------------------------------------------------------
  U.S. Treasury Obligations - 9.5%
    U.S. Treasury Notes, 5.875s, 1998                   $   271      $  271,127
    U.S. Treasury Notes, 6.5s, 2006                          40          40,218
    U.S. Treasury Notes, 7s, 2006                           255         264,922
    U.S. Treasury Bonds, 7.625s, 2025                       300         333,234
    U.S. Treasury Bonds, 6.75s, 2026                          5           5,037
                                                                     ----------
                                                                     $  914,538
- -------------------------------------------------------------------------------
  Utilities - Electric - 1.8%
    Arkansas Power & Light Co., 8.75s, 2026             $    10      $   10,302
    First PV Funding Corp., 10.3s, 2014                      25          26,625
    First PV Funding Corp., 10.15s, 2016                     25          26,562
    Long Island Lighting Co., 9s, 2022                       25          26,313
    Louisiana Power & Light Co., 8.75s, 2026                  5           5,056
    Montana Power Co., 7.875s, 2026                          25          25,219
    System Energy Resources, 7.38s, 2000                     50          49,852
                                                                     ----------
                                                                     $  169,929
- -------------------------------------------------------------------------------
  Utilities - Gas - 3.7%
    Coastal Corp., 7.75s, 2035                          $    50      $   49,625
    Husky Oil Ltd., 7.125s, 2006                            100         100,500
    Louis Dreyfus Natural Gas Corp., 9.25s, 2004             25          26,281
    Oryx Energy Co., 10s, 2001                               25          27,442
    Tosco Corp., 7.625s, 2006                               125         129,053
    Transcontinental Gas, 7.25s, 2026                        25          24,500
                                                                     ----------
                                                                     $  357,401
- -------------------------------------------------------------------------------
  Other - 0.3%
    Delta Air Lines Inc., 8.5s, 2002                    $    25      $   26,470
- -------------------------------------------------------------------------------
Total U.S. Bonds                                                     $1,543,942
- -------------------------------------------------------------------------------
Foreign Bonds - 0.3%
  Canada - 0.1%
    Fairfax Financial Holdings, 8.3s, 2026
      (Financial Institutions)                          $     5      $    5,208
    Enersis S A, 6.9s, 2006 (Computer Services)               5           4,869
                                                                     ----------
                                                                     $   10,077
- -------------------------------------------------------------------------------
  Chile - 0.2%
    Empresa Electric Del Norts, 7.75s, 2006
      (Utilities - Electric)##                          $    20      $   20,163
- -------------------------------------------------------------------------------
Total Foreign Bonds                                                  $   30,240
- -------------------------------------------------------------------------------
Total Non-Convertible Bonds (Identified Cost, $1,602,900)            $1,574,182
- -------------------------------------------------------------------------------
Stocks - 78.8%
- -------------------------------------------------------------------------------
Issuer                                                   Shares           Value
- -------------------------------------------------------------------------------
U.S. Stocks - 61.3%
  Consumer Goods and Services - 1.3%
    Philip Morris Cos., Inc.                              1,100      $  123,888
- -------------------------------------------------------------------------------
  Real Estate Investment Trusts - 11.4%
    American General Hospitality Corp.                    5,700      $  135,375
    Boykin Lodging Co.                                    3,600          86,400
    Brandywine Realty Trust                               5,600         109,200
    First Industrial Realty Trust, Inc.                   1,100          33,413
    Hospitality Properties Trust                          3,900         113,100
    Innkeepers USA Trust                                  6,400          88,800
    National Health Investors, Inc.                       1,850          70,069
    Oasis Residential, Inc.                               2,900          65,975
    Prentiss Properties Trust                             3,000          75,000
    Shurgard Storage Centers, Inc.                          800          23,700
    Sovran Self Storage, Inc.                             2,000          62,500
    Storage Trust Realty                                  5,400         145,800
    Winston Hotels, Inc.                                  5,800          79,025
                                                                     ----------
                                                                     $1,088,357
- -------------------------------------------------------------------------------
  Utilities - Electric - 23.2%
    Allegheny Power Systems, Inc.                         1,700      $   51,638
    Boston Edison Co.                                     4,400         118,250
    CMS Energy Corp.                                      6,950         233,694
    Cinergy Corp.                                         2,800          93,450
    Edison International                                  5,100         101,363
    FPL Group, Inc.                                       1,100          50,600
    GPU, Inc.                                             4,500         151,313
    Illinova Corp.                                        5,500         151,250
    NIPSCO Industries, Inc.                               2,900         114,913
    Pacific Gas & Electric Co.                            4,500          94,500
    Pinnacle West Capital Corp.                           2,500          79,375
    Portland General Corp.                                3,200         134,400
    Public Service Company of Colorado                    2,300          89,413
    Public Service Company of New Mexico                 12,300         241,387
    Sierra Pacific Resources                              9,600         276,000
    Texas Utilities Co.                                   1,700          69,275
    Unicom Corp.                                          1,800          48,825
    Utilicorp United, Inc.                                4,500         121,500
                                                                     ----------
                                                                     $2,221,146
- -------------------------------------------------------------------------------
  Utilities - Gas - 11.9%
    Atmos Energy Corp.                                      700      $   16,713
    Coastal Corp.                                         1,900          92,863
    Columbia Gas Systems, Inc.                            2,100         133,612
    El Paso Natural Gas Co.                               1,800          90,900
    Energen Corp.                                           500          15,125
    K N Energy, Inc.                                      3,100         121,675
    Noble Affiliates, Inc.                                1,100          52,662
    PanEnergy Corp.                                       3,500         157,500
    Sonat, Inc.                                           1,900          97,850
    Tejas Gas Corp.*                                        700          33,338
    Union Pacific Resources Group, Inc.                   2,400          70,200
    Westcoast Energy, Inc.                                2,920          48,910
    Western Gas Resources, Inc.                           5,700         109,725
    Williams Cos., Inc.                                   2,700      $  101,250
                                                                     ----------
                                                                     $1,142,323
- -------------------------------------------------------------------------------
  Utilities - Telephone - 13.5%
    BCE, Inc.                                             1,100      $   52,525
    BellSouth Corp.                                       1,500          60,562
    Frontier Corp.                                        2,900          65,613
    GTE Corp.                                             3,700         168,350
    ICG Communications, Inc.*                             4,800          84,600
    MCI Communications Corp.                              5,900         192,856
    MFS Communications Co., Inc.                          4,700         256,150
    NYNEX Corp.                                           2,000          96,250
    Pacific Telesis Group                                 3,300         121,275
    SBC Communications, Inc.                              1,600          82,800
    Telephone & Data Systems, Inc.                        3,000         108,750
                                                                     ----------
                                                                     $1,289,731
- -------------------------------------------------------------------------------
Total U.S. Stocks                                                    $5,865,445
- -------------------------------------------------------------------------------
Foreign Stocks - 17.5%
  Argentina - 1.0%
    Central Costenera, ADR (Utilities - Electric)##       3,200      $   97,937
- -------------------------------------------------------------------------------
  Brazil - 2.3%
    Centrais Electricas Brasileiras S.A.,
      ADR (Utilities - Electric)                          3,700      $   68,723
    Telecomunicacoes Brasileiras S.A., ADR
      (Utilities - Telephone)                             2,000         153,000
                                                                     ----------
                                                                     $  221,723
- -------------------------------------------------------------------------------
  Canada - 0.5%
    TransCanada Pipe Lines Ltd. (Utilities - Gas)         2,700      $   47,250
- -------------------------------------------------------------------------------
  Chile - 1.8%
    Chilectra S.A., ADR (Utilities - Electric)            2,200      $  117,700
    Chilgener S.A., ADR (Utilities - Electric)            2,700          56,362
                                                                     ----------
                                                                     $  174,062
- -------------------------------------------------------------------------------
  Italy - 1.0%
    Telecom Italia S.p.A. Di Risp
      (Utilities - Telephone)                            67,400      $   95,964
- -------------------------------------------------------------------------------
  Peru - 1.8%
    Telefonica del Peru S.A.,
      ADR (Utilities - Telephone)                         7,900      $  149,112
    Telefonica del Peru S.A.,
      "B" (Utilities - Telephone)                        14,500          27,083
                                                                     ----------
                                                                     $  176,195
- -------------------------------------------------------------------------------
  Philippines - 0.3%
    Pilpino Telephone (Utilities - Telephone)            29,000      $   24,534
- -------------------------------------------------------------------------------
  Portugal - 1.1%
    Portugal Telecom S.A., ADR (Utilities - Telephone)    2,400      $   67,800
    Portugal Telecom S.A. (Utilities - Telephone)         1,200          34,164
                                                                     ----------
                                                                     $  101,964
- -------------------------------------------------------------------------------
  South Korea - 0.8%
    Korea Mobile Telecommunications, ADR
      (Utilities - Telephone)*                            6,180      $   79,567
- -------------------------------------------------------------------------------
  Spain - 2.6%
    Empresa Nacional de Electricidad, ADR
      (Utilities - Electric)                              1,300      $   91,000
    Empresa Nacional de Electricidad, ADR
      (Utilities - Electric)                              1,800          27,900
    Iberdrola S.A. (Utilities - Electric)                 6,100          86,288
    Telefonica de Espana S.A., ADR
      (Utilities - Telephone)                               600      $   41,550
                                                                     ----------
                                                                     $  246,738
- -------------------------------------------------------------------------------
  United Kingdom - 4.3%
    National Grid Group PLC (Utilities - Electric)       27,000      $   90,099
    National Power PLC (Utilities - Electric)            11,400          95,504
    PowerGen PLC (Utilities - Electric)                  22,800         223,180
                                                                     ----------
                                                                     $  408,783
- -------------------------------------------------------------------------------
Total Foreign Stocks                                                 $1,674,717
- -------------------------------------------------------------------------------
Total Stocks (Identified Cost, $6,899,724)                           $7,540,162
- -------------------------------------------------------------------------------
Foreign Convertible Preferred Stock - 0.1%
- -------------------------------------------------------------------------------
Argentina
  Compania Inversiones Telephone, 7%
    (Utilities - Telephone)##
    (Identified Cost, $5,775)                               100      $    5,200
- -------------------------------------------------------------------------------
Short-Term Obligation - 4.4%
- -------------------------------------------------------------------------------
                                               Principal Amount
                                                  (000 Omitted)
- -------------------------------------------------------------------------------
  Student Loan Marketing Assn., due 1/02/97,
    at Amortized Cost                                   $   420      $  419,854
- -------------------------------------------------------------------------------
Total Investments (Identified Cost, $8,928,253)                      $9,539,398
Other Assets, Less Liabilities - 0.3%                                    32,743
- -------------------------------------------------------------------------------
Net Assets - 100.0%                                                  $9,572,141
- -------------------------------------------------------------------------------
 *Non-income producing security.
##SEC Rule 144A restriction.

See notes to financial statements

<PAGE>

FINANCIAL STATEMENTS

Statement of Assets and Liabilities
- ------------------------------------------------------------------------------
December 31, 1996
- ------------------------------------------------------------------------------
Assets:
  Investments, at value (identified cost, $8,928,253)             $9,539,398
  Cash                                                                10,176
  Receivable for Series shares sold                                   64,821
  Receivable for investments sold                                     53,579
  Interest and dividends receivable                                   68,278
  Receivable from investment adviser                                  37,645
  Deferred organization expenses                                       5,535
  Other assets                                                            26
                                                                  ----------
      Total assets                                                $9,779,458
                                                                  ----------
Liabilities:
  Distributions payable                                           $       71
  Payable for Series shares reacquired                                 8,676
  Payable for investments purchased                                  156,022
  Payable to affiliate for management fee                                552
  Accrued expenses and other liabilities                              41,996
                                                                  ----------
      Total liabilities                                           $  207,317
                                                                  ----------
Net assets                                                        $9,572,141
                                                                  ==========
Net assets consist of:
  Paid-in capital                                                 $8,962,715
  Unrealized appreciation on investments and translation of
    assets and liabilities in foreign currencies                     611,242
  Accumulated net realized loss on investments and foreign
    currency transactions                                             (1,816)
                                                                  ----------
      Total                                                       $9,572,141
                                                                  ==========
Shares of beneficial interest outstanding                          700,567
                                                                   =======
Net asset value per share
  (net assets of $9,572,141 / 700,567 shares of beneficial
  interest outstanding)                                            $13.66
                                                                   ======

See notes to financial statements

<PAGE>

FINANCIAL STATEMENTS - continued

Statement of Operations
- ------------------------------------------------------------------------------
Year Ended December 31, 1996
- ------------------------------------------------------------------------------
Net investment income:
  Income -
    Dividends                                                      $  206,973
    Interest                                                           79,239
    Foreign taxes withheld                                            (11,554)
                                                                   ----------
      Total investment income                                      $  274,658
                                                                   ----------
  Expenses -
    Management fee                                                 $   39,863
    Trustees' compensation                                              2,033
    Shareholder servicing agent fee                                     1,841
    Auditing fees                                                      47,656
    Printing                                                           44,183
    Custodian fee                                                       3,367
    Amortization of organization expenses                               1,842
    Legal fees                                                          1,214
    Miscellaneous                                                       3,590
                                                                   ----------
      Total expenses                                               $  145,589
    Fees paid indirectly                                                 (562)
    Reduction of expenses by investment adviser                       (91,877)
                                                                   ----------
      Net expenses                                                 $   53,150
                                                                   ----------
        Net investment income                                      $  221,508
                                                                   ----------
Realized and unrealized gain on investments:
  Realized gain (identified cost basis) -
    Investment transactions                                        $  562,324
    Foreign currency transactions                                         739
                                                                   ----------
      Net realized gain on investments and foreign currency
        transactions                                               $  563,063
                                                                   ----------
  Change in unrealized appreciation -
    Investments                                                    $  375,075
    Translation of assets and liabilities in foreign currencies           175
                                                                   ----------
      Net unrealized gain on investments and foreign currency
        translation                                                $  375,250
                                                                   ----------
        Net realized and unrealized gain on investments and
          foreign currency                                         $  938,313
                                                                   ----------
          Increase in net assets from operations                   $1,159,821
                                                                   ==========
See notes to financial statements

<PAGE>

FINANCIAL STATEMENTS - continued

Statements of Changes in Net Assets
- ------------------------------------------------------------------------------
                                              Year Ended         Period Ended
                                       December 31, 1996   December 31, 1995*
- ------------------------------------------------------------------------------
Increase (decrease) in net assets:
From operations -
  Net investment income                      $   221,508          $    45,685
  Net realized gain on investments
    and foreign currency transactions            563,063              103,820
  Net unrealized gain on investments
    and foreign currency translation             375,250              235,992
                                             -----------          -----------
    Increase in net assets from
      operations                             $ 1,159,821          $   385,497
                                             -----------          -----------
Distributions declared to shareholders -
  From net investment income                 $  (219,486)         $   (42,590)
  From net realized gain on investments
    and foreign currency transactions           (565,934)            (100,949)
  In excess of net realized gain on
    investments and foreign currency
    transactions                                  (3,558)               --
                                             -----------          -----------
      Total distributions declared to
        shareholders                         $  (788,978)         $  (143,539)
                                             -----------          -----------
Series share (principal) transactions -
  Net proceeds from sale of shares           $10,713,267          $ 3,789,585
  Net asset value of shares issued to
    shareholders in reinvestment of
    distributions                                788,907              143,519
  Cost of shares reacquired                   (4,674,045)          (1,810,493)
                                             -----------          -----------
    Increase in net assets from
      Series share transactions              $ 6,828,129          $ 2,122,611
                                             -----------          -----------
      Total increase in net assets           $ 7,198,972          $ 2,364,569
Net assets:
  At beginning of period                       2,373,169                8,600
                                             -----------          -----------
  At end of period (including
    accumulated undistributed net
    investment income of $0 and
    $3,095, respectively)                    $ 9,572,141          $ 2,373,169
                                             ===========          ===========
*For the period from the commencement of investment operations, January 3,
1995 to December 31, 1995.

See notes to financial statements

<PAGE>

FINANCIAL STATEMENTS - continued

Financial Highlights
- --------------------------------------------------------------------------------
                                                Year Ended        Period Ended 
                                         December 31, 1996  December 31, 1995* 
- --------------------------------------------------------------------------------
Per share data (for a share                                                     
  outstanding throughout each period):                                          
Net asset value - beginning of period               $12.57              $10.00 
                                                    ------              ------ 
Income from investment operations# -                                            
  Net investment income(S)                          $ 0.55              $ 0.39 
  Net realized and unrealized gain on                                           
    investments and foreign currency                                            
    transactions                                      1.78                3.00 
                                                    ------              ------ 
    Total from investment operations                $ 2.33              $ 3.39 
                                                    ------              ------ 
Less distributions declared to                                                  
  shareholders -                                                                
  From net investment income                        $(0.35)             $(0.24)
  From net realized gain on                                                     
    investments and foreign currency                                            
    transactions                                     (0.88)              (0.58)
  In excess of realized gain on                                                 
    investments and foreign currency                                            
    transactions                                     (0.01)               --   
                                                    ------              ------ 
      Total distributions declared to shareholders  $(1.24)             $(0.82)
                                                    ------              ------ 
Net asset value - end of period                     $13.66              $12.57 
                                                    ======               ====== 
Total return                                        18.51%              33.94%++
Ratios (to average net assets)/Supplemental data(S):
  Expenses                                           1.00%               1.00%+ 
  Net investment income                              4.19%               3.66%+ 
Portfolio turnover                                    121%                 94% 
Average commission rate###                          $0.041                      
                                                         6                --   
Net assets at end of period (000 omitted)           $9,572              $2,373 

  * For the period from the commencement of investment operations, January 3,
    1995 to December 31, 1995.
  + Annualized.
 ++ Not annualized.
  # Per share data is based on average shares outstanding.
### Average commission rate is calculated for funds with fiscal years beginning
    on or after September 1, 1995.
(S) The Adviser voluntarily agreed to maintain the expenses of the Series at not
    more than 1.00% of average daily net assets. To the extent actual expenses
    were over these limitations, the net investment income per share and the
    ratios would have been:
    Net investment income                           $ 0.32               $ 0.17
    Ratios (to average net assets):                                             
      Expenses                                       2.75%                3.08%+
      Net investment income                          2.44%                1.62%+

See notes to financial statements                   
<PAGE>

NOTES TO FINANCIAL STATEMENTS
(1) Business and Organization
MFS Utilities Series (the Series) is a non-diversified series of MFS Variable
Insurance Trust (the Trust) which is comprised of the following 12 series: MFS
Bond Series, MFS Emerging Growth Series, MFS Growth with Income Series, MFS High
Income Series, MFS Limited Maturity Series, MFS Money Market Series, MFS
Research Series, MFS Strategic Fixed Income Series, MFS Total Return Series, MFS
Utilities Series, MFS Value Series and MFS World Governments Series. The Trust
is organized as a Massachusetts business trust and is registered under the
Investment Company Act of 1940, as amended, as an open-end management investment
company.

The shareholders of each Series of the Trust are separate accounts of insurance
companies which offer variable annuity and/or life insurance products. As of
December 31, 1996 there were 16 shareholders in the Series.

(2) Significant Accounting Policies
General - The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates. Investments
in foreign securities are vulnerable to the effects of changes in the relative
values of the local currency and the U.S. dollar and to the effects of changes
in each country's legal, political and economic environment.

Investment Valuations - Equity securities listed on securities exchanges or
reported through the NASDAQ system are valued at last sale prices. Unlisted
equity securities or listed equity securities for which last sale prices are not
available are valued at last quoted bid prices. Debt securities (other than
short-term obligations which mature in 60 days or less), including listed issues
and forward contracts, are valued on the basis of valuations furnished by
dealers or by a pricing service with consideration to factors such as
institutional-size trading in similar groups of securities, yield, quality,
coupon rate, maturity, type of issue, trading characteristics and other market
data, without exclusive reliance upon exchange or over-the-counter prices.
Short-term obligations, which mature in 60 days or less, are valued at amortized
cost, which approximates market value. Securities for which there are no such
quotations or valuations are valued at fair value as determined in good faith by
or at the direction of the Trustees.

Foreign Currency Translation - Investment valuations, other assets, and
liabilities initially expressed in foreign currencies are converted each
business day into U.S. dollars based upon current exchange rates. Purchases and
sales of foreign investments, income and expenses are converted into U.S.
dollars based upon currency exchange rates prevailing on the respective dates of
such transactions. Gains and losses attributable to foreign currency exchange
rates on sales of securities are recorded for financial statement purposes as
net realized gains and losses on investments. Gains and losses attributable to
foreign exchange rate movements on income and expenses are recorded for
financial statement purposes as foreign currency transaction gains and losses.
That portion of both realized and unrealized gains and losses on investments
that result from fluctuations in foreign currency exchange rates is not
separately disclosed.

Deferred Organization Expenses - Costs incurred by the Series in connection with
its organization have been deferred and are being amortized on a straight-line
basis over a five-year period beginning on the date of commencement of Series
operations.

Forward Foreign Currency Exchange Contracts - The Series may enter into forward
foreign currency exchange contracts for the purchase or sale of a specific
foreign currency at a fixed price on a future date. Risks may arise upon
entering into these contracts from the potential inability of counterparties to
meet the terms of their contracts and from unanticipated movements in the value
of a foreign currency relative to the U.S. dollar. The Series will enter into
forward contracts for hedging purposes as well as for non-hedging purposes. For
hedging purposes, the Series may enter into contracts to deliver or receive
foreign currency it will receive from or require for its normal investment
activities. The Series may also use contracts in a manner intended to protect
foreign currency-denominated securities from declines in value due to
unfavorable exchange rate movements. For non-hedging purposes, the Series may
enter into contracts with the intent of changing the relative exposure of the
Series' portfolio of securities to different currencies to take advantage of
anticipated changes. The forward foreign currency exchange contracts are
adjusted by the daily exchange rate of the underlying currency and any gains or
losses are recorded for financial statement purposes as unrealized until the
contract settlement date.

Investment Transactions and Income - Investment transactions are recorded on the
trade date. Interest income is recorded on the accrual basis. All premium and
original issue discount are amortized or accreted for financial statement and
tax reporting purposes as required by federal income tax regulations. Dividend
income is recorded on the ex-dividend date for dividends received in cash.
Dividend and interest payments received in additional securities are recorded on
the ex-dividend or ex-interest date in an amount equal to the value of the
security on such date.

Fees Paid Indirectly - The Series' custodian bank calculates its fee based on
the Series' average daily net assets. This fee is reduced according to an
expense offset arrangement with State Street Bank, the dividend disbursing
agent, which provides for partial reimbursement of custody fees based on a
formula developed to measure the value of cash deposited by the Series with the
custodian and with the dividend disbursing agent. This amount is shown as a
reduction of expenses on the Statement of Operations.

Tax Matters and Distributions - The Series' policy is to comply with the
provisions of the Internal Revenue Code (the Code) applicable to regulated
investment companies and to distribute to shareholders all of its taxable
income, including any net realized gain on investments. Accordingly, no
provision for federal income or excise tax is provided. The Series files a tax
return annually using tax accounting methods required under provisions of the
Code which may differ from generally accepted accounting principles, the basis
on which these financial statements are prepared. Accordingly, the amount of net
investment income and net realized gain reported on these financial statements
may differ from that reported on the Series' tax return and, consequently, the
character of distributions to shareholders reported in the financial highlights
may differ from that reported to shareholders on Form 1099-DIV. Foreign taxes
have been provided for on interest and dividend income earned on foreign
investments in accordance with the applicable country's tax rates and to the
extent unrecoverable are recorded as a reduction of investment income. The
Series expects to pass through to shareholders foreign income taxes paid. The
election increases the taxable distributions of the Series by the amount of the
foreign taxes paid. An individual shareholder who itemizes deductions, or a
corporate shareholder, will be able to claim an offsetting deduction or a tax
credit (but not both) on their federal income tax returns. Individuals who do
not itemize deductions may claim a foreign tax credit but not a deduction. The
foreign source income is considered passive income for the purpose of computing
the foreign tax credit limitations. Distributions to shareholders are recorded
on the ex-dividend date.

The Series distinguishes between distributions on a tax basis and a financial
reporting basis and requires that only distributions in excess of tax basis
earnings and profits are reported in the financial statements as a tax return of
capital. Differences in the recognition or classification of income between the
financial statements and tax earnings and profits which result in temporary
over-distributions for financial statement purposes, are classified as
distributions in excess of net investment income or accumulated net realized
gains. During the year ended Decemer 31, 1996, $5,117 was reclassified from
accumulated undistributed net investment income and $1,742 and $3,376 were
reclassified to accumulated net realized loss on investments and foreign
currency transactions and paid-in capital, respectively, due to differences
between book and tax accounting for real estate investment trusts and currency
transactions. This change had no effect on the net assets or net asset value per
share. At December 31, 1996, accumulated net realized loss on investments and
foreign currency transactions under book accounting were different from tax
accounting due to temporary differences in accounting for wash sales.

(3) Transactions with Affiliates
Investment Adviser - The Series has an investment advisory agreement with
Massachusetts Financial Services Company (MFS) to provide overall investment
advisory and administrative services, and general office facilities. The
management fee is computed daily and paid monthly at an annual rate of 0.75% of
average daily net assets. Under a temporary expense limitation agreement with
MFS, MFS has voluntarily agreed to pay all of the Series' operating expenses,
exclusive of management fees, which exceed 0.25% of average daily net assets.
The Series in turn will pay MFS an expense reimbursement fee not greater than
0.25% of the Series' average daily net assets. To the extent that the expense
reimbursement fee exceeds the Series' actual expenses, the excess will be
applied to amounts paid by MFS in prior years. At December 31, 1996, the
aggregate unreimbursed expenses owed to MFS by the Series amounted to $117,390,
including $91,877 incurred in the current year.

The Series pays no compensation directly to its Trustees who are officers of the
investment adviser, or to officers of the Series, all of whom receive
remuneration for their services to the Series from MFS. Certain officers and
Trustees of the Series are officers or directors of MFS and MFS Service Center,
Inc. (MFSC).

Shareholder Servicing Agent - MFSC, a wholly owned subsidiary of MFS, earns a
fee for its services as shareholder servicing agent. The fee is calculated as a
percentage of the average daily net assets at an effective annual rate of up to
0.035%.

(4) Portfolio Securities
Purchases and sales of investments, other than purchased option transactions and
short-term obligations, were as follows:

                                                        Purchases       Sales
- ------------------------------------------------------------------------------
U.S. government securities                            $ 1,962,349  $1,264,570
                                                      ===========  ==========
Investments (non-U.S. government securities)          $10,603,151  $5,257,370
                                                      ===========  ==========

The cost and unrealized appreciation or depreciation in value of the investments
owned by the Series, as computed on a federal income tax basis, are as follows:

Aggregate cost                                                     $8,928,253
                                                                   ==========
Gross unrealized appreciation                                         826,690
Gross unrealized depreciation                                        (215,545)
                                                                   ----------
    Net unrealized appreciation                                    $  611,145
                                                                   ==========

(5) Shares of Beneficial Interest
The Series' Declaration of Trust permits the Trustees to issue an unlimited
number of full and fractional shares of beneficial interest (without par value).
Transactions in Series shares were as follows:

                        Year Ended                   Period Ended
                        December 31, 1996            December 31, 1995*
                        ------------------------     -------------------------
                         Shares           Amount       Shares          Amount
- ------------------------------------------------------------------------------
Shares sold             809,814      $10,713,267      322,691     $ 3,789,585
Shares issued to
 shareholders in
 reinvestment
 of distributions        57,710          788,907       11,463         143,519
Shares reacquired      (355,735)      (4,674,045)    (146,236)     (1,810,493)
                       --------       ----------     --------     -----------
  Net increase          511,789      $ 6,828,129      187,918     $ 2,122,611
                        =======      ===========      =======     ===========

*For the period from the commencement of investment operations, January 3, 1995
to December 31, 1995.

(6) Line of Credit
The Series entered into an agreement which enables it to participate with other
funds managed by MFS in an unsecured line of credit with a bank which permits
borrowings up to $350 million, collectively. Borrowings may be made to
temporarily finance the repurchase of Series shares. Interest is charged to each
fund, based on its borrowings, at a rate equal to the bank's base rate. In
addition, a commitment fee, based on the average daily unused portion of the
line of credit, is allocated among the participating funds at the end of each
quarter. The commitment fee allocated to the Series for the year ended December
31, 1996 was $60.
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Trustees of MFS Variable Insurance Trust and Shareholders of MFS
  Utilities Series:

We have audited the accompanying statement of assets and liabilities, including
the portfolio of investments, of MFS Utilities Series (the Series) (one of the
series constituting MFS Variable Insurance Trust) as of December 31, 1996, the
related statement of operations for the year then ended, the statements of
changes in net assets and financial highlights for the year then ended and for
the period from January 3, 1995 (commencement of investment operations) to
December 31, 1995. These financial statements and financial highlights are the
responsibility of the Series' management. Our responsibility is to express an
opinion on these financial statements and financial highlights based on our
audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of the securities owned at
December 31, 1996 by correspondence with the custodian and brokers; where
replies were not received from brokers, we performed other auditing procedures.
An audit also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of MFS Utilities Series
at December 31, 1996, the results of its operations, the changes in its net
assets, and its financial highlights for the respective stated periods in
conformity with generally accepted accounting principles.


DELOITTE & TOUCHE LLP

Boston, Massachusetts
February 7, 1997








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

This report is prepared for the general information of shareholders. It is
authorized for distribution to prospective investors only when preceded or
accompanied by a current prospectus.
<PAGE>



























































                                                                    VUF-2/97 11M




<PAGE>

                                                               Annual Report
[logo]                                                         for Year Ended
INVESTMENT MANAGEMENT                                          December 31, 1996




MFS(R) HIGH INCOME SERIES
A Series of MFS(R) Variable Insurance Trust


[Graphic Omitted]



<PAGE>

<TABLE>
MFS(R) HIGH INCOME SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST
<S>                                                                 <C>

TRUSTEES                                                            INVESTMENT ADVISER
A. Keith Brodkin*                                                   Massachusetts Financial Services Company
Chairman and President                                              500 Boylston Street
                                                                    Boston, MA 02116-3741
Nelson J. Darling, Jr.
Trustee, Eastern Enterprises                                        DISTRIBUTOR
(diversified holding company)                                       MFS Fund Distributors, Inc.
                                                                    500 Boylston Street
William R. Gutow                                                    Boston, MA 02116-3741
Vice Chairman,
Capitol Entertainment Management Company                            SHAREHOLDER SERVICE CENTER
(Blockbuster Video Franchise)                                       MFS Service Center, Inc.
                                                                    P.O. Box 1400
PORTFOLIO MANAGER                                                   Boston, MA 02107-9906
Joan S. Batchelder*
                                                                    For additional information,
TREASURER                                                           contact your financial adviser.
W. Thomas London*
                                                                    CUSTODIAN
ASSISTANT TREASURER                                                 Investors Bank & Trust Company
James O. Yost*
                                                                    AUDITORS
SECRETARY                                                           Deloitte & Touche LLP
Stephen E. Cavan*
                                                                    WORLD WIDE WEB
ASSISTANT SECRETARY                                                 www.mfs.com
James R. Bordewick, Jr.*

*Affiliated with the Investment Adviser
</TABLE>

<PAGE>

Dear Contract Owner:

The pattern of slow but sustainable growth seen in most of the world in 1996
seems likely to continue in 1997. While it looks like U.S. growth in 1997 will
slow modestly relative to 1996, there is evidence that Europe and, to a lesser
degree, Japan are continuing their recoveries from recession. At the same time,
companies in many emerging markets are reporting robust increases in earnings as
these markets benefit from higher-than-average economic growth and market
reforms, which should continue to provide more opportunities for development and
trade.

    After more than six years of expansion, the U.S. economy appears headed
toward another year of moderate growth in 1997, although a few signs point to
the possibility of a modest rise in inflation during the year. On the positive
side, the pattern of moderate growth and inflation set over the past few years
now seems fairly well entrenched in the economy and, short of a major
international or domestic crisis, appears to have enough momentum to remain on
track for some time. Also, recent gains in such important sectors as housing,
automobiles, industrial production, and exports indicate a fair amount of
underlying strength in the economy. However, some reason for caution can be seen
in the continuing high level of consumer debt and the attendant rise in personal
bankruptcies, as well as in the modestly disappointing levels of holiday sales.
Furthermore, the ongoing tightness in labor markets, and price rises in such
important sectors as energy, could add some inflationary pressures to the
economy. Given these somewhat conflicting indicators, we expect real
(inflation-adjusted) growth to revolve around 2% in 1997, which would represent
a modest decline from 1996.

    We continue to urge U.S. equity investors to lower their expectations for
1997 and to point out that the impressive gains of the past two years are not
sustainable. Just as the slowdown in corporate earnings growth and increases in
interest rates in 1996 raised some near-term concerns, further interest rate
increases and an acceleration of inflation could negatively affect the stock
market in 1997. However, to the extent that some slowdown in earnings means that
the economy is not overheating, this may be beneficial for the equity market in
the long run. Also, we believe many of the technology-driven productivity gains
that U.S. companies have made in recent years will continue to enhance corporate
America's competitiveness and profitability. Therefore, while we have some
near-term concerns, we remain reasonably positive about the long-term viability
of the equity market.

    In U.S. bond markets, conflicting signals over the strength of the economy
have created near-term volatility. Even comments by Federal Reserve Board
Chairman Alan Greenspan in late 1996 created some uncertainty over the Federal
Reserve's next move. We expect the Fed to maintain its anti-inflationary stance
should signs of more rapid economic growth and, particularly, higher inflation
resurface. While inflationary forces largely remained in check in 1996, the
continued strength in the labor market and rising energy prices mean that a
pickup in inflation is still possible. At the same time, the U.S. budget deficit
continues to decline and, as a percentage of gross domestic product, is now less
than 2%, which we consider a positive development for the bond markets. Although
interest rates may move higher over the coming months, we believe that, at
current levels, fixed-income markets remain equitably valued.

    Internationally, the environment of moderate growth, benign inflation, and
fairly steady interest rates is also providing support for investment markets
and should help support valuation levels in the coming year. Throughout the
world, the key to stock market performance in 1997 will be corporate earnings
growth. While U.S. earnings growth is slowing but still expected to be fairly
healthy, we anticipate that a number of European countries will see an
acceleration in earnings growth and improved valuations in 1997. Despite this
environment, many European countries trade at discounts to the United States. In
particular, we see opportunities in some of the multinationals and businesses
with the ability to generate steady earnings growth. In Japan, a recovery
appears to be taking place, but at a very modest rate, with valuations still at
high levels. In the emerging markets, the long-term economic growth story
remains intact and, although selectivity is even more important in these
markets, more companies are benefiting from this growth and trading at
below-average global valuations.

    Comments from the portfolio manager of the Series are presented below. We
appreciate your support and welcome any questions or comments you may have.

Respectfully,

/s/ A. Keith Brodkin                  /s/ Joan S. Batchelder
    A. Keith Brodkin                      Joan S. Batchelder
    Chairman and President                Portfolio Manager

January 9, 1997

MFS(R) HIGH INCOME SERIES

For the 12 months ended December 31, 1996, the Series provided a total return of
11.80%. Our investment strategy is to seek companies which have improving credit
quality and whose high-yield bonds offer attractive expected returns. We look
for companies we regard as having successful management teams, leadership
positions within their industries, consistent operating results, and reasonable
leverage.

    The high-yield market was the best-performing fixed-income market in 1996.
The economy was stronger than generally forecast, and most issuers fared well.
Favorable technical factors reinforced these positive fundamentals. Continued
inflows into high-yield mutual funds and increased purchases by crossover
buyers, insurance companies, and pension plan sponsors all fueled demand for
these securities. These favorable credit and technical factors caused the yield
spread between high-yield and Treasury securities to narrow from 4.25 percentage
points a year ago to 3.25 percentage points presently. (Principal value and
interest on Treasury securities are guaranteed by the U.S. government if held to
maturity.)

    The Series' portfolio is overweighted in issues in the consumer products,
general industrial, and telecommunications sectors. We have emphasized companies
where we think credit quality will improve primarily due to either good growth
potential (such as Revlon or Sprint Spectrum), or from being able to generate
enough free cash flow to pay down debt (such as many of our industrial
holdings). We have concentrated our holdings in the bonds of better-quality
companies as we do not think investors are adequately compensated for the risk
of lower-tier credits.

    The high-yield market's yield premium to Treasuries of 3.25 percentage
points is near the narrow end of its historic range. However, we do not
anticipate a downturn in the economy this year and, therefore, we believe that
this 50% premium to yields available on Treasury securities is adequate
compensation for the credit risk in today's market.

PORTFOLIO MANAGER'S PROFILE

Joan S. Batchelder is head of the MFS Fixed Income High Yield Department and has
managed High Income Series since its inception in 1995. She first joined MFS in
1978 as an investment officer and was appointed Assistant Vice President -
Investments in 1979, Vice President - Investments in 1980, and Senior Vice
President in 1983. Ms. Batchelder is a graduate of Colorado College and also
received a master's degree from the Maxwell School of Syracuse University. She
is a Chartered Financial Analyst, a Director of the Boston Bond Analysts
Society, a member of the Boston Securities Analyst Society, and a member of the
Boston Economics Club.

<PAGE>

PERFORMANCE SUMMARY

The information below illustrates the historical performance of MFS High Income
Series shares in comparison to various market indicators. Benchmark comparisons
are unmanaged and do not reflect any fees or expenses. You cannot invest in an
index.

GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT 
(For the Period from August 1, 1995 to December 31, 1996)

                 MFS                 Consumer         Lipper High Yield
          High Income Series    Price Index - U.S.     Bond Fund Index
          ------------------    ------------------     ---------------
 8/95         $10,000                $10,000               $10,000
12/95          10,525                 10,059                10,418
 3/96          10,658                 10,198                10,684
 6/96          10,831                 10,272                10,856
 9/96          11,435                 10,348                11,359
12/96          11,767                 10,420                11,736


AVERAGE ANNUAL TOTAL RETURN AS OF DECEMBER 31, 1996
                                                          1 Year        Life+
- --------------------------------------------------------------------------------
MFS High Income Series                                   +11.80%     +12.00%
- --------------------------------------------------------------------------------
Lipper High Yield Bond Fund Index**                      +12.66%     +11.97%
- --------------------------------------------------------------------------------
Consumer Price Index*                                    + 3.56%     + 2.91%
- --------------------------------------------------------------------------------
 +For the period from the commencement of investment operations, July 26, 1995
  to December 31, 1996.
 *The Consumer Price Index is a popular measure of change in prices.
**Source: Lipper Analytical Services.

Returns shown do not reflect the deduction of the mortality and expense risk
charges and administration fees. Please refer to the product's annual report for
performance that reflects the fees and charges imposed by insurance company
separate accounts.

Investment return and principal value will fluctuate, and shares, when redeemed,
may be worth more or less than their original cost. Past performance is no
guarantee of future results.

Series results reflect any applicable expense subsidies and waivers, without
which the performance results would have been less favorable. Subsidies and
waivers may be rescinded at any time. See the prospectus for details.

<PAGE>

PORTFOLIO OF INVESTMENTS - December 31, 1996

Bonds - 89.2%
- -----------------------------------------------------------------------------
                                                Principal Amount
Issuer                                             (000 Omitted)        Value
- -----------------------------------------------------------------------------
U.S. Bonds - 82.6%
  Aerospace - 0.8%
    BE Aerospace, 9.875s, 2006                            $  100  $   105,000
- -----------------------------------------------------------------------------
  Airlines - 2.9%
    Airplanes Pass-Through Trust (GPA Group
      Lease), 10.875s, 2019                               $   75  $    82,730
    K & F Industries, 10.375s, 2004                          250      262,500
    MOOG, Inc., 10s, 2006                                     25       26,250
                                                                  -----------
                                                                  $   371,480
- -----------------------------------------------------------------------------
  Automotive - 1.8%
    Harvard Industries, Inc., 11.125s, 2005               $   50  $    41,500
    Hayes Wheels International, Inc., 11s,
      2006                                                   100      109,125
    Lear Corp., 9.5s, 2006                                    75       80,437
                                                                  -----------
                                                                  $   231,062
- -----------------------------------------------------------------------------
  Building - 6.2%
    American Standard Cos., Inc., 0s to 1998,
      10.5s to 2005                                       $   75  $    69,750
    Building Materials Corp., 0s to 1999,
      11.75s to 2004                                         361      312,265
    Building Materials Corp., 8.625s, 2006##                  10        9,875
    Nortek, Inc., 9.875s, 2004                               225      227,250
    Schuller International Group, Inc.,
      10.875s, 2004                                           50       55,625
    USG Corp., 9.25s, 2001                                   125      133,125
                                                                  -----------
                                                                  $   807,890
- -----------------------------------------------------------------------------
  Chemicals - 1.0%
    NL Industries, Inc., 11.75s, 2003                     $   25  $    26,500
    UCC Investors Holdings, Inc., 10.5s, 2002                100      109,000
                                                                  -----------
                                                                  $   135,500
- -----------------------------------------------------------------------------
  Consumer Goods and Services - 8.1%
    E & S Holdings Corp., 10.375s, 2006##                 $  250  $   261,875
    Genmar Holdings, 13.5s, 2001                              40       38,800
    Iron Mountain, Inc., 10.125s, 2006                       200      211,250
    Pierce Leahy Corp., 11.125s, 2006                         75       81,937
    Reeves Industries, Inc., 11s, 2002                        50       47,750
    Revlon Worldwide Corp., 0s, 1998                         200      172,000
    Westpoint Stevens, Inc., 9.375s, 2005                    225      231,750
                                                                  -----------
                                                                  $ 1,045,362
- -----------------------------------------------------------------------------
  Containers - 5.7%
    Atlantis Group, Inc., 11s, 2003                       $   70  $    71,050
    Calmar, Inc., 11.5s, 2005                                100      103,500
    Gaylord Container Corp., 12.75s, 2005                    160      176,800
    Ivex Packaging Corp., 12.5s, 2002                         50       54,125
    Owens-Illinois, Inc., 11s, 2003                          250      278,125
    Plastic Containers, Inc., 10s, 2006##                     50       51,500
                                                                  -----------
                                                                  $   735,100
- -----------------------------------------------------------------------------
  Defense Electronics - 0.2%
    Alliant Techsystems, Inc., 11.75s, 2003               $   25  $    28,062
- -------------------------------------------------------------------------------
  Electronics - 0.4%
    Clark-Schwebel, Inc., 10.5s, 2006                     $   50  $    53,000
- -------------------------------------------------------------------------------
  Entertainment - 0.5%
    American Skiing Corp., 12s, 2006##                    $   25  $    26,313
    Marvel Holdings, Inc., 0s, 1998**                        265       39,750
                                                                  -----------
                                                                  $    66,063
- -----------------------------------------------------------------------------
  Food and Beverage Products - 4.3%
    Delta Beverage Group, 9.75s, 2003##                   $   60  $    61,500
    Foodbrands America, Inc., 10.75s, 2006                   150      157,500
    Keebler Corp., 10.75s, 2006##                            100      109,250
    PMI Acquisition Corp., 10.25s, 2003                      220      226,600
                                                                  -----------
                                                                  $   554,850
- -----------------------------------------------------------------------------
  Forest and Paper Products - 1.6%
    Pacific Lumber Co., 10.5s, 2003                       $   75  $    76,125
    U.S. Can Corp., 10.125s, 2006##                          125      130,938
                                                                  -----------
                                                                  $   207,063
- -----------------------------------------------------------------------------
  Machinery - 2.0%
    AGCO Corp., 8.5s, 2006                                $   50  $    51,375
    Motors & Gears, Inc., 10.75s, 2006##                     200      206,000
                                                                  -----------
                                                                  $   257,375
- -----------------------------------------------------------------------------
  Medical and Health Products - 0.4%
    Quest Diagnostic, Inc., 10.75s, 2006                  $   50  $    52,625
- -----------------------------------------------------------------------------
  Medical and Health Technology and Services - 2.0%
    Quorum Health Group, Inc., 8.75s, 2005                $  100  $   102,500
    Tenet Healthcare Corp., 10.125s, 2005                    125      138,437
    Unilab Corp., 11s, 2006                                   25       16,875
                                                                  -----------
                                                                  $   257,812
- -----------------------------------------------------------------------------
  Metals and Minerals - 1.8%
    Haynes International, Inc., 11.625s, 2004             $  200  $   211,000
    Kaiser Aluminum & Chemical Corp., 12.75s, 2003            25       26,875
                                                                  -----------
                                                                  $   237,875
- -----------------------------------------------------------------------------
  Oil Services - 1.4%
    Falcon Drilling Co., 8.875s, 2003                     $   25  $    25,500
    Mesa Operating Co., 10.625s, 2006                        125      135,625
    Noble Drilling Corp., 9.125s, 2006                        25       26,875
                                                                  -----------
                                                                  $   188,000
- -----------------------------------------------------------------------------
  Printing and Publishing - 0.6%
    Day International Group, Inc., 11.125s, 2005          $   50  $    51,938
    Golden Books Publishing, Inc., 7.65s, 2002                25       22,375
                                                                  -----------
                                                                  $    74,313
- -----------------------------------------------------------------------------
  Restaurants and Lodging - 4.4%
    Aztar Corp., 11s, 2002                                $   25  $    24,187
    Boomtown, Inc., 11.5s, 2003                               25       26,312
    Coast Hotels & Casino, 13s, 2002                          25       27,594
    Eldorado Resorts, 10.5s, 2006##                          100      105,750
    Grand Casinos, Inc., 10.125s, 2003                       150      150,750
    Griffin Gaming & Entertainment, 8.15s, 2000               50       49,000
    Harvey Casinos Resorts, 10.625s, 2006                     75       80,250
    Red Roof Inns, Inc., 9.625s, 2003                         70       70,000
    Santa Fe Hotel, Inc., 11s, 2000                           45       33,075
                                                                  -----------
                                                                  $   566,918
- -----------------------------------------------------------------------------
  Special Products and Services - 14.4%
    AAF-McQuay, Inc., 8.875s, 2003                        $   25  $    25,063
    Buckeye Cellulose Corp., 8.5s, 2005                       40       40,100
    Fairfield Manufacturing, 11.375s, 2001                    75       78,375
    Howmet Corp., 10s, 2003                                  125      135,938
    IMO Industries, Inc., 11.75s, 2006                       245      225,400
    Idex Corp., 9.75s, 2002                                   25       26,125
    Interlake Corp., 12s, 2001                                50       53,500
    Interlake Corp., 12.125s, 2002                           175      181,125
    International Knife & Saw, 11.375s, 2006##               100      103,750
    Mettler-Toledo, Inc., 9.75s, 2006                        150      157,500
    Polymer Group, Inc., 12.25s, 2002                        212      231,610
    Synthetic Industries, Inc., 12.75s, 2002                 395      435,488
    Thermadyne Holdings Corp., 10.25s, 2002                  150      153,750
    Thermadyne Holdings Corp., 10.75s, 2003                   26       26,780
                                                                  -----------
                                                                  $ 1,874,504
- -----------------------------------------------------------------------------
  Steel - 4.3%
    AK Steel Corp., 9.125s, 2006##                        $   50  $    51,000
    Carbide/Graphite Group, Inc., 11.5s, 2003                 25       27,125
    Jorgensen, (Earle M.) Co., 10.75s, 2000                   70       71,400
    Kaiser Aluminum & Chemical Corp., 
      9.875s, 2002                                            25       25,625
    WCI Steel, Inc., 10s, 2004##                             375      380,625
                                                                  -----------
                                                                  $   555,775
- -----------------------------------------------------------------------------
  Stores - 2.1%
    Finlay Enterprises, Inc., 0s to 1998, 12s to 2005     $  275  $   235,125
    Parisian, Inc., 9.875s, 2003                              38       38,380
                                                                  -----------
                                                                  $   273,505
- -----------------------------------------------------------------------------
  Supermarkets - 2.9%
    Dominick's Finer Foods, Inc., 10.875s, 2005           $   50  $    55,375
    Fleming Cos., Inc., 10.625s, 2001                         10       10,150
    Grand Union Co., 12s, 2004                                75       79,125
    Jitney-Jungle Stores, 12s, 2006                           30       31,725
    Pathmark Stores, Inc., 9.625s, 2003                       75       71,813
    Ralph's Grocery Co., 10.45s, 2004                         75       79,781
    Smith's Food & Drug Co., 11.25s, 2007                     50       55,250
                                                                  -----------
                                                                  $   383,219
- -----------------------------------------------------------------------------
  Telecommunications - 12.0%
    American Radio Systems Corp., 9s, 2006                $   50  $    49,000
    Charter Communications, 11.25s, 2006                      25       26,125
    Echostar Communications Corp., 0s to 1999,
      12.875s, 2004                                          100       75,500
    Echostar Communications Corp., 0s to 2000,
      13.125s, to 2004                                        50       41,375
    ICG Holdings, Inc., 0s to 2001, 12.5s 
      to 2006                                                 50       32,625
    Jones Intercable, Inc., 10.5s, 2008                      100      107,750
    K-III Communications Corp., 10.625s, 2002                 40       42,000
    Lenfest Communications, 10.5s, 2006                      100      105,000
    MFS Communications Co., Inc., 0s to 2001,
      8.875s to 2006                                         100       72,750
    Marcus Cable Operating Co., 0s to 1999,
      13.5s to 2004                                          200      164,000
    Mobile Telecom Technology Corp., 
      13.5s, 2002                                             25       25,000
    Mobilemedia Communications Corp., 0s to
      1998, 10.5s to 2003                                     40        8,400
    Mobilemedia Corp., 9.375s, 2007**                        100       27,000
    Paging Network, Inc., 8.875s, 2006                        50       47,625
    Park Broadcasting, Inc., 11.75s, 2004                    150      176,250
    Sprint Spectrum, 11s, 2006                               250      270,000
    Sygnet Wireless, Inc., 11.5s, 2006                       100      103,000
    Teleport Communications, 0s to 2001,
      11.125s to 2007                                        200      137,000
    Western Wireless Corp., 10.5s, 2007                       50       51,875
                                                                  -----------
                                                                  $ 1,562,275
- -----------------------------------------------------------------------------
  Transportation - 0.4%
    Moran Transportation Co., 11.75s, 2004                $   50  $    54,000
- -----------------------------------------------------------------------------
  Utilities - Electric - 0.4%
    El Paso Electric Co., 8.9s, 2006                      $   50  $    52,125
- -----------------------------------------------------------------------------
Total U.S. Bonds                                                  $10,730,753
- -----------------------------------------------------------------------------
Foreign Bonds - 6.6%
  Canada - 2.6%
    Algoma Steel, Inc., 12.375s, 2005 (Steel)   CAD           25  $    27,000
    CHC Helicopter Corp., 11.5s, 2002
      (Aerospace)                                             75       76,969
    Gulf Canada Resources Ltd., 9.25s, 2004
      (Oils)                                                  90       95,175
    International Semi-Tech Microelectronics,
      Inc., 0s to 2000,
      11.5s to 2003 (Consumer Goods and
      Services)                                               50       32,250
    Rogers Cablesystems Ltd., 10.125s, 2012
      (Telecommunications)                                    50       51,875
    Rogers Cantel, Inc., 9.375s, 2008
      (Cellular Telephones)                                   50       52,500
                                                                  -----------
                                                                  $   335,769
- -----------------------------------------------------------------------------
  Luxembourg - 0.8%
    Millicom International Cellular
      Communications, 0s to 2001,
      13.5s, to 2006 (Cellular Telephones)      BEF          175  $   108,500
- -------------------------------------------------------------------------------
  United Kingdom - 3.2%
    Bell Cablemedia PLC, 0s to 2000, 11.875s,
      2005 (Telecommunications)                 GBP           50  $    40,125
    Colt Telecom Group, 0s to 1997, 12s to
      2006 (Telecommunications)                              500      297,500
    Diamond Cable Communications PLC, 0s to
      2005, 11.75s to 2005
      (Telecommunications)                                    10        7,200
    Newsquest Capital, 11s, 2006
      (Telecommunications)##                                  25       25,500
    Videotron Holdings PLC, 0s to 2005, 11s to
      2005 (Telecommunications)                               50       40,250
                                                                  -----------
                                                                  $   410,575
- -----------------------------------------------------------------------------
Total Foreign Bonds                                               $   854,844
- -----------------------------------------------------------------------------
Total Bonds (Identified Cost, $11,317,019)                        $11,585,597
- -----------------------------------------------------------------------------

Preferred Stocks - 3.0%
- -----------------------------------------------------------------------------
Issuer                                                    Shares        Value
- -----------------------------------------------------------------------------
  Cablevision Systems Corp., 11.125s, 2008,
    "L" (Telecommunications)                               1,623  $   141,599
  Renaissance Cosmetics, 14s (Consumer Goods
    and Services)+                                           100      101,000
  Supermarkets General Holdings Corp., $3.52
    Exch., 2007 (Supermarkets)*                            1,500       38,250
  Time-Warner, Inc., 10.25s, "K"
    (Entertainment)                                          104      112,840
- -----------------------------------------------------------------------------
Total Preferred Stocks (Identified Cost, $385,297)                $   393,689
- -----------------------------------------------------------------------------
Short-Term Obligations - 7.1%
- -----------------------------------------------------------------------------
                                                Principal Amount
                                                   (000 Omitted)
- -----------------------------------------------------------------------------
  Student Loan Marketing Assn., due 1/02/97,
    at Amortized Cost                                     $  920  $   919,680
- -----------------------------------------------------------------------------
Total Investments (Identified Cost, $12,621,996)                  $12,898,966
Other Assets, less Liabilities - 0.7%                                  95,157
- -----------------------------------------------------------------------------
Net Assets - 100.0%                                               $12,994,123
- -----------------------------------------------------------------------------
 *Non-income producing security.
**Non-income producing security - in default.
##SEC Rule 144A restriction.
 +Restricted security.

Abbreviations have been used throughout this report to indicate amounts shown in
currencies other than the U.S. dollar. A list of abbreviations is shown below.

BEF = Belgian Francs      CAD = Canadian Dollars      GBP = British Pounds

See notes to financial statements

<PAGE>

FINANCIAL STATEMENTS

Statement of Assets and Liabilities
- ------------------------------------------------------------------------------
December 31, 1996
- ------------------------------------------------------------------------------
Assets:
  Investments, at value (identified cost, $12,621,996)           $12,898,966
  Cash                                                                 9,008
  Receivable for Series shares sold                                   58,016
  Interest receivable                                                265,860
  Receivable from investment adviser                                  21,617
  Deferred organization expenses                                       6,556
  Other assets                                                            23
                                                                 -----------
      Total assets                                               $13,260,046
                                                                 -----------
Liabilities:
  Payable for Series shares reacquired                           $     3,202
  Payable for investments purchased                                  235,279
  Payable to affiliate for management fee                                764
  Accrued expenses and other liabilities                              26,678
                                                                 -----------
      Total liabilities                                          $   265,923
                                                                 -----------
Net assets                                                       $12,994,123
                                                                 ===========
Net assets consist of:
  Paid-in capital                                                $12,704,316
  Unrealized appreciation on investments                             276,970
  Accumulated net realized loss on investments                          (158)
  Accumulated undistributed net investment income                     12,995
                                                                 -----------
      Total                                                      $12,994,123
                                                                 ===========
Shares of beneficial interest outstanding                         1,195,325
                                                                  =========
Net asset value per share
  (net assets of $12,994,123 / 1,195,325 shares of beneficial
  interest outstanding)                                             $10.87
                                                                    ======

See notes to financial statements

<PAGE>

FINANCIAL STATEMENTS - continued

Statement of Operations
- -------------------------------------------------------------------------------
Year Ended December 31, 1996
- -------------------------------------------------------------------------------
Net investment income:
    Interest income                                                    $683,617
                                                                       --------
  Expenses -
    Management fee                                                     $ 56,169
    Trustees' compensation                                                2,033
    Shareholder servicing agent fee                                       2,591
    Auditing fees                                                        24,256
    Printing                                                             21,241
    Custodian fee                                                         6,576
    Amortization of organization expenses                                 1,842
    Legal fees                                                            1,402
    Miscellaneous                                                         4,788
                                                                       --------
      Total expenses                                                   $120,898
    Fees paid indirectly                                                   (714)
    Reduction of expenses by investment adviser                         (45,293)
                                                                       --------
      Net expenses                                                     $ 74,891
                                                                       --------
        Net investment income                                          $608,726
                                                                       --------
Realized and unrealized gain on investments:
  Realized gain (identified cost basis) on net investment
    transactions                                                       $116,891
                                                                       --------
  Change in unrealized appreciation on investments                     $248,395
                                                                       --------
    Net realized and unrealized gain on investments                    $365,286
                                                                       --------
      Increase in net assets from operations                           $974,012
                                                                       ========

See notes to financial statements

<PAGE>

FINANCIAL STATEMENTS - continued

Statements of Changes in Net Assets
- -------------------------------------------------------------------------------
                                               Year Ended          Period Ended
                                        December 31, 1996    December 31, 1995*
- -------------------------------------------------------------------------------
Increase (decrease) in net assets:
From operations -
  Net investment income                        $   608,726          $   43,562 
  Net realized gain (loss) on investments          116,891              (2,558)
  Net unrealized gain on investments               248,395              28,575 
                                               -----------          ---------- 
    Increase in net assets from operations     $   974,012          $   69,579 
                                               -----------          ---------- 
Distributions declared to shareholders -                                       
  From net investment income                   $  (596,086)         $  (43,207)
  From net realized gain on investments           (114,491)            --      
                                               -----------          ---------- 
      Total distributions declared to                                          
        shareholders                           $  (710,577)         $  (43,207)
                                               -----------          ---------- 
Series share (principal) transactions -                                        
  Net proceeds from sale of shares             $18,788,696          $2,003,297 
  Net asset value of shares issued to                                          
    shareholders in reinvestment of                                            
    distributions                                  710,575              43,207 
  Cost of shares reacquired                     (8,715,074)           (134,985)
                                               -----------          ---------- 
    Increase in net assets from Series                                         
      share transactions                       $10,784,197          $1,911,519 
                                               -----------          ---------- 
      Total increase in net assets             $11,047,632          $1,937,891 
Net assets:                                                                    
  At beginning of period                         1,946,491               8,600 
                                               -----------          ---------- 
                                                                               
  At end of period (including accumulated                                      
    undistributed net investment income of                                     
    $12,995 and  $355, respectively)           $12,994,123          $1,946,491 
                                               ===========          ========== 

*For the period from the commencement of investment operations, July 26, 1995
to December 31, 1995.

See notes to financial statements

<PAGE>

FINANCIAL STATEMENTS - continued

Financial Highlights
- -------------------------------------------------------------------------------
                                            Year Ended           Period Ended
                                     December 31, 1996     December 31, 1995*
- -------------------------------------------------------------------------------
Per share data (for a share
  outstanding throughout each period):
Net asset value - beginning of period          $ 10.29                $10.00  
                                               -------                ------  
Income from investment operations# -                                          
  Net investment income(S)                     $  0.89                $ 0.34  
  Net realized and unrealized gain on                                         
    investments                                   0.32                  0.18  
                                               -------                ------  
    Total from investment operations           $  1.21                $ 0.52  
                                               -------                ------  
Less distributions declared to                                                
  shareholders -                                                              
  From net investment income                   $ (0.53)               $(0.23) 
  From net realized gain on investments          (0.10)                -      
                                               -------                ------  
    Total distributions declared to                                           
      shareholders                             $ (0.63)               $(0.23) 
                                               -------                ------  
Net asset value - end of period                $ 10.87                $10.29  
                                               =======                ======  
Total return                                    11.80%                 5.25%++
Ratios (to average net assets)
  /Supplemental data(S):
  Expenses                                       1.00%                 1.00%+ 
  Net investment income                          8.18%                 8.17%+ 
Portfolio turnover                                135%                   32%  
Net assets at end of period                                                   
  (000 omitted)                                $12,994                $1,946  
                                                                              
  * For the period from the commencement of investment operations, July 26, 1995
    to December 31, 1995.
  + Annualized.
 ++ Not annualized.
  # Per share data is based on average shares outstanding.
(S) The adviser voluntarily agreed to maintain the expenses of the Series at not
    more than 1.00% of average daily net assets. To the extent actual expenses
    were over these limitations, the net investment income per share and the
    ratios would have been:
  Net investment income                        $ 0.82                 $ 0.20  
  Ratios (to average net assets):                                             
    Expenses                                    1.62%                  4.38%+ 
    Net investment income                       7.56%                  4.82%+ 

See notes to financial statements
<PAGE>

NOTES TO FINANCIAL STATEMENTS
(1) Business and Organization
MFS High Income Series (the Series) is a diversified series of MFS Variable
Insurance Trust (the Trust) which is comprised of the following 12 series: MFS
Bond Series, MFS Emerging Growth Series, MFS Growth with Income Series, MFS High
Income Series, MFS Limited Maturity Series, MFS Money Market Series, MFS
Research Series, MFS Strategic Fixed Income Series, MFS Total Return Series, MFS
Utilities Series, MFS Value Series and MFS World Governments Series. The Trust
is organized as a Massachusetts business trust and is registered under the
Investment Company Act of 1940, as amended, as an open-end management investment
company.

The shareholders of each Series of the Trust are separate accounts of insurance
companies which offer variable annuity and/or life insurance products. As of
December 31, 1996 there were 11 shareholders in the Series. 

(2) Significant Accounting Policies 
General - The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.

Investment Valuations - Debt securities (other than short-term obligations which
mature in 60 days or less), including listed issues, are valued on the basis of
valuations furnished by dealers or by a pricing service with consideration to
factors such as institutional-size trading in similar groups of securities,
yield, quality, coupon rate, maturity, type of issue, trading characteristics
and other market data, without exclusive reliance upon exchange or
over-the-counter prices. Short-term obligations, which mature in 60 days or
less, are valued at amortized cost, which approximates market value. Equity
securities listed on securities exchanges or reported through the NASDAQ system
are valued at last sale prices. Unlisted equity securities or listed equity
securities for which last sale prices are not available are valued at last
quoted bid prices. Securities for which there are no such quotations or
valuations are valued at fair value as determined in good faith by or at the
direction of the Trustees.

Foreign Currency Translation - Investment valuations, other assets, and
liabilities initially expressed in foreign currencies are converted each
business day into U.S. dollars based upon current exchange rates. Purchases and
sales of foreign investments, income and expenses are converted into U.S.
dollars based upon currency exchange rates prevailing on the respective dates of
such transactions. Gains and losses attributable to foreign currency exchange
rates on sales of securities are recorded for financial statement purposes as
net realized gains and losses on investments. Gains and losses attributable to
foreign exchange rate movements on income and expenses are recorded for
financial statement purposes as foreign currency transaction gains and losses.
That portion of both realized and unrealized gains and losses on investments
that result from fluctuations in foreign currency exchange rates is not
separately disclosed.

Deferred Organization Expenses - Costs incurred by the Series in connection with
its organization have been deferred and are being amortized on a straight-line
basis over a five-year period beginning on the date of commencement of Series
operations.

Investment Transactions and Income - Investment transactions are recorded on the
trade date. Interest income is recorded on the accrual basis. All premium and
original issue discount are amortized or accreted for financial statement and
tax reporting purposes as required by federal income tax regulations. Interest
payments received in additional securities are recorded on the ex-dividend or
ex-interest date in an amount equal to the value of the security on such date.

The Series can invest up to 100% of its portfolio in high-yield securities rated
below investment grade. Investments in high-yield securities involve greater
degrees of credit and market risk than investments in higher-rated securities,
and tend to be more sensitive to economic conditions.

Fees Paid Indirectly - The Series' custodian bank calculates its fee based on
the Series' average daily net assets. This fee is reduced according to an
expense offset arrangement with State Street Bank, the dividend disbursing
agent, which provides for partial reimbursement of custody fees based on a
formula developed to measure the value of cash deposited by the Series with the
custodian and with the dividend disbursing agent. This amount is shown as a
reduction of expenses on the Statement of Operations.

Tax Matters and Distributions - The Series' policy is to comply with the
provisions of the Internal Revenue Code (the Code) applicable to regulated
investment companies and to distribute to shareholders all of its taxable
income, including any net realized gain on investments. Accordingly, no
provision for federal income or excise tax is provided. The Series files a tax
return annually using tax accounting methods required under provisions of the
Code which may differ from generally accepted accounting principles, the basis
on which these financial statements are prepared. Accordingly, the amount of net
investment income and net realized gain reported on these financial statements
may differ from that reported on the Series' tax return and, consequently, the
character of distributions to shareholders reported in the financial highlights
may differ from that reported to shareholders on Form 1099-DIV. Foreign taxes
have been provided for on interest and dividend income earned on foreign
investments in accordance with the applicable country's tax rates and to the
extent unrecoverable are recorded as a reduction of investment income. The
Series expects to pass through to shareholders foreign income taxes paid. The
election increases the taxable distributions of the Series by the amount of
foreign taxes paid. An individual shareholder who itemizes deductions, or a
corporate shareholder, will be able to claim an offsetting deduction or tax
credit (but not both) on their federal income tax returns. Individuals who do
not itemize deductions may claim a foreign tax credit but not a deduction. The
foreign source income is considered passive income for the purpose of computing
the foreign tax credit limitations. Distributions to shareholders are recorded
on the ex-dividend date.

The Series distinguishes between distributions on a tax basis and a financial
reporting basis and requires that only distributions in excess of tax basis
earnings and profits are reported in the financial statements as a tax return of
capital. Differences in the recognition or classification of income between the
financial statements and tax earnings and profits which result in temporary
over-distributions for financial statement purposes, are classified as
distributions in excess of net investment income or accumulated net realized
gains.

(3) Transactions with Affiliates
Investment Adviser - The Series has an investment advisory agreement with
Massachusetts Financial Services Company (MFS) to provide overall investment
advisory and administrative services, and general office facilities. The
management fee is computed daily and paid monthly at an annual rate of 0.75% of
average daily net assets. Under a temporary expense limitation agreement with
MFS, MFS has voluntarily agreed to pay all of the Series' operating expenses,
exclusive of management fees, which exceed 0.25% of the Series' average daily
net assets. The Series in turn will pay MFS an expense reimbursement fee not
greater than 0.25% of the Series' average daily net assets. To the extent that
the expense reimbursement fee exceeds the Series' actual expenses, the excess
will be applied to amounts paid by MFS in prior years. At December 31, 1996, the
aggregate unreimbursed expenses owed to MFS by the Series amounted to $63,140,
including $45,293 incurred in the current year.

The Series pays no compensation directly to its Trustees who are officers of the
investment adviser, or to officers of the Series, all of whom receive
remuneration for their services to the Series from MFS. Certain officers and
Trustees of the Series are officers or directors of MFS and MFS Service Center,
Inc. (MFSC).

Shareholder Servicing Agent - MFSC, a wholly owned subsidiary of MFS, earns a
fee for its services as shareholder servicing agent. The fee is calculated as a
percentage of the average daily net assets at an effective annual rate of up to
0.035%.

(4) Portfolio Securities
Purchases and sales of investments, other than purchased option transactions and
short-term obligations were as follows:

                                                         Purchases        Sales
- -------------------------------------------------------------------------------
U.S. government securities                             $   121,784  $   120,726
                                                       ===========  ===========
Investments (non-U.S. government securities)           $18,931,803  $ 9,235,031
                                                       ===========  ===========
The cost and unrealized appreciation or depreciation in value of the investments
owned by the Series, as computed on a federal income tax basis, are as follows:

Aggregate cost                                                      $12,621,966
                                                                    ===========
Gross unrealized appreciation                                       $   518,789
Gross unrealized depreciation                                          (241,819)
                                                                    -----------
  Net unrealized appreciation                                       $   276,970
                                                                    ===========

(5) Shares of Beneficial Interest
The Series' Declaration of Trust permits the Trustees to issue an unlimited
number of full and fractional shares of beneficial interest (without par value).
Transactions in Series shares were as follows:

<TABLE>
<CAPTION>
                                             Year Ended                Period Ended
                                             December 31, 1996         December 31, 1995*
                                             -----------------------   ---------------------
                                                Shares        Amount    Shares        Amount
- --------------------------------------------------------------------------------------------
<S>                                          <C>         <C>           <C>       <C>       
Shares sold                                  1,753,000   $18,788,696   197,072   $2,003,297
Shares issued to shareholders in
 reinvestment of distributions                  65,370       710,575     4,211       43,207
Shares reacquired                             (812,190)   (8,715,074)  (12,998)    (134,985)
                                             ---------   -----------   -------   ----------
  Net increase                               1,006,180   $10,784,197   188,285   $1,911,519
                                             =========   ===========   =======   ==========
</TABLE>

*For the period from the commencement of investment operations, July 26, 1995 to
December 31, 1995.

(6) Line of Credit
The Series entered into an agreement which enables it to participate with other
funds managed by MFS in an unsecured line of credit with a bank which permits
borrowings up to $350 million, collectively. Borrowings may be made to
temporarily finance the repurchase of Series shares. Interest is charged to each
fund, based on its borrowings, at a rate equal to the bank's base rate. In
addition, a commitment fee, based on the average daily unused portion of the
line of credit, is allocated among the participating funds at the end of each
quarter. The commitment fee allocated to the Series for the year ended December
31, 1996 was $99.

(7) Restricted Securities
The Series may invest not more than 15% of its net assets in securities which
are subject to legal or contractual restrictions on resale. At December 31,
1996, the Series owned the following restricted security (constituting 0.8% of
net assets) which may not be publicly sold without registration under the
Securities Act of 1933 (the 1933 Act). The Series does not have the right to
demand that such security be registered. The value of this security is
determined by valuations supplied by a pricing service or brokers or, if not
available, in good faith by or at the direction of the Trustees.

                                   Date of
Description                        Acquisition    Shares     Cost       Value
- --------------------------------------------------------------------------------
Renaissance Cosmetics, 14s         8/08/96        100        $100,000   $101,000
                                                                        ========
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Trustees of MFS Variable Insurance Trust and Shareholders of MFS High
Income Series:

We have audited the accompanying statement of assets and liabilities, including
the portfolio of investments, of MFS High Income Series (the Series) (one of the
series constituting MFS Variable Insurance Trust) as of December 31, 1996, the
related statement of operations for the year then ended, the statements of
changes in net assets and financial highlights for the year then ended and for
the period from July 26, 1995 (commencement of investment operations) to
December 31, 1995. These financial statements and financial highlights are the
responsibility of the Series' management. Our responsibility is to express an
opinion on these financial statements and financial highlights based on our
audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of the securities owned at
December 31, 1996 by correspondence with the custodian and brokers; where
replies were not received from brokers, we performed other auditing procedures.
An audit also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of MFS High Income
Series at December 31, 1996, the results of its operations, the changes in its
net assets, and its financial highlights for the respective stated periods in
conformity with generally accepted accounting principles.

DELOITTE & TOUCHE LLP

Boston, Massachusetts
February 7, 1997

                ---------------------------------------------
This report is prepared for the general information of shareholders. It is
authorized for distribution to prospective investors only when preceded or
accompanied by a current prospectus.

<PAGE>

























































                                                                     VHI-2/97 7M




<PAGE>

                                                               Annual Report
[Logo]                                                         for Year Ended
INVESTMENT MANAGEMENT                                          December 31, 1996



MFS(R) WORLD GOVERNMENTS SERIES
A Series of MFS(R) Variable Insurance Trust



[Graphic Omitted]


<PAGE>

MFS(R) WORLD GOVERNMENTS SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST

TRUSTEES                               INVESTMENT ADVISER
A. Keith Brodkin*                      Massachusetts Financial Services Company
Chairman and President                 500 Boylston Street
                                       Boston, MA 02116-3741
Nelson J. Darling, Jr.
Trustee, Eastern Enterprises           DISTRIBUTOR
(diversified holding company)          MFS Fund Distributors, Inc.
                                       500 Boylston Street
William R. Gutow                       Boston, MA 02116-3741
Vice Chairman,
Capitol Entertainment Management       SHAREHOLDER SERVICE CENTER
Company (Blockbuster Video Franchise)  MFS Service Center, Inc.
                                       P.O. Box 1400
PORTFOLIO MANAGER                      Boston, MA 02107-9906
Stephen C. Bryant*
                                       For additional information,
TREASURER                              contact your financial adviser.
W. Thomas London*
                                       CUSTODIAN
ASSISTANT TREASURER                    Investors Bank & Trust Company
James O. Yost*
                                       AUDITORS
SECRETARY                              Deloitte & Touche LLP
Stephen E. Cavan*
                                       WORLD WIDE WEB
ASSISTANT SECRETARY                    www.mfs.com
James R. Bordewick, Jr.*

*Affiliated with the Investment Adviser
<PAGE>
Dear Contract Owner:

The pattern of slow but sustainable growth seen in most of the world in 1996
seems likely to continue in 1997. While it looks like U.S. growth in 1997 will
slow modestly relative to 1996, there is evidence that Europe and, to a lesser
degree, Japan are continuing their recoveries from recession. At the same time,
companies in many emerging markets are reporting robust increases in earnings as
these markets benefit from higher-than-average economic growth and market
reforms, which should continue to provide more opportunities for development and
trade.

    After more than six years of expansion, the U.S. economy appears headed
toward another year of moderate growth in 1997, although a few signs point to
the possibility of a modest rise in inflation during the year. On the positive
side, the pattern of moderate growth and inflation set over the past few years
now seems fairly well entrenched in the economy and, short of a major
international or domestic crisis, appears to have enough momentum to remain on
track for some time. Recent gains in such important sectors as housing,
automobiles, industrial production, and exports indicate a fair amount of
underlying strength in the economy. However, some reason for caution can be seen
in the continuing high level of consumer debt and the attendant rise in personal
bankruptcies, as well as in the modestly disappointing levels of holiday sales.
Furthermore, the ongoing tightness in labor markets, and price rises in such
important sectors as energy, could add some inflationary pressures to the
economy. Given these somewhat conflicting indicators, we expect real
(inflation-adjusted) growth to revolve around 2% in 1997, which would represent
a modest decline from 1996.

    We continue to urge U.S. equity investors to lower their expectations for
1997 and to point out that the impressive gains of the past two years are not
sustainable. Just as the slowdown in corporate earnings growth and increases in
interest rates in 1996 raised some near-term concerns, further interest rate
increases and an acceleration of inflation could negatively affect the stock
market in 1997. However, to the extent that some slowdown in earnings means that
the economy is not overheating, this may be beneficial for the equity market in
the long run. Also, we believe many of the technology-driven productivity gains
that U.S. companies have made in recent years will continue to enhance corporate
America's competitiveness and profitability. Therefore, while we have some
near-term concerns, we remain reasonably positive about the long-term viability
of the equity market.

    In U.S. bond markets, conflicting signals over the strength of the economy
have created near-term volatility. Even comments by Federal Reserve Board
Chairman Alan Greenspan in late 1996 created some uncertainty over the Federal
Reserve's next move. We expect the Fed to maintain its anti-inflationary stance
should signs of more rapid economic growth and, particularly, higher inflation
resurface. While inflationary forces largely remained in check in 1996, the
continued strength in the labor market and rising energy prices mean that a
pickup in inflation is still possible. At the same time, the U.S. budget deficit
continues to decline and, as a percentage of gross domestic product, is now less
than 2%, which we consider a positive development for the bond markets. Although
interest rates may move higher over the coming months, we believe that, at
current levels, fixed-income markets remain equitably valued.

    Internationally, the environment of moderate growth, benign inflation, and
fairly steady interest rates is also providing support for investment markets
and should help support valuation levels in the coming year. Throughout the
world, the key to stock market performance in 1997 will be corporate earnings
growth. While U.S. earnings growth is slowing but still expected to be fairly
healthy, we anticipate that a number of European countries will see an
acceleration in earnings growth and improved valuations in 1997. Despite this
environment, many European countries trade at discounts to the United States. In
particular, we see opportunities in some of the multinationals and businesses
with the ability to generate steady earnings growth. In Japan, a recovery
appears to be taking place, but at a very modest rate, with valuations still at
high levels. In the emerging markets, the long-term economic growth story
remains intact and, although selectivity is even more important in these
markets, more companies are benefiting from this growth and trading at
below-average global valuations.

    Comments from the portfolio manager of the Series are presented below. We
appreciate your support and welcome any questions or comments you may have.

Respectfully,

/s/ A. Keith Brodkin                     /s/ Stephen C. Bryant
    A. Keith Brodkin                         Stephen C. Bryant
    Chairman and President                   Portfolio Manager

January 9, 1997

MFS WORLD GOVERNMENTS SERIES

As noted above, the first half of 1996 witnessed concerns about accelerating
U.S. growth and its potential resultant boost to other major economies, which
set off a rise in interest rates based on fears of higher inflation and
potential rate hikes by the Federal Reserve Board. However, in the second half,
these concerns proved unwarranted as the U.S. economy slowed, inflation fears
receded, and rates aggressively declined. During this second half, most central
banks, with the exception of the United States, lowered official interest rates.
In this environment, the Series provided a total return of 4.03% for the 12
months ended December 31, 1996. This compares to a 3.62% return for the Salomon
Brothers World Government Bond Index (the Salomon Index) for the same period.
The Salomon Index is unmanaged and consists of complete universes of government
bonds with remaining maturities of at least five years. The Fund's return also
compares to a 4.39% return for the J.P. Morgan Global Government Bond Index (the
Morgan Index) for the same period. The Morgan Index is an unmanaged aggregate of
actively traded government bonds issued from 13 countries (including the United
States) with maturities of at least one year. However, the Morgan Index is being
replaced with the Salomon Index as a benchmark because MFS believes this index
is more representative of the countries in which the Fund invests than the
Morgan Index.

    By the end of the year, all markets, as measured by the Salomon Index in
local currency returns, registered positive returns but with significant
differences. For example, the core markets -- United States, Japan, and Germany
- -- were the worst performers, while the higher-yielding markets of Australia,
Canada, Spain, and Italy were among the better performers. The Series benefited
by being overweighted in these higher-yielding markets for most of the year.

    In preparation for the monetary union due to commence in January 1999,
almost all European countries announced tight fiscal budgets, while at the same
time cutting interest rates due to slow growth and low inflation. Within Europe,
a dramatic narrowing of yield spread differentials, or outperformance, began in
earnest during the third quarter with Spain, Italy, and Sweden being the main
beneficiaries. Although a good part of this convergence has now taken place, we
anticipate these markets will continue to outperform as European monetary union
approaches.

    Meanwhile, looking at the dollar bloc, both Canadian and Australian markets
continue to benefit from low inflation, slow growth, and tight fiscal budgets.
The Series benefited by being overweighted in both these markets for most of the
year. Looking ahead, while there is yet no immediate threat of higher inflation
in Canada, economic growth is finally picking up and we expect the Bank of
Canada to be more accommodative in 1997. Although an underweighted position in
U.S. bonds has been beneficial in 1996, the Series' performance was hindered
during the third quarter as the U.S. position's duration (a measure of interest
rate sensitivity) was low in anticipation of a pickup in U.S. economic growth
that never materialized.

    Regarding the Japanese bond market, the Series was underweighted for most of
the year because we believed other markets offered better value. However, the
Japanese bond market was helped by continued depressed real estate and banking
sectors, as well as weak consumer spending. Our outlook calls for a continuation
of slow, choppy growth with a modest increase in inflation.

    For 1996, the overall rise in U.S. interest rates, coinciding with
reductions in short-term rates in Europe, enabled the dollar to appreciate
against the German mark. Additionally, the dollar benefited from yield
convergence within Europe. The dollar has continued to strengthen versus the
Japanese yen, based primarily on Japan's low interest rates and its government
policy of engineering a weaker currency in order to stimulate its beleaguered
economy. Looking forward, we anticipate modest but further lowering of interest
rates by central banks in many European countries as well as in Australia and
New Zealand, which we believe could continue to be positive for bonds. However,
some caution is warranted as ultimately lower rates in these countries could
result in a pickup in economic growth and, possibly, inflation. Moreover, with
the U.S. currency benefiting from positive interest rate differentials, renewed
hope for a balanced budget, and movement toward an inclusive, single European
currency, the prospects for a stable dollar remain favorable.

PORTFOLIO MANAGER'S PROFILE

Stephen C. Bryant joined Massachusetts Financial Services (MFS) in 1987 as
Assistant Vice President - Investments in the International Fixed Income
Department. He was named Vice President - Investments in 1989 and Senior Vice
President in 1993. Mr. Bryant is a graduate of Wesleyan University and has
managed MFS World Governments Series since its inception in June 1994.

PERFORMANCE SUMMARY

The information below illustrates the historical performance of MFS World
Governments Series shares in comparison to various market indicators. Benchmark
comparisons are unmanaged and do not reflect any fees or expenses.
You cannot invest in an index.

GROWTH OF A $10,000 HYPOTHETICAL INVESTMENT
(For the Period from June 1, 1994 to December 31, 1996)

                                    JP        Salomon 
            MFS       Consumer    Morgan      Brothers
            World     Price       Global        World  
         Governments  Index       Gov't        Gov't.
           Series      U.S.    Bond Index    Bond Index
         -----------  ------   ----------   ----------

 6/94      10000.0    10000.0    10000.0      10000.0
12/94      10078.0    10149.0    10284.0      10313.0
 6/95      11197.0    10339.0    11884.0      12051.0
12/95      11528.0    10400.0    12269.0      12276.0
 6/96      11720.0    10620.0    12127.0      12095.0
12/96      11993.0    10773.0    12808.0      12721.0


AVERAGE ANNUAL TOTAL RETURNS AS OF DECEMBER 31, 1996

                                                   1 Year       Life+
- ----------------------------------------------------------------------------
MFS World Governments Series                       +4.03%     +7.39%
- ----------------------------------------------------------------------------
Salomon Brothers World Government Bond Index**     +3.62%     +9.76%
- ----------------------------------------------------------------------------
JP Morgan Global Government Bond Index#            +4.39%     +9.74%
- ----------------------------------------------------------------------------
Consumer Price Index*++                            +3.56%     +2.96%
- ----------------------------------------------------------------------------
 +For the period from the commencement of investment operations, June
  14, 1994 to December 31, 1996. *The Consumer Price Index is a popular
  measure of change in prices.
++Source: CDA/Wiesenberger.
**Source: Lipper Analytical Services.
 #Source: Asset Investment Management (AIM).

Returns shown do not reflect the deduction of the mortality and expense risk
charges and administration fees. Please refer to the product's annual report for
performance that reflects the fees and charges imposed by insurance company
separate accounts.

Investment return and principal value will fluctuate, and shares, when redeemed,
may be worth more or less than their original cost. Past performance is no
guarantee of future results.

Series results reflect any applicable expense subsidies and waivers, without
which the performance results would have been less favorable. Subsidies and
waivers may be rescinded at any time. See the prospectus for details.

<PAGE>

PORTFOLIO OF INVESTMENTS - December 31, 1996

Bonds - 90.0%
- -----------------------------------------------------------------------------
                                                Principal Amount
Issuer                                             (000 Omitted)        Value
- -----------------------------------------------------------------------------
Foreign Bonds - 69.8%
  Australia - 11.1%
    Commonwealth of Australia,
      9.75s, 2002                     AUD                  2,050  $ 1,814,428
    Commonwealth of Australia,
      10s, 2002                                            1,200    1,079,250
                                                                  -----------
                                                                  $ 2,893,678
- -----------------------------------------------------------------------------
  Belgium - 1.4%
    Kingdom of Belgium, 8.75s, 2002   BEF                 10,000  $   371,989
- -----------------------------------------------------------------------------
  Canada - 2.6%
    Government of Canada, 9s, 2004    CAD                    400  $   342,494
    Government of Canada, 8.75s,
      2005                                                   400      339,575
                                                                  -----------
                                                                  $   682,069
- -----------------------------------------------------------------------------
  Denmark - 6.1%
    Kingdom of Denmark, 6s, 1999      DKK                  1,787  $   315,460
    Kingdom of Denmark, 9s, 2000                           5,850    1,131,553
    Kingdom of Denmark, 7s, 2007                             868      149,912
                                                                  -----------
                                                                  $ 1,596,925
- -----------------------------------------------------------------------------
  Germany - 12.5%
    Republic of Germany, 6.875s,
      1999                            DEM                    760  $   526,838
    Republic of Germany, 8.75s, 2000                       2,743    2,038,216
    Republic of Germany, 7.125s, 2002
                                                             970      691,956
                                                                  -----------
                                                                  $ 3,257,010
- -----------------------------------------------------------------------------
  Ireland - 7.9%
    Republic of Ireland, 6.5s, 2001   IEP                    450  $   774,817
    Republic of Ireland, 9.25s, 2003                         650    1,275,491
                                                                  -----------
                                                                  $ 2,050,308
- -----------------------------------------------------------------------------
  Italy - 8.0%
    Republic of Italy, 9.5s, 1999     ITL              1,315,000  $   923,900
    Republic of Italy, 9.5s, 2006                      1,535,000    1,145,904
                                                                  -----------
                                                                  $ 2,069,804
- -----------------------------------------------------------------------------
  Japan - 5.3%
    Export-Import Bank of Japan,
      4.375s, 2003                    JPY                 70,000  $   681,850
    IBRD-Global Bonds, 4.5s, 2000                         43,000      413,090
    World Bank Euro-Yen, 5.25s, 2002                      28,000      283,267
                                                                  -----------
                                                                  $ 1,378,207
- -----------------------------------------------------------------------------
  New Zealand - 2.6%
    Government of New Zealand, 8s,
      2004                            NZD                    900  $   662,874
- -----------------------------------------------------------------------------
  Spain - 6.8%
    Government of Spain, 8.4s, 2001   ESP                  3,400   $   28,628
    Government of Spain, 10.1s, 2001                     120,000    1,063,433
    Government of Spain, 7.9s, 2002                       82,000      674,462
                                                                  -----------
                                                                  $ 1,766,523
- -----------------------------------------------------------------------------
  Sweden - 2.0%
    Government of Sweden, 11s, 1999   SEK                  2,500  $   411,922
    Government of Sweden, 10.25s,
      2000                                                   600      101,555
                                                                  -----------
                                                                  $   513,477
- -----------------------------------------------------------------------------
  United Kingdom - 3.5%
    United Kingdom Gilts, 7s, 2001    GBP                    540  $   915,588
- -----------------------------------------------------------------------------
Total Foreign Bonds                                               $18,158,452
- -----------------------------------------------------------------------------

U.S. Bonds - 20.2%
  U.S. Treasury Notes, 6.25s, 2001                       $   400  $   400,376
  U.S. Treasury Notes, 6.625s, 2001                        1,625    1,650,904
  U.S. Treasury Notes, 6.25s, 2003                         3,200    3,196,000
- -----------------------------------------------------------------------------
Total U.S. Bonds                                                  $ 5,247,280
- -----------------------------------------------------------------------------
Total Bonds (Identified Cost, $23,413,386)                        $23,405,732
- -----------------------------------------------------------------------------
Call Options Purchased - 0.2%
- -----------------------------------------------------------------------------
                                                Principal Amount
Description/Expiration Month/Strike                 of Contracts
Price                                              (000 Omitted)
- -----------------------------------------------------------------------------
German Marks/Swiss Francs
  February/0.84                       DEM                  2,115   $   54,034
Italian Lire/German Marks
  January/995                         ITL              1,280,754        6,404
- -----------------------------------------------------------------------------
Total Call Options Purchased (Premiums Paid, $15,724)              $   60,438
- -----------------------------------------------------------------------------
Put Options Purchased - 1.6%
- -----------------------------------------------------------------------------
German Marks/British Pounds
  January/2.45                        DEM                  3,097  $   148,965
  January/2.51                                             3,173       99,693
  January/2.56                                             3,236       61,632
Swiss Francs/German Marks
  January/0.829                       CHF                  1,221       43,757
  February/0.84                                            1,237       31,624
  March/0.86                                               3,431       37,236
- -----------------------------------------------------------------------------
Total Put Options Purchased (Premiums Paid, $93,381)              $   422,907
- -----------------------------------------------------------------------------
Short-Term Obligations - 7.9%
- -----------------------------------------------------------------------------
                                                Principal Amount
Issuer                                             (000 Omitted)
- -----------------------------------------------------------------------------
  Federal Home Loan Bank, due 1/02/97                  $   1,380    1,379,597
  Federal Home Loan Mortgage Corp.,
    due 1/07/97                                              680      677,483
- -----------------------------------------------------------------------------
Total Short-Term Obligations, at Amortized Cost                   $ 2,057,080
- -----------------------------------------------------------------------------
Total Investments (Identified Cost, $25,579,571)                  $25,946,157
- -----------------------------------------------------------------------------
Call Options Written
- -----------------------------------------------------------------------------
                                                Principal Amount
Description/Expiration Month/Strike                 of Contracts
Price                                              (000 Omitted)
- -----------------------------------------------------------------------------
German Marks/British Pounds
  August/2.239                        DEM                  2,994      $     0
Swiss Francs/German Marks
  February/0.8265                     CHF                  2,081          (12)
- -----------------------------------------------------------------------------
Total Call Options Written (Premiums Received, $17,785)               $   (12)
- -----------------------------------------------------------------------------

Put Options Written - (1.4)%
- -----------------------------------------------------------------------------
                                                Principal Amount
Description/Expiration Month/Strike                 of Contracts
Price                                              (000 Omitted)        Value
- -------------------------------------------------------------------------------
German Marks/British Pounds
  January/2.3682                      DEM                  2,994  $         0
  January/2.45                                             3,097     (148,355)
  January/2.5105                                           3,173      (99,295)
Swiss Francs/German Marks
  January/0.829                       CHF                  1,221      (43,787)
  February/0.84                                            3,351      (85,696)
- -------------------------------------------------------------------------------
Total Put Options Written (Premiums Received, $153,765)           $  (377,133)
- -------------------------------------------------------------------------------
Other Assets, Less Liabilities - 1.7%                             $   453,941
- -------------------------------------------------------------------------------
Net Assets - 100.0%                                               $26,022,953
- -------------------------------------------------------------------------------

Abbreviations have been used throughout this report to indicate amounts shown in
currencies other than the U.S. dollar. A list of abbreviations is show below.

AUD          = Australian Dollars              GBP     = British Pounds
BEF          = Belgian Francs                  IEP     = Irish Punts
CAD          = Canadian Dollars                ITL     = Italian Lire
CHF          = Swiss Francs                    JPY     = Japanese Yen
DEM          = Deutsche Marks                  NLG     = Dutch Guilders
DKK          = Danish Kroner                   NOK     = Norwegian Krone
ECU          = European Currency Units         NZD     = New Zealand Dollars
ESP          = Spanish Pesetas                 SEK     = Swedish Kronor
FRF          = French Francs
See notes to financial statements

<PAGE>
FINANCIAL STATEMENTS

Statement of Assets and Liabilities
- ----------------------------------------------------------------------------
December 31, 1996
- ----------------------------------------------------------------------------
Assets:
  Investments, at value (identified cost, $25,579,571)           $25,946,157
  Cash                                                                36,029
  Net receivable for forward foreign currency exchange
    contracts sold                                                   233,881
  Net receivable for closed forward foreign currency exchange
    contracts                                                        385,985
  Receivable for Series shares sold                                  252,795
  Receivable for investments sold                                  2,427,988
  Interest receivable                                                596,957
  Receivable from investment adviser                                  68,518
  Deferred organization expenses                                       2,299
  Other assets                                                            80
                                                                 -----------
      Total assets                                               $29,950,689
                                                                 -----------
Liabilities:
  Payable for Series shares reacquired                           $   171,811
  Payable for investments purchased                                2,305,799
  Written options outstanding, at value (premiums received,
    $171,550)                                                        377,145
  Net payable for forward foreign currency exchange contracts
    purchased                                                      1,005,387
  Payable to affiliate for management fee                              1,589
  Accrued expenses and other liabilities                              66,005
                                                                 -----------
      Total liabilities                                          $ 3,927,736
                                                                 -----------
Net assets                                                       $26,022,953
                                                                 ===========
Net assets consist of:
  Paid-in capital                                                $25,151,769
  Unrealized depreciation on investments and translation of
    assets and liabilities in foreign currencies                    (227,087)
  Accumulated undistributed net realized gain on investments
    and foreign currency transactions                                221,999
  Accumulated undistributed net investment income                    876,272
                                                                 -----------
      Total                                                      $26,022,953
                                                                 ===========
Shares of beneficial interest outstanding                         2,459,773
                                                                  =========
Net asset value per share
  (net assets of $26,022,953 / 2,459,773 shares of beneficial
  interest outstanding)                                            $10.58
                                                                   ======
See notes to financial statements
<PAGE>

FINANCIAL STATEMENTS - continued

Statement of Operations
- ------------------------------------------------------------------------------
Year Ended December 31, 1996
- -----------------------------------------------------------------------------
Net investment income:                                 
    Interest income                                                $1,156,162 
                                                                   ---------- 
                                                                              
  Expenses -                                                                  
    Management fee                                                 $  126,898  
    Trustees' compensation                                              2,033  
    Shareholder servicing agent fee                                     5,869  
    Printing                                                           85,838  
    Auditing fees                                                      67,150  
    Custodian fee                                                      44,443  
    Amortization of organization expenses                               1,509  
    Legal fees                                                          1,196  
    Miscellaneous                                                       8,534  
                                                                   ---------- 
      Total expenses                                               $  343,470  
    Fees paid indirectly                                               (1,716) 
    Reduction of expenses by investment adviser                      (172,556) 
                                                                   ---------- 
      Net expenses                                                 $  169,198  
                                                                   ---------- 
        Net investment income                                      $  986,964  
                                                                   ---------- 
Realized and unrealized gain (loss) on investments:                           
  Realized gain (loss) (identified cost basis) -                              
    Investment transactions                                        $  642,196  
    Written option transactions                                        53,876  
    Foreign currency transactions                                    (588,976) 
                                                                   ---------- 
      Net realized gain on investments and foreign                            
        currency transactions                                      $  107,096  
                                                                   ---------- 
                                                                              
  Change in unrealized appreciation (depreciation) -                          
    Investments                                                    $  232,845  
    Written options                                                  (208,572) 
    Translation of assets and liabilities in foreign                          
      currencies                                                     (157,165) 
                                                                   ---------- 
      Net unrealized loss on investments and foreign                          
        currency translation                                       $ (132,892)
                                                                   ---------- 
        Net realized and unrealized loss on investments                       
          and foreign currency                                     $  (25,796) 
                                                                   ---------- 
          Increase in net assets from operations                   $  961,168  
                                                                   ==========  
See notes to financial statements                                  

<PAGE>

<TABLE>
FINANCIAL STATEMENTS - continued

Statements of Changes in Net Assets
- -------------------------------------------------------------------------------------------------------------
<CAPTION>
Year Ended December 31,                                                             1996               1995
- -------------------------------------------------------------------------------------------------------------
Increase (decrease) in net assets:
<S>                                                                          <C>                 <C>          
From operations -                                                                                            
  Net investment income                                                      $    986,964        $   272,353 
  Net realized gain on investments and foreign currency transactions              107,096            398,163 
  Net unrealized loss on investments and foreign currency translation            (132,892)           (80,131)
                                                                             ------------        ----------- 
    Increase in net assets from operations                                   $    961,168        $   590,385 
                                                                             ------------        ----------- 
Distributions declared to shareholders -                                                                     
  From net investment income                                                 $    --             $  (272,353)
  In excess of net investment income                                              --                (357,618)
  Tax return of capital                                                           --                 (63,028)
                                                                             ------------        ----------- 
    Total distributions declared to shareholders                             $    --             $  (692,999)
                                                                             ------------        ----------- 
Series share (principal) transactions -                                                                      
  Net proceeds from sale of shares                                           $ 33,174,815        $ 9,272,850 
  Net asset value of shares issued to shareholders in reinvestment
    of distributions                                                              --                 692,995 
  Cost of shares reacquired                                                   (15,536,671)        (5,320,839)
                                                                             ------------        ----------- 
    Increase in net assets from Series share transactions                    $ 17,638,144        $ 4,645,006 
                                                                             ------------        ----------- 
      Total increase in net assets                                           $ 18,599,312        $ 4,542,392 
                                                                                                             
Net assets:                                                                                                  
  At beginning of period                                                        7,423,641          2,881,249 
                                                                             ------------        ----------- 
  At end of period (including accumulated undistributed net                                                  
    investment income of $876,272 and $166,765, respectively)                $ 26,022,953        $ 7,423,641 
                                                                             ============        =========== 
</TABLE>                                                                     

See notes to financial statements


<PAGE>

<TABLE>
FINANCIAL STATEMENTS - continued

Financial Highlights
- ---------------------------------------------------------------------------------------------------------
<CAPTION>
                                                   Year Ended         Year Ended       Period Ended
                                                 December 31,       December 31,       December 31,
                                                         1996               1995               1994*
- ---------------------------------------------------------------------------------------------------------
Per share data (for a share outstanding
 throughout each period):
<S>                                                    <C>                <C>                <C>   
Net asset value - beginning of period                  $10.17             $ 9.82             $10.00
                                                       ------             ------             ------
Income from investment operations# -
  Net investment income(S)                             $ 0.60             $ 0.63             $ 0.17
  Net realized and unrealized gain (loss)
    on investments and foreign
    currency transactions                               (0.19)              0.78              (0.09)
                                                       ------             ------             ------
      Total from investment operations                 $ 0.41             $ 1.41             $ 0.08
                                                       ------             ------             ------

Less distributions declared to shareholders -
  From net investment income                           $ --               $(0.42)            $(0.17)
  In excess of net investment income                     --                (0.54)             (0.09)
  Tax return of capital                                  --                (0.10)              --
                                                       ------             ------             ------
      Total distributions declared to shareholders     $ --               $(1.06)            $(0.26)
                                                       ------             ------             ------
Net asset value - end of period                        $10.58             $10.17             $ 9.82
                                                       ======             ======             ======
Total return                                            4.03%             14.38%              0.79%++
Ratios (to average net assets)/Supplemental data(S):
  Expenses                                              1.00%              1.00%              1.00%+
  Net investment income                                 5.84%              6.05%              4.68%+
Portfolio turnover                                       361%               211%                62%
Net assets at end of period (000 omitted)             $26,023             $7,424             $2,881

  *For the period from the commencement of investment operations, June 14, 1994 to December 31, 1994.
  +Annualized.
 ++Not annualized.
  #Per share data is based on average shares outstanding.
(S)The adviser voluntarily agreed to maintain the expenses of the Series at not more than 1.00% of average 
   daily net assets. To the extent actual expenses were over these limitations, the net investment income
   per share and the ratios would have been:
 
 Net investment income                                $ 0.50             $ 0.53             $ 0.16
  Ratios (to average net assets):
    Expenses                                            2.03%              1.99%              1.10%+
    Net investment income                               4.81%              5.09%              4.58%+
</TABLE>

See notes to financial statements

<PAGE>
NOTES TO FINANCIAL STATEMENTS
(1) Business and Organization
MFS World Governments Series (the Series) is a non-diversified series of MFS
Variable Insurance Trust (the Trust) which is comprised of the following twelve
series: MFS Bond Series, MFS Emerging Growth Series, MFS Growth with Income
Series, MFS High Income Series, MFS Limited Maturity Series, MFS Money Market
Series, MFS Research Series, MFS Strategic Fixed Income Series, MFS Total Return
Series, MFS Utilities Series, MFS Value Series and MFS World Governments Series.
The Trust is organized as a Massachusetts business trust and is registered under
the Investment Company Act of 1940, as amended, as an open-end management
investment company.

The shareholders of each Series of the Trust are separate accounts of insurance
companies which offer variable annuity and/or life insurance products. As of
December 31, 1996 there were 23 shareholders in the Series.

(2) Significant Accounting Policies
General - The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates. Investments
in foreign securities are vulnerable to the effects of changes in the relative
values of the local currency and the U.S. dollar and to the effects of changes
in each country's legal, political and economic environment.

Investment Valuations - Debt securities (other than short-term obligations which
mature in 60 days or less), including listed issues and forward contracts, are
valued on the basis of valuations furnished by dealers or by a pricing service
with consideration to factors such as institutional-size trading in similar
groups of securities, yield, quality, coupon rate, maturity, type of issue,
trading characteristics and other market data, without exclusive reliance upon
exchange or over-the-counter prices. Short-term obligations, which mature in 60
days or less, are valued at amortized cost, which approximates market value.
Options listed on commodities exchanges are valued at closing settlement prices.
Over-the-counter options are valued by brokers through the use of a pricing
model which takes into account closing bond valuations, implied volatility and
short-term repurchase rates. Securities for which there are no such quotations
or valuations are valued at fair value as determined in good faith by or at the
direction of the Trustees.

Foreign Currency Translation - Investment valuations, other assets, and
liabilities initially expressed in foreign currencies are converted each
business day into U.S. dollars based upon current exchange rates. Purchases and
sales of foreign investments, income and expenses are converted into U.S.
dollars based upon currency exchange rates prevailing on the respective dates of
such transactions. Gains and losses attributable to foreign currency exchange
rates on sales of securities are recorded for financial statement purposes as
net realized gains and losses on investments. Gains and losses attributable to
foreign exchange rate movements on income and expenses are recorded for
financial statement purposes as foreign currency transaction gains and losses.
That portion of both realized and unrealized gains and losses on investments
that result from fluctuations in foreign currency exchange rates is not
separately disclosed.

Deferred Organization Expenses - Costs incurred by the Series in connection with
its organization have been deferred and are being amortized on a straight-line
basis over a five-year period beginning on the date of commencement of Series
operations.

Written Options - The Series may write covered call or put options for which
premiums are received and are recorded as liabilities, and are subsequently
adjusted to the current value of the options written. Premiums received from
writing options which expire are treated as realized gains. Premiums received
from writing options which are exercised or are closed are offset against the
proceeds or amount paid on the transaction to determine the realized gain or
loss. If a put option is exercised, the premium reduces the cost basis of the
security purchased by the Series. The Series, as writer of an option, may have
no control over whether the underlying securities may be sold (call) or
purchased (put) and, as a result, bears the market risk of an unfavorable change
in the price of the securities underlying the written option. In general,
written call options may serve as a partial hedge against decreases in value in
the underlying securities to the extent of the premium received. Written options
may also be used as part of an income producing strategy reflecting the view of
the Series' management on the direction of interest rates.

Forward Foreign Currency Exchange Contracts - The Series may enter into forward
foreign currency exchange contracts for the purchase or sale of a specific
foreign currency at a fixed price on a future date. Risks may arise upon
entering into these contracts from the potential inability of counterparties to
meet the terms of their contracts and from unanticipated movements in the value
of a foreign currency relative to the U.S. dollar. The Series will enter into
forward contracts for hedging purposes as well as for non-hedging purposes. For
hedging purposes, the Series may enter into contracts to deliver or receive
foreign currency it will receive from or require for its normal investment
activities. The Series may also use contracts in a manner intended to protect
foreign currency-denominated securities from declines in value due to
unfavorable exchange rate movements. For non-hedging purposes, the Series may
enter into contracts with the intent of changing the relative exposure of the
Series' portfolio of securities to different currencies to take advantage of
anticipated changes. The forward foreign currency exchange contracts are
adjusted by the daily exchange rate of the underlying currency and any gains or
losses are recorded for financial statement purposes as unrealized until the
contract settlement date.

Investment Transactions and Income - Investment transactions are recorded on the
trade date. Interest income is recorded on the accrual basis. All premium and
original issue discount are amortized or accreted for financial statement and
tax reporting purposes as required by federal income tax regulations. Interest
payments received in additional securities are recorded on the ex-interest date
in an amount equal to the value of the security on such date.

Fees Paid Indirectly - The Series' custodian bank calculates its fee based on
the Series' average daily net assets. This fee is reduced according to an
expense offset arrangement with State Street Bank, the dividend disbursing
agent, which provides for partial reimbursement of custody fees based on a
formula developed to measure the value of cash deposited by the Series with the
custodian and with the dividend disbursing agent. This amount is shown as a
reduction of expenses on the Statement of Operations.

Tax Matters and Distributions - The Series' policy is to comply with the
provisions of the Internal Revenue Code (the Code) applicable to regulated
investment companies and to distribute to shareholders all of its taxable
income, including any net realized gain on investments. Accordingly, no
provision for federal income or excise tax is provided. The Series files a tax
return annually using tax accounting methods required under provisions of the
Code which may differ from generally accepted accounting principles, the basis
on which these financial statements are prepared. Accordingly, the amount of net
investment income and net realized gain reported on these financial statements
may differ from that reported on the Series' tax return and, consequently, the
character of distributions to shareholders reported in the financial highlights
may differ from that reported to shareholders on Form 1099-DIV. Foreign taxes
have been provided for on interest and dividend income earned on foreign
investments in accordance with the applicable country's tax rates and to the
extent unrecoverable are recorded as a reduction of investment income. The
Series expects to pass through to shareholders foreign income taxes paid. The
election increases the taxable distributions of the Series by the amount of the
foreign taxes paid. An individual shareholder who itemizes deductions, or a
corporate shareholder, will be able to claim an offsetting deduction or a tax
credit (but not both) on their federal income tax returns. Individuals who do
not itemize deductions may claim a foreign tax credit but not a deduction. The
foreign source income is considered passive income for the purpose of computing
the foreign tax credit limitations. Distributions to shareholders are recorded
on the ex-dividend date.

The Series distinguishes between distributions on a tax basis and a financial
reporting basis and requires that only distributions in excess of tax basis
earnings and profits are reported in the financial statements as a tax return of
capital. Differences in the recognition or classification of income between the
financial statements and tax earnings and profits which result in temporary
over-distributions for financial statement purposes, are classified as
distributions in excess of net investment income or accumulated net realized
gains. During the year ended December 31, 1996, $277,457 was reclassified from
accumulated undistributed net investment income to accumulated undistributed net
realized gain on investments and foreign currency transactions due to
differences between book and tax accounting for currency transactions. This
change had no effect on the net assets or net asset value per share. At December
31, 1996, accumulated undistributed net investment income under book accounting
were different from tax accounting due to temporary differences in accounting
for currency transactions.

(3) Transactions with Affiliates
Investment Adviser - The Series has an investment advisory agreement with
Massachusetts Financial Services Company (MFS) to provide overall investment
advisory and administrative services, and general office facilities. The
management fee is computed daily and paid monthly at an annual rate of 0.75% of
average daily net assets. Under a temporary expense limitation agreement with
MFS, MFS has voluntarily agreed to pay all of the Series' operating expenses,
exclusive of management fees, which exceed 0.25% of the Series' average daily
net assets. The Series in turn will pay MFS an expense reimbursement fee not
greater than 0.25% of the Series' average daily net assets. To the extent that
the expense reimbursement fee exceeds the Series' actual expenses, the excess
will be applied to amounts paid by MFS in prior years. At December 31, 1996, the
aggregate unreimbursed expenses owed to MFS by the Series amounted to $252,340,
including $172,556 incurred in the current year.

The Series pays no compensation directly to its Trustees who are officers of the
investment adviser, or to officers of the Series, all of whom receive
remuneration for their services to the Series from MFS. Certain officers and
Trustees of the Series are officers or directors of MFS and MFS Service Center,
Inc. (MFSC).

Shareholder Servicing Agent - MFSC, a wholly owned subsidiary of MFS, earns a
fee for its services as shareholder servicing agent. The fee is calculated as a
percentage of the average daily net assets at an effective annual rate of up to
0.035%.

(4) Portfolio Securities
Purchases and sales of investments, other than purchased option transactions and
short-term obligations, were as follows:

                                                 Purchases            Sales
- ------------------------------------------------------------------------------
U.S. government securities                     $23,204,684      $20,453,094
                                               ===========      ===========
Investments (non-U.S. government securities)   $48,546,607      $34,428,896
                                               ===========      ===========

The cost and unrealized appreciation or depreciation in value of the investments
owned by the Series, as computed on a federal income tax basis, are as follows:

Aggregate cost                                                  $25,579,571
                                                                ===========
Gross unrealized appreciation                                   $   550,208
Gross unrealized depreciation                                      (183,622)
                                                                -----------
    Net unrealized appreciation                                 $   366,586
                                                                ===========

(5) Shares of Beneficial Interest
The Series' Declaration of Trust permits the Trustees to issue an unlimited
number of full and fractional shares of beneficial interest (without par value).
Transactions in Series shares were as follows:

<TABLE>
<CAPTION>
                                         Year Ended                          Year Ended
                                         December 31, 1996                   December 31, 1995
                                         ---------------------------------   -------------------------------
                                                 Shares             Amount         Shares            Amount
- ------------------------------------------------------------------------------------------------------------
<S>                                           <C>           <C>                   <C>         <C>          
Shares sold                                   3,252,833     $   33,174,815        861,022     $   9,272,850
Shares issued to shareholders in
  reinvestment of distributions                --                --                68,274           692,995
Shares reacquired                            (1,522,662)       (15,536,671)      (493,000)       (5,320,839)
                                             ----------     --------------       --------     -------------
  Net increase                                1,730,171     $   17,638,144        436,296     $   4,645,006
                                             ==========     ==============       ========     =============
</TABLE>

(6) Line of Credit
The Series entered into an agreement which enables it to participate with other
funds managed by MFS in an unsecured line of credit with a bank which permits
borrowings up to $350 million, collectively. Borrowings may be made to
temporarily finance the repurchase of Series shares. Interest is charged to each
fund, based on its borrowings, at a rate equal to the bank's base rate. In
addition, a commitment fee, based on the average daily unused portion of the
line of credit, is allocated among the participating funds at the end of each
quarter. The commitment fee allocated to the Series for the year ended December
31, 1996 was $108.

(7) Financial Instruments
The Series trades financial instruments with off-balance sheet risk in the
normal course of its investing activities in order to manage exposure to market
risks such as interest rates and foreign currency exchange rates. These
financial instruments include written options and forward foreign currency
exchange contracts. The notional or contractual amounts of these instruments
represent the investment the Series has in particular classes of financial
instruments and does not necessarily represent the amounts potentially subject
to risk. The measurement of the risks associated with these instruments is
meaningful only when all related and offsetting transactions are considered.

Written Option Transactions
<TABLE>
<CAPTION>
                                        1996 Calls                             1996 Puts
                                        ------------------------------------   ------------------------------------
                                            Principal Amounts                      Principal Amounts
                                                 of Contracts                           of Contracts
                                                (000 Omitted)       Premiums           (000 Omitted)       Premiums
- -------------------------------------------------------------------------------------------------------------------
OUTSTANDING, BEGINNING OF PERIOD -
<S>                                                <C>            <C>                       <C>            <C>      
  Australian Dollars                                    --        $  --                         145        $  1,853
  German Marks/British Pounds                             623          2,769                    --          --
  Italian Lire/German Marks                           596,334          9,883                 596,334         21,958
  Japanese Yen                                          --           --                       26,950          3,514
Options written -
  Australian Dollars                                      306          1,659                    --          --
  Canadian Dollars                                        721            740                   1,714          5,226
  German Marks                                         11,659         56,784                   1,683          4,619
  German Marks/British Pounds                           8,516         32,055                   6,270         97,304
  Italian Lire/German Marks                         1,651,102         12,004                    --          --
  Japanese Yen                                         76,546            961                 132,377          8,463
  New Zealand Dollar                                    --           --                          705          1,048
  Spanish Peseta/German Marks                           --           --                      129,477          3,205
  Swiss Francs/German Marks                             2,081          6,314                   4,572         56,461
Options terminated in closing transactions -
  Australian Dollars                                     (306)        (1,659)                   --          --
  German Marks                                        (11,659)       (56,784)                 (1,683)        (4,619)
  German Marks/British Pounds                          (2,019)        (6,568)                   --          --
  Italian Lire/German Marks                        (2,247,436)       (21,887)               (596,334)       (21,958)
  Japanese Yen                                        (76,546)          (961)                (85,950)        (7,621)
  New Zealand Dollar                                    --           --                         (705)        (1,048)
Options expired -
  Australian Dollars                                    --           --                         (145)        (1,853)
  Canadian Dollars                                       (721)          (740)                 (1,714)        (5,226)
  German Marks/British Pounds                          (4,126)       (16,785)                   --          --
  Japanese Yen                                          --           --                      (73,377)        (4,356)
  Spanish Peseta/German Marks                           --           --                     (129,477)        (3,205)
                                                    ---------     ----------                 -------       --------
OUTSTANDING, END OF PERIOD                              5,075     $   17,785                  10,842       $153,765
                                                    =========     ==========                 =======       ========
OPTIONS OUTSTANDING AT END OF PERIOD CONSIST OF:
  German Marks/British Pounds                           2,994     $   11,471                   6,270       $ 97,304
  Swiss Francs/German Marks                             2,081          6,314                   4,572         56,461
                                                    ---------     ----------                 -------       --------
OUTSTANDING, END OF PERIOD                              5,075     $   17,785                  10,842       $153,765
                                                    =========     ==========                 =======       ========
</TABLE>

At December 31, 1996, the Series had sufficient cash and/or securities at least
equal to the value of the written options.
<PAGE>
Forward Foreign Currency Exchange Contracts

<TABLE>
<CAPTION>
                                                                                                  Net Unrealized
                                                   Contracts  In Exchange          Contracts       Appreciation
                      Settlement Date     to Deliver/Receive             for        at Value     (Depreciation)
- ---------------------------------------------------------------------------------------------------------------
<S>                 <C>       <C>              <C>               <C>             <C>                 <C>        
Sales               2/20/97 - 4/21/97  AUD         2,697,746     $ 2,134,083     $ 2,139,540         $   (5,457)
                              2/24/97  BEF        11,969,832         394,004         378,957             15,047
                              2/20/97  CAD            12,909           9,458           9,452                  6
                              2/07/97  CHF         3,820,672       3,008,669       2,866,911            141,758
                    1/10/97 - 4/21/97  DEM        58,542,880      38,304,017      38,295,146              8,871
                              2/03/97  DKK         4,224,107         740,526         718,705             21,821
                              5/09/97  ECU           909,100       1,157,421       1,146,046             11,375
                              2/07/97  FRF         4,064,400         789,342         785,492              3,850
                    2/24/97 - 4/21/97  GBP         2,506,514       4,125,258       4,286,104           (160,846)
                              2/24/97  IEP         1,255,768       2,040,649       2,127,185            (86,536)
                    1/03/97 - 2/07/97  ITL     1,531,569,914       1,005,821       1,006,791               (970)
                    1/29/97 - 4/21/97  JPY     1,389,345,557      12,442,313      12,176,795            265,518
                              4/21/97  NZD         1,054,619         743,511         740,432              3,079
                    2/03/97 - 2/07/97  SEK         4,207,527         634,772         618,407             16,365
                                                                 -----------     -----------        -----------
                                                                 $67,529,844     $67,295,963        $   233,881
                                                                 ===========     ===========        ============
Purchases           2/20/97 - 4/21/97  AUD         1,810,075     $ 1,453,770     $ 1,435,555        $   (18,215)
                              2/07/97  CHF         3,718,357       2,956,135       2,790,137           (165,998)
                    2/07/97 - 4/22/97  DEM        40,624,120      26,488,345      26,561,042             72,697
                              2/07/97  DKK         3,024,120         510,305         514,641              4,336
                              4/21/97  ESP        24,636,350         189,579         189,319               (260)
                              2/07/97  FRF         4,067,555         806,193         786,102            (20,091)
                    2/24/97 - 4/21/97  GBP         1,058,929       1,752,499       1,810,366             57,867
                    1/10/97 - 2/07/97  ITL     2,064,401,327       1,347,349       1,357,335              9,986
                    1/21/97 - 4/22/97  JPY     3,360,250,862      30,383,032      29,458,921           (924,111)
                              2/03/97  NLG            33,399          19,620          19,389               (231)
                              5/09/97  NOK         7,337,586       1,157,421       1,145,970            (11,451)
                              4/21/97  NZD             5,295           3,724           3,717                 (7)
                              2/03/97  SEK         2,239,575         339,039         329,130             (9,909)
                                                                 -----------     -----------        -----------
                                                                 $67,407,011     $66,401,624        $(1,005,387)
                                                                 ===========     ===========        ===========
</TABLE>
Forward foreign currency purchases and sales under master netting arrangements
and closed forward foreign currency exchange contracts excluded above amounted
to a net payable of $132,652 with Bankers Trust Company, a net payable of
$34,163 with Swiss Bank, a net receivable of $499,084 with First Boston, a net
receivable of $28,645 with Goldman Sachs, a net receivable of $16,595 with JP
Morgan, and a net receivable of $8,476 with Merrill Lynch at December 31, 1996.

At December 31, 1996, the Series had sufficient cash and/or securities to cover
any commitments under these contracts.


<PAGE>
INDEPENDENT AUDITORS' REPORT

To the Trustees of MFS Variable Insurance Trust and Shareholders of MFS World
Governments Series:

We have audited the accompanying statement of assets and liabilities, including
the portfolio of investments, of MFS World Governments Series (the Series) (one
of the series constituting the MFS Variable Insurance Trust) as of December 31,
1996, the related statement of operations for the year then ended, and the
statements of changes in net assets and financial highlights for the years ended
December 31, 1996 and December 31, 1995 and for the period from June 14, 1994
(the commencement of investment operations) to December 31, 1994. These
financial statements and financial highlights are the responsibility of the
Series' management. Our responsibility is to express an opinion on these
financial statements and financial highlights based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of the securities owned at
December 31, 1996 by correspondence with the custodian and brokers; where
replies were not received from brokers, we performed other auditing procedures.
An audit also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of MFS World
Governments Series at December 31, 1996, the results of its operations, the
changes in its net assets, and its financial highlights for the respective
stated periods in conformity with generally accepted accounting principles.

DELOITTE & TOUCHE LLP

Boston, Massachusetts
February 7, 1997

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

This report is prepared for the general information of shareholders. It is
authorized for distribution to prospective investors only when preceded or
accompanied by a current prospectus.

<PAGE>























































                                                                    VWG-2/97 12M





<PAGE>

[logo] M F S(SM)                                                  ANNUAL REPORT
INVESTMENT MANAGEMENT                                            FOR YEAR ENDED
                                                              DECEMBER 31, 1996
MFS(R) BOND SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST


[Graphic Omitted]

<PAGE>

MFS(R) BOND SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST

TRUSTEES                                       INVESTMENT ADVISER              
A. Keith Brodkin*                              Massachusetts Financial Services
Chairman and President                           Company                       
                                               500 Boylston Street             
Nelson J. Darling, Jr.                         Boston, MA 02116-3741           
Trustee, Eastern Enterprises                                                   
(diversified holding company)                  DISTRIBUTOR                     
                                               MFS Fund Distributors, Inc.     
William R. Gutow                               500 Boylston Street             
Vice Chairman,                                 Boston, MA 02116-3741           
Capitol Entertainment Management Company                                       
(Blockbuster Video Franchise)                  SHAREHOLDER SERVICE CENTER      
                                               MFS Service Center, Inc.        
PORTFOLIO MANAGER                              P.O. Box 1400                   
Geoffrey L. Kurinsky*                          Boston, MA 02107-9906           
                                                                               
TREASURER                                      For additional information,     
W. Thomas London*                              contact your financial adviser. 
                                                                               
ASSISTANT TREASURER                            CUSTODIAN                       
James O. Yost*                                 Investors Bank & Trust Company  
                                                                               
SECRETARY                                      AUDITORS                        
Stephen E. Cavan*                              Deloitte & Touche LLP           
                                                                               
ASSISTANT SECRETARY                            WORLD WIDE WEB                  
James R. Bordewick, Jr.*                       www.mfs.com                     
                                               
*Affiliated with the Investment Adviser
<PAGE>

Dear Contract Owner:
The pattern of slow but sustainable growth seen in most of the world in 1996
seems likely to continue in 1997. While it looks as if U.S. growth in 1997 will
slow modestly relative to 1996, there is evidence that Europe and, to a lesser
degree, Japan are continuing their recoveries from recession. At the same time,
companies in many emerging markets are reporting robust increases in earnings as
these markets benefit from higher-than-average economic growth and market
reforms, which should continue to provide more opportunities for development and
trade.

    After more than six years of expansion, the U.S. economy appears headed
toward another year of at least moderate growth in 1997, although a few signs
point to the possibility of a modest rise in inflation during the year. On the
positive side, the pattern of moderate growth and inflation set over the past
few years now seems fairly well entrenched in the economy and, short of a major
international or domestic crisis, appears to have enough momentum to remain on
track for some time. Recent gains in such important sectors as housing,
automobiles, industrial production, and exports indicate a fair amount of
underlying strength in the economy. However, some reason for caution can be seen
in the continuing high level of consumer debt and the attendant rise in personal
bankruptcies, as well as in the modestly disappointing level of holiday sales.
Also, the ongoing tightness in labor markets, and price rises in such important
sectors as energy, could add some inflationary pressures to the economy. Given
these somewhat conflicting indicators, we expect real (inflation-adjusted)
growth to revolve around 2% in 1997, which would represent a modest decline from
1996.

    We continue to urge U.S. equity investors to lower their expectations for
1997 and to point out that the impressive gains of the past two years are not
sustainable. Just as the slowdown in corporate earnings growth and increases in
interest rates in 1996 raised some near-term concerns, further interest rate
increases and an acceleration of inflation could negatively affect the stock
market in 1997. However, to the extent that some slowdown in earnings means that
the economy is not overheating, this may be beneficial for the equity market in
the long run. Also, we believe many of the technology-driven productivity gains
that U.S. companies have made in recent years will continue to enhance corporate
America's competitiveness and profitability. Therefore, while we have some
near-term concerns, we remain reasonably positive about the long-term viability
of the equity market.

    In U.S. bond markets, conflicting signals over the strength of the economy
have created near-term volatility. Even comments by Federal Reserve Chairman
Alan Greenspan late in 1996 created some uncertainty over the Federal Reserve
Board's next move. We expect the Fed to maintain its anti-inflationary stance
should signs of more rapid economic growth and, particularly, higher inflation
resurface. While inflationary forces largely remained in check in 1996, the
continued strength in the labor market and rising energy prices mean that a
pickup in inflation is still possible. At the same time, the U.S. budget deficit
continues to decline and, as a percentage of gross domestic product, is now less
than 2%, which we consider a positive development for the bond markets. Although
interest rates may move higher over the coming months, we believe that, at
current levels, fixed-income markets remain equitably valued.

    Internationally, the environment of moderate growth, benign inflation, and
fairly steady interest rates is also providing support for investment markets
and should help support valuation levels in the coming year. Throughout the
world, the key to stock market performance in 1997 will be corporate earnings
growth. While U.S. earnings growth is slowing but still expected to be fairly
healthy, we anticipate that a number of European countries will see an
acceleration in earnings growth and improved valuations in 1997. Despite this
environment, many European countries trade at discounts to the United States. In
particular, we see opportunities in some of the multinationals and businesses
with the ability to generate steady earnings growth. In Japan, a recovery
appears to be taking place, but at a very modest rate, with valuations still at
high levels. In the emerging markets, the long-term economic growth story
remains intact and, although selectivity is even more important in these
markets, more companies are benefiting from this growth and trading at
below-average global valuations.

<PAGE>

    Comments from the portfolio manager of the Series are presented below. We
appreciate your support and welcome any questions or comments you may have.

Respectfully,

/s/ A. Keith Brodkin                  /s/ Geoffrey L. Kurinsky
    A. Keith Brodkin                      Geoffrey L. Kurinsky
    Chairman and President                Portfolio Manager

January 13, 1997

MFS BOND SERIES
For the year ended December 31, 1996, the Series provided a total return of
2.09%. This compares to a 2.90% return for the Lehman Brothers Government/
Corporate Bond Index, an unmanaged, market-value-weighted index of all debt
obligations of the U.S. Treasury and U.S. government agencies (excluding
mortgage-backed securities) and of all publicly issued fixed-rate,
nonconvertible, investment-grade domestic corporate debt. While intra-year
volatility moved interest rates in many directions in 1996, as a whole, interest
rates moved higher, making it a tough year for fixed-income investors. After
beginning the year at 5.5%, interest rates on 10-year Treasury securities ended
the year around 6.5%. This backup was caused by an unexpected pickup in economic
activity over the first half of the year and by fears of accelerating inflation,
which turned out to be unfounded.

    The Series continued to build up its weighting in investment-grade corporate
securities, which reached approximately 50% of the portfolio by year-end. We are
targeting an eventual 65% to 75% allocation of both high-grade and high-yield
corporate securities. As the U.S. economy continues its growth, we expect the
general rule that corporate securities outperform Treasury securities during
periods of economic growth will continue to prevail (although the principal
value and interest on Treasury securities are guaranteed by the U.S. government
if held to maturity). Credit fundamentals of corporations generally improve
during periods of economic growth and deteriorate during periods of recession.

    In terms of specific sectors, the Series' overweighted position in the
airline sector contributed to its strong performance. This sector provided a
return of 7.25% for the period, which was the best-performing sector of the
investment-grade corporate bond market. The sector continues to benefit from the
pickup in economic activity and a 10% to 20% increase in airline fares.

    The Series' exposure to the cable/media sector was a drag on performance
during the period. The sector's performance of 2.19% was among the worst in the
investment-grade corporate bond market. The Series' largest holding,
TeleCommunications Inc., underperformed as the Standard & Poor's rating agency
has alerted that it may return its rating to below-investment-grade status. We
have retained our position based on our view that the downgrade is already
reflected in current pricing. If the investment-grade ratings are affirmed,
there is the potential for significant price appreciation.

    Given our view that the market is fairly valued, we are maintaining the
Series duration (a measure of interest rate sensitivity) at 5.8 years, which we
consider appropriate for this Series' universe. We will persist in building our
exposure to both the investment-grade and high-yield corporate bond markets
based on our outlook for continued steady economic growth into 1997.

PORTFOLIO MANAGER'S PROFILE
Geoffrey L. Kurinsky is Senior Vice President of Massachusetts Financial
Services (MFS) and has managed MFS Bond Series since its inception in 1995. He
joined MFS in 1987 in the Fixed Income Department and was named Vice President
in 1990 and Senior Vice President in 1993. Mr. Kurinsky is a graduate of the
University of Massachusetts and holds a Master's in Business Administration and
Finance from Boston University.

<PAGE>

PERFORMANCE SUMMARY
The information below illustrates the historical performance of MFS Bond Series
shares in comparison to various market indicators. Benchmark comparisons are
unmanaged and do not reflect any fees or expenses. You cannot invest in an
index.

GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT
(For the Period from November 1, 1995 to December 31, 1996)

                            Lehman Brothers Government/           Consumer
         MFS Bond Series       Corporate Bond Index          Price Index -- U.S.
11/95        10000.0               10000.0                         10000.0
12/95        10300.0               10314.0                         10013.0
 3/96        10027.0               10073.0                         10152.0
 6/96         9987.0               10120.0                         10225.0
 9/96        10149.0               10299.0                         10300.0
12/96        10516.0               10614.0                         10372.0

AVERAGE ANNUAL TOTAL RETURN AS OF DECEMBER 31, 1996

                                                        1 Year             Life+
- --------------------------------------------------------------------------------
MFS Bond Series                                         +2.09%            +4.32%
- --------------------------------------------------------------------------------
Lehman Brothers Government/Corporate Bond Index(++)     +2.90%            +6.44%
- --------------------------------------------------------------------------------
Consumer Price Index*(++)                               +3.56%            +3.12%
- --------------------------------------------------------------------------------

 (+) For the period from the commencement of investment operations, October 24,
     1995 to December 31, 1996.
   * The Consumer Price Index is a popular measure of change in prices.
(++) Source: CDA/ Wiesenberger.

Returns shown do not reflect the deduction of the mortality and expense risk
charges and administration fees. Please refer to the product's annual report for
performance that reflects the fees and charges imposed by insurance company
separate accounts.

Investment return and principal value will fluctuate, and shares, when redeemed,
may be worth more or less than their original cost. Past performance is no
guarantee of future results.

Series results reflect any applicable expense subsidies and waivers, without
which the performance results would have been less favorable. Subsidies and
waivers may be rescinded at any time. See the prospectus for details.
<PAGE>

PORTFOLIO OF INVESTMENTS - December 31, 1996
Bonds - 83.4%
- --------------------------------------------------------------------------------
                                                 Principal Amount
Issuer                                              (000 Omitted)         Value
- --------------------------------------------------------------------------------
U.S. Bonds - 76.8%
  Airlines - 4.4%
    Continental Airlines, Inc., 9.5s, 2001##               $   10      $ 10,200
    Continental Airlines, Inc., 9.5s, 2013                      5         5,625
    Delta Airlines, Inc., 8.5s, 2002                           10        10,588
    Jet Equipment Trust, 9.41s, 2010##                          5         5,769
    Jet Equipment Trust, 8.64s, 2012##                          4         5,310
                                                                       --------
                                                                       $ 37,492
- --------------------------------------------------------------------------------
  Automotive - 0.6%                                                 
    Mark IV Industries, Inc., 7.75s, 2006                  $    5      $  4,912
- --------------------------------------------------------------------------------
  Banks and Credit Companies - 4.6%                                 
    ABN Amro Bank N.V., 7.3s, 2026                         $    5      $  4,838
    Advanta Corp., 7.47s, 2001                                  5         5,100
    BankAmerica Capital, 8s, 2026                               5         5,060
    Capital One Bank, 6.75s, 2000                              10         9,987
    Capital One Financial Corp., 7.25s, 2003                   10         9,838
    MBNA Capital, 8.278s, 2026                                  5         5,019
                                                                       --------
                                                                       $ 39,842
- --------------------------------------------------------------------------------
  Building - 1.2%                                                   
    USG Corp., 9.25s, 2001                                 $   10      $ 10,650
- --------------------------------------------------------------------------------
  Business Machines - 0.5%                                          
    International Business Machines Corp.,                          
      7.125s, 2006                                         $    5      $  4,831
- --------------------------------------------------------------------------------
  Consumer Goods and Services - 0.6%                                
    Philip Morris Cos., Inc., 7.65s, 2008                  $    5      $  5,106
- --------------------------------------------------------------------------------
  Entertainment - 1.8%                                              
    Time Warner, Inc., 7.45s, 1998                         $    5      $  5,055
    Time Warner, Inc., 8.375s, 2023                            10        10,138
                                                                       --------
                                                                       $ 15,193
- --------------------------------------------------------------------------------
  Financial Institutions - 3.6%                                     
    Contifinancial Corp., 8.375s, 2003                     $    5      $  5,150
    Crown, Cork & Seal Finance, 7s, 2006                        5         4,944
    Hubco, Inc., 8.2s, 2006##                                   5         5,200
    Lehman Brothers Holdings, 7.5s, 2026                       10        10,250
    Salton Sea Funding Corp., 7.84s, 2010                       5         5,027
                                                                       --------
                                                                       $ 30,571
- --------------------------------------------------------------------------------
  Food and Beverage Products - 1.2%                                 
    RJR Nabisco, Inc., 8.75s, 2004                         $   10      $ 10,093
- --------------------------------------------------------------------------------
  Forest and Paper Products - 1.2%                                  
    Boise Cascade Corp., 7.43s, 2005                       $   10      $ 10,150
- --------------------------------------------------------------------------------
  Insurance - 4.4%                                                  
    Equitable Life Assurance, 7.7s, 2015                   $    3      $  3,026
    Fairfax Financial Holdings Ltd., 8.3s, 2026                 5         5,217
    Liberty Mutual Insurance Co., 8.2s, 2007##                  5         5,310
    Nationwide Mutual Insurance Co., 7.5s, 2024##              10         9,320
    Travelers Capital, 7.75s, 2036                             15        14,550
                                                                       --------
                                                                       $ 37,423
- --------------------------------------------------------------------------------
  Medical and Health Technology and Services - 0.6%                 
    Tenet Healthcare Corp., 8.625s, 2003                   $    5      $  5,275
- --------------------------------------------------------------------------------
  Oils - 4.1%                                                       
    Enserch Exploration, Inc., 7.54s, 2009##               $    5      $  4,925
    Mitchell Energy & Development Corp.,                            
      6.75s, 2004                                              10         9,339
    Oryx Energy Co., 8.375s, 2004                              10        10,334
    Tosco Corp., 7.625s, 2006                                  10        10,324
                                                                       --------
                                                                       $ 34,922
- --------------------------------------------------------------------------------
  Real Estate Investment Trusts - 1.8%                              
    Loewen Group International, Inc., 7.5s, 2001           $   10      $ 10,000
    Taubman Realty Group, 8s, 2001                              5         5,161
                                                                       --------
                                                                       $ 15,161
- --------------------------------------------------------------------------------
  Special Products and Services - 0.6%                              
    Stewart Enterprises, 6.7s, 2003                        $    5      $  4,906
- --------------------------------------------------------------------------------
  Stores - 0.6%                                                     
    Price/Costco, Inc., 7.125s, 2005                       $    5      $  5,001
- --------------------------------------------------------------------------------
  Telecommunications - 3.8%                                         
    360 Communications Co., 7.5s, 2006                     $    7      $  6,943
    Tele-Communications, Inc., 7.385s, 2001                    20        20,198
    Tele-Communications, Inc., 10.125s, 2022                    5         5,490
                                                                       --------
                                                                       $ 32,631
- --------------------------------------------------------------------------------
  U.S. Treasury Obligations - 31.0%                                 
    U.S. Treasury Notes, 6s, 1999                          $   10      $  9,998
    U.S. Treasury Notes, 9.125s, 1999                           5         5,343
    U.S. Treasury Notes, 6.5s, 2001                             5         5,055
    U.S. Treasury Notes, 6.5s, 2005                             5         5,032
    U.S. Treasury Notes, 6.5s, 2006                            41        41,224
    U.S. Treasury Notes, 6.875s, 2006                         110       113,352
    U.S. Treasury Notes, 7s, 2006                              36        37,401
    U.S. Treasury Bonds, 7.625s, 2025                           6         6,665
    U.S. Treasury Bonds, 6.75s, 2026                           40        40,300
                                                                       --------
                                                                       $264,370
- --------------------------------------------------------------------------------
  Utilities - Electric - 7.8%                                       
    Arkansas Power & Light Co., 8.75s, 2026                $   10      $ 10,302
    Coastal Corp., 7.75s, 2035                                 20        20,361
    First PV Funding Corp., 10.3s, 2014                         5         5,325
    Long Island Lighting Co., 8.9s, 2019                       15        15,304
    Louisiana Power & Light Co., 8.75s, 2026                    5         5,056
    Niagara Mohawk Power, 8s, 2004                              5         4,803
    Texas-New Mexico Power Co., 12.5s, 1999                     5         5,432
                                                                       --------
                                                                       $ 66,583
- --------------------------------------------------------------------------------
  Utilities - Gas - 2.4%                                            
    California Energy Co., 0s, 2004                        $    5      $  5,268
    Louis Dreyfus Natural Gas, 9.25s, 2004                      5         5,256
    NGC Corp., 7.625s, 2026                                     5         5,094
    Ras Laffan Gas, 8.294s, 2014##                              5         5,067
                                                                       --------
                                                                       $ 20,685
- --------------------------------------------------------------------------------
Total U.S. Bonds                                                       $655,797
- --------------------------------------------------------------------------------
Foreign Bonds - 6.6%                                                
  Australia - 0.6%                                                  
    Qantas Airways Ltd., 7.5s, 2003                                 
      (Airlines)##                                         $    5      $  5,114
- --------------------------------------------------------------------------------
  Canada - 2.4%                                                     
    Canadian Pacific Forest, 9.25s, 2002                            
      (Forest and Paper Products)                          $    5      $  5,080
    Gulf Canada Resources Ltd., 8.35s, 2006                         
      (Utilities - Gas)                                         5         5,169
    Husky Oil Ltd., 7.125s, 2006 (Oils)                        10        10,000
                                                                       --------
                                                                       $ 20,249
- --------------------------------------------------------------------------------
  Chile - 1.8%                                                      
    Empresa Electric Pehuenche, 7.3s, 2003                          
      (Utilities - Electric)                               $   15      $ 15,164
- --------------------------------------------------------------------------------
  South Africa - 0.6%                                               
    Republic of South Africa, 8.375s, 2006                          
      (Government)                                         $    5      $  5,000
- --------------------------------------------------------------------------------
  Thailand - 1.2%                                                   
    Northrop-Grumman Corp., 9.375s, 2024                            
      (Aerospace)                                          $    5      $  5,594
    Total Access Communications, 8.375s, 2006                       
      (Telecommunications)##                                    5         5,016
                                                                       --------
                                                                       $ 10,610
- --------------------------------------------------------------------------------
Total Foreign Bonds                                                    $ 56,137
- --------------------------------------------------------------------------------
Total Bonds (Identified Cost, $705,657)                                $711,934
- --------------------------------------------------------------------------------
Short-Term Obligation - 25.8%                                       
- --------------------------------------------------------------------------------
  Federal Home Loan Bank, due 1/02/97, at                           
    Amortized Cost                                         $  220      $219,936
- --------------------------------------------------------------------------------
Total Investments (Identified Cost, $925,593)                          $931,870
Other Assets, Less Liabilities - (9.2)%                                 (78,669)
- --------------------------------------------------------------------------------
Net Assets - 100.0%                                                    $853,201
- --------------------------------------------------------------------------------
##SEC Rule 144A restriction.                                     

See notes to financial statements
<PAGE>

FINANCIAL STATEMENTS

Statement of Assets and Liabilities
- ------------------------------------------------------------------------------
December 31, 1996
- ------------------------------------------------------------------------------
Assets:
  Investments, at value (identified cost, $925,593)                 $931,870
  Cash                                                                10,219
  Receivable for Series shares sold                                      659
  Interest receivable                                                 12,654
  Receivable from investment adviser                                  14,958
  Deferred organization expenses                                       7,009
  Other assets                                                             2
                                                                    --------
      Total assets                                                  $977,371
                                                                    --------
Liabilities:
  Payable for Series shares reacquired                              $     86
  Payable for investments purchased                                  104,021
  Payable to affiliate for management fee                                 41
  Accrued expenses and other liabilities                              20,022
                                                                    --------
      Total liabilities                                             $124,170
                                                                    --------
Net assets                                                          $853,201
                                                                    ========
Net assets consist of:
  Paid-in capital                                                   $850,160
  Unrealized appreciation on investments                               6,277
  Accumulated net realized loss on investments                        (3,478)
  Accumulated undistributed net investment income                        242
                                                                    --------
      Total                                                         $853,201
                                                                    ========
Shares of beneficial interest outstanding                            84,785
                                                                     ======
Net asset value per share
  (net assets of $853,201 / 84,785 shares of beneficial interest
  outstanding)                                                       $10.06
                                                                     ======
See notes to financial statements
<PAGE>

FINANCIAL STATEMENTS - continued

Statement of Operations
- ------------------------------------------------------------------------------
Year Ended December 31, 1996
- ------------------------------------------------------------------------------
Net investment income:
  Interest income                                                    $33,192
                                                                     -------
  Expenses -
    Management fee                                                   $ 2,924
    Trustees' compensation                                             2,033
    Shareholder servicing agent fee                                      169
    Auditing fees                                                     21,306
    Printing                                                          13,563
    Custodian fee                                                      2,266
    Amortization of organization expenses                              1,842
    Legal fees                                                         1,026
    Miscellaneous                                                        728
                                                                     -------
      Total expenses                                                 $45,857
    Fees paid indirectly                                                (154)
    Reduction of expenses by investment adviser                      (40,829)
                                                                     -------
      Net expenses                                                   $ 4,874
                                                                     -------
        Net investment income                                        $28,318
                                                                     -------
Realized and unrealized gain (loss) on investments:
  Realized loss on investment transactions (identified cost basis)   $(3,478)
                                                                     -------
  Change in unrealized appreciation on investments                   $ 2,384
                                                                     -------
    Net realized and unrealized loss on investments                  $(1,094)
                                                                     -------
      Increase in net assets from operations                         $27,224
                                                                     =======
See notes to financial statements
<PAGE>

FINANCIAL STATEMENTS - continued

Statements of Changes in Net Assets
- ------------------------------------------------------------------------------
                                              Year Ended         Period Ended
                                       December 31, 1996   December 31, 1995*
- ------------------------------------------------------------------------------
Increase (decrease) in net assets:
From operations -
  Net investment income                         $ 28,318             $  2,011
  Net realized gain (loss) on
    investments                                   (3,478)                 643
  Net unrealized gain on investments               2,384                3,893
                                                --------             --------
    Increase in net assets from
      operations                                $ 27,224             $  6,547
                                                --------             --------
Distributions declared to shareholders -
  From net investment income                    $(28,266)            $ (2,011)
  From net realized gain on
    investments                                    --                    (453)
                                                --------             --------
      Total distributions declared to
        shareholders                            $(28,266)            $ (2,464)
                                                --------             --------
Series share (principal) transactions -
  Net proceeds from sale of shares              $683,975             $217,828
  Net asset value of shares issued to
    shareholders in reinvestment of
    distributions                                 28,266                2,464
  Cost of shares reacquired                      (85,933)              (5,040)
                                                --------             --------
    Increase in net assets from
      Series share transactions                 $626,308             $215,252
                                                --------             --------
      Total increase in net assets              $625,266             $219,335
Net assets:
  At beginning of period                         227,935                8,600
                                                --------             --------
  At end of period (including
    accumulated undistributed net
    investment income of $242 and $0,
    respectively)                               $853,201             $227,935
                                                ========             ========

*For the period from the commencement of investment operations, October 24,
 1995 to December 31, 1995.

See notes to financial statements

<PAGE>

FINANCIAL STATEMENTS - continued

Financial Highlights
- -------------------------------------------------------------------------------
                                             Year Ended           Period Ended
                                      December 31, 1996      December 31, 1995*
- -------------------------------------------------------------------------------
Per share data (for a share outstanding throughout each period):
Net asset value - beginning of period            $10.19               $ 10.00
                                                 ------               -------
Income from investment operations# -
  Net investment income(S)                       $ 0.58               $  0.09
  Net realized and unrealized gain (loss) on
    investments                                   (0.36)                 0.21
                                                 ------               -------
    Total from investment operations             $ 0.22               $  0.30
                                                 ------               -------
Less distributions declared to shareholders -
  From net investment income                     $(0.35)              $ (0.09)
  From net realized gain on investments             --                  (0.02)
                                                 ------               -------
    Total distributions declared to 
      shareholders                               $(0.35)              $ (0.11)
                                                 ------               -------
Net asset value - end of period                  $10.06               $ 10.19
                                                 ======               =======
Total return                                      2.09%                 3.02%++
Ratios (to average net assets)/Supplemental data(S):
  Expenses                                        1.00%                 1.00%+
  Net investment income                           5.84%                 4.89%+
Portfolio turnover                                 231%                   55%
Net assets at end of period (000 omitted)        $  853               $   228

  * For the period from the commencement of investment operations, October 24,
    1995 to December 31, 1995.
  + Annualized.
 ++ Not annualized.
  # Per share data is based on average shares outstanding.
(S) The adviser voluntarily agreed to maintain the expenses of the Series at not
    more than 1.00% of average daily net assets. To the extent actual expenses
    were over these limitations, the net investment loss per share and the
    ratios would have been:

  Net investment loss                           $(0.26)              $ (0.70)
  Ratios (to average net assets):
    Expenses                                     9.45%                43.85%+
    Net investment loss                        (2.61)%              (37.96)%+

See notes to financial statements

<PAGE>

NOTES TO FINANCIAL STATEMENTS

(1) Business and Organization
MFS Bond Series (the Series) is a diversified series of MFS Variable Insurance
Trust (the Trust) which is comprised of the following 12 series: MFS Bond
Series, MFS Emerging Growth Series, MFS Growth with Income Series, MFS High
Income Series, MFS Limited Maturity Series, MFS Money Market Series, MFS
Research Series, MFS Strategic Fixed Income Series, MFS Total Return Series, MFS
Utilities Series, MFS Value Series and MFS World Governments Series. The Trust
is organized as a Massachusetts business trust and is registered under the
Investment Company Act of 1940, as amended, as an open-end management investment
company.

The shareholders of each Series of the Trust are separate accounts of insurance
companies which offer variable annuity and/or life insurance products. As of
December 31, 1996 there were eight shareholders in the Series.

(2) Significant Accounting Policies
General - The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.

Investment Valuations - Debt securities (other than short-term obligations which
mature in 60 days or less), including listed issues, are valued on the basis of
valuations furnished by dealers or by a pricing service with consideration to
factors such as institutional-size trading in similar groups of securities,
yield, quality, coupon rate, maturity, type of issue, trading characteristics
and other market data, without exclusive reliance upon exchange or
over-the-counter prices. Short-term obligations, which mature in 60 days or
less, are valued at amortized cost, which approximates market value. Securities
for which there are no such quotations or valuations are valued at fair value as
determined in good faith by or at the direction of the Trustees.

Deferred Organization Expenses - Costs incurred by the Series in connection with
its organization have been deferred and are being amortized on a straight-line
basis over a five-year period beginning on the date of commencement of Series
operations.

Investment Transactions and Income - Investment transactions are recorded on the
trade date. Interest income is recorded on the accrual basis. All premium and
original issue discount are amortized or accreted for financial statement and
tax reporting purposes as required by federal income tax regulations. Interest
payments received in additional securities are recorded on the ex- interest date
in an amount equal to the value of the security on such date.

Fees Paid Indirectly - The Series' custodian bank calculates its fee based on
the Series' average daily net assets. This fee is reduced according to an
expense offset arrangement with State Street Bank, the dividend disbursing
agent, which provides for partial reimbursement of custody fees based on a
formula developed to measure the value of cash deposited by the Series with the
custodian and with the dividend disbursing agent. This amount is shown as a
reduction of expenses on the Statement of Operations.

Tax Matters and Distributions - The Series' policy is to comply with the
provisions of the Internal Revenue Code (the Code) applicable to regulated
investment companies and to distribute to shareholders all of its taxable
income, including any net realized gain on investments. Accordingly, no
provision for federal income or excise tax is provided. The Series files a tax
return annually using tax accounting methods required under provisions of the
Code which may differ from generally accepted accounting principles, the basis
on which these financial statements are prepared. Accordingly, the amount of net
investment income and net realized gain reported on these financial statements
may differ from that reported on the Series' tax return and, consequently, the
character of distributions to shareholders reported in the financial highlights
may differ from that reported to shareholders on Form 1099-DIV. Distributions to
shareholders are recorded on the ex-dividend date.

The Series distinguishes between distributions on a tax basis and a financial
reporting basis and requires that only distributions in excess of tax basis
earnings and profits are reported in the financial statements as a tax return of
capital. Differences in the recognition or classification of income between the
financial statements and tax earnings and profits which result in temporary
over-distributions for financial statement purposes, are classified as
distributions in excess of net investment income or accumulated net realized
gains. During the year ended December 31, 1996, $190 was reclassified from
accumulated net realized loss on investments to accumulated undistributed net
investment income due to differences between book and tax accounting for
distributions. This change had no effect on the net assets or net asset value
per share. At December 31, 1996, accumulated undistributed net investment income
and accumulated net realized loss on investments under book accounting were
different from tax accounting due to temporary differences in accounting for
wash sales and spillbacks.

At December 31, 1996, the Series, for federal income tax purposes, had a capital
loss carryforward of $3,306 which may be applied against any net taxable
realized gains of each succeeding year until the earlier of its utilization or
expiration on December 31, 2004.

(3) Transactions with Affiliates
Investment Adviser - The Series has an investment advisory agreement with
Massachusetts Financial Services Company (MFS) to provide overall investment
advisory and administrative services, and general office facilities. The
management fee is computed daily and paid monthly at an annual rate of 0.60% of
average daily net assets. Under a temporary expense limitation agreement with
MFS, MFS has voluntarily agreed to pay all of the Series' operating expenses,
exclusive of management fees, which exceed 0.40% of the Series' average daily
net assets. The Series in turn will pay MFS an expense reimbursement fee not
greater than 0.40% of the Series' average daily net assets. To the extent that
the expense reimbursement fee exceeds the Series' actual expenses, the excess
will be applied to amounts paid by MFS in prior years. At December 31, 1996, the
aggregate unreimbursed expenses owed to MFS by the Series amounted to $58,452,
including $40,829 incurred in the current year.

The Series pays no compensation directly to its Trustees who are officers of the
investment adviser, or to officers of the Series, all of whom receive
remuneration for their services to the Series from MFS. Certain officers and
Trustees of the Series are officers or directors of MFS and MFS Service Center,
Inc. (MFSC).

Shareholder Servicing Agent - MFSC, a wholly owned subsidiary of MFS, earns a
fee for its services as shareholder servicing agent. The fee is calculated as a
percentage of the average daily net assets at an effective annual rate of up to
0.035%.

(4) Portfolio Securities
Purchases and sales of investments, other than purchased option transactions and
short-term obligations, were as follows:

                                                       Purchases         Sales
- ------------------------------------------------------------------------------
U.S. government securities                              $575,086      $373,317
                                                        ========      ========
Investments (non-U.S. government securities)            $833,741      $558,370
                                                        ========      ========

The cost and unrealized appreciation or depreciation in value of the investments
owned by the Series, as computed on a federal income tax basis, are as follows:

Aggregate cost                                                       $925,593
                                                                     ========
Gross unrealized appreciation                                        $  8,930
Gross unrealized depreciation                                          (2,653)
                                                                     --------
    Net unrealized appreciation                                      $  6,277
                                                                     ========

(5) Shares of Beneficial Interest
The Series' Declaration of Trust permits the Trustees to issue an unlimited
number of full and fractional shares of beneficial interest (without par value).
Transactions in Series shares were as follows:

                    Year Ended                  Period Ended
                    December 31, 1996           December 31, 1995*
                    --------------------------  --------------------------
                        Shares         Amount       Shares         Amount
- --------------------------------------------------------------------------
Shares sold             68,218       $683,975       21,762       $217,828
Shares issued to
 shareholders in
 reinvestment of
 distributions           2,796         28,266          242          2,464
Shares reacquired       (8,589)       (85,933)        (504)        (5,040)
                        ------       --------       ------       --------
    Net increase        62,425       $626,308       21,500       $215,252
                        ======       ========       ======       ========
* For the period from the commencement of investment operations, October 24,
  1995 to December 31, 1995.

(6) Line of Credit
The Series entered into an agreement which enables it to participate with other
funds managed by MFS in an unsecured line of credit with a bank which permits
borrowings up to $350 million, collectively. Borrowings may be made to
temporarily finance the repurchase of Series shares. Interest is charged to each
fund, based on its borrowings, at a rate equal to the bank's base rate. In
addition, a commitment fee, based on the average daily unused portion of the
line of credit, is allocated among the participating funds at the end of each
quarter. The commitment fee allocated to the Series for the year ended December
31, 1996 was $6.

<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Trustees of MFS Variable Insurance Trust and Shareholders of MFS Bond
Series:

We have audited the accompanying statement of assets and liabilities, including
the portfolio of investments, of MFS Bond Series (the Series) (one of the series
constituting the MFS Variable Insurance Trust) as of December 31, 1996, the
related statement of operations for the year then ended, the statements of
changes in net assets and financial highlights for the year then ended and for
the period from October 24, 1995 (the commencement of investment operations) to
December 31, 1995. These financial statements and financial highlights are the
responsibility of the Series' management. Our responsibility is to express an
opinion on these financial statements and financial highlights based on our
audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of the securities owned at
December 31, 1996 by correspondence with the custodian and brokers; where
replies were not received from brokers, we performed other auditing procedures.
An audit also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. We believe that our audits provide a reasonable basis
for our opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of MFS Bond Series at
December 31, 1996, the results of its operations, the changes in its net assets,
and its financial highlights for the respective stated periods in conformity
with generally accepted accounting principles.

DELOITTE & TOUCHE LLP

Boston, Massachusetts
February 7, 1997

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

This report is prepared for the general information of shareholders. It is
authorized for distribution to prospective investors only when preceded or
accompanied by a current prospectus.

<PAGE>




























































                                                                   VFB-X 2/97 2M



<PAGE>
[logo] M F S(SM)                                                  ANNUAL REPORT
INVESTMENT MANAGEMENT                                            FOR YEAR ENDED
                                                              DECEMBER 31, 1996
MFS(R) LIMITED MATURITY SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST


[Graphic Omitted]
<PAGE>
MFS(R) LIMITED MATURITY SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST

<TABLE>
<C>                                                                 <C>
TRUSTEES                                                            INVESTMENT ADVISER
A. Keith Brodkin*                                                   Massachusetts Financial Services Company
Chairman and President                                              500 Boylston Street
                                                                    Boston, MA 02116-3741
Nelson J. Darling, Jr.
Trustee, Eastern Enterprises                                        DISTRIBUTOR
(diversified holding company)                                       MFS Fund Distributors, Inc.
                                                                    500 Boylston Street
William R. Gutow                                                    Boston, MA 02116-3741
Vice Chairman,
Capitol Entertainment Management Company                            SHAREHOLDER SERVICE CENTER
(Blockbuster Video Franchise)                                       MFS Service Center, Inc.
                                                                    P.O. Box 1400
PORTFOLIO MANAGER                                                   Boston, MA 02107-9906
Geoffrey L. Kurinsky*
                                                                    For additional information,
TREASURER                                                           contact your financial adviser.
W. Thomas London*
                                                                    CUSTODIAN
ASSISTANT TREASURER                                                 Investors Bank & Trust Company
James O. Yost*
                                                                    AUDITORS
SECRETARY                                                           Deloitte & Touche LLP
Stephen E. Cavan*
                                                                    WORLD WIDE WEB
ASSISTANT SECRETARY                                                 www.mfs.com
James R. Bordewick, Jr.*

*Affiliated with the Investment Adviser
</TABLE>
<PAGE>
Dear Contract Owner:
The pattern of slow but sustainable growth seen in most of the world in 1996
seems likely to continue in 1997. While it looks like U.S. growth in 1997 will
slow modestly relative to 1996, there is evidence that Europe and, to a lesser
degree, Japan are continuing their recoveries from recession. At the same
time, companies in many emerging markets are reporting robust increases in
earnings as these markets benefit from higher-than-average economic growth and
market reforms. This should continue to provide more opportunities for
development and trade.

    After more than six years of expansion, the U.S. economy appears headed
toward another year of moderate growth in 1997, although a few signs point to
the possibility of a modest rise in inflation during the year. On the positive
side, the pattern of moderate growth and inflation set over the past few years
now seems fairly well entrenched in the economy and, short of a major
international or domestic crisis, appears to have enough momentum to remain on
track for some time. Recent gains in such important sectors as housing,
automobiles, industrial production, and exports indicate a fair amount of
underlying strength in the economy. However, some reason for caution can be
seen in the continuing high level of consumer debt and the attendant rise in
personal bankruptcies, as well as in the modestly disappointing level of
holiday sales. Furthermore, the ongoing tightness in labor markets, and price
rises in such important sectors as energy, could add some inflationary
pressures to the economy. Given these somewhat conflicting indicators, we
expect real (inflation-adjusted) growth to revolve around 2% in 1997, which
would represent a modest decline from 1996.

    We continue to urge U.S. equity investors to lower their expectations for
1997 and to point out that the impressive gains of the past two years are not
sustainable. Just as the slowdown in corporate earnings growth and increases
in interest rates in 1996 raised some near-term concerns, further interest
rate increases and an acceleration of inflation could negatively affect the
stock market in 1997. However, to the extent that some slowdown in earnings
means that the economy is not overheating, this may be beneficial for the
equity market in the long run. We believe many of the technology-driven
productivity gains that U.S. companies have made in recent years will continue
to enhance corporate America's competitiveness and profitability. Therefore,
while we have some near-term concerns, we remain reasonably positive about the
long-term viability of the equity market.

    In U.S. bond markets, conflicting signals over the strength of the economy
have created near-term volatility. Even comments by Federal Reserve Chairman
Alan Greenspan in late 1996 created some uncertainty over the Federal Reserve
Board's next move. We expect the Fed to maintain its anti-inflationary stance
should signs of more rapid economic growth and, particularly, higher inflation
resurface. While inflationary forces largely remained in check in 1996, the
continued strength in the labor market and rising energy prices mean that a
pickup in inflation is still possible. At the same time, the U.S. budget
deficit continues to decline and, as a percentage of gross domestic product,
is now less than 2%, which we consider a positive development for the bond
markets. Although interest rates may move higher over the coming months, we
believe that, at current levels, fixed-income markets remain equitably valued.

    Internationally, the environment of moderate growth, benign inflation, and
fairly steady interest rates is also providing support for investment markets
and should help support valuation levels in the coming year. Throughout the
world, the key to stock market performance in 1997 will be corporate earnings
growth. While U.S. earnings growth is slowing, but still expected to be fairly
healthy, we anticipate that a number of European countries will see an
acceleration in earnings growth and improved valuations in 1997. Despite this
environment, many European countries trade at discounts to the United States.
In particular, we see opportunities in some of the multinationals, and
businesses with the ability to generate steady earnings growth. In Japan, a
recovery appears to be taking place, but at a very modest rate, with
valuations still at high levels. In the emerging markets, the long-term
economic growth story remains intact and, although selectivity is even more
important in these markets, more companies are benefiting from this growth and
trading at below-average global valuations.
<PAGE>

    Comments from the portfolio manager of the Series are presented below. We
appreciate your support and welcome any questions or comments you may have.

Respectfully,

/s/A. Keith Brodkin                       /s/Geoffrey L. Kurinsky
   A. Keith Brodkin                          Geoffrey L. Kurinsky
   Chairman and President                    Portfolio Manager

 January 9, 1997


MFS LIMITED MATURITY SERIES

The Series commenced operations on August 14, 1996, and from that date through
December 31, 1996, provided a total return of 2.61%. This was a strong period
for shorter-maturity fixed-income securities as interest rates on two-year
Treasuries fell from 6.40% to 5.75%, while the market adopted the view that
the pace of economic growth was declining. There was no change in rates from
the Federal Reserve as the economy continued to grow, albeit at a slower pace,
and inflationary pressures remained absent. Despite market concerns over a
pickup in the pace of inflation, both labor costs and commodity prices
remained relatively restrained.

    The Series' performance benefited from the decline in interest rates and
the Series' overweighting in investment-grade securities. As is typical in
periods of strong economic activity, the 3.83% return of short-term "BBB"
investment-grade corporate securities for the last half of 1996 outperformed
Treasury securities, which returned 3.57% according to Lehman Brothers.
(Principal value and interest on Treasury securities are guaranteed by the
U.S. government if held to maturity.) The Series' weightings in "BBB"
investment-grade securities stands at around 45% of the portfolio, which is a
higher exposure than competing funds of the competitive universe as defined by
Lipper Analytical Services, Inc., an independent firm which reports mutual
fund performance.

    Looking forward, we will continue to increase the Series' exposure to
investment-grade corporate securities toward the 65% level. This is consistent
with our view that the corporate securities will continue outperforming
Treasuries as 1997 marks another year of steady economic growth.

PORTFOLIO MANAGER'S PROFILE

Geoffrey L. Kurinsky is Senior Vice President of Massachusetts Financial
Services (MFS) and manages MFS Limited Maturity Series. He joined MFS as
Portfolio Manager in the Fixed Income Department in 1987 and was named Vice
President in 1990 and Senior Vice President in 1993. Mr. Kurinsky is a
graduate of the University of Massachusetts and holds an M.B.A. in Finance
from Boston University.

PERFORMANCE SUMMARY

The information below illustrates the historical performance of MFS Limited
Maturity Series shares in comparison to various market indicators. Benchmark
comparisons are unmanaged and do not reflect any fees or expenses. You cannot
invest in an index.


<PAGE>

GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT
(For the Period from August 1, 1996 to December 31, 1996)

               MFS            Consumer       Merrill Lynch
               Limited        Price          1-5 Year
               Maturity       Index -        Government/Corporate
Date           Series         U.S.           Bond Index
- ----           --------       --------       --------------------
 8/96          10000.0        10000.0        10000.0
 8/96           9940.0        10020.0        10024.0
 9/96          10060.0        10054.0        10134.0
10/96          10200.0        10086.0        10274.0
11/96          10300.0        10105.0        10375.0
12/96          10260.0        10124.0        10348.0


AGGREGATE TOTAL RETURNS AS OF DECEMBER 31, 1996
                                                                         Life+
- ------------------------------------------------------------------------------
MFS Limited Maturity Series                                           + 2.61%
- ------------------------------------------------------------------------------
Average short-term investment-grade debt fund                         + 2.48%
- ------------------------------------------------------------------------------
Merrill Lynch One- to Five-year Government/Corporate Bond Index++**   + 3.48%
- ------------------------------------------------------------------------------
Consumer Price Index*++                                               + 1.24%
- ------------------------------------------------------------------------------
 *The Consumer Price Index is a popular measure of change in prices.
**The Merrill Lynch one- to five-year Government/Corporate Bond Index is an
  unmanaged composite of coupon-bearing Treasury issues, debt of the U.S.
  government and its agencies, and corporate debt rated BB/Baa or better.
 +For the period from the commencement of investment operations, August 14,
  1996 to December 31, 1996.
++Source: CDA/Wiesenberger.

Returns shown do not reflect the deduction of the mortality and expense risk
charges and administrative fees. Please refer to the product's annual report
for performance that reflects the fees and charges imposed by insurance
company separate accounts.

Investment return and principal value will fluctuate, and shares, when
redeemed, may be worth more or less than their original cost. Past performance
is no guarantee of future results.

Series results reflect any applicable expense subsidies and waivers, without
which the performance results would have been less favorable. Subsidies and
waivers may be rescinded at any time. See the prospectus for details.
<PAGE>
PORTFOLIO OF INVESTMENTS - December 31, 1996

Bonds - 95.2%
- -----------------------------------------------------------------------------
                                                   Principal Amount
Issuer                                                (000 Omitted)     Value
- -----------------------------------------------------------------------------
U.S. Bonds - 91.3%
  Banks and Credit Companies - 7.7%
    Advanta Corp., 7.47s, 2001                                 $ 20  $ 20,345
    Capital One Financial Corp., 7.25s, 2003                     20    19,675
                                                                     --------
                                                                     $ 40,020
- -----------------------------------------------------------------------------
  Entertainment - 3.9%
    Time Warner, Inc., 7.45s, 1998                             $ 20  $ 20,220
- -----------------------------------------------------------------------------
  Financial Services - 1.0%
    United Cos. Financial Corp., 9.35s, 1999                   $  5  $  5,318
- -----------------------------------------------------------------------------
  Food and Beverage Products - 11.7%
    Great Atlantic & Pacific Tea Co., Inc.,
      9.125s, 1998                                             $ 20  $ 20,514
    Nabisco, Inc., 8s, 2000                                      20    20,775
    RJR Nabisco, Inc., 8s, 2001                                  20    20,064
                                                                     --------
                                                                     $ 61,353
- -----------------------------------------------------------------------------
  Forest and Paper Products - 2.1%
    Boise Cascade Corp., 9.9s, 2001                            $ 10  $ 11,199
- -----------------------------------------------------------------------------
  Real Estate Investment Trusts - 3.9%
    Taubman Realty Group, 8s, 2001                             $ 20  $ 20,643
- -----------------------------------------------------------------------------
  Telecommunications - 3.8%
    Tele-Communications, Inc., 6.275s, 2003                    $ 20  $ 19,900
- -----------------------------------------------------------------------------
  U.S. Government and Agency Obligations - 55.3%
    Federal National Mortgage Assn., 7.5s, 2011                $ 97  $ 99,205
    U.S. Treasury Notes, 9.125s, 1999                           135   144,260
    U.S. Treasury Notes, 6.875s, 2000                            20    20,450
    U.S. Treasury Notes, 6.25s, 2001                             25    25,023
                                                                     --------
                                                                     $288,938
- -----------------------------------------------------------------------------
  Utilities - Electric - 1.9%
    System Energy Resources, 7.8s, 2000                        $ 10  $ 10,121
- -----------------------------------------------------------------------------
Total U.S. Bonds                                                     $477,712
- -----------------------------------------------------------------------------
Foreign Bonds - 3.9%
  Chile
    Empresa Electrica Guacolda S.A., 7.6s, 2001
      (Utilities - Electric)##                                 $ 20  $ 20,275
- -----------------------------------------------------------------------------
Total Bonds (Identified Cost, $496,110)                              $497,987
- -----------------------------------------------------------------------------

Short-Term Obligations - 1.9%
- -----------------------------------------------------------------------------
  Federal Home Loan Bank, due 1/02/97,
    at Amortized Cost                                          $ 10  $  9,997
- -----------------------------------------------------------------------------
Total Investments (Identified Cost, $506,107)                        $507,984

Other Assets, Less Liabilities - 2.9%                                  14,948
- -----------------------------------------------------------------------------
Net Assets - 100.0%                                                  $522,932
- -----------------------------------------------------------------------------
## SEC Rule 144A restriction.

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS

Statement of Assets and Liabilities
- ----------------------------------------------------------------------------
December 31, 1996
- ----------------------------------------------------------------------------
Assets:
  Investments, at value (identified cost, $506,107)                $507,984
  Cash                                                                1,378
  Interest receivable                                                 7,464
  Receivable from investment adviser                                  2,771
  Deferred organization expenses                                      8,499
                                                                   --------
      Total assets                                                 $528,096
                                                                   --------
Liabilities:
  Payable to affiliate for management fee                          $     23
  Accrued expenses and other liabilities                              5,141
                                                                   --------
      Total liabilities                                            $  5,164
                                                                   --------
Net assets                                                         $522,932
                                                                   ========
Net assets consist of:
  Paid-in capital                                                  $522,437
  Unrealized appreciation on investments                              1,877
  Accumulated net realized loss on investments                       (1,431)
  Accumulated undistributed net investment income                        49
                                                                   --------
      Total                                                        $522,932
                                                                   ========
Shares of beneficial interest outstanding                           52,239
                                                                    ======
Net asset value per share
  (net assets of $522,932 / 52,239 shares of beneficial
  interest outstanding)                                             $10.01
                                                                    ======

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS - continued

Statement of Operations
- -----------------------------------------------------------------------------
Period Ended December 31, 1996*
- -----------------------------------------------------------------------------
Net investment income:
    Interest income                                                   $14,813
                                                                      -------
  Expenses -
    Management fee                                                    $ 1,064
    Trustees' compensation                                                508
    Shareholder servicing agent fee                                        66
    Custodian fee                                                          82
    Printing                                                            8,401
    Auditing fees                                                       2,356
    Legal fees                                                            994
    Amortization of organization expenses                                 689
    Miscellaneous                                                         540
                                                                      -------
      Total expenses                                                  $14,700
    Fees paid indirectly                                                  (59)
    Reduction of expenses by investment adviser                       (12,705)
                                                                      -------
      Net expenses                                                    $ 1,936
                                                                      -------
        Net investment income                                         $12,877
                                                                      -------
Realized and unrealized gain (loss) on investments:
  Realized loss (identified cost basis) on investment
    transactions                                                      $(1,440)
                                                                      -------
  Change in unrealized appreciation on investments                    $ 1,877
                                                                      -------
      Net realized and unrealized gain on investments                 $   437
                                                                      -------
        Increase in net assets from operations                        $13,314
                                                                      =======

*For the period from the commencement of investment operations, August 14,
 1996 to December 31, 1996.

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS - continued

Statement of Changes in Net Assets
- ----------------------------------------------------------------------------
Period Ended December 31, 1996*
- ----------------------------------------------------------------------------
Increase (decrease) in net assets:
From operations -
  Net investment income                                            $ 12,877
  Net realized loss on investments                                   (1,440)
  Net unrealized gain on investments                                  1,877
                                                                   --------
    Increase in net assets from operations                         $ 13,314
                                                                   --------
Distributions declared to shareholders from net investment
  income                                                           $(12,819)
                                                                   --------
Series share (principal) transactions -
  Net proceeds from sale of shares                                 $501,018
  Net asset value of shares issued to shareholders in
    reinvestment of distributions                                    12,819
                                                                   --------
    Increase in net assets from Series share transactions          $513,837
                                                                   --------
      Total increase in net assets                                 $514,332
Net assets:
  At beginning of period                                              8,600
                                                                   --------
  At end of period (including accumulated undistributed net
    investment income of $49)                                      $522,932
                                                                   ========

*For the period from the commencement of investment operations, August 14,
 1996 to December 31, 1996.

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS - continued

Financial Highlights
- ---------------------------------------------------------------------------
Period Ended December 31, 1996*
- ---------------------------------------------------------------------------
Per share data (for a share outstanding throughout each period):
Net asset value - beginning of period                               $10.00
                                                                    ------
Income from investment operations# -
  Net investment income(S)                                          $ 0.25
  Net realized and unrealized gain on investments and foreign
    currency transactions                                             0.01
                                                                    ------
      Total from investment operations                              $ 0.26
                                                                    ------
Less distributions declared to shareholders -
  From net investment income                                        $(0.25)
                                                                    ------
Net asset value - end of period                                     $10.01
                                                                    ======
Total return                                                         2.61%++
Ratios (to average net assets)/Supplemental data(S):
  Expenses                                                           1.00%+
  Net investment income                                              6.61%+
Portfolio turnover                                                    109%
Average commission rate
Net assets at end of period (000 omitted)                           $  523

  * For the period from the commencement of investment operations, August 14,
    1996 to December 31, 1996.
  + Annualized.
 ++ Not annualized.
#   Per share data is based on average shares outstanding.
(S) The Adviser voluntarily agreed to maintain the expenses of the Series at
    not more than 1.00% of average daily net assets. To the extent actual
    expenses were over these limitations, the net investment income per share
    and the ratios would have been:
    Net investment income                                           $ 0.01
    Ratios (to average net assets):
      Expenses                                                       7.55%+
      Net investment income                                          0.06%+

See notes to financial statements
<PAGE>
NOTES TO FINANCIAL STATEMENTS

(1) Business and Organization
MFS Limited Maturity Series (the Series) is a diversified series of MFS
Variable Insurance Trust (the Trust) which is comprised of the following 12
series: MFS Bond Series, MFS Emerging Growth Series, MFS Growth with Income
Series, MFS High Income Series, MFS Limited Maturity Series, MFS Money Market
Series, MFS Research Series, MFS Strategic Fixed Income Series, MFS Total
Return Series, MFS Utilities Series, MFS Value Series and MFS World
Governments Series. The Trust is organized as a Massachusetts business trust
and is registered under the Investment Company Act of 1940, as amended, as an
open-end management investment company.

The shareholders of each Series of the Trust are separate accounts of
insurance companies which offer variable annuity and/or life insurance
products. As of December 31, 1996 there were eight shareholders in the Series.

(2) Significant Accounting Policies
General - The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.

Investment Valuations - Debt securities (other than short-term obligations
which mature in 60 days or less), including listed issues, are valued on the
basis of valuations furnished by dealers or by a pricing service with
consideration to factors such as institutional-size trading in similar groups
of securities, yield, quality, coupon rate, maturity, type of issue, trading
characteristics and other market data, without exclusive reliance upon
exchange or over-the-counter prices. Short-term obligations, which mature in
60 days or less, are valued at amortized cost, which approximates market
value. Securities for which there are no such quotations or valuations are
valued at fair value as determined in good faith by or at the direction of the
Trustees.

Deferred Organization Expenses - Costs incurred by the Series in connection
with its organization have been deferred and are being amortized on a
straight-line basis over a five-year period beginning on the date of
commencement of Series operations.

Investment Transactions and Income - Investment transactions are recorded on
the trade date. Interest income is recorded on the accrual basis. All premium
and original issue discount are amortized or accreted for financial statement
and tax reporting purposes as required by federal income tax regulations.
Interest payments received in additional securities are recorded on the ex-
interest date in an amount equal to the value of the security on such date.

Fees Paid Indirectly - The Series' custodian bank calculates its fee based on
the Series' average daily net assets. This fee is reduced according to an
expense offset arrangement with State Street Bank, the dividend disbursing
agent, which provides for partial reimbursement of custody fees based on a
formula developed to measure the value of cash deposited by the Series with
the custodian and with the dividend disbursing agent. This amount is shown as
a reduction of expenses on the Statement of Operations.

Tax Matters and Distributions - The Series' policy is to comply with the
provisions of the Internal Revenue Code (the Code) applicable to regulated
investment companies and to distribute to shareholders all of its net taxable
income, including any net realized gain on investments. Accordingly, no
provision for federal income or excise tax is provided. The Series files a tax
return annually using tax accounting methods required under provisions of the
Code which may differ from generally accepted accounting principles, the basis
on which these financial statements are prepared. Accordingly, the amount of
net investment income and net realized gain reported on these financial
statements may differ from that reported on the Series' tax return and,
consequently, the character of distributions to shareholders reported in the
financial highlights may differ from that reported to shareholders on Form
1099-DIV. Distributions to shareholders are recorded on the ex-dividend date.

The Series distinguishes between distributions on a tax basis and a financial
reporting basis and requires that only distributions in excess of tax basis
earnings and profits are reported in the financial statements as a tax return
of capital. Differences in the recognition or classification of income between
the financial statements and tax earnings and profits which result in
temporary over-distributions for financial statement purposes, are classified
as distributions in excess of net investment income or accumulated net
realized gains. During the period ended December 31, 1996, $9 was reclassified
from accumulated undistributed net investment income to accumulated net
realized loss on investments due to differences between book and tax
accounting for asset-backed securities. This change had no effect on the net
assets or net asset value per share. At December 31, 1996, accumulated
undistributed net investment income and net realized loss on investments under
book accounting were different from tax accounting due to temporary
differences in accounting for wash sales and capital loss carryforwards.

At December 31, 1996, the Series, for federal income tax purposes, had a
capital loss carryforward of $1,267 which may be applied against any net
taxable realized gains of each succeeding year until the earlier of its
utilization or expiration on December 31, 2004.

(3) Transactions with Affiliates
Investment Adviser - The Series has an investment advisory agreement with
Massachusetts Financial Services Company (MFS) to provide overall investment
advisory and administrative services, and general office facilities. The
management fee is computed daily and paid monthly at an annual rate of 0.55%
of average daily net assets. Under a temporary expense limitation agreement
with MFS, MFS has voluntarily agreed to pay all of the Series' operating
expenses, exclusive of management fees, which exceed 0.45% of the Series'
average daily net assets. The Series in turn will pay MFS an expense
reimbursement fee not greater than 0.45% of the Series' average daily net
assets. To the extent that the expense reimbursement fee exceeds the Series'
actual expenses, the excess will be applied to amounts paid by MFS in prior
years. At December 31, 1996, the aggregate unreimbursed expenses owed to MFS
by the Series amounted to $12,705.

The Series pays no compensation directly to its Trustees who are officers of
the investment adviser, or to officers of the Series, all of whom receive
remuneration for their services to the Series from MFS. Certain officers and
Trustees of the Series are officers or directors of MFS and MFS Service
Center, Inc. (MFSC).

Shareholder Servicing Agent - MFSC, a wholly owned subsidiary of MFS, earns a
fee for its services as shareholder servicing agent. The fee is calculated as
a percentage of the average daily net assets at an effective annual rate of up
to 0.035%.

(4) Portfolio Securities
Purchases and sales of investments, other than purchased option transactions
and short-term obligations, were as follows:
                                                Purchases         Sales
- -----------------------------------------------------------------------
U.S. government securities                       $580,641      $387,764
                                                 ========      ========
Investments (non-U.S. government securities)     $456,493      $150,622
                                                 ========      ========

The cost and unrealized appreciation or depreciation in value of the
investments owned by the Series, as computed on a federal income tax basis,
are as follows:

Aggregate cost                                                 $506,107
                                                               ========
Gross unrealized appreciation                                  $  3,067
Gross unrealized depreciation                                    (1,190)
                                                               --------
    Net unrealized appreciation                                $  1,877
                                                               ========

(5) Shares of Beneficial Interest
The Series' Declaration of Trust permits the Trustees to issue an unlimited
number of full and fractional shares of beneficial interest (without par
value). Transactions in Series shares were as follows:


                                               Period Ended
                                               December 31, 1996*
                                               -------------------------
                                                    Shares        Amount
- ------------------------------------------------------------------------
Shares sold                                         50,102      $501,018
Shares issued to shareholders in
  reinvestment of distributions                      1,277        12,819
                                                    ------      --------
    Net increase                                    51,379      $513,837
                                                    ======      ========
*For the period from the commencement of investment operations, August 14,
 1996 to December 31, 1996.

(6) Line of Credit
The Series entered into an agreement which enables it to participate with
other funds managed by MFS in an unsecured line of credit with a bank which
permits borrowings up to $350 million, collectively. Borrowings may be made to
temporarily finance the repurchase of Series shares. Interest is charged to
each fund, based on its borrowings, at a rate equal to the bank's base rate.
In addition, a commitment fee, based on the average daily unused portion of
the line of credit, is allocated among the participating funds at the end of
each quarter. The commitment fee allocated to the Series for the period ended
December 31, 1996 was $4.
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Trustees of MFS Variable Insurance Trust and Shareholders of MFS
Limited Maturity Series:

We have audited the accompanying statement of assets and liabilities,
including the portfolio of investments, of MFS Limited Maturity Series (the
Series) (one of the series constituting the MFS Variable Insurance Trust) as
of December 31, 1996, the related statement of operations and the statements
of changes in net assets and financial highlights for the period from August
14, 1996 (the commencement of investment operations) to December 31, 1996.
These financial statements and financial highlights are the responsibility of
the Series' management. Our responsibility is to express an opinion on these
financial statements and financial highlights based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to
obtain reasonable assurance about whether the financial statements and
financial highlights are free of material misstatement. An audit includes
examining, on a test basis, evidence supporting the amounts and disclosures in
the financial statements. Our procedures included confirmation of the
securities owned at December 31, 1996 by correspondence with the custodian and
brokers. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of MFS Limited
Maturity Series at December 31, 1996, the results of its operations, the
changes in its net assets, and its financial highlights for the respective
stated periods in conformity with generally accepted accounting principles.

DELOITTE & TOUCHE LLP

Boston, Massachusetts
February 7, 1997



                ---------------------------------------------
This report is prepared for the general information of shareholders. It is
authorized for distribution to prospective investors only when preceded or
accompanied by a current prospectus.
<PAGE>




                                                                  VLM-2/97 230


<PAGE>
[logo]  M F S(SM)                                               ANNUAL REPORT
INVESTMENT MANAGEMENT                                          FOR YEAR ENDED
                                                            DECEMBER 31, 1996

MFS(R) MONEY MARKET SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST

[graphic omitted]

<PAGE>
MFS(R) MONEY MARKET SERIES
A SERIES OF MFS(R) VARIABLE INSURANCE TRUST

<TABLE>
<S>                                                 <C>
TRUSTEES                                            INVESTMENT ADVISER
A. Keith Brodkin*                                   Massachusetts Financial Services Company
Chairman and President                              500 Boylston Street
                                                    Boston, MA 02116-3741
Nelson J. Darling, Jr.
Trustee, Eastern Enterprises                        DISTRIBUTOR
(diversified holding company)                       MFS Fund Distributors, Inc.
                                                    500 Boylston Street
William R. Gutow                                    Boston, MA 02116-3741
Vice Chairman,
Capitol Entertainment Management Company            SHAREHOLDER SERVICE CENTER
(Blockbuster Video Franchise)                       MFS Service Center, Inc.
                                                    P.O. Box 1400
PORTFOLIO MANAGER                                   Boston, MA 02107-9906
Geoffrey L. Kurinsky*
                                                    For additional information,
TREASURER                                           contact your financial adviser.
W. Thomas London*
                                                    CUSTODIAN
ASSISTANT TREASURER                                 Investors Bank & Trust Company
James O. Yost*
                                                    AUDITORS
SECRETARY                                           Deloitte & Touche LLP
Stephen E. Cavan*
                                                    WORLD WIDE WEB
ASSISTANT SECRETARY                                 www.mfs.com
James R. Bordewick, Jr.*


*Affiliated with the Investment Adviser
</TABLE>
<PAGE>

Dear Contract Owner:
The pattern of slow but sustainable growth seen in most of the world in 1996
seems likely to continue in 1997. While it looks like U.S. growth in 1997 will
slow modestly relative to 1996, there is evidence that Europe and, to a lesser
degree, Japan are continuing their recoveries from recession. At the same time,
companies in many emerging markets are reporting robust increases in earnings as
these markets benefit from higher-than-average economic growth and market
reforms. This should continue to provide more opportunities for development and
trade.

    After more than six years of expansion, the U.S. economy appears headed
toward another year of moderate growth in 1997, although a few signs point to
the possibility of a modest increase in inflation during the year. On the
positive side, the pattern of moderate growth and inflation set over the past
few years now seems fairly well entrenched in the economy and, short of a major
international or domestic crisis, appears to have enough momentum to remain on
track for some time. Recent gains in such important sectors as housing,
automobiles, industrial production, and exports indicate a fair amount of
underlying strength in the economy. However, some reason for caution can be seen
in the continuing high level of consumer debt and the attendant rise in personal
bankruptcies, as well as in the modestly disappointing level of holiday sales.
Furthermore, the ongoing tightness in labor markets, and price rises in such
important sectors as energy, could add some inflationary pressures to the
economy. Given these somewhat conflicting indicators, we expect real
(inflation-adjusted) growth to revolve around 2% in 1997, which would represent
a modest decline from 1996.

    We continue to urge U.S. equity investors to lower their expectations for
1997 and to point out that the impressive gains of the past two years are not
sustainable. Just as the slowdown in corporate earnings growth and increases in
interest rates in 1996 raised some near-term concerns, further interest rate
increases and an acceleration of inflation could negatively affect the stock
market in 1997. However, to the extent that some slowdown in earnings means that
the economy is not overheating, this may be beneficial for the equity market in
the long run. We believe many of the technology-driven productivity gains that
U.S. companies have made in recent years will continue to enhance corporate
America's competitiveness and profitability. Therefore, while we have some
near-term concerns, we remain reasonably positive about the long-term viability
of the equity market.

    In U.S. bond markets, conflicting signals over the strength of the economy
have created near-term volatility. Even comments by Federal Reserve Board
Chairman Alan Greenspan in late 1996 created some uncertainty over the Federal
Reserve's next move. However, we expect the Fed to maintain its
anti-inflationary stance should signs of more rapid economic growth and,
particularly, higher inflation resurface. While inflationary forces largely
remained in check in 1996, the continued strength in the labor market and rising
energy prices mean that a pickup in inflation is still possible. At the same
time, the U.S. budget deficit continues to decline and, as a percentage of gross
domestic product, is now less than 2%, which we consider a positive development
for the bond markets. Although interest rates may move higher over the coming
months, we believe that, at current levels, fixed-income markets remain
equitably valued.

    Internationally, the environment of moderate growth, benign inflation, and
fairly steady interest rates is also providing support for investment markets
and should help support valuation levels in the coming year. Throughout the
world, the key to stock market performance in 1997 will be corporate earnings
growth. While U.S. earnings growth is slowing, but still expected to be fairly
healthy, we anticipate that a number of European countries will see an
acceleration in earnings growth and improved valuations in 1997. Despite this
environment, many European countries trade at discounts to the United States. In
particular, we see opportunities in some of the multinationals and businesses
with the ability to generate steady earnings growth. In Japan, a recovery
appears to be taking place, but at a very modest rate, with valuations still at
high levels. In the emerging markets, the long-term economic growth story
remains intact and, although selectivity is even more important in these
markets, more companies are benefiting from this growth and trading at
below-average global valuations.

    Comments from the portfolio manager of the Series are presented below. We
appreciate your support and welcome any questions or comments you may have.

Respectfully,

/s/ A. Keith Brodkin                       /s/Geoffrey L. Kurinsky
    A. Keith Brodkin                          Geoffrey L. Kurinsky
    Chairman and President                    Portfolio Manager

    January 13, 1997

MFS MONEY MARKET SERIES

The Series seeks as high a level of current income as is considered consistent
with the preservation of capital and liquidity. The Series endeavors to achieve
this by investing in short-term money market securities issued or guaranteed by
the U.S. Treasury or its agencies, or instrumentalities of the U.S. government,
as well as the highest quality corporate issues in order to minimize credit
risk. As of December 31, 1996, the portfolio had assets of approximately
$632,000, which were invested in seven different government issues with an
average maturity of 44 days.

    We anticipate short-term interest rates to remain flat over the next several
months.

    The Series is neither insured nor guaranteed by the U.S. government, and
there can be no assurance that it will be able to maintain a stable net asset
value of $1.00 per share.

PORTFOLIO MANAGER'S PROFILE

Geoffrey L. Kurinsky is Senior Vice President of Massachusetts Financial
Services (MFS) and has managed MFS Money Market Series since 1995. He joined
MFS as Portfolio Manager in the Fixed Income Department in 1987 and was named
Vice President in 1990 and Senior Vice President in 1993. Mr. Kurinsky is a
graduate of the University of Massachusetts and holds an M.B.A. in Finance
from Boston University.

TAX FORM SUMMARY
In January 1997, shareholders will be mailed a tax form summary reporting the
federal tax status of all distributions paid during the calendar year 1996.

PERFORMANCE SUMMARY

The information below illustrates the historical performance of MFS Money Market
Series shares in comparison to various market indicators. Benchmark comparisons
are unmanaged and do not reflect any fees or expenses. You cannot invest in an
index.

AVERAGE ANNUAL TOTAL RETURNS AS OF DECEMBER 31, 1996
                                             1 Year                Life+
- --------------------------------------------------------------------------
MFS Money Market Series                      +4.55%              +4.47%
- --------------------------------------------------------------------------
Consumer Price Index++*                      +3.56%              +3.04%
- --------------------------------------------------------------------------
 +For the period from the commencement of investment operations, January 3, 1995
  to December 31, 1996.
++Source: CDA/Wiesenberger.
 *The Consumer Price Index is a popular measure of change in prices.

Returns shown do not reflect the deduction of the mortality and expense risk
charges and administrative fees. Please refer to the product's annual report for
performance that reflects the fees and charges imposed by insurance company
separate accounts.

Results are based on past performance which is no guarantee of future results.

Series results reflect any applicable expense subsidies and waivers, without
which the performance results would have been less favorable. Subsidies and
waivers may be rescinded at any time. See the prospectus for details.
<PAGE>

PORTFOLIO OF INVESTMENTS - December 31, 1996

U.S. Government and Agency Obligations - 100.1%
- -------------------------------------------------------------------------------
                                                   Principal Amount
Issuer                                                (000 Omitted)     Value
- -------------------------------------------------------------------------------
Federal Farm Credit Bank, due 1/22/97 - 11/17/97               $110  $108,000
Federal Home Loan Bank, due 1/02/97 - 2/14/97                    96    95,640
Federal Home Loan Mortgage Corp., due 1/02/97 - 2/13/97         130   129,474
Federal National Mortgage Assn., due 1/07/97 - 6/16/97          131   129,962
Student Loan Marketing Assn., due 1/02/97                       110   109,980
Tennessee Valley Authority, due 1/06/97 - 1/28/97                30    29,946
U.S. Treasury Bills, due 1/09/97                                 30    29,970
- -------------------------------------------------------------------------------
Total Investments, at Amortized Cost                                 $632,972

Other Assets, Less Liabilities - (0.1)%                                  (354)
- -------------------------------------------------------------------------------
Net Assets - 100.0%                                                  $632,618
- -------------------------------------------------------------------------------

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS

Statement of Assets and Liabilities
- ------------------------------------------------------------------------------
December 31, 1996
- ------------------------------------------------------------------------------
Assets:
  Investments, at amortized cost and value                          $632,972
  Cash                                                                 1,689
  Receivable from investment adviser                                  16,635
  Deferred organization expenses                                       5,535
                                                                    --------
      Total assets                                                  $656,831
                                                                    --------
Liabilities:
  Distributions payable                                             $  1,875
  Payable to affiliates for management fee                                26
  Accrued expenses and other liabilities                              22,312
                                                                    --------
      Total liabilities                                             $ 24,213
                                                                    --------
Net assets (represented by paid-in capital)                         $632,618
                                                                    ========
Shares of beneficial interest outstanding                           632,618
                                                                    =======
Net asset value per share
  (net assets of $632,618 / 632,618 shares of beneficial
  interest outstanding)                                               $1.00
                                                                      =====

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS - continued

Statement of Operations
- ------------------------------------------------------------------------------
Year Ended December 31, 1996
- ------------------------------------------------------------------------------
Net investment income:
  Interest income                                               $ 8,853
                                                                -------
  Expenses -
    Management fee                                              $   858
    Trustees' compensation                                        2,033
    Shareholder servicing agent fee                                  59
    Auditing fees                                                28,106
    Printing                                                     12,858
    Amortization of organization expenses                         1,842
    Legal fees                                                    1,146
    Custodian fee                                                   341
    Miscellaneous                                                   662
                                                                -------
      Total expenses                                            $47,905
    Fees paid indirectly                                            (43)
    Reduction of expenses by investment adviser                 (46,831)
                                                                -------
      Net expenses                                              $ 1,031
                                                                -------
        Net investment income                                   $ 7,822
                                                                =======

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS - continued

Statements of Changes in Net Assets
- -------------------------------------------------------------------------------
                                                 Year Ended        Period Ended
                                          December 31, 1996  December 31, 1995*
- -------------------------------------------------------------------------------
Increase (decrease) in net assets:
From operations -
  Net investment income, declared as
    distributions to shareholders                  $  7,822            $  5,423
                                                   --------            --------
Series share (principal) transactions at net asset
  value of $1.00 per share -
  Net proceeds from sale of shares                 $643,286            $290,633
  Net asset value of shares issued to
    shareholders in reinvestment of
    distributions                                     5,947               5,321
  Cost of shares reacquired                        (196,749)           (124,420)
                                                   --------            --------
      Total increase in net assets                 $452,484            $171,534
Net assets:
  At beginning of period                            180,134               8,600
                                                   --------            --------
  At end of period                                 $632,618            $180,134
                                                   ========            ========

*For the period from the commencement of investment operations, January 3, 1995
 to December 31, 1995.

See notes to financial statements
<PAGE>
FINANCIAL STATEMENTS - continued

Financial Highlights
- -------------------------------------------------------------------------------
                                                 Year Ended        Period Ended
                                          December 31, 1996  December 31, 1995*
- -------------------------------------------------------------------------------
Per share data (for a share outstanding throughout each period):
Net asset value - beginning of period                $ 1.00             $ 1.00
                                                     ------             ------
Income from investment operations# -
  Net investment income(S)                           $ 0.04             $ 0.04
                                                     ------             ------
Less distributions declared to shareholders
  from net investment income                          (0.04)             (0.04)
                                                     ------             ------
Net asset value - end of period                      $ 1.00             $ 1.00
                                                     ======             ======
Total return                                          4.55%              4.37%++
Ratios (to average net assets)/Supplemental data(S):
  Expenses                                            0.60%              0.60%+
  Net investment income                               4.53%              4.54%+
Net assets at end of period (000 omitted)            $  633             $  180

  *For the period from the commencement of investment operations, January 3,
   1995 to December 31, 1995.
  +Annualized.
 ++Not annualized.
  #Per share data is based on average shares outstanding.
(S)The Adviser voluntarily agreed to maintain the expenses of the Series at not
   more than 0.60% of average daily net assets. To the extent actual expenses
   were over these limitations, the net investment loss per share and the ratios
   would have been:
   Net investment loss                               $(0.21)            $(0.14)
   Ratios (to average net assets):
    Expenses                                         27.74%             21.54%+
    Net investment loss                            (22.61)%           (16.37)%+

See notes to financial statements
<PAGE>
NOTES TO FINANCIAL STATEMENTS

(1) Business and Organization
MFS Money Market Series (the Series) is a diversified series of MFS Variable
Insurance Trust (the Trust) which is comprised of the following 12 series: MFS
Bond Series, MFS Emerging Growth Series, MFS Growth with Income Series, MFS High
Income Series, MFS Limited Maturity Series, MFS Money Market Series, MFS
Research Series, MFS Strategic Fixed Income Series, MFS Total Return Series, MFS
Utilities Series, MFS Value Series and MFS World Governments Series. The Trust
is organized as a Massachusetts business trust and is registered under the
Investment Company Act of 1940, as amended, as an open-end management investment
company.

The shareholders of each Series of the Trust are separate accounts of insurance
companies which offer variable annuity and/or life insurance products. As of
December 31, 1996 there were eight shareholders in the Series.

(2) Significant Accounting Policies
General - The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities and
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results could differ from those estimates.

Investment Valuation - Money market instruments are valued at amortized cost,
which the Trustees have determined in good faith constitutes fair value. The
Trust's use of amortized cost is subject to the Trust's compliance with certain
conditions as specified under Rule 2a-7 of the Investment Company Act of 1940.

Deferred Organization Expenses - Costs incurred by the Series in connection with
its organization have been deferred and are being amortized on a straight-line
basis over a five-year period beginning on the date of commencement of Series
operations.

Investment Transactions and Income - Investment transactions are recorded on the
trade date. Interest income is recorded on the accrual basis. All premium and
original issue discount are amortized or accreted for financial statement and
tax reporting purposes as required by federal income tax regulations.

Fees Paid Indirectly - The Series' custodian bank calculates its fee based on
the Series' average daily net assets. This fee is reduced according to an
expense offset arrangement with State Street Bank, the dividend disbursing
agent, which provides for partial reimbursement of custody fees based on a
formula developed to measure the value of cash deposited by the Series with the
custodian and with the dividend disbursing agent. This amount is shown as a
reduction of expenses on the Statement of Operations.

Tax Matters and Distributions - The Series' policy is to comply with the
provisions of the Internal Revenue Code (the Code) applicable to regulated
investment companies and to distribute to shareholders all of its taxable
income, including any net realized gain on investments. Accordingly, no
provision for federal income or excise tax is provided. The Series files a tax
return annually using tax accounting methods required under provisions of the
Code which may differ from generally accepted accounting principles, the basis
on which these financial statements are prepared. Accordingly, the amount of net
investment income and net realized gain reported on these financial statements
may differ from that reported on the Series' tax return and, consequently, the
character of distributions to shareholders reported in the financial highlights
may differ from that reported to shareholders on Form 1099-DIV.

The Series distinguishes between distributions on a tax basis and a financial
reporting basis and requires that only distributions in excess of tax basis
earnings and profits are reported in the financial statements as a tax return of
capital. Differences in the recognition or classification of income between the
financial statements and tax earnings and profits which result in temporary
over-distributions for financial statement purposes, are classified as
distributions in excess of net investment income or accumulated net realized
gains.

(3) Transactions with Affiliates
Investment Adviser - The Series has an investment advisory agreement with
Massachusetts Financial Services Company (MFS) to provide overall investment
advisory and administrative services, and general office facilities. The
management fee is computed daily and paid monthly at an annual rate of 0.50% of
average daily net assets. Under a temporary expense limitation agreement with
MFS, MFS has voluntarily agreed to pay all of the Series' operating expenses,
exclusive of management fees, which exceed 0.10% of the Series' average daily
net assets. The Series in turn will pay MFS an expense reimbursement fee not
greater than 0.10% of the Series' average daily net assets. To the extent that
the expense reimbursement fee exceeds the Series' actual expenses, the excess
will be applied to amounts paid by MFS in prior years. At December 31, 1996, the
aggregate unreimbursed expenses owed to MFS by the Series amounted to $71,807,
including $46,831 incurred in the current year.

The Series pays no compensation directly to its Trustees who are officers of the
investment adviser, or to officers of the Series, all of whom receive
remuneration for their services to the Series from MFS. Certain officers and
Trustees of the Series are officers or directors of MFS and MFS Service Center,
Inc. (MFSC).

Shareholder Servicing Agent - MFSC, a wholly owned subsidiary of MFS, earns a
fee for its services as shareholder servicing agent. The fee is calculated as a
percentage of the average daily net assets at an effective annual rate of up to
0.035%.

(4) Portfolio Securities
Purchases and sales of investments of money market investments, exclusive of
securities subject to repurchase agreements, consisted solely of U.S. government
securities and aggregated $5,046,308 and $4,591,485, respectively.

(5) Shares of Beneficial Interest
The Series' Declaration of Trust permits the Trustees to issue an unlimited
number of full and fractional shares of beneficial interest (without par value).

(6) Line of Credit
The Series entered into an agreement which enables it to participate with other
funds managed by MFS in an unsecured line of credit with a bank which permits
borrowings up to $350 million, collectively. Borrowings may be made to
temporarily finance the repurchase of Series shares. Interest is charged to each
fund, based on its borrowings, at a rate equal to the bank's base rate. In
addition, a commitment fee, based on the average daily unused portion of the
line of credit, is allocated among the participating funds at the end of each
quarter. The commitment fee allocated to the Series for the year ended December
31, 1996 was $2.
<PAGE>
INDEPENDENT AUDITORS' REPORT

To the Trustees of MFS Variable Insurance Trust and Shareholders of MFS Money
Market Series:

We have audited the accompanying statement of assets and liabilities, including
the portfolio of investments, of MFS Money Market Series (the Series) (one of
the series constituting the MFS Variable Insurance Trust) as of December 31,
1996, the related statement of operations for the year then ended, the
statements of changes in net assets and financial highlights for the year then
ended and for the period from January 3, 1995 (the commencement of investment
operations) to December 31, 1995. These financial statements and financial
highlights are the responsibility of the Series' management. Our responsibility
is to express an opinion on these financial statements and financial highlights
based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements and financial
highlights are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of the securities owned at
December 31, 1996 by correspondence with the custodian and brokers. An audit
also includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation. We believe that our audits provide a reasonable basis for our
opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of MFS Money Market
Series at December 31, 1996, the results of its operations, the changes in its
net assets, and its financial highlights for the respective stated periods in
conformity with generally accepted accounting principles.

DELOITTE & TOUCHE LLP

Boston, Massachusetts
February 7, 1997

                ---------------------------------------------
This report is prepared for the general information of shareholders. It is
authorized for distribution to prospective investors only when preceded or
accompanied by a current prospectus.
<PAGE>



                                                                 VMM-3 2/97 230

<PAGE>

                                  PART C


ITEM 24. (A) FINANCIAL STATEMENTS AND EXHIBITS

   
         ALL SERIES (EXCEPT MFS STRATEGIC FIXED INCOME SERIES)
    
         FINANCIAL STATEMENTS INCLUDED IN PARTS A AND B:

         INCLUDED IN PART A OF THIS REGISTRATION STATEMENT:
          Financial Highlights for:
   
          the MFS Emerging Growth Series for the period from commencement 
          of investment operations on July 24, 1995 to December 31, 1996;

          the MFS Value Series and the MFS Limited Maturity Series for the 
          period from commencement of investment operations on August 14, 
          1996 to December 31, 1996;

          the MFS Research Series and the MFS High Income Series for the 
          period from commencement of investment operations on July 26, 1995 
          to December 31, 1996;
    
          the MFS Total Return Series, the MFS Utilities Series and the MFS 
          Money Market Series for the period from commencement of investment 
          operations on January 3, 1995 to December 31, 1996;

          the MFS Growth With Income Series for the period from 
          commencement of investment operations on October 9, 1995 to 
          December 31, 1996; 

   
          the MFS World Governments Series for the period from commencement 
          of investment operations on June 14, 1994 to December 31, 1996; and
    

          the MFS Bond Series for the period from commencement of 
          investment operations on October 24, 1995 to December 31, 1996.

         INCLUDED IN PART B OF THIS REGISTRATION STATEMENT:

          At December 31, 1996:
               Portfolio of Investments*
               Statement of Assets and Liabilities*

          For the year ended December 31, 1996:
               Statement of Operations*
<PAGE>

          For the two years in the period ended December 31, 1996:
               Statement of Changes in Net Assets*

          Statement of Operations* and Statement of Changes in Net Assets* for:
   
          the MFS Emerging Growth Series for the period from commencement 
          of investment operations on July 24, 1995 to December 31, 1996;

          the MFS Value Series and the MFS Limited Maturity Series for the 
          period from commencement of investment operations on August 14, 
          1996 to December 31, 1996;

          the MFS Research Series and the MFS High Income Series for the 
          period from commencement of investment operations on July 26, 
          1995 to December 31, 1996;

          the MFS Growth With Income Series for the period from 
          commencement of investment operations on October 9, 1995 to 
          December 31, 1996; 

    

          the MFS Total Return Series, the MFS Utilities Series and the MFS 
          Money Market Series for the period from commencement of investment 
          operations on January 3, 1995 to December 31, 1996; 

          the MFS World Governments Series for the two years in the period 
          ended December 31, 1996; and

   
          the MFS Bond Series for the period from commencement of 
          investment operations on October 24, 1995 to December 31, 1996.
    

<PAGE>

         MFS STRATEGIC FIXED INCOME SERIES

          FINANCIAL STATEMENTS INCLUDED IN PARTS A AND B:

          INCLUDED IN PART A OF THIS REGISTRATION STATEMENT:
           None

         INCLUDED IN PART B OF THIS REGISTRATION STATEMENT:

          At December 31, 1996:
                Statement of Assets and Liabilities
                Opinion of Independent Auditors
________________________
*  Incorporated by reference to the Annual Reports to Shareholders of the
   Series (with the exception of the MFS Strategic Fixed Income Series), 
   each dated December 31, 1996, filed with the SEC via EDGAR on March 4, 
   1997.

         (B) EXHIBITS
   
               1 (a) Declaration of Trust, dated January 28, 1994. (3)

                 (b) Amendment to Declaration of Trust - Designation of 
                     Series of Shares dated January 31, 1994. (3)

                 (c) Amendment to Declaration of Trust - Redesignation of 
                     Series, dated June 1, 1995. (3)

                 (d) Amendment to Declaration of Trust - Redesignation of 
                     Series, dated April 25, 1996. (4)

               2     By-Laws, dated January 28, 1994. (3)

               3     Not Applicable.

               4     Not Applicable.

               5     Investment Advisory Agreement by and between Registrant 
                     and Massachusetts Financial Services Company, dated 
                     April 14, 1994. (3)

               6     Distribution Agreement between Registrant and 
                     Massachusetts Investors Services, Inc., dated April 14, 
                     1994. (3)

    
<PAGE>

   
               7      Not Applicable.

               8      Custodian Agreement between Registrant and Investors 
                      Bank & Trust Company, dated April 14, 1994.  (3)
               9 (a)  Shareholder Servicing Agent Agreement between Registrant 
                      and MFS Service Center, dated April 14, 1994.  (3)

                 (b)  Dividend Disbursing Agency Agreement between Registrant 
                      and State Street Bank and Trust, dated April 14, 1994. (3)

                 (c)  Loan Agreement among MFS Borrowers and The First National
                      Bank of Boston, dated as of February 21, 1995 (2)

                 (d)  Master Administrative Services Agreement, dated March 1, 
                      1997. (5)
    

              10      Opinion and Consent of Counsel filed with Registrant's 
                      Rule 24f-2 Notice for fiscal year ended December 31, 
                      1996 on February 28, 1997.

              11      Consent of Deloitte & Touche LLP; filed herewith.

              12      Not Applicable.

   
              13      Investment Representation Letter.  (3)
    

              14       Not Applicable.

              15       Not Applicable.

              16       Schedule of Computation for Performance Quotations - 
                       Average Annual Total Rate of Return, Aggregate Total 
                       Rate of Return and Standardized Yield. (1)

              17       Financial Data Schedule for each operational Series 
                       of the Trust; filed herewith.

              18       Not Applicable.
   
              Power of Attorney dated August 12, 1994. (2)
    
____________________________
   
   (1) Incorporated by reference to MFS Municipal Series Trust (File 
       Nos. 2-92915 and 811-4096) Post-Effective Amendment No. 26 filed 
       with the SEC via EDGAR on February 22, 1995.

   (2) Incorporated by reference to Amendment No. 8 on Form N-2 for MFS 
       Municipal Income Trust (File No. 811-4841) filed with the SEC via 
       EDGAR on February 28, 1995.

   (3) Incorporated by reference to Registrant's Post-Effective Amendment 
       No. 4 filed with the SEC via EDGAR on October 26, 1995.

   (4) Incorporated by reference to Registrant's Post-Effective Amendment 
       No. 6 filed with the SEC via EDGAR on May 30, 1996.

   (5) Incorporated by reference to MFS/Sun Life Series Trust (File 
       Nos. 2-83616 and 811-3732) Post-Effective Amendment No. 19 filed 
       with the SEC via EDGAR on March 18, 1997. 
    

<PAGE>

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

         Not applicable.

ITEM 26. NUMBER OF HOLDERS OF SECURITIES

         MFS EMERGING GROWTH SERIES
   
              (1)                                       (2)
         TITLE OF CLASS                      NUMBER OF RECORD HOLDERS

         Shares of Beneficial Interest                   34
           (without par value)                (as of March 31, 1997)

         MFS VALUE SERIES

              (1)                                        (2)
         TITLE OF CLASS                      NUMBER OF RECORD HOLDERS

         Shares of Beneficial Interest                   10
             (without par value)              (as of March 31, 1997)

         MFS RESEARCH SERIES

              (1)                                        (2)
         TITLE OF CLASS                      NUMBER OF RECORD HOLDERS

         Shares of Beneficial Interest                   24
             (without par value)              (as of March 31, 1997)

         MFS GROWTH WITH INCOME SERIES

              (1)                                        (2)
         TITLE OF CLASS                       NUMBER OF RECORD HOLDERS

         Shares of Beneficial Interest                   13
            (without par value)                (as of March 31, 1997)

         MFS TOTAL RETURN SERIES

               (1)                                       (2)
         TITLE OF CLASS                       NUMBER OF RECORD HOLDERS

         Shares of Beneficial Interest                    22
            (without par value)                (as of March 31, 1997)
    
<PAGE>
   
         MFS UTILITIES SERIES

               (1)                                       (2)
         TITLE OF CLASS                        NUMBER OF RECORD HOLDERS

         Shares of Beneficial Interest                    15
            (without par value)                 (as of March 31, 1997)

         MFS HIGH INCOME SERIES

               (1)                                       (2)
         TITLE OF CLASS                        NUMBER OF RECORD HOLDERS

         Shares of Beneficial Interest                    11
            (without par value)                  (as of March 31, 1997)

         MFS WORLD GOVERNMENTS SERIES

                (1)                                       (2)
         TITLE OF CLASS                         NUMBER OF RECORD HOLDERS

         Shares of Beneficial Interest                     23
            (without par value)                   (as of March 31, 1997)

         MFS STRATEGIC FIXED INCOME SERIES

                 (1)                                       (2)
         TITLE OF CLASS                         NUMBER OF RECORD HOLDERS

         Shares of Beneficial Interest                      4
            (without par value)                  (as of March 31, 1997)

         MFS BOND SERIES

                 (1)                                        (2)
         TITLE OF CLASS                         NUMBER OF RECORD HOLDERS

         Shares of Beneficial Interest                       10
            (without par value)                  (as of March 31, 1997)

         MFS LIMITED MATURITY SERIES

                (1)                                        (2)
         TITLE OF CLASS                         NUMBER OF RECORD HOLDERS

         Shares of Beneficial Interest                      9
            (without par value)                  (as of March 31, 1997)
    
<PAGE>
   
         MFS MONEY MARKET SERIES

               (1)                                          (2)
         TITLE OF CLASS                         NUMBER OF RECORD HOLDERS

         Shares of Beneficial Interest                       8
            (without par value)                  (as of March 31, 1997)
    

ITEM 27. INDEMNIFICATION

    Reference is hereby made to (a) Section 5.3 of the Registrant's 
Declaration of Trust; and (b) Section 9 of the Shareholder Servicing Agent 
Agreement between the Registrant and MFS Service Center, Inc.

    The Trustees and officers of the Registrant and the personnel of the 
Registrant's investment adviser and distributor will be insured as of the 
effective date of this Registration Statement under an errors and omissions 
liability insurance policy.  The Registrant and its officers are also insured 
under the fidelity bond required by Rule 17g-1 under the Investment Company 
Act of 1940, as amended.

ITEM 28. BUSINESS AND OTHER CONNECTIONS OF INVESTMENT ADVISER

    MFS serves as investment adviser to the following open-end Funds 
comprising the MFS Family of Funds:  Massachusetts Investors Trust, 
Massachusetts Investors Growth Stock Fund, MFS Growth Opportunities Fund, MFS 
Government Securities Fund, MFS Government Limited Maturity Fund, MFS Series 
Trust I (which has eight series: MFS Managed Sectors Fund, MFS Cash Reserve 
Fund, MFS World Asset Allocation Fund, MFS Aggressive Growth Fund, MFS 
Research Growth and Income Fund, MFS Core Growth Fund, MFS Equity Income Fund 
and MFS Special Opportunities Fund), MFS Series Trust II (which has four 
series: MFS Emerging Growth Fund, MFS Capital Growth Fund, MFS Intermediate 
Income Fund and MFS Gold & Natural Resources Fund), MFS Series Trust III 
(which has two series: MFS High Income Fund and MFS Municipal High Income 
Fund), MFS Series Trust IV (which has four series: MFS Money Market Fund, MFS 
Government Money Market Fund, MFS Municipal Bond Fund and MFS OTC Fund), MFS 
Series Trust V (which has two series: MFS Total Return Fund and MFS Research 
Fund), MFS Series Trust VI (which has three series: MFS World Total Return 
Fund, MFS Utilities Fund and MFS World Equity Fund), MFS Series Trust VII 
(which has two series: MFS World Governments Fund and MFS Value Fund), MFS 
Series Trust VIII (which has two series: MFS Strategic Income Fund and MFS 
World Growth Fund), MFS Series Trust IX (which has three series: MFS Bond 
Fund, MFS Limited Maturity Fund and MFS Municipal Limited Maturity Fund), MFS 
Series Trust X (which has four series:  MFS Government Mortgage Fund, 
MFS/Foreign & Colonial Emerging Markets Equity Fund, MFS/Foreign & Colonial 
International Growth Fund and MFS/Foreign & Colonial International Growth and 
Income Fund), and MFS Municipal Series Trust (which has 16 series: MFS 
Alabama Municipal Bond Fund, MFS Arkansas Municipal Bond Fund, MFS California 
Municipal Bond Fund, MFS Florida Municipal Bond Fund, MFS Georgia Municipal 
Bond Fund, MFS Maryland Municipal Bond Fund, MFS Massachusetts Municipal Bond 
Fund, MFS Mississippi Municipal Bond Fund, MFS New York Municipal Bond Fund, 
MFS North Carolina Municipal Bond Fund,

<PAGE>

    MFS Pennsylvania Municipal Bond Fund, MFS South Carolina Municipal Bond 
Fund, MFS Tennessee Municipal Bond Fund, MFS Virginia Municipal Bond Fund, 
MFS West Virginia Municipal Bond Fund and MFS Municipal Income Fund) (the 
"MFS Funds").  The principal business address of each of the aforementioned 
Funds is 500 Boylston Street, Boston, Massachusetts 02116.

    MFS also serves as investment adviser of the following no-load, open-end 
Funds:  MFS Institutional Trust ("MFSIT") (which has seven series), MFS 
Variable Insurance Trust ("MVI") (which has twelve series) and MFS Union 
Standard Trust ("UST") (which has two series).  The principal business 
address of each of the aforementioned Funds is 500 Boylston Street, Boston, 
Massachusetts 02116.

    In addition, MFS serves as investment adviser to the following closed-end 
Funds:  MFS Municipal Income Trust, MFS Multimarket Income Trust, MFS 
Government Markets Income Trust, MFS Intermediate Income Trust, MFS Charter 
Income Trust and MFS Special Value Trust (the "MFS Closed-End Funds").  The 
principal business address of each of the aforementioned Funds is 500 
Boylston Street, Boston, Massachusetts 02116.

    Lastly, MFS serves as investment adviser to MFS/Sun Life Series Trust 
("MFS/SL"), Sun Growth Variable Annuity Funds, Inc. ("SGVAF"), Money Market 
Variable Account, High Yield Variable Account, Capital Appreciation Variable 
Account, Government Securities Variable Account, World Governments Variable 
Account, Total Return Variable Account and Managed Sectors Variable Account.  
The principal business address of each is One Sun Life Executive Park, 
Wellesley Hills, Massachusetts 02181.

    MFS International Ltd. ("MIL"), a limited liability company organized 
under the laws of the Republic of Ireland and a subsidiary of MFS, whose 
principal business address is 41-45 St. Stephen's Green, Dublin 2, Ireland, 
serves as investment adviser to and distributor for MFS International Fund 
(which has four portfolios: MFS International Funds-U.S. Equity Fund, MFS 
International Funds-U.S. Emerging Growth Fund, MFS International Funds-Global 
Governments Fund, MFS International Funds - U.S. Dollar Reserve Fund and MFS 
International Funds-Charter Income Fund) (the "MIL Funds").  The MIL Funds 
are organized in Luxembourg and qualify as an undertaking for collective 
investments in transferable securities (UCITS).  The principal business 
address of the MIL Funds is 47, Boulevard Royal, L-2449 Luxembourg.

    MIL also serves as investment adviser to and distributor for MFS Meridian 
U.S. Government Bond Fund, MFS Meridian Charter Income Fund, MFS Meridian 
Global Government Fund, MFS Meridian U.S. Emerging Growth Fund, MFS Meridian 
Global Equity Fund, MFS Meridian Limited Maturity Fund, MFS Meridian World 
Growth Fund, MFS Meridian Money Market Fund, MFS Meridian World Total Return 
Fund, MFS Meridian U.S. Equity Fund and MFS Meridian Research Fund 
(collectively the "MFS Meridian Funds").  Each of the MFS Meridian Funds is 
organized as an exempt company under the laws of the Cayman Islands.  The 
principal business address of each of the MFS Meridian Funds is P.O. Box 309, 
Grand Cayman, Cayman Islands, British West Indies.

<PAGE>

    MFS International (U.K.) Ltd. ("MIL-UK"), a private limited company 
registered with the Registrar of Companies for England and Wales whose 
current address is 4 John Carpenter Street, London, England ED4Y 0NH, is 
involved primarily in marketing and investment research activities with 
respect to private clients and the MIL Funds and the MFS Meridian Funds.

    MFS Fund Distributors, Inc. ("MFD"), a wholly owned subsidiary of MFS, 
serves as distributor for the MFS Funds, MVI, UST and MFSIT.

    Clarendon Insurance Agency, Inc. ("CIAI"), a wholly owned subsidiary of 
MFS, serves as distributor for certain life insurance and annuity contracts 
issued by Sun Life Assurance Company of Canada (U.S.). 

    MFS Service Center, Inc. ("MFSC"), a wholly owned subsidiary of MFS, 
serves as shareholder servicing agent to the MFS Funds, the MFS Closed-End 
Funds, MFSIT, MVI and UST.

    MFS Asset Management, Inc. ("AMI"), a wholly owned subsidiary of MFS, 
provides investment advice to substantial private clients.

    MFS Retirement Services, Inc. ("RSI"), a wholly owned subsidiary of MFS, 
markets MFS products to retirement plans and provides administrative and 
record keeping services for retirement plans.

    MFS

    The Directors of MFS are A. Keith Brodkin, Jeffrey L. Shames, Arnold D. 
Scott, John R. Gardner and John D. McNeil.  Mr. Brodkin is the Chairman, Mr. 
Shames is the President, Mr. Scott is a Senior Executive Vice President and 
Secretary, Bruce C. Avery, William S. Harris, William W. Scott, Jr., and 
Patricia A. Zlotin are Executive Vice Presidents, Stephen E. Cavan is a 
Senior Vice President, General Counsel and an Assistant Secretary, Joseph W. 
Dello Russo is a Senior Vice President, Chief Financial Officer and 
Treasurer, Robert T. Burns is a Vice President, Associate General Counsel and 
an Assistant Secretary of MFS, and Thomas B. Hastings is a Vice President and 
Assistant Treasurer.

        MASSACHUSETTS INVESTORS TRUST
        MASSACHUSETTS INVESTORS GROWTH STOCK FUND
        MFS GROWTH OPPORTUNITIES FUND
        MFS GOVERNMENT SECURITIES FUND
        MFS SERIES TRUST I
        MFS SERIES TRUST V
        MFS SERIES TRUST VI
        MFS SERIES TRUST X
        MFS GOVERNMENT LIMITED MATURITY FUND

<PAGE>

    A. Keith Brodkin is the Chairman and President, Stephen E. Cavan is the 
Secretary, W. Thomas London is the Treasurer, James O. Yost, Vice President 
of MFS, is the Assistant Treasurer, James R. Bordewick, Jr., Vice President 
and Associate General Counsel of MFS, is the Assistant Secretary.

    MFS SERIES TRUST II

    A. Keith Brodkin is the Chairman and President, Leslie J. Nanberg, Senior 
Vice President of MFS, is a Vice President, Stephen E. Cavan is the 
Secretary, W. Thomas London is the Treasurer, James O. Yost is the Assistant 
Treasurer, and James R. Bordewick, Jr., is the Assistant Secretary.

    MFS GOVERNMENT MARKETS INCOME TRUST
    MFS INTERMEDIATE INCOME TRUST

    A. Keith Brodkin is the Chairman and President, Patricia A. Zlotin, 
Executive Vice President of MFS and Leslie J. Nanberg, Senior Vice President 
of MFS, are Vice Presidents, Stephen E. Cavan is the Secretary, W. Thomas 
London is the Treasurer, James O. Yost is the Assistant Treasurer, and James 
R. Bordewick, Jr., is the Assistant Secretary.

    MFS SERIES TRUST III

    A. Keith Brodkin is the Chairman and President, James T. Swanson, Robert 
J. Manning, Cynthia M. Brown and Joan S. Batchelder, Senior Vice Presidents 
of MFS, Bernard Scozzafava, Vice President of MFS, and Matthew Fontaine, 
Assistant Vice President of MFS, are Vice Presidents, Sheila Burns-Magnan and 
Daniel E. McManus, Assistant Vice Presidents of MFS, are Assistant Vice 
Presidents, Stephen E. Cavan is the Secretary, W. Thomas London is the 
Treasurer, James O. Yost is the Assistant Treasurer, and James R. Bordewick, 
Jr., is the Assistant Secretary.

    MFS SERIES TRUST IV
    MFS SERIES TRUST IX

A. Keith Brodkin is the Chairman and President, Robert A. Dennis and Geoffrey 
L. Kurinsky, Senior Vice Presidents of MFS, are Vice Presidents, Stephen E. 
Cavan is the Secretary, W. Thomas London is the Treasurer, James O. Yost is 
the Assistant Treasurer and James R. Bordewick, Jr., is the Assistant 
Secretary.

    MFS SERIES TRUST VII

    A. Keith Brodkin is the Chairman and President, Leslie J. Nanberg and 
Stephen C. Bryant, Senior Vice Presidents of MFS, are Vice Presidents, 
Stephen E. Cavan is the Secretary, W. Thomas London is the Treasurer, James 
O. Yost is the Assistant Treasurer and James R. Bordewick, Jr., is the 
Assistant Secretary.

<PAGE>

    MFS SERIES TRUST VIII

    A. Keith Brodkin is the Chairman and President, Jeffrey L. Shames, Leslie 
J. Nanberg, Patricia A. Zlotin, James T. Swanson and John D. Laupheimer, Jr., 
Vice President of MFS, are Vice Presidents, Stephen E. Cavan is the 
Secretary, W. Thomas London is the Treasurer, James O. Yost is the Assistant 
Treasurer and James R. Bordewick, Jr., is the Assistant Secretary.

    MFS MUNICIPAL SERIES TRUST

    A. Keith Brodkin is the Chairman and President, Cynthia M. Brown and 
Robert A. Dennis are Vice Presidents, David B. Smith, Geoffrey L. Schechter 
and David R. King, Vice Presidents of MFS, are Vice Presidents, Daniel E. 
McManus, Assistant Vice President of MFS, is an Assistant Vice President, 
Stephen E. Cavan is the Secretary, W. Thomas London is the Treasurer, James 
O. Yost is the Assistant Treasurer and James R. Bordewick, Jr., is the 
Assistant Secretary.

    MFS VARIABLE INSURANCE TRUST
    MFS UNION STANDARD TRUST
    MFS INSTITUTIONAL TRUST

    A. Keith Brodkin is the Chairman and President, Stephen E. Cavan is the 
Secretary, W. Thomas London is the Treasurer, James O. Yost is the Assistant 
Treasurer and James R. Bordewick, Jr., is the Assistant Secretary.

    MFS MUNICIPAL INCOME TRUST

    A. Keith Brodkin is the Chairman and President, Cynthia M. Brown and 
Robert J. Manning are Vice Presidents, Stephen E. Cavan is the Secretary, W. 
Thomas London is the Treasurer, James O. Yost, is the Assistant Treasurer and 
James R. Bordewick, Jr., is the Assistant Secretary.

    MFS MULTIMARKET INCOME TRUST
    MFS CHARTER INCOME TRUST

    A. Keith Brodkin is the Chairman and President, Patricia A. Zlotin, 
Leslie J. Nanberg and James T. Swanson are Vice Presidents, Stephen E. Cavan 
is the Secretary, W. Thomas London is the Treasurer, James O. Yost, Vice 
President of MFS, is the Assistant Treasurer and James R. Bordewick, Jr., is 
the Assistant Secretary.

    MFS SPECIAL VALUE TRUST

    A. Keith Brodkin is the Chairman and President, Jeffrey L. Shames, 
Patricia A. Zlotin and Robert J. Manning are Vice Presidents, Stephen E. 
Cavan is the Secretary, W. Thomas London is the Treasurer, and James O. Yost, 
is the Assistant Treasurer and James R. Bordewick, Jr., is the Assistant 
Secretary.

<PAGE>

    SGVAF

    W. Thomas London is the Treasurer.

    MIL

    A. Keith Brodkin is a Director and the Chairman, Arnold D. Scott and 
Jeffrey L. Shames are Directors, Ziad Malek, Senior Vice President of MFS, is 
the President, Thomas J. Cashman, Jr., a Senior Vice President of MFS, is a 
Senior Vice President, Stephen E. Cavan is a Director, Senior Vice President 
and the Clerk, James R. Bordewick, Jr. is a Director, Vice President and an 
Assistant Clerk, Robert T. Burns is an Assistant Clerk, Joseph W. Dello Russo 
is the Treasurer and Thomas B. Hastings is the Assistant Treasurer.

    MIL-UK

    A. Keith Brodkin is a Director and the Chairman, Arnold D. Scott, Jeffrey 
L. Shames, and James R. Bordewick, Jr., are Directors, Stephen E. Cavan is a 
Director and the Secretary, Ziad Malek is the President, James E. Russell is 
the Treasurer, and Robert T. Burns is the Assistant Secretary.

    MIL FUNDS

    A. Keith Brodkin is the Chairman, President and a Director, Richard B. 
Bailey, John A. Brindle, Richard W. S. Baker and William F. Waters are 
Directors, Stephen E. Cavan is the Secretary, W. Thomas London is the 
Treasurer, James O. Yost is the Assistant Treasurer and James R. Bordewick, 
Jr., is the Assistant Secretary, and Ziad Malek is a Senior Vice President.

    MFS MERIDIAN FUNDS

    A. Keith Brodkin is the Chairman, President and a Director, Richard B. 
Bailey, John A. Brindle, Richard W. S. Baker, Arnold D. Scott, Jeffrey L. 
Shames and William F. Waters are Directors, Stephen E. Cavan is the 
Secretary, W. Thomas London is the Treasurer, James R. Bordewick, Jr., is the 
Assistant Secretary, James O. Yost is the Assistant Treasurer, and Ziad Malek 
is a Senior Vice President.

    MFD

    A. Keith Brodkin is the Chairman and a Director, Arnold D. Scott and 
Jeffrey L. Shames are Directors, William W. Scott, Jr., an Executive Vice 
President of MFS, is the President, Stephen E. Cavan is the Secretary, Robert 
T. Burns is the Assistant Secretary, Joseph W. Dello Russo is the Treasurer, 
and Thomas B. Hastings is the Assistant Treasurer.

    CIAI

    A. Keith Brodkin is the Chairman and a Director, Arnold D. Scott and 
Jeffrey L. Shames are Directors, Cynthia Orcott is President, Bruce C. Avery 
is the Vice President, Joseph

<PAGE>

W. Dello Russo is the Treasurer, Thomas B. Hastings is the Assistant 
Treasurer, Stephen E. Cavan is the Secretary, and Robert T. Burns is the 
Assistant Secretary.

    MFSC

    A. Keith Brodkin is the Chairman and a Director, Arnold D. Scott and 
Jeffrey L. Shames are Directors, Joseph A. Recomendes, a Senior Vice 
President of MFS, is Vice Chairman and a Director, Janet A. Clifford is the 
Executive Vice President, Joseph W. Dello Russo is the Treasurer, Thomas B. 
Hastings is the Assistant Treasurer, Stephen E. Cavan is the Secretary, and 
Robert T. Burns is the Assistant Secretary.

    AMI

    A. Keith Brodkin is the Chairman and a Director, Jeffrey L. Shames, and 
Arnold D. Scott are Directors, Thomas J. Cashman, Jr., is the President and a 
Director, Leslie J. Nanberg is a Senior Vice President, a Managing Director 
and a Director, George F. Bennett, Carol A. Corley, John A. Gee, Brianne 
Grady and Kevin R. Parke  are Senior Vice Presidents and Managing Directors, 
Joseph W. Dello Russo is the Treasurer, Thomas B. Hastings is the Assistant 
Treasurer and Robert T. Burns is the Secretary.

    RSI

    William W. Scott, Jr. and Bruce C. Avery are Directors, Arnold D. Scott 
is the Chairman and a Director, Joseph W. Dello Russo is the Treasurer, 
Thomas B. Hastings is the Assistant Treasurer, Stephen E. Cavan is the 
Secretary, Robert T. Burns is the Assistant Secretary and Sharon A. Brovelli 
and Martin E. Beaulieu are Senior Vice Presidents.

    In addition, the following persons, Directors or officers of MFS, have 
the affiliations indicated:

    A. Keith Brodkin           Director, Sun Life Assurance Company of 
                                Canada (U.S.), One Sun Life Executive Park, 
                                Wellesley Hills, Massachusetts
                               Director, Sun Life Insurance and Annuity 
                                Company of New York, 67 Broad Street, 
                                New York, New York

    John R. Gardner            President and a Director, Sun Life Assurance 
                                Company of Canada, Sun Life Centre, 150 
                                King Street West, Toronto, Ontario, Canada 
                                (Mr. Gardner is also an officer and/or 
                                Director of various subsidiaries and 
                                affiliates of Sun Life)

<PAGE>

    John D. McNeil             Chairman, Sun Life Assurance Company of 
                                Canada, Sun Life Centre, 150 King Street 
                                West, Toronto, Ontario, Canada (Mr. McNeil 
                                is also an officer and/or Director of 
                                various subsidiaries and affiliates of 
                                Sun Life)

    Joseph W. Dello Russo      Director of Mutual Fund Operations, The Boston 
                                Company, Exchange Place, Boston, 
                                Massachusetts (until August, 1994)


ITEM 29. DISTRIBUTORS

         (a)  Reference is hereby made to Item 28 above.

         (b)  Reference is hereby made to Item 28 above; the principal 
business address of each of these persons is 500 Boylston Street, Boston, 
Massachusetts 02116.

         (c)  Not applicable.

ITEM 30. LOCATION OF ACCOUNTS AND RECORDS

    The accounts and records of the Registrant are located, in whole or in 
part, at the office of the Registrant and the following locations:

                  NAME                            ADDRESS
                  ----                            -------

   Massachusetts Financial Services               500 Boylston Street
    Company (investment adviser)                  Boston, MA  02116

   MFS Fund Distributors, Inc.                    500 Boylston Street
    (distributor)                                 Boston, MA  02116

   Investors Bank & Trust                         89 South Street
    Company (custodian)                           Boston, MA  02111

   MFS Service Center, Inc.                       500 Boylston Street
    (transfer agent)                              Boston, MA  02116

    The Registrant's corporate documents are kept by the Registrant at its 
offices.  Portfolio brokerage orders, other purchase orders, reasons for 
brokerage allocation and lists of persons authorized to transact business for 
the Registrant are kept by Massachusetts Financial Services Company at 500 
Boylston Street, Boston, Massachusetts 02116.  Shareholder account records 
are kept by MFS Service Center, Inc. at 500 Boylston Street, Boston, 
Massachusetts 02116.  Transaction journals, receipts for the acceptance and 
delivery of securities and cash, ledgers and trial balances are kept by 
Investors Bank & Trust Company, 89 South Street, Boston, MA  02111.

<PAGE>

ITEM 31. MANAGEMENT SERVICES

         Not applicable.

ITEM 32. UNDERTAKINGS

         (a) Not applicable.

         (b) Not Applicable.

         (c) Registrant undertakes to furnish each person to whom a 
prospectus is delivered with a copy of its latest annual report to 
shareholders upon request and without charge.

         (d) Insofar as indemnification for liability arising under the 
Securities Act of 1933 may be permitted to trustees, officers and controlling 
persons of the Registrant pursuant to the provisions set forth in Item 27 of 
this Part C, or otherwise, the Registrant has been advised that in the 
opinion of the Securities and Exchange Commission such indemnification is 
against public policy as expressed in the Act and is, therefore, 
unenforceable.  In the event that a claim for indemnification against such 
liabilities (other than the payment by the Registrant of expenses incurred or 
paid by a trustee, officer or controlling person of the Registrant in the 
successful defense of any action, suit or proceeding) is asserted by such 
director, officer or controlling person in connection with the Securities 
being Registered, the Registrant will, unless in the opinion of its counsel 
the matter has been settled by controlling precedent, submit to a court of 
appropriate jurisdiction the question whether such indemnification by it is 
against public policy as expressed in the Act and will be governed by the 
final adjudication of such issue.

<PAGE>

                                SIGNATURES

    Pursuant to the requirements of the Securities Act of 1933 and the 
Investment Company Act of 1940, the Registrant certifies that it meets all of 
the requirements for effectiveness of this Registration Statement pursuant to 
Rule 485(b) under the Securities Act of 1933 and has duly caused this 
Post-Effective Amendment to the Registration Statement to be signed on its 
behalf by the undersigned, thereto duly authorized, in the City of Boston and 
The Commonwealth of Massachusetts on the 25th day of April, 1997.

                                       MFS VARIABLE INSURANCE
                                        TRUST


                                       By: JAMES R. BORDEWICK, JR.
                                           -----------------------
                                       Name:  James R. Bordewick, Jr.
                                       Title: Assistant Secretary


    Pursuant to the requirements of the Securities Act of 1933, this 
Post-Effective Amendment to its Registration Statement has been signed below 
by the following persons in the capacities indicated on April 25, 1997.

        SIGNATURE                                 TITLE
        ---------                                 -----

A. KEITH BRODKIN*                     Chairman, President (Principal
- -----------------                      Executive Officer) and Trustee
A. Keith Brodkin


W. THOMAS LONDON*                     Treasurer (Principal Financial Officer
- -----------------                      and Principal Accounting Officer)
W. Thomas London


WILLIAM R. GUTOW*                     Trustee
- -----------------
William R. Gutow

<PAGE>


NELSON J. DARLING, JR.*               Trustee
- -----------------------
Nelson J. Darling, Jr.



                                      *By: JAMES R. BORDEWICK, JR.
                                           -----------------------
                                       Name:  James R. Bordewick, Jr.
                                                as Attorney-in-fact

                                    Executed by James R. Bordewick, Jr. on
                                    behalf of those indicated pursuant
                                    to a Power of Attorney dated 
                                    August 12, 1994, incorporated by 
                                    reference to the Registrant's 
                                    Post-Effective Amendment No. 4 
                                    filed with the Securities and Exchange 
                                    Commission on October 26, 1995.


<PAGE>

                                  INDEX TO EXHIBITS


EXHIBIT NO.            DESCRIPTION OF EXHIBIT                    PAGE NO.
- -----------            ----------------------                    --------

   11          Consent of Deloitte & Touche LLP.

   17          Financial Data Schedules for each Series of 
                the Trust.


<PAGE>

                                                           EXHIBIT 99.11


                         INDEPENDENT AUDITORS' CONSENT

    We consent to the incorporation by reference in this Post-Effective 
Amendment No. 7 to the Registration Statement (File No. 33-74668) of MFS 
Variable Insurance Trust of our reports, each dated February 7, 1997, 
appearing in the annual reports to shareholders of MFS Emerging Growth 
Series, MFS Value Series, MFS Research Series, MFS Growth With Income Series, 
MFS Total Return Series, MFS Utilities Series, MFS High Income Series, MFS 
World Governments Series, MFS Bond Series, MFS Limited Maturity Series and 
MFS Money Market Series, for the year ended December 31, 1996, and to the 
inclusion in such Registration Statement of our report dated February 7, 1997 
relating to the statement of assets and liabilities of MFS Strategic Fixed 
Income Series as of December 31, 1996.  We also consent to the references to 
us under the headings "Condensed Financial Information" in the Prospectus and 
"Independent Auditors and Financial Statements" in the Statement of 
Additional Information, both of which are part of such Registration Statement.

DELOITTE & TOUCHE LLP


Boston, Massachusetts
April 28, 1997


<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<CIK> 0000918571
<NAME> MFS VARIABLE INSURANCE TRUST
<SERIES>
   <NUMBER> 07
   <NAME> MFS EMERGING GROWTH SERIES
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               DEC-31-1996
<INVESTMENTS-AT-COST>                        115931082
<INVESTMENTS-AT-VALUE>                       117914932
<RECEIVABLES>                                  1370425
<ASSETS-OTHER>                                    6588
<OTHER-ITEMS-ASSETS>                              6202
<TOTAL-ASSETS>                               119298147
<PAYABLE-FOR-SECURITIES>                      13706027
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       635816
<TOTAL-LIABILITIES>                           14341843
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                     103393432
<SHARES-COMMON-STOCK>                          7928680
<SHARES-COMMON-PRIOR>                           339022
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                      (420978)
<ACCUM-APPREC-OR-DEPREC>                       1983850
<NET-ASSETS>                                 104956304
<DIVIDEND-INCOME>                                37634
<INTEREST-INCOME>                               351048
<OTHER-INCOME>                                  (1125)
<EXPENSES-NET>                                (419015)
<NET-INVESTMENT-INCOME>                        (31458)
<REALIZED-GAINS-CURRENT>                        503597
<APPREC-INCREASE-CURRENT>                      1810131
<NET-CHANGE-FROM-OPS>                          2282270
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                      (887940)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                       11363299
<NUMBER-OF-SHARES-REDEEMED>                    3839801
<SHARES-REINVESTED>                              66160
<NET-CHANGE-IN-ASSETS>                       101087674
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           314262
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 483097
<AVERAGE-NET-ASSETS>                          42147857
<PER-SHARE-NAV-BEGIN>                            11.41
<PER-SHARE-NII>                                 (0.01)
<PER-SHARE-GAIN-APPREC>                           1.95
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                       (0.11)
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                              13.24
<EXPENSE-RATIO>                                   1.00
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                              0.00
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<CIK> 0000918571
<NAME> MFS VARIABLE INSURANCE TRUST
<SERIES>
   <NUMBER> 06
   <NAME> MFS VALUE SERIES
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               DEC-31-1996
<INVESTMENTS-AT-COST>                          1261317
<INVESTMENTS-AT-VALUE>                         1334447
<RECEIVABLES>                                    11748
<ASSETS-OTHER>                                    8499
<OTHER-ITEMS-ASSETS>                              3534
<TOTAL-ASSETS>                                 1358228
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                         6973
<TOTAL-LIABILITIES>                               6973
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       1279148
<SHARES-COMMON-STOCK>                           126723
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                        (1028)
<ACCUM-APPREC-OR-DEPREC>                         73135
<NET-ASSETS>                                   1351255
<DIVIDEND-INCOME>                                 5551
<INTEREST-INCOME>                                 1833
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                  (4260)
<NET-INVESTMENT-INCOME>                           3123
<REALIZED-GAINS-CURRENT>                         18540
<APPREC-INCREASE-CURRENT>                        73135
<NET-CHANGE-FROM-OPS>                            94798
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                       (3068)
<DISTRIBUTIONS-OF-GAINS>                       (19623)
<DISTRIBUTIONS-OTHER>                           (3853)
<NUMBER-OF-SHARES-SOLD>                         123715
<NUMBER-OF-SHARES-REDEEMED>                      (358)
<SHARES-REINVESTED>                               2506
<NET-CHANGE-IN-ASSETS>                         1342655
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                             3196
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                  16423
<AVERAGE-NET-ASSETS>                            435527
<PER-SHARE-NAV-BEGIN>                            10.00
<PER-SHARE-NII>                                   0.07
<PER-SHARE-GAIN-APPREC>                           0.88
<PER-SHARE-DIVIDEND>                            (0.03)
<PER-SHARE-DISTRIBUTIONS>                       (0.22)
<RETURNS-OF-CAPITAL>                            (0.04)
<PER-SHARE-NAV-END>                              10.66
<EXPENSE-RATIO>                                   1.00
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                              0.00
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<CIK> 0000918571
<NAME> MFS VARIABLE INSURANCE TRUST
<SERIES>
   <NUMBER> 12
   <NAME> MFS RESEARCH SERIES
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               DEC-31-1996
<INVESTMENTS-AT-COST>                         37789169
<INVESTMENTS-AT-VALUE>                        39728433
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<REALIZED-GAINS-CURRENT>                        434597
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<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (55987)
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<NUMBER-OF-SHARES-SOLD>                        2923453
<NUMBER-OF-SHARES-REDEEMED>                   (474538)
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<ACCUMULATED-NII-PRIOR>                              0
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<PER-SHARE-NAV-BEGIN>                            10.89
<PER-SHARE-NII>                                   0.06
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</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<CIK> 0000918571
<NAME> MFS VARIABLE INSURANCE TRUST
<SERIES>
   <NUMBER> 05
   <NAME> MFS GROWTH WITH INCOME SERIES
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               DEC-31-1996
<INVESTMENTS-AT-COST>                          8265617
<INVESTMENTS-AT-VALUE>                         9100425
<RECEIVABLES>                                    90135
<ASSETS-OTHER>                                    6927
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<OTHER-ITEMS-LIABILITIES>                        26439
<TOTAL-LIABILITIES>                              26439
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       8348221
<SHARES-COMMON-STOCK>                           706552
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<ACCUMULATED-NII-CURRENT>                         1499
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<OVERDISTRIBUTION-GAINS>                       (10421)
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<DIVIDEND-INCOME>                                75866
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<NET-INVESTMENT-INCOME>                          61789
<REALIZED-GAINS-CURRENT>                         82828
<APPREC-INCREASE-CURRENT>                       814062
<NET-CHANGE-FROM-OPS>                           961679
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      (60288)
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<NUMBER-OF-SHARES-SOLD>                         720635
<NUMBER-OF-SHARES-REDEEMED>                    (61384)
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<GROSS-EXPENSE>                                  84260
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<PER-SHARE-NAV-BEGIN>                            10.61
<PER-SHARE-NII>                                   0.18
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</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<CIK> 0000918571
<NAME> MFS VARIABLE INSURANCE TRUST
<SERIES>
   <NUMBER> 02
   <NAME> MFS TOTAL RETURN SERIES
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               DEC-31-1996
<INVESTMENTS-AT-COST>                         18705930
<INVESTMENTS-AT-VALUE>                        19779888
<RECEIVABLES>                                   267552
<ASSETS-OTHER>                                    5964
<OTHER-ITEMS-ASSETS>                             10862
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<PAYABLE-FOR-SECURITIES>                        754763
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        59731
<TOTAL-LIABILITIES>                             814494
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      18170528
<SHARES-COMMON-STOCK>                          1404528
<SHARES-COMMON-PRIOR>                           228254
<ACCUMULATED-NII-CURRENT>                          226
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<DIVIDEND-INCOME>                               125576
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<NET-INVESTMENT-INCOME>                         289998
<REALIZED-GAINS-CURRENT>                        125166
<APPREC-INCREASE-CURRENT>                       823206
<NET-CHANGE-FROM-OPS>                          1238370
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                     (287177)
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<NUMBER-OF-SHARES-SOLD>                        1341544
<NUMBER-OF-SHARES-REDEEMED>                   (195111)
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<ACCUMULATED-NII-PRIOR>                           1138
<ACCUMULATED-GAINS-PRIOR>                            0
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<GROSS-EXPENSE>                                 169687
<AVERAGE-NET-ASSETS>                           8189821
<PER-SHARE-NAV-BEGIN>                            12.25
<PER-SHARE-NII>                                   0.46
<PER-SHARE-GAIN-APPREC>                           1.30
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</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<CIK> 0000918571
<NAME> MFS VARIABLE INSURANCE TRUST
<SERIES>
   <NUMBER> 03
   <NAME> MFS UTILITIES SERIES
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               DEC-31-1996
<INVESTMENTS-AT-COST>                          8928253
<INVESTMENTS-AT-VALUE>                         9539398
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<ASSETS-OTHER>                                    5561
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<PAYABLE-FOR-SECURITIES>                        156022
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        51295
<TOTAL-LIABILITIES>                             207317
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                       8962715
<SHARES-COMMON-STOCK>                           700567
<SHARES-COMMON-PRIOR>                           188778
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
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<OVERDISTRIBUTION-GAINS>                        (1816)
<ACCUM-APPREC-OR-DEPREC>                        611242
<NET-ASSETS>                                   9572141
<DIVIDEND-INCOME>                               206973
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<NET-INVESTMENT-INCOME>                         221508
<REALIZED-GAINS-CURRENT>                        563063
<APPREC-INCREASE-CURRENT>                       375250
<NET-CHANGE-FROM-OPS>                          1159821
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                     (219486)
<DISTRIBUTIONS-OF-GAINS>                      (569492)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         809814
<NUMBER-OF-SHARES-REDEEMED>                   (355735)
<SHARES-REINVESTED>                              57710
<NET-CHANGE-IN-ASSETS>                         7198972
<ACCUMULATED-NII-PRIOR>                           3095
<ACCUMULATED-GAINS-PRIOR>                         2871
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<OVERDIST-NET-GAINS-PRIOR>                           0
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<PER-SHARE-NAV-BEGIN>                            12.57
<PER-SHARE-NII>                                   0.55
<PER-SHARE-GAIN-APPREC>                           1.78
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</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<CIK> 0000918571
<NAME> MFS VARIABLE INSURANCE TRUST
<SERIES>
   <NUMBER> 11
   <NAME> MFS HIGH INCOME SERIES
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               DEC-31-1996
<INVESTMENTS-AT-COST>                         12621996
<INVESTMENTS-AT-VALUE>                        12898966
<RECEIVABLES>                                   345493
<ASSETS-OTHER>                                    6579
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<PAYABLE-FOR-SECURITIES>                        235279
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        30644
<TOTAL-LIABILITIES>                             265923
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      12704316
<SHARES-COMMON-STOCK>                          1195325
<SHARES-COMMON-PRIOR>                           189145
<ACCUMULATED-NII-CURRENT>                        12995
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                         (158)
<ACCUM-APPREC-OR-DEPREC>                        276970
<NET-ASSETS>                                  12994123
<DIVIDEND-INCOME>                                    0
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<EXPENSES-NET>                                 (74891)
<NET-INVESTMENT-INCOME>                         608726
<REALIZED-GAINS-CURRENT>                        116891
<APPREC-INCREASE-CURRENT>                       248395
<NET-CHANGE-FROM-OPS>                           974012
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                     (596086)
<DISTRIBUTIONS-OF-GAINS>                      (114491)
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<NUMBER-OF-SHARES-SOLD>                        1753000
<NUMBER-OF-SHARES-REDEEMED>                   (812190)
<SHARES-REINVESTED>                              65370
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<PER-SHARE-NII>                                   0.89
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<PER-SHARE-NAV-END>                              10.87
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</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<CIK> 0000918571
<NAME> MFS VARIABLE INSURANCE TRUST
<SERIES>
   <NUMBER> 01
   <NAME> MFS WORLD GOVERNMENT SERIES
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               DEC-31-1996
<INVESTMENTS-AT-COST>                         25579571
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<TOTAL-LIABILITIES>                            3927736
<SENIOR-EQUITY>                                      0
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<ACCUMULATED-NET-GAINS>                         221999
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<ACCUMULATED-NII-PRIOR>                         166765
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<PER-SHARE-NAV-BEGIN>                            10.17
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<AVG-DEBT-PER-SHARE>                              0.00
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<CIK> 0000918571
<NAME> MFS VARIABLE INSURANCE TRUST
<SERIES>
   <NUMBER> 10
   <NAME> MFS STRATEGIC FIXED INCOME FUND
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               DEC-31-1996
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</TABLE>

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 6
<CIK> 0000918571
<NAME> MFS VARIABLE INSURANCE TRUST
<SERIES>
   <NUMBER> 09
   <NAME> MFS BOND SERIES
<MULTIPLIER> 1
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               DEC-31-1996
<INVESTMENTS-AT-COST>                           925593
<INVESTMENTS-AT-VALUE>                          931870
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<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                        850160
<SHARES-COMMON-STOCK>                            84785
<SHARES-COMMON-PRIOR>                            22360
<ACCUMULATED-NII-CURRENT>                          242
<OVERDISTRIBUTION-NII>                               0
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<OVERDISTRIBUTION-GAINS>                        (3478)
<ACCUM-APPREC-OR-DEPREC>                          6277
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<EXPENSES-NET>                                  (4874)
<NET-INVESTMENT-INCOME>                          29318
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<PAGE>
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<TABLE> <S> <C>

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