MFS SERIES TRUST X
485B24E, 1995-11-28
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   As filed with the Securities and Exchange Commission on November 28, 1995
                                                     1933 Act File No. 33-1657
                                                     1940 Act File No. 811-4492
    
   
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                ---------------
                                   FORM N-1A
            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
                        POST-EFFECTIVE AMENDMENT NO. 13
      AND REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940
                                AMENDMENT NO. 14
    

                               MFS SERIES TRUST X
                    (formerly, MFS Government Mortgage Fund)
               (Exact Name of Registrant as Specified in 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, MA 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)
|_| on [DATE] 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:
    
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
July 31, 1995 on September 29, 1995.
                           CALCULATION OF REGISTRATION FEE
- -------------------------------------------------------------------------------
                          NUMBER       PROPOSED       PROPOSED
                        OF SHARES       MAXIMUM       MAXIMUM
TITLE OF SECURITIES       BEING        OFFERING      AGGREGATE       AMOUNT OF
BEING REGISTERED       REGISTERED     PRICE PER    OFFERING PRICE   REGISTRATION
                                        SHARE                            FEE
- -------------------------------------------------------------------------------
SHARES OF BENEFICIAL
INTEREST (WITHOUT PAR  58,685,834       $6.73         $290,000          $100
     VALUE)
- -------------------------------------------------------------------------------
Registrant elects to calculate the maximum aggregate  offering price pursuant to
Rule 24e-2.  90,173,490  shares were redeemed  during the fiscal year ended July
31, 1995.  31,530,746 shares were used for reductions  pursuant to paragraph (c)
of Rule 24f-2 during the current fiscal year. 58,642,744 shares is the amount of
redeemed  shares used for reduction in this  Amendment.  Pursuant to Rule 457(d)
under the Securities Act of 1933, the maximum public offering price of $6.73 per
share on November  14, 1995 is the price used as the basis for  calculating  the
registration  fee.  While no fee is  required  for the  58,642,744  shares,  the
Registrant has elected to register,  for $100, an additional  $290,000 of shares
(43,090 shares at $6.73 per share).
    
<PAGE>

                          MFS GOVERNMENT MORTGAGE FUND
                             CROSS REFERENCE SHEET
   
(Pursuant to Rule 404 showing  location in the  Prospectus  and/or  Statement of
Additional  Information  of the  responses to the Items in Parts A and B of Form
N-1A)

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

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

 2  (a)            Expense Summary                               *

    (b), (c)                     *                               *

 3  (a)            Condensed Financial Information               *

    (b)                          *                               *

    (c)            Information Concerning Shares                 *
                    of the Fund - Performance
                    Information

    (d)            Condensed Financial Information               *

 4  (a)            The Fund; Investment Objective                *
                    and Policies

    (b), (c)       Investment Objective and Policies             *

 5  (a)            The Fund; Management of the                   *
                     Fund - Investment Adviser

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

    (c), (d)       Management of the Fund -                      *
                     Investment Adviser

    (e)            Management of the Fund - Shareholder          *
                     Servicing Agent; Back Cover Page
    
<PAGE>
   
ITEM NUMBER                                             STATEMENT OF ADDITIONAL
FORM N-1A, PART A        PROSPECTUS CAPTION               INFORMATION CAPTION

    (f)            Expense Summary; Condensed                    *
                     Financial Information

    (g)            Investment Objective and Policies -           *
                     Portfolio Trading; Information
                     Concerning Shares of the Fund -
                     Purchases

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

 6  (a)            Information Concerning Shares of              *
                     the Fund - Purchases; Information
                     Concerning Shares of the Fund -
                     Exchanges; Information Concerning
                     Shares of the Fund - Redemptions
                     and Repurchases; Information
                     Concerning Shares of the Fund -
                     Description of Shares, Voting
                     Rights and Liabilities

    (b), (c), (d)                  *                             *

    (e)            Shareholder Services                          *

    (f)            Information Concerning Shares of              *
                     the Fund - Distributions; Shareholder
                     Services - Distribution Options

    (g)            Information Concerning Shares of              *
                     the Fund - Distributions; Information
                     Concerning Shares of the Fund -
                     Tax Status

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

    (b)            Information Concerning Shares of              *
                     the Fund - Purchases; Information
                     Concerning Shares of the Fund -
                     Net Asset Value
    
<PAGE>
   
ITEM NUMBER                                             STATEMENT OF ADDITIONAL
FORM N-1A, PART A        PROSPECTUS CAPTION               INFORMATION CAPTION

    (c)            Information Concerning Shares of              *
                     the Fund - Purchases; Information
                     Concerning Shares of the Fund -
                     Exchanges; Shareholder Services

    (d)            Front Cover Page; Information                 *
                     Concerning Shares of the Fund -
                     Purchases; Shareholder Services

    (e)            Expense Summary; Information                  *
                     Concerning Shares of the Fund -
                     Purchases; Information Concerning
                     Shares of the Fund - Distribution
                     Plans

    (f)            Information Concerning Shares of              *
                     the Fund - Distribution Plans

 8  (a)            Information Concerning Shares of              *
                     the Fund - Purchases; Information
                     Concerning Shares of the Fund -
                     Redemptions and Repurchases;
                     Shareholder Services

    (b), (c), (d)  Information Concerning Shares of              *
                     the Fund - Redemptions and
                     Repurchases

 9                                *                              *
    
<PAGE>
   
ITEM NUMBER                                             STATEMENT OF ADDITIONAL
FORM N-1A, PART B        PROSPECTUS CAPTION               INFORMATION CAPTION

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

11                                *                    Front Cover Page

12                                *                     Definitions

13  (a), (b), (c)                 *                    Investment Objective,
                                                         Policies and
                                                         Restrictions

    (d)                           *                             *

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

    (c)                           *                    Management of the Fund -
                                                         Trustees and Officers;
                                                         Appendix A

15  (a)                           *                              *

    (b), (c)                      *                    Management of the Fund -
                                                         Trustees and Officers

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

    (b)            Management of the Fund -            Management of the Fund -
                     Investment Adviser                  Investment Adviser

    (c)                          *                               *

    (d)                          *                     Management of the Fund -
                                                         Investment Adviser

    (e)                          *                     Portfolio Transactions
                                                         and Brokerage
                                                         Commissions

    (f)            Information Concerning Shares of    Distribution Plans
                    the Fund - Distribution Plans

    (g)                          *                              *
    
<PAGE>
   
ITEM NUMBER                                             STATEMENT OF ADDITIONAL
FORM N-1A, PART B        PROSPECTUS CAPTION               INFORMATION CAPTION

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

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

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

18  (a)            Information Concerning Shares of    Description of Shares,
                     the Fund - Description of           Voting Rights and
                     Shares, Voting Rights and           Liabilities
                     Liabilities

    (b)                           *                              *

19  (a)            Information Concerning Shares of    Shareholder Services
                     the Fund - Purchases; Shareholder
                     Services

    (b)            Information Concerning Shares of    Management of the Fund -
                     the Fund - Net Asset Value;         Distributor;
                     Information Concerning Shares of    Determination of Net
                     the Fund - Purchases                Asset Value

    (c)                           *                             *

20                                *                    Tax Status

21  (a), (b)                      *                    Management of the Fund -
                                                         Distributor;
                                                         Distribution Plans

    (c)                           *                             *

22  (a)                           *                             *

    (b)                           *                    Determination of Net
                                                         Asset Value and
                                                         Performance
    
<PAGE>

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

23                                *                     Independent Accountants
                                                          and Financial
                                                          Statements


*        Not Applicable
**       Contained in Annual Report
    
<PAGE>

MFS(R) GOVERNMENT 
MORTGAGE FUND 
(A member of the MFS Family of Funds(R)) 
   
PROSPECTUS 
December 1, 1995 
Class A Shares of Beneficial Interest 
Class B Shares of Beneficial Interest 
    
<TABLE>
<CAPTION>
                                                              Page 
                                                             ------- 
  <S>                                                         <C>
1. Expense Summary                                              2 
2. The Fund                                                     3 
3. Condensed Financial Information                              4 
4. Investment Objectives and Policies                           6 
5. Management of the Fund                                      10 
6. Information Concerning Shares of the Fund                   12 
    Purchases                                                  12 
    Exchanges                                                  15 
    Redemptions and Repurchases                                16 
    Distribution Plans                                         19 
    Distributions                                              20 
    Tax Status                                                 20 
    Net Asset Value                                            21 
    Description of Shares, Voting Rights and Liabilities       21 
    Performance Information                                    21 
7. Shareholder Services                                        22 
   Appendix A                                                 A-1 
   Appendix B                                                 B-1 
</TABLE>

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. 

MFS GOVERNMENT MORTGAGE FUND 
500 Boylston Street, Boston, Massachusetts 02116 (617) 954-5000 
   
This Prospectus pertains to the MFS Government Mortgage Fund (the "Fund"), a 
diversified series of MFS Series Trust X (the "Trust"), an open-end 
investment company presently consisting of four series. The primary 
investment objective of the Fund is to provide a high level of current 
income. The secondary objective of the Fund is to protect shareholders' 
capital. The Fund seeks to achieve its objectives by investing, under normal 
circumstances, at least 65% of its total assets in obligations issued or 
guaranteed by the Government National Mortgage Association ("GNMA") 
(including pass-through certificates of GNMA) and in obligations fully 
collateralized or otherwise fully secured by obligations issued or guaranteed 
by GNMA (see "Investment Objectives and Policies"). The minimum initial 
investment is generally $1,000 per account (see "Purchases"). 
    
   
The Fund's investment adviser and distributor are Massachusetts Financial 
Services Company ("MFS" or the "Adviser") and MFS Fund Distributors, Inc. 
("MFD"), respectively, both of which are located at 500 Boylston Street, 
Boston, Massachusetts 02116. 
    
   
Investment products are not insured by the FDIC or any other government 
agency, and are not deposits or other obligations of, or guaranteed by, any 
financial institution. Shares of mutual funds are subject to investment risk, 
including possible loss of the principal amount invested, and will fluctuate 
in value. You may receive more or less than you paid when you redeem your 
shares. 
    
   
This Prospectus sets forth concisely the information concerning the Fund that 
a prospective investor ought to know before investing. The Fund has filed 
with the Securities and Exchange Commission (the "SEC") a Statement of 
Additional Information (the "SAI"), dated December 1, 1995, as amended or 
supplemented from time to time, which contains more detailed information 
about the Fund. The SAI is incorporated into this Prospectus by reference. 
See page 24 for a further description of the information set forth in the 
SAI. A copy of the SAI may be obtained without charge by contacting the 
Shareholder Servicing Agent (see back cover for address and phone number). 
    
   
  Investors should read this Prospectus and retain it for future reference. 
    
<PAGE>
 
1. EXPENSE SUMMARY 
<TABLE>
<CAPTION>
                                                                                                 Class A           Class B 
                                                                                        -------------------   ----------- 
  <S>                                                                                         <C>                 <C>
  Shareholder Transaction Expenses: 
    Maximum Initial Sales Charge Imposed on Purchases of Fund Shares (as a 
     percentage of  offering price)                                                             4.75%             0.00% 
    Maximum Contingent Deferred Sales Charge (as a percentage of original purchase 
     price or redemption proceeds, as applicable)                                             See Below(1)        4.00% 
  Annual Operating Expenses (as a percentage of average net assets): 
    Management Fees                                                                             0.45%(2)          0.45%(2) 
    Rule 12b-1 Fees                                                                             0.35%(3)          1.00%(4) 
    Other Expenses                                                                              0.24%             0.29% 
                                                                                          -----------------     --------- 
    Total Operating Expenses                                                                    1.04%(2)          1.74%(2) 
</TABLE>
    
(1) Purchases of $1 million or more are not subject to an initial sales 
    charge; however, a contingent deferred sales charge (a "CDSC") of 1% will 
    be imposed on such purchases in the event of certain redemption 
    transactions within 12 months following such purchases (see "Information 
    Concerning Shares of the Fund--Purchases"). 
   
(2) Effective January 1, 1996, "Management Fees" will be reduced from 0.65% 
    to 0.45% of the Fund's average daily net assets on an annualized basis. 
    Therefore, through December 31, 1995, "Management Fees" will be 0.65% and 
    "Total Operating Expenses" for Class A and Class B shares of the Fund 
    will be 1.24% and 1.94%, respectively (see "Management of the Fund"). 
    
   
(3) The Fund has adopted a Distribution Plan for its Class A shares in 
    accordance with Rule 12b-1 under the Investment Company Act of 1940, as 
    amended (the "1940 Act"), which provides that it will pay 
    distribution/service fees aggregating up to (but not necessarily all of) 
    0.35% per annum of the average daily net assets attributable to Class A 
    shares (see "Distribution Plans"). Distribution expenses paid under this 
    Plan, together with the initial sales charge, may cause long-term 
    shareholders to pay more than the maximum sales charge that would have 
    been permissible if imposed entirely as an initial sales charge. 
    
   
(4) The Fund has adopted a Distribution Plan for its Class B shares in 
    accordance with Rule 12b-1 under the 1940 Act, which provides that it 
    will pay distribution/service fees aggregating up to 1.00% per annum of 
    the average daily net assets attributable to Class B shares (see 
    "Distribution Plans"). Distribution expenses paid under this Plan, 
    together with any CDSC payable upon redemption of Class B shares, may 
    cause long-term shareholders to pay more than the maximum sales charge 
    that would have been permissible if imposed entirely as an initial sales 
    charge. 
    
Example of Expenses 

An investor would pay the following dollar amounts of expenses on a $1,000 
investment in the Fund, assuming (a) 5% annual return and (b) redemption at 
the end of each of the time periods indicated (unless otherwise noted): 

<TABLE>
<CAPTION>
   
 Period             Class A            Class B 
 ---------------    --------    ---------------------- 
 <S>                <C>         <C>           <C>
                                                   (1) 
  1 year             $ 60        $ 60         $ 20 
  3 years              85          91           61 
  5 years             112         125          105 
  10 years            190         208 (2)      208 (2) 
</TABLE>
    
(1) Assumes no redemption. 

(2) Class B shares convert to Class A shares approximately eight years after 
    purchase; therefore, years nine and ten reflect Class A expenses. 

                                      2 
<PAGE>
The purpose of the expense table above is to assist investors in 
understanding the various costs and expenses that a shareholder of the Fund 
will bear directly or indirectly. More complete descriptions of the following 
Fund expenses are set forth in the following sections: (i) varying sales 
charges on sale purchases"Purchases"; (ii) varying CDSCs"Purchases"; (iii) 
management fees"Investment Adviser"; and (iv) Rule 12b-1 (i.e., distribution 
plan) fees"Distribution Plans." 

The "Example" set forth above should not be considered a representation of 
past or future expenses of the Fund; actual expenses may be greater or less 
than those shown. 

2. THE FUND 
   
The Fund is a diversified series of the Trust, an open-end management 
investment company which was organized as a business trust under the laws of 
The Commonwealth of Massachusetts in 1985. The Trust presently consists of 
four series, each of which represents a portfolio with separate investment 
objectives and policies. Shares of the Fund are continuously sold to the 
public and the Fund then uses the proceeds to buy securities for its 
portfolio. Two classes of shares of the Fund currently are offered to the 
general public. Class A shares are offered at net asset value plus an initial 
sales charge (or a CDSC in the case of certain purchases of $1 million or 
more) and subject to a Distribution Plan providing for a distribution and 
service fee. Class B shares are offered at net asset value without an initial 
sales charge but subject to a CDSC and a Distribution Plan providing for a 
distribution fee which is greater than the Class A distribution and service 
fee. Class B shares will convert to Class A shares approximately eight years 
after purchase. 
    
   
  The Trust's Board of Trustees provides broad supervision over the affairs of 
the Fund. The Adviser is responsible for the management of the Fund's assets 
and the officers of the Trust are responsible for the Fund's operations. The 
Adviser manages the portfolio from day to day in accordance with the Fund's 
investment objectives and policies. A majority of the Trustees are not 
affiliated with the Adviser. The Fund also offers to buy back (redeem) its 
shares from its shareholders at any time at net asset value, less any 
applicable CDSC. 
    
                                      3 
<PAGE>
 
3. CONDENSED FINANCIAL INFORMATION 
   
The following information should be read in conjunction with the financial 
statements included in the Fund's Annual Report to Shareholders which are 
incorporated by reference into the SAI in reliance upon the report of 
Deloitte & Touche LLP, independent certified public accountants, as experts 
in accounting and auditing. 
    
FINANCIAL HIGHLIGHTS 
<TABLE>
<CAPTION>
                                                                Eight 
                                                   Year        Months 
                                                   Ended        Ended 
                                                 July 31,     July 31,            Year Ended November 30, 
                                                                           -------------------------------------- 
                                                   1995         1994        1993      1992      1991       1990 
- ---------------------------------------------     --------    ----------    ------    ------    ------   -------- 
                                                     Class A 
 ---------------------------------------------------------------------------------------------------------------- 
  <S>                                             <C>          <C>          <C>       <C>       <C>       <C>
  Per share data (for a share outstanding throughout each period): 
  Net asset value - beginning of period           $ 6.49       $ 6.85      $ 6.82    $ 6.95    $ 7.01     $ 7.86 
                                                    ------      --------      ----      ----      ----     ------ 
  Income from investment operations # - 
   Net investment income (Section)                $ 0.45       $ 0.29      $ 0.34    $ 0.46    $ 0.48     $ 0.53 
   Net realized and unrealized gain (loss) 
   on investments                                   0.14        (0.36)       0.20      0.09      0.25      (0.40) 
                                                    ------      --------      ----      ----      ----     ------ 
     Total from investment operations             $ 0.59       $(0.07)     $ 0.54    $ 0.55    $ 0.73     $ 0.13 
                                                    ------      --------      ----      ----      ----     ------ 
  Less distributions declared to shareholders 
  - 
   From net investment income                     $(0.42)      $(0.20)     $(0.47)   $(0.42)   $(0.44)    $(0.49) 
   In excess of net realized gain on 
  investments                                       --           --         (0.04)     --        --         -- 
   From paid-in capital                             --          (0.09)       --       (0.26)    (0.35)     (0.49) 
   Tax return of capital                           (0.01)        --          --        --        --         -- 
                                                    ------      --------      ----      ----      ----     ------ 
    Total distributions declared to 
  shareholders                                    $(0.43)      $(0.29)     $(0.51)   $(0.68)   $(0.79)    $(0.98) 
                                                    ------      --------      ----      ----      ----     ------ 
  Net asset value - end of period                 $ 6.65       $ 6.49      $ 6.85    $ 6.82    $ 6.95     $ 7.01 
                                                    ======      ========      ====      ====      ====     ====== 
  Total return++                                    9.60%       (1.51)%+     8.11%     8.25%    11.00%      2.05% 
  Ratios (to average net assets)/Supplemental data (Section): 
   Expenses                                         1.25%        1.27%+      1.38%     1.42%     1.44%      1.40% 
   Net investment income                            6.99%        6.46%+      6.30%     6.57%     6.91%      7.29% 
  Portfolio turnover                                  87%          37%        167%      484%      731%       507% 
  Net assets at end of period 
  (000,000 omitted)                               $  534       $  424      $  522    $  715    $  886     $1,068 
</TABLE>

   
+Annualized. 
#Per share data for the periods subsequent to November 30, 1993 is based on 
average shares outstanding. 
++Total returns for Class A shares do not include the applicable sales charge 
  (except for reinvested dividends prior to October 1, 1989). If the charge 
  had been included, the results would have been lower. 
(Section) The investment adviser did not impose a portion of its management 
          fee for the periods indicated. If this fee had been incurred by the 
          Fund, the net investment income per share and the ratios would have 
          been: 
    

<TABLE>
<CAPTION>
  <S>                                            <C>           <C>         <C>        <C>        <C>       <C>
  Net investment income                          --            $0.29       $0.34      --         --        -- 
  Ratios (to average net assets): 
   Expenses                                      --             1.28%+      1.46%     --         --        -- 
   Net investment income                         --             6.45%+      6.22%     --         --        -- 
</TABLE>

                                      4 
<PAGE>
 <TABLE>
<CAPTION>
                                                                                                         Eight 
                                                                                             Year        Months       Period 
                                                                                            Ended        Ended         Ended 
                                                        Year Ended November 30,            July 31,     July 31,     Nov. 30, 
                                                  -------------------------------------- 
                                                   1989       1988      1987     1986*       1995         1994        1993** 
- ---------------------------------------------     --------    ------    ------    ------    --------    ----------   --------- 
                                                 Class A                                   Class B 
- ---------------------------------------------     --------    ------    ------    ------    --------    ----------   --------- 
  <S>                                             <C>         <C>       <C>       <C>       <C>          <C>          <C>
  Per share data (for a share outstanding throughout each period): 
  Net asset value - beginning of period           $ 7.82     $ 8.34    $ 9.82    $ 9.53     $ 6.49       $ 6.84       $ 6.97 
                                                    ------     ----      ----      ----      ------      --------     ------- 
  Income from investment operations # - 
   Net investment income (Section)                $ 0.59     $ 0.64    $ 0.75    $ 0.72     $ 0.41       $ 0.26       $ 0.38 
   Net realized and unrealized gain (loss) 
   on investments                                   0.48      (0.06)    (1.08)     0.43       0.14        (0.35)       (0.44) 
                                                    ------     ----      ----      ----      ------      --------     ------- 
     Total from investment operations             $ 1.07     $ 0.58    $(0.33)   $ 1.15     $ 0.55       $(0.09)      $(0.06) 
                                                    ------     ----      ----      ----      ------      --------     ------- 
  Less distributions declared to shareholders 
  - 
   From net investment income                     $(0.58)    $(0.64)   $(0.82)   $(0.65)    $(0.38)      $(0.18)      $(0.07) 
   From net realized gain on investments            --         --       (0.01)    (0.21)      --           --           -- 
   From paid-in capital                            (0.45)     (0.46)    (0.32)     --         --          (0.08)        -- 
   Tax return of capital                            --         --        --        --        (0.01)        --           -- 
                                                    ------     ----      ----      ----      ------      --------     ------- 
    Total distributions declared to 
  shareholders                                    $(1.03)    $(1.10)   $(1.15)   $(0.86)    $(0.39)      $(0.26)      $(0.07) 
                                                    ------     ----      ----      ----      ------      --------     ------- 
  Net asset value - end of period                 $ 7.86     $ 7.82    $ 8.34    $ 9.82     $ 6.65       $ 6.49       $ 6.84 
                                                    ======     ====      ====      ====      ======      ========     ======= 
  Total return++                                   14.72%      7.39%    (3.37)%   13.75%+     8.81%       (1.97)%+     (3.91)%+ 
  Ratios (to average net assets)/Supplemental data(Section).: 
   Expenses                                         1.37%      1.38%     1.34%     1.00%+     1.96%        1.94%+       1.87%+ 
   Net investment income                            7.57%      7.88%     8.34%     9.54%+     6.28%        5.80%        5.92%+ 
  Portfolio turnover                                 489%       285%      212%      169%        87%          37%         167% 
  Net assets at end of period 
  (000,000 omitted)                               $1,380     $1,295    $1,129    $  593     $  812       $1,229       $1,628 
   
  *For the period from the commencement of investment operations, January 9, 1986 to November 30, 1986. 
  **For the period from the commencement of offering of Class B shares, September 7, 1993 to November 30, 1993. 
  +Annualized. 
  #Per share data for the periods subsequent to November 30, 1993 is based on average shares outstanding. 
  ++Total returns for Class A shares do not include the applicable sales charge (except for reinvested dividends prior to October 
    1, 1989). If the charge had been included, the results would have been lower. 
  (Section).The investment adviser did not impose a portion of its management fee for the periods indicated. If this fee had been 
            incurred by the Fund, the net investment income per share and the ratios would have been: 
    
</TABLE>
<TABLE>
<CAPTION>
  <S>                                             <C>        <C>       <C>       <C>        <C>          <C>          <C>
  Net investment income                           --         --        --        --         --           --           $0.38 
  Ratios (to average net 
  assets): 
   Expenses                                       --         --        --        --         --           --            1.94%+ 
   Net investment income                          --         --        --        --         --           --            5.85%+ 
</TABLE>

                                      5 
<PAGE>
 
   
4. INVESTMENT OBJECTIVES AND POLICIES 
    
   
Investment Objectives--The Fund's primary investment objective is to provide 
a high level of current income. The Fund's secondary objective is to protect 
shareholders' capital. Any investment involves risk and there can be no 
assurance that the Fund will achieve its objectives. 
    
   
Investment Policies--The Fund seeks to achieve its investment objectives by 
investing at least 65% of its total assets, under normal circumstances, in 
obligations issued or guaranteed by GNMA (including pass-through certificates 
of GNMA which are described below) and in obligations fully collateralized or 
otherwise fully secured by obligations issued or guaranteed by GNMA. The Fund 
may also invest in other securities that are issued or guaranteed as to 
principal and interest by the U.S. Government, its agencies, authorities or 
instrumentalities ("Government Securities"). Such Government Securities 
include (1) the following 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 
10 years), and U.S. Treasury bonds (generally maturities of greater than 10 
years) all of which are backed by the full faith and credit of the United 
States; and (2) obligations issued or guaranteed by U.S. Government agencies 
or instrumentalities, some of which are backed by the full faith and credit 
of the U.S. Treasury; 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; some of which are backed only by the credit of the issuer itself, 
e.g., obligations of the Student Loan Marketing Association; and some of 
which are supported by the discretionary authority of the U.S. Government to 
purchase the agency's obligations, e.g., obligations of the Federal National 
Mortgage Association ("FNMA"). No assurance can be given that the U.S. 
Government will provide financial support to these agencies and 
instrumentalities because it is not obligated by law, in certain instances, 
to do so. The primary types of Government Securities in which the Fund 
invests are described in Appendix B. 
    
   
The Fund may invest in pass-through certificates of GNMA. These certificates 
are mortgage-backed securities which represent a partial ownership interest 
in a pool of mortgage loans issued by lenders such as mortgage bankers, 
commercial banks and savings and loan associations. Each mortgage loan 
included in the pool is either insured by the Federal Housing Administration 
or guaranteed by the Veterans Administration. For a further description of 
these and other such obligations and of the consequences of the prepayment of 
mortgages underlying these certificates, see "Mortgage Pass-Through 
Securities" below and Appendix B. 
    
When and if available, Government Securities may be purchased at a discount 
from face value. However, the Fund does not intend to hold such securities to 
maturity for the purpose of achieving potential capital gains, unless current 
yields on these securities remain attractive. 

Depending on market conditions, the Fund may temporarily take a defensive 
position by investing a substantial portion of its assets in cash, short-term 
Government Securities and related repurchase agreements. 

Government Securities do not generally involve the credit risks associated 
with other types of fixed income securities, although, as a result, the 
yields available from Government Securities are generally lower than the 
yields available from corporate fixed income securities. Like other fixed 
income securities, however, the values of Government Securities change as 
interest rates fluctuate. Therefore, the net asset value of the shares of an 
open-end investment company such as the Fund which invests in fixed income 
securities changes as the general levels of interest rates fluctuate. When 
interest rates decline, the value of a portfolio invested at higher yields 
can be expected to rise. Conversely, when interest rates rise, the value of a 
portfolio invested at lower yields can be expected to decline. Although 
changes in the value of the Fund's portfolio securities subsequent to their 
acquisition are reflected in the net asset value of shares of the Fund, such 
changes will not affect the income received by the Fund from such securities. 
While the Fund seeks to maintain a relatively high, stable dividend, no 
specific level of income or yield differential can ever be assured since 
available yields vary over time. The dividends paid by the Fund will increase 
or decrease in relation to the income received by the Fund from its 
investments which will in any case be reduced by the Fund's expenses before 
being distributed to the Fund's shareholders. 

Mortgage Pass-Through Securities: The Fund may invest in mortgage 
pass-through securities that are Government Securities. Mortgage pass-through 
securities are securities representing interests in "pools" of mortgage 
loans. Monthly payments of 

                                      6 
<PAGE>
   
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 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 Fund may be different from the quoted yield on the 
securities. Mortgage prepayments generally increase with falling interest 
rates and decrease with rising interest rates. Like other fixed income 
securities, when interest rates rise, the value of a 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. 
    
   
Repurchase Agreements: The Fund may enter into repurchase agreements in order 
to earn income on available cash or as a temporary defensive measure. Under a 
repurchase agreement, the Fund 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 Fund's right to liquidate the securities may be 
restricted (during which time the value of the securities could decline). As 
discussed in the SAI, the Fund has adopted certain procedures intended to 
minimize risk. 
    
"When-Issued" Securities: Some Government Securities may be purchased on a 
"when-issued" or on a "forward delivery" basis, which means that the 
securities will be delivered to the Fund 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. 
Although the Fund is not limited as to the amount of Government Securities 
for which it may have commitments to purchase on such bases, it is expected 
that under normal circumstances the Fund will not commit more than 30% of its 
total assets to such purchases. The Fund does not pay for the securities 
until received, and does not start earning interest on the securities until 
the contractual settlement date. While awaiting delivery of the securities 
purchased on such bases, the Fund will hold cash, short-term money market 
instruments or Government Securities in a segregated account. 

Mortgage "Dollar Roll" Transactions: The Fund may enter into mortgage "dollar 
roll" transactions with selected banks and broker-dealers pursuant to which 
the Fund 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 Fund 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. 

Zero Coupon Bonds: The Fund may invest in zero coupon bonds, which are debt 
obligations issued or purchased at a significant discount from face value. 
The Fund will only purchase zero coupon bonds which are Government 
Securities. The discount approximates the total amount of interest the bonds 
will accrue and compound over the period until maturity at a rate of interest 
reflecting the market rate of the security at the time of issuance. Zero 
coupon bonds do not require the periodic payment of interest. Such 
investments benefit the issuer by 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. The Fund 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 Fund's distribution obligations. 

Collateralized Mortgage Obligations and Multiclass Pass-Through Securities: 
The Fund may invest a portion of its assets in collateralized mortgage 
obligations ("CMOs") which are debt obligations collateralized by mortgage 
loans or mortgage pass- through securities (such collateral collectively 
hereinafter referred to as "Mortgage Assets"). Mortgage Assets underlying 
CMOs purchased by the Fund must be issued or guaranteed by the U.S. 
Government, its agencies, authorities or instrumentalities. 

                                      7 
<PAGE>
 
   
The Fund may also invest a portion of its assets in multiclass pass-through 
securities which are interests in a trust composed of Mortgage Assets. Unless 
the context indicates otherwise, all references herein to CMOs include 
multiclass pass-through securities. 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 is 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 the Fund invests, the investment may be subject to a 
greater or lesser risk of prepayment than other types of mortgage- related 
securities. 
    
   
The Fund 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 and the risks related to 
transactions therein, see the SAI. 
    
   
Stripped Mortgage-Backed Securities: The Fund 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 the interest and principal distributions 
from an underlying pool of mortgage assets. The Fund will only invest in SMBS 
whose mortgage assets are issued or guaranteed by the U.S. Government, its 
agencies, authorities or instrumentalities. For a further description of SMBS 
and the risks related to transactions therein, see the SAI. 
    
Swaps and Related Transactions: The Fund may enter into interest rate swaps 
and other types of available swap agreements. Swaps involve the exchange by 
the Fund with another party of cash payments based upon different interest 
rate indexes, and other prices or rates, such as the value of mortgage 
prepayment rates. For example, in the typical interest rate swap, the Fund 
might exchange a sequence of cash payments based on a floating rate index for 
cash payments based on a fixed rate. 

The Fund 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. 
   
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. 
    
   
Lending of Securities and Short Sales: The Fund may make loans of its 
portfolio securities. Such loans will usually be made to member banks of the 
Federal Reserve System and member firms (and subsidiaries thereof) of the New 
York Stock Exchange (the "Exchange") under contracts calling for collateral 
in U.S. Government securities, cash or an irrevocable letter of credit. The 
Fund will continue to collect the equivalent of interest on the securities 
loaned and will also receive either interest (through investment of cash 
collateral) or a fee (if the collateral is Government Securities). The Fund 
may pay finder's and other fees in connection with securities loans. The Fund 
may also make short sales involving either securities retained in the Fund's 
portfolio or securities which the Fund has the right to acquire without 
paying additional consideration. 
    
   
Indexed Securities: The Fund may invest in indexed securities whose value is 
linked to interest rates, commodities, indices or other financial indicators. 
Most indexed securities are short to intermediate term fixed-income 
securities whose values at maturity or interest rates rise or fall according 
to the change in one or more specified underlying instruments. Indexed 
securities 
    
                                      8 
<PAGE>
   
may be positively or negatively indexed (i.e., their value 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. 
    
   
Portfolio Trading: The Fund intends to manage its portfolio by buying and 
selling Government Securities, as well as holding selected obligations to 
maturity, and by engaging in transactions involving related options, Futures 
Contracts and swap transactions. In managing its portfolio the Fund seeks to 
maximize the return on its portfolio by taking advantage of market 
developments and yield disparities. For a description of the strategies which 
may be used by the Fund in managing its portfolio, see the SAI. 
    
   
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. 
("NASD") and such other policies as the Trustees may determine, the Adviser 
may consider sales of shares of the Fund and of other investment company 
clients of MFD, the Fund's distributor, as a factor in the selection of 
broker-dealers to execute the Fund's 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 Fund's operating 
expenses (e.g., fees charged by the custodian of the Fund's assets). For a 
further discussion of portfolio trading, see the SAI. 
    
Options on Fixed Income Securities: The Fund may write (sell) covered put and 
call options on fixed income securities and purchase put and call options. 
The Fund will write such options for hedging purposes and to increase its 
return; however, it will not write such options for the purpose of attempting 
to pay out a pre-established level of dividends or distributions. The Fund 
may also write combinations of put and call options on the same security, 
known as "straddles." The Fund may purchase put or call options in 
anticipation of declines in the value of fixed income portfolio securities or 
increases in the value of securities to be acquired. 
   
For hedging purposes, the Fund may also enter into options on the yield 
"spread," or yield differential, between two securities. This transaction is 
referred to as a "yield curve" option. 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 the Fund 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 "Risks of Investment in Options, 
Futures Contracts and Options on Futures Contracts" 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. 
    
   
In certain instances, the Fund may enter into options on Treasury Securities. 
This type of option is referred to as "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 Fund may purchase and sell options that are traded on U.S. exchanges, and 
options traded over-the-counter, with broker- dealers who deal in these 
options. The ability to terminate over-the-counter options is more limited 
than with exchange-traded options and may involve the risk that 
broker-dealers participating in such transactions will not fulfill their 
obligations. The Fund will treat assets used to cover over-the-counter 
options as illiquid unless the dealer is a primary dealer in U.S. Government 
securities and has given the Fund the unconditional right to close such 
options at a formula price, in which event only an amount of the cover 
determined with reference to the formula will be considered illiquid. The 
Fund may also write over-the-counter options with non-primary dealers and 
will treat the assets used to cover these options as illiquid. See 
"Investment Objectives, Policies and Restrictions--Options on Fixed Income 
Securities" in the SAI for a further discussion of options on fixed income 
securities, as well as the associated risks. 
    
                                      9 
<PAGE>
Futures Contracts: The Fund may enter into futures contracts on fixed income 
securities ("Futures Contracts"). Such transactions may be used to hedge 
against anticipated future changes in interest rates which otherwise might 
either adversely affect the value of the Fund's portfolio securities or 
adversely affect the prices of Government Securities which the Fund intends 
to purchase at a later date. Should interest rates move in an unexpected 
manner, the Fund may not achieve the anticipated benefits of Futures 
Contracts or may realize a loss. 
   
The Fund may also enter into Futures Contracts for non-hedging purposes, to 
the extent permitted by applicable law, which involves greater risks. See 
"Investment Objectives, Policies and RestrictionsFutures Contracts" in the 
SAI for a further discussion of Futures Contracts, as well as the associated 
risks. 
    
   
Options on Futures Contracts: The Fund may also purchase and write options on 
Futures Contracts ("Options on Futures Contracts") for the purpose of 
protecting against declines in the value of fixed income portfolio securities 
or against increases in the cost of such securities to be acquired, as well 
as for non-hedging purposes to the extent permitted by applicable law. 
Purchases of Options on Futures Contracts may present less risk in hedging 
the portfolio of the Fund than the purchase or sale of the underlying Futures 
Contracts, because the potential loss is limited to the amount of the premium 
paid for the option, plus related transaction costs. The writing of such 
options, however, does not present less risk than the trading of Futures 
Contracts, and will constitute only a partial hedge, up to the amount of the 
premium received, less related transaction costs. In addition, if an option 
is exercised, the Fund may suffer a loss on the transaction. See "Investment 
Objectives, Policies and RestrictionsOptions on Futures Contracts" in the SAI 
for a further discussion of Options on Futures Contracts, as well as the 
associated risks. 
    
   
Risks of Investment in Options, Futures Contracts and Options on Futures 
Contracts: The Fund's use of options, Futures Contracts and Options on 
Futures Contracts involves 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 the 
Fund's hedging strategy unsuccessful and could result in losses. The Fund 
also may enter into transactions in such instruments for non-hedging purposes 
to the extent permitted by applicable law, which involves greater risk. In 
particular, such transactions may result in losses for the Fund which are not 
offset by gains on other portfolio positions, thereby reducing gross income. 
There also can be no assurance that a liquid secondary market will exist for 
any contract purchased or sold, and the Fund 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 and Options on Futures Contracts and includes a discussion 
of the risks related to transactions therein. 
    
   
The investment objectives and the policies described above may be changed 
without shareholder approval. 
    
   
The SAI includes a discussion of other investment policies and a listing of 
specific investment restrictions which govern the Fund's investment policies. 
The specific investment restrictions listed in the SAI may be changed without 
shareholder approval unless indicated otherwise. The Fund's investment 
limitations 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 policy. 
    
5. MANAGEMENT OF THE FUND 
   
Investment Adviser--The Adviser manages the assets of the Fund pursuant to an 
Investment Advisory Agreement, dated December 19, 1985, as amended (the 
"Advisory Agreement"). The Adviser provides the Fund with overall investment 
advisory and administrative services, as well as general office facilities. 
James J. Calmas, a Vice President of the Adviser, is the Fund's portfolio 
manager. Mr. Calmas became the portfolio manager of the Fund in January of 
1993. Mr. Calmas joined the Adviser in 1988 as an Investment Analyst. Subject 
to such policies as the Trustees may determine, the Adviser makes investment 
decisions for the Fund. For these services and facilities, the Adviser 
receives a management fee, computed and paid monthly, equal 
    
                                      10 
<PAGE>
   
to, commencing January 1, 1996, 0.45% of the Fund's average daily net asset 
value; through December 31, 1995, the Adviser will be receiving a higher 
management fee equal to the lesser of (i) 0.65% of the Fund's average daily 
net assets or (ii) 0.30% of the Fund's average daily net assets and 6.1% of 
the Fund's gross income (i.e., income other than from the sale of securities, 
short-term gains from options and futures transactions and premium income 
from options written), in every case on an annualized basis for the Fund's 
then-current fiscal year. 
    
   
For the Fund's fiscal year ended July 31, 1995, management fees paid to MFS 
under the Advisory Agreement amounted to $9,450,684 equivalent, on an 
annualized basis, to 0.65% of the Fund's average daily net assets. 
    
   
MFS also serves as investment adviser to each of the other funds in the MFS 
Family of Funds (the "MFS Funds"), to MFS 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 Variable Insurance 
Trust, MFS/Sun Life Series Trust, Sun Growth Variable Annuity Fund, Inc. 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., 
also 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 $39.8 billion on behalf of over 1.8 million investor accounts 
as of October 31, 1995. As of such date, the MFS organization managed 
approximately $19.6 billion of assets in fixed income securities and $15.9 
billion of assets in equity securities. MFS is a wholly owned 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 R. Gardner and John 
D. McNeil. 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 Gardner 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 U.S. 
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 also the Chairman, 
President and a Trustee of the Fund. W. Thomas London, Stephen E. Cavan, 
James R. Bordewick, Jr., and James O. Yost, who are officers of MFS, are also 
officers of the Fund. 
    
   
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 will 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 will 
have access to the extensive international equity investment expertise of 
Foreign & Colonial and Foreign & Colonial will have access to the extensive 
U.S. equity investment expertise of MFS. One or more MFS investment analysts 
are expected to work for an extended period with Foreign & Colonial's 
portfolio managers and investment analysts at their offices in London. In 
return, one or more Foreign & Colonial employees are expected to work in a 
similar manner at MFS' Boston offices. 
    
   
In certain instances there may be securities which are suitable for the 
Fund's 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 the Fund is concerned, in 
other cases, it may produce increased investment opportunities for the Fund. 
    
                                      11 
<PAGE>
 
Distributor--MFD, a wholly owned subsidiary of MFS, is the distributor of 
shares of the Fund and serves as distributor for each of the other MFS Funds. 

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 the Fund. 

6. INFORMATION CONCERNING SHARES OF THE FUND 
   
Purchases 
    
Shares of the Fund may be purchased at the public offering price through any 
dealer and other financial institution ("dealers") having a selling agreement 
with MFD. Dealers may also charge their customers fees relating to investment 
in the Fund. 
   
The Fund offers two classes of shares (Class A and B shares) which bear sales 
charges and distribution fees in different forms and amounts, as described 
below: 
    
   
CLASS A SHARES: Class A shares are generally offered at net asset value plus 
an initial sales charge, but in certain cases are offered at net asset value 
without an initial sales charge but subject to a CDSC. 
    
   
 Purchases Subject to Initial Sales Charge. Class A shares are offered at net 
asset value plus an initial sales charge as follows: 
    
<TABLE>
<CAPTION>
                               Sales Charge* as Percentage of: 
- -------------------------------------------------------------------------------------------- 
                                                                                Dealer 
                                                                            Allowance as a 
                                             Offering      Net Amount       Percentage of 
           Amount of Purchase                 Price         Invested        Offering Price 
- ----------------------------------------    ----------    ------------   ------------------- 
  <S>                                          <C>            <C>               <C>
  Less than $100,000                           4.75%          4.99%             4.00% 
  $100,000 but less than $250,000              4.00           4.17              3.20 
  $250,000 but less than $500,000              2.95           3.04              2.25 
  $500,000 but less than $1,000,000            2.20           2.25              1.70 
  $1,000,000 or more                            None**          None**          See Below** 
</TABLE>
 * Because of rounding in the calculation of offering price, actual sales 
   charges may be more or less then those calculated using the percentages 
   above. 
** A CDSC will apply to such purchases, as discussed below. 
   
MFD allows discounts to dealers (which are alike for all dealers) from the 
applicable public offering price, as shown in the above table. In the case of 
the maximum sales charge, the dealer retains 4% and MFD retains approximately 
3/4 of 1% of the public offering price. The sales charge may vary depending 
on the number of shares of the Fund as well as certain other MFS Funds owned 
or being purchased, the existence of an agreement to purchase additional 
shares during a 13-month period (or 36-month period for purchases of $1 
million or more) or other special purchase programs. A description of the 
Right of Accumulation, Letter of Intent and Group Purchase privileges by 
which the sales charge may be reduced is set forth in the SAI. 
    
 Purchases Subject to a CDSC (but not subject to an initial sales charge). In 
the following two circumstances, Class A shares are also offered at net asset 
value without an initial sales charge but subject to a CDSC, equal to 1% of 
the lesser of the value of the shares redeemed (exclusive of reinvested 
dividend and capital gain distributions) or the total cost of such shares, in 
the event of a share redemption within 12 months following the purchase: 
   
    (i) on investments of $1 million or more in Class A shares; and 
    
   
    (ii) on investments in Class A shares by certain retirement plans subject 
    to the Employee Retirement Income Security Act of 1974, as amended, if 
    the sponsoring organization demonstrates to the satisfaction of MFD that 
    either (a) the employer has at least 25 employees or (b) the aggregate 
    purchases by the retirement plan of Class A shares of the MFS 
    
                                      12 
<PAGE>
Funds will be in an amount of at least $250,000 within a reasonable 
    period of time, as determined by MFD in its sole discretion. 
   
In the case of such purchases, MFD will pay a commission to dealers as 
follows: 1% on sales up to $5 million, plus 0.25% on the amount in excess of 
$5 million. Purchases of $1 million or more for each shareholder account will 
be aggregated over a 12-month period (commencing from the date of the first 
such purchase) for purposes of determining the level of commissions to be 
paid during the period with respect to such account. In addition, with 
respect to sales to retirement plans under the second circumstance described 
above, MFD may pay a commission on sales in excess of $5 million to certain 
retirement plans of 1% to certain dealers which, at MFD's invitation, enter 
into an agreement with MFD in which the dealer agrees to return any 
commission paid to it on the sale (or on a pro rata portion thereof) if the 
shareholder redeems his or her shares within a period of time after purchase 
as specified by MFD. 
    
See "Redemptions and Repurchases--Contingent Deferred Sales Charge" for 
further discussion of the CDSC. 
   
 Waivers of Initial Sales Charge and CDSC. In certain circumstances, the 
initial sales charge imposed upon purchases of Class A shares and the CDSC 
imposed upon redemptions of Class A shares is waived. These circumstances are 
described in Appendix A to this Prospectus. 
    
CLASS B SHARES: Class B shares are offered at net asset value without an 
initial sales charge but subject to a CDSC upon redemption as follows: 
<TABLE>
<CAPTION>
         Year of                Contingent 
        Redemption            Deferred Sales 
      After Purchase              Charge 
- -------------------------    ---------------- 
  <S>                               <C>
  First                             4% 
  Second                            4% 
  Third                             3% 
  Fourth                            3% 
  Fifth                             2% 
  Sixth                             1% 
  Seventh and following             0% 
</TABLE>
For Class B shares purchased prior to January 1, 1993, the CDSC imposed upon 
redemption is as follows: 
<TABLE>
<CAPTION>
         Year of                Contingent 
        Redemption            Deferred Sales 
      After Purchase              Charge 
- -------------------------    ---------------- 
  <S>                               <C>
  First                             6% 
  Second                            5% 
  Third                             4% 
  Fourth                            3% 
  Fifth                             2% 
  Sixth                             1% 
  Seventh and following             0% 
</TABLE>
   
The CDSC imposed is assessed against the lesser of the value of the shares 
redeemed (exclusive of reinvested dividends and capital gain distributions) 
or the total cost of such shares. No CDSC is assessed against shares acquired 
through the automatic reinvestment of dividends or capital gain 
distributions. 
MFD will pay commissions to dealers of 3.75% of the purchase price of Class B 
shares purchased through dealers. MFD will also advance to dealers the first 
year service fee payable under the Fund's Class B Distribution Plan (see 
"Distribution Plans" below) at a rate equal to 0.25% of the purchase price of 
such shares. Therefore, the total amount paid to a dealer upon the sale of 
Class B shares is 4% of the purchase price of the shares (commission rate of 
3.75% plus a service fee equal to 0.25% of the purchase price). 
    
   
See "Redemptions and Repurchases--Contingent Deferred Sales Charge" for 
further discussion of the CDSC. 
    
                                      13 
<PAGE>
   
Waivers of CDSC. In certain circumstances, the CDSC imposed upon redemption 
of Class B shares is waived. These circumstances are described in Appendix A 
to this Prospectus. 
    
   
 Conversion of Class B Shares. Class B shares of the Fund that remain 
outstanding for approximately eight years will convert to Class A shares of 
the same Fund. Shares purchased through the reinvestment of distributions 
paid in respect of Class B shares will be treated as Class B shares for 
purposes of the payment of the distribution and service fees under the 
Distribution Plan applicable to Class B shares. See "Distribution Plans" 
below. However, for purposes of conversion to Class A shares, all shares in a 
shareholder's account that were purchased through the reinvestment of 
dividends and distributions paid in respect of Class B shares (and which have 
not converted to Class A shares as provided in the following sentence) will 
be held in a separate sub-account. Each time any Class B shares in the 
shareholder's account (other than those in the sub-account) convert to Class 
A shares, a portion of the Class B shares then in the sub-account will also 
convert to Class A shares. The portion will be determined by the ratio that 
the shareholder's Class B shares not acquired through reinvestment of 
dividends and distributions that are converting to Class A shares bear to the 
shareholder's total Class B shares not acquired through reinvestment. The 
conversion of Class B shares to Class A shares is subject to the continuing 
availability of a ruling from the Internal Revenue Service or an opinion of 
counsel that such conversion will not constitute a taxable event for federal 
tax purposes. There can be no assurance that such ruling or opinion will be 
available, and the conversion of Class B shares to Class A shares will not 
occur if such ruling or opinion is not available. In such event, Class B 
shares would continue to be subject to higher expenses than Class A shares 
for an indefinite period. 
    
   
General: The following information applies to purchases of all classes of the 
Fund's shares. 
    
   
 Minimum Investment. Except as described below, the minimum initial 
investment is $1,000 per account and the minimum additional investment is $50 
per account. Accounts being established for monthly automatic investments and 
under payroll savings programs and tax-deferred retirement programs (other 
than IRAs) involving the submission of investments by means of group remittal 
statements are subject to a $50 minimum on initial and additional investments 
per account. The minimum initial investment for IRAs is $250 per account and 
the minimum additional investment is $50 per account. Accounts being 
established for participation in the Automatic Exchange Plan are subject to a 
$50 minimum on initial and additional investments per account. There are also 
other limited exceptions to these minimums for certain tax-deferred 
retirement programs. Any minimums may be changed at any time at the 
discretion of MFD. The Fund reserves the right to cease offering its shares 
for sale at any time. 
    
   
 Right to Reject Purchase Orders/Market Timing. Purchases and exchanges 
should be made for investment purposes only. The Fund and MFD each reserve 
the right to reject any specific purchase order or to restrict purchases by a 
particular purchaser (or group of related purchasers). The Fund or MFD may 
reject or restrict any purchases by a particular purchaser or group, for 
example, when such purchase is contrary to the best interests of the Fund's 
other shareholders or otherwise would disrupt the management of the Fund. 
    
   
MFD may enter into an agreement with shareholders who intend to make 
exchanges among certain classes of shares of certain MFS Funds (as determined 
by MFD) which follow a timing pattern, and with individuals or entities 
acting on such shareholders' behalf (collectively, "market timers"), setting 
forth the terms, procedures and restrictions with respect to such exchanges. 
In the absence of such an agreement, it is the policy of the Fund and MFD to 
reject or restrict purchases by market timers if (i) more than two exchange 
purchases are effected in a timed account in the same calendar quarter or 
(ii) a purchase would result in shares being held in timed accounts by market 
timers representing more than (x) one percent of the Fund's net assets or (y) 
specified dollar amounts in the case of certain MFS Funds which may include 
the Fund and which may change from time to time. The Fund and MFD each 
reserve the right to request market timers to redeem their shares at net 
asset value, less any applicable CDSC, if either of these restrictions is 
violated. 
    
   
 Dealer Concessions. Dealers may receive different compensation with respect 
to sales of Class A and Class B shares. In addition, from time to time, MFD 
may pay dealers 100% of the applicable sales charge on sales of Class A 
shares of certain 
    

                                      14 
<PAGE>
   
specified MFS Funds sold by such dealer during a specified sales period. In 
addition, MFD or its affiliates may, from time to time, pay dealers an 
additional commission equal to 0.50% of the net asset value of all of the 
Class B shares of certain specified MFS Funds sold by such dealer during a 
specified sales period. In addition, from time to time, MFD, at its expense, 
may provide additional commissions, compensation or promotional incentives 
("concessions") to dealers which sell shares of the Fund. Such concessions 
provided by MFD may include financial assistance to dealers in connection 
with preapproved conferences or seminars, sales or training programs for 
invited registered representatives, payment for travel expenses, including 
lodging, incurred by registered representatives for such seminars or training 
programs, seminars for the public, advertising and sales campaigns regarding 
one or more MFS Funds, and/or other dealer-sponsored events. From time to 
time, MFD may make expense reimbursements for special training of a dealer's 
registered representatives in group meetings or to help pay the expenses of 
sales contests. Other concessions may be offered to the extent not prohibited 
by state laws or any self-regulatory agency, such as the NASD. 
    
   
 Special Investment Programs. For shareholders who elect to participate in 
certain investment programs (e.g., the Automatic Investment Plan) or other 
shareholder services, MFD or its affiliates may either (i) give a gift of 
nominal value, such as a hand- held calculator, or (ii) make a nominal 
charitable contribution on their behalf. 
    
   
 Restrictions on Activities of National Banks. The Glass-Steagall Act 
prohibits national banks from engaging in the business of underwriting, 
selling or distributing securities. Although the scope of the prohibition has 
not been clearly defined, MFD believes that such Act should not preclude 
banks from entering into agency agreements with MFD. If, however, a bank were 
prohibited from so acting, the Trustees would consider what actions, if any, 
would be necessary to continue to provide efficient and effective shareholder 
services in respect of shareholders who invested in the Fund through a 
national bank. It is not expected that shareholders would suffer any adverse 
financial consequence as a result of these occurrences. In addition, state 
securities laws on this issue may differ from the interpretation of federal 
law expressed herein and banks and financial institutions may be required to 
register as broker-dealers pursuant to state law. 
    
   
A shareholder whose shares are held in the name of, or controlled by, a 
dealer might not receive many of the privileges and services from the Fund 
(such as Right of Accumulation, Letter of Intent and certain recordkeeping 
services) that the Fund ordinarily provides. 
    
   
Exchanges 
    
   
Subject to the requirements set forth below, some or all of the shares in an 
account with the Fund for which payment has been received by the Fund (i.e., 
an established account) may be exchanged for shares of the same class of any 
of the other MFS Funds at net asset value (if available for sale). 
    
   
Exchanges among MFS Funds (excluding exchanges from MFS money market funds): 
No initial sales charges or CDSC will be imposed in connection with an 
exchange from shares of an MFS Fund to shares of any other MFS Fund, except 
with respect to exchanges from an MFS money market fund to another MFS Fund 
which is not an MFS money market fund (discussed below). With respect to an 
exchange involving shares subject to a CDSC, the CDSC will be unaffected by 
the exchange and the holding period for purposes of calculating the CDSC will 
carry over to the acquired shares. 
    
   
Exchanges From an MFS Money Market Fund: Special rules apply with respect to 
the imposition of an initial sales charge or a CDSC for exchanges from an MFS 
money market fund to another MFS Fund which is not an MFS money market fund. 
These rules are described under the caption "Exchanges" in the Prospectuses 
of those MFS money market funds. 
    
   
Exchanges Involving the MFS Fixed Fund: Class A shares of any MFS Fund held 
by certain qualified retirement plans may be exchanged for units of 
participation of the MFS Fixed Fund (a bank collective investment fund) (the 
"Units"), and Units may be exchanged for Class A shares of any MFS Fund. With 
respect to exchanges between Class A shares subject to a CDSC and Units, the 
CDSC will carry over to the acquired shares or Units and will be deducted 
from the redemption proceeds when 
    
                                      15 
<PAGE>
   
such shares or Units are subsequently redeemed, assuming the CDSC is then 
payable (the period during which the Class A shares and the Units were held 
will be aggregated for purposes of calculating the applicable CDSC). In the 
event that a shareholder initially purchases Units and then exchanges into 
Class A shares subject to an initial sales charge of an MFS Fund, the initial 
sales charge shall be due upon such exchange, but will not be imposed with 
respect to any subsequent exchanges between such Class A shares and Units 
with respect to shares on which the initial sales charge has already been 
paid. In the event that a shareholder initially purchases Units and then 
exchanges into Class A shares subject to a CDSC of an MFS Fund, the CDSC 
period will commence upon such exchange, and the applicability of the CDSC 
with respect to subsequent exchanges shall be governed by the rules set forth 
above in this paragraph. 
    
   
General: A shareholder should read the prospectus of the other MFS Fund and 
consider the differences in objectives, policies and restrictions before 
making any exchange. Exchanges will be made only after instructions in 
writing or by telephone (an "Exchange Request") are received for an 
established account by the Shareholder Servicing Agent in proper form (i.e., 
if in writing--signed by the record owner(s) exactly as the shares are 
registered; if by telephone--proper account identification is given by the 
dealer or shareholder of record) and each exchange must involve either shares 
having an aggregate value of at least $1,000 ($50 in the case of retirement 
plan participants whose sponsoring organizations subscribe to the MFS 
FUNDamental 401(k) Plan or another similar 401(k) recordkeeping system made 
available by the Shareholder Servicing Agent) or all the shares in the 
account. If an Exchange Request is received by the Shareholder Servicing 
Agent on any business day prior to the close of regular trading on the 
Exchange (generally, 4:00 p.m., Eastern time), the exchange will occur on 
that day if all the requirements set forth above have been complied with at 
that time and subject to the Fund's right to reject purchase orders. No more 
than five exchanges may be made in any one Exchange Request by telephone. 
Additional information concerning this exchange privilege and prospectuses 
for any of the other MFS Funds may be obtained from dealers or the 
Shareholder Servicing Agent. For federal and (generally) state income tax 
purposes, an exchange is treated as a sale of the shares exchanged and, 
therefore, an exchange could result in a gain or loss to the shareholder 
making the exchange. Exchanges by telephone are automatically available to 
most non-retirement plan accounts and certain retirement plan accounts. For 
further information regarding exchanges by telephone, see "Redemptions by 
Telephone." The exchange privilege (or any aspect of it) may be changed or 
discontinued and is subject to certain limitations, including certain 
restrictions on purchases by market timers. Special procedures, privileges 
and restrictions with respect to exchanges may apply to market timers who 
enter into an agreement with MFD, as set forth in such agreement. See 
"Purchases--General--Right to Reject Purchase Orders/Market Timing." 
    
   
Redemptions and Repurchases 
    
   
A shareholder may withdraw all or any portion of the value of his account on 
any date on which the Fund is open for business by redeeming shares at their 
net asset value (a redemption) or by selling such shares to the Fund through 
a dealer (a repurchase). Certain redemptions and repurchases are, however, 
subject to a CDSC. See "Contingent Deferred Sales Charge" below. Because the 
net asset value of shares of the account fluctuates, redemptions or 
repurchases, which are taxable transactions, are likely to result in gains or 
losses to the shareholder. When a shareholder withdraws an amount from his 
account, the shareholder is deemed to have tendered for redemption a 
sufficient number of full and fractional shares in his account to cover the 
amount withdrawn. The proceeds of a redemption or repurchase will normally be 
available within seven days, except for shares purchased or received in 
exchange for shares purchased by check (including certified checks or 
cashier's checks). Payment of redemption proceeds may be delayed for up to 15 
days from the purchase date in an effort to assure that such check has 
cleared. 
    
   
REDEMPTION BY MAIL: Each shareholder may redeem all or any portion of the 
shares in his account by mailing or delivering to the Shareholder Servicing 
Agent (see back cover for address) a stock power with a written request for 
redemption or a letter of instruction, together with his share certificates 
(if any were issued), all in "good order" for transfer. "Good order" 
generally means that the stock power, written request for redemption, letter 
of instruction or certificate must be endorsed by the record owner(s) exactly 
as the shares are registered and the signature(s) must be guaranteed in the 
manner set forth below under the caption "Signature Guarantee." In addition, 
in some cases "good order" will require the furnishing of additional 
documents. The Shareholder Servicing Agent may make certain de minimis 
exceptions to the above requirements for redemption. Within seven days after 
receipt of a redemption 
    

                                      16 
<PAGE>
   
request in "good order" by the Shareholder Servicing Agent, the Fund will 
make payment in cash of the net asset value of the shares next determined 
after such redemption request was received, reduced by the amount of any 
applicable CDSC described above and the amount of any income tax required to 
be withheld, except during any period in which the right of redemption is 
suspended or date of payment is postponed because the Exchange is closed or 
trading on such Exchange is restricted or to the extent otherwise permitted 
by the 1940 Act if an emergency exists. See "Tax Status" below. 
    
   
REDEMPTION BY TELEPHONE: Each shareholder may redeem an amount from his 
account by telephoning the Shareholder Servicing Agent toll-free at (800) 
225-2606. Shareholders wishing to avail themselves of this telephone 
redemption privilege must so elect on their Account Application, designate 
thereon a bank and account number to receive the proceeds of such redemption, 
and sign the Account Application Form with the signature(s) guaranteed in the 
manner set forth below under the caption "Signature Guarantee." The proceeds 
of such a redemption, reduced by the amount of any applicable CDSC and the 
amount of any income tax required to be withheld, are mailed by check to the 
designated account, without charge, if the redemption proceeds do not exceed 
$1,000, and are wired in federal funds to the designated account if the 
redemption proceeds exceed $1,000. If a telephone redemption request is 
received by the Shareholder Servicing Agent by the close of regular trading 
on the Exchange on any business day, shares will be redeemed at the closing 
net asset value of the Fund on that day. Subject to the conditions described 
in this section, proceeds of a redemption are normally mailed or wired on the 
next business day following the date of receipt of the order for redemption. 
The Shareholder Servicing Agent may be liable for any losses resulting from 
unauthorized telephone transactions if it does not follow reasonable 
procedures designed to verify the identity of the caller. The Shareholder 
Servicing Agent will request personal or other information from the caller, 
and will normally also record calls. Shareholders should verify the accuracy 
of confirmation statements immediately after their receipt. 
    
   
REPURCHASE THROUGH A DEALER: If a shareholder desires to sell his shares 
through his dealer (a repurchase), the shareholder can place a repurchase 
order with his dealer, who may charge the shareholder a fee. If the dealer 
receives the shareholder's order prior to the close of regular trading on the 
Exchange and communicates it to MFD before the close of business on the same 
day, the shareholder will receive the net asset value calculated on that day, 
reduced by the amount of any applicable CDSC and the amount of any income tax 
required to be withheld. 
    
   
REDEMPTION BY CHECK: Only Class A shares may be redeemed by check. A 
shareholder owning Class A shares of the Fund may elect to have a special 
account with State Street Bank and Trust Company (the "Bank") for the purpose 
of redeeming Class A shares from his or her account by check. The Bank will 
provide each Class A shareholder, upon request, with forms of checks drawn on 
the Bank. Only shareholders having accounts in which no share certificates 
have been issued will be permitted to redeem shares by check. Checks may be 
made payable in any amount not less than $500. Shareholders wishing to avail 
themselves of this redemption by check privilege should so request on their 
Account Application, must execute signature cards (for additional 
information, see the Account Application) with signature guaranteed in the 
manner set forth under the caption "Signature Guarantee" below and must 
return any Class A share certificates issued to them. Additional 
documentation will be required from corporations, partnerships, fiduciaries 
or other such institutional investors. All checks must be signed by the 
shareholder(s) of record exactly as the account is registered before the Bank 
will honor them. The shareholders of joint accounts may authorize each 
shareholder to redeem by check. The check may not draw on monthly dividends 
which have been declared but not distributed. Shareholders who purchase Class 
A shares by check (including certified checks or cashier's checks) may write 
checks against those shares only after they have been on the Fund's books for 
15 days. When such a check is presented to the Bank for payment, a sufficient 
number of full and fractional shares will be redeemed to cover the amount of 
the check, any applicable CDSC and the amount of any income tax required to 
be withheld. If the amount of the check, plus any applicable CDSC and the 
amount of any income tax required to be withheld is greater than the value of 
the Class A shares held in the shareholder's account, the check will be 
returned unpaid, and the shareholder may be subject to extra charges. To 
avoid dishonor of checks due to fluctuation in account value, shareholders 
are advised against redeeming all or most of their account by check. Checks 
should not be used to close a Fund account because when the check is written, 
the shareholder will not know the exact total value of the account on the day 
the check clears. There is presently no charge to the shareholder for the 
maintenance of this special account or for the clearance of any checks, but 
the Fund and the bank reserve the right to impose such charges or to modify 
or terminate the redemption by check privilege at any time. 
    

                                      17 
<PAGE>
   
CONTINGENT DEFERRED SALES CHARGE: Investments in Class A or B shares ("Direct 
Purchases") will be subject to a CDSC for a period of 12 months (in the case 
of purchases of $1 million or more of Class A shares or purchases by certain 
retirement plans of Class A shares) or six years (in the case of purchases of 
Class B shares). Purchases of Class A shares made during a calendar month, 
regardless of when during the month the investment occurred, will age one 
month on the last day of the month and each subsequent month. Class B shares 
purchased on or after January 1, 1993 will be aggregated on a calendar month 
basisall transactions made during a calendar month, regardless of when during 
the month they have occurred, will age one year at the close of business on 
the last day of such month in the following calendar year and each subsequent 
year. For Class B shares of the Fund purchased prior to January 1, 1993, 
transactions will be aggregated on a calendar year basis all transactions 
made during a calendar year, regardless of when during the year they have 
occurred, will age one year at the close of business on December 31 of that 
year and each subsequent year. 
    
   
At the time of a redemption, the amount by which the value of a shareholder's 
account for a particular class of shares represented by Direct Purchases 
exceeds the sum of the six calendar year aggregations (12 months in the case 
of purchases of $1 million or more of Class A shares or purchases by certain 
retirement plans of Class A shares) of Direct Purchases may be redeemed 
without charge ("Free Amount"). Moreover, no CDSC is ever assessed on 
additional shares acquired through the automatic reinvestment of dividends or 
capital gain distributions ("Reinvested Shares"). Therefore, at the time of 
redemption of a particular class, (i) any Free Amount is not subject to the 
CDSC and (ii) the amount of redemption equal to the then-current value of 
Reinvested Shares is not subject to the CDSC, but (iii) any amount of the 
redemption in excess of the aggregate of the then-current value of 
Reinvested Shares and the Free Amount is subject to a CDSC. The CDSC will 
first be applied against the amount of Direct Purchases which will result in 
any such charge being imposed at the lowest possible rate. The CDSC to be 
imposed upon redemptions will be calculated as set forth in "Purchases" 
above.
    
   
The applicability of a CDSC will be unaffected by exchanges or transfers of 
registration, except as described in Appendix A hereto. 
    
   
GENERAL: The following information applies to redemptions and repurchases of 
all classes of the Fund's shares. 
    
   
 Signature Guarantee. In order to protect shareholders against fraud, the 
Fund requires, in certain instances as indicated above, that the 
shareholder's signature be guaranteed. In these cases the shareholder's 
signature must be guaranteed by an eligible bank, broker, dealer, credit 
union, national securities exchange, registered securities association, 
clearing agency or savings association. Signature guarantees shall be 
accepted in accordance with policies established by the Shareholder Servicing 
Agent. 
    
   
 Reinstatement Privilege. Shareholders of the Fund who have redeemed their 
shares have a one-time right to reinvest the redemption proceeds in the same 
class of shares of any of the MFS Funds (if shares of such Fund are available 
for sale) at net asset value (with a credit for any CDSC paid) within 90 days 
of the redemption pursuant to the Reinstatement Privilege. If the shares 
credited for any CDSC paid are then redeemed within six years of the initial 
purchase in the case of Class B shares or within twelve months of the initial 
purchase for certain Class A share purchases, a CDSC will be imposed upon 
redemption. Such purchases under the Reinstatement Privilege are subject to 
all limitations in the SAI regarding this privilege. 
    
   
 In-Kind Distributions. Subject to compliance with applicable regulations, 
the Fund has reserved the right to pay the redemption or repurchase price of 
shares of the Fund, either totally or partially, by a distribution in-kind of 
securities (instead of cash) from the Fund's portfolio. The securities in 
such a distribution would be valued at the same amount as that assigned to 
them in calculating the net asset value for the shares being sold. If a 
shareholder received a distribution in-kind, the shareholder could incur 
brokerage or transaction charges when converting the securities to cash. 
    
   
 Involuntary Redemptions/Small Accounts. Due to the relatively high cost of 
maintaining small accounts, the Fund reserves the right to redeem shares in 
any account for their then-current value if at any time the total investment 
in such account drops below $500 because of redemptions, except in the case 
of accounts being established for monthly automatic investments and certain 
payroll savings programs, Automatic Exchange Plan accounts and tax-deferred 
retirement plans, for which there is a lower minimum investment requirement. 
See "PurchasesGeneralMinimum Investment." Shareholders will be notified that 
the value of their account is less than the minimum investment requirement 
and allowed 60 days to make an additional investment before the redemption is 
processed. 
    

                                      18 
<PAGE>
   
Distribution Plans 

The Trustees have adopted separate Distribution Plans for Class A and Class B 
shares pursuant to Section 12(b) of the 1940 Act and Rule 12b-1 thereunder 
(the "Distribution Plans"), after having concluded that there is a reasonable 
likelihood that the Distribution Plans would benefit the Fund and its 
shareholders. 

  FEATURES COMMON TO EACH DISTRIBUTION PLAN: The Distribution Plans have 
certain common features, as described below. 

   Service Fees. Each Distribution Plan provides that the Fund may pay MFD a 
service fee of up to 0.25% of the average daily net assets attributable to 
the class of shares to which the Distribution Plan relates (i.e., Class A or 
Class B shares, as appropriate) (the "Designated Class") annually in order 
that MFD may pay expenses on behalf of the Fund relating to the servicing of 
shares of the Designated Class. The service fee is used by MFD to compensate 
dealers which enter into a sales agreement with MFD in consideration for all 
personal services and/or account maintenance services rendered by the dealer 
with respect to shares of the Designated Class owned by investors for whom 
such dealer is the dealer or holder of record. MFD may from time to time 
reduce the amount of the service fees paid for shares sold prior to a certain 
date. Service fees may be reduced for a dealer that is the holder or dealer 
of record for an investor who owns shares of the Fund having an aggregate net 
asset value at or above a certain dollar level. Dealers may from time to time 
be required to meet certain criteria in order to receive service fees. MFD or 
its affiliates are entitled to retain all service fees payable under each 
Distribution Plan for which there is no dealer of record or for which 
qualification standards have not been met as partial consideration for 
personal services and/or account maintenance services performed by MFD or its 
affiliates to shareholder accounts. 

   Distribution Fees. Each Distribution Plan provides that the Fund may pay 
MFD a distribution fee based on the average daily net assets attributable to 
the Designated Class as partial consideration for distribution services 
performed and expenses incurred in the performance of MFD's obligations under 
its distribution agreement with the Fund. See "Management of the Fund -- 
Distributor" in the SAI. The amount of the distribution fee paid by the Fund 
with respect to each class differs under the Distribution Plans, as does the 
use by MFD of such distribution fees. Such amounts and uses are described 
below in the discussion of the separate Distribution Plans. While the amount 
of compensation received by MFD in the form of distribution fees during any 
year may be more or less than the expense incurred by MFD under its 
distribution agreement with the Fund, the Fund is not liable to MFD for any 
losses MFD may incur in performing services under its distribution agreement 
with the Fund. 

   Other Common Features. Fees payable under each Distribution Plan are 
charged to, and therefore reduce, income allocated to shares of the 
Designated Class. The Distribution Plans have substantially identical 
provisions with respect to their operating policies and their initial 
approval, renewal, amendment and termination. 

Features Unique To Each Distribution Plan: The Distribution Plans have 
certain features that are unique to each class of shares, as described below. 

   Class A Distribution Plan. Class A shares are generally offered pursuant to 
an initial sales charge, a substantial portion of which is paid to or 
retained by the dealer making the sale (the remainder of which is paid to 
MFD). See "Purchases -- Class A Shares" above. In addition to the initial 
sales charge, the dealer also generally receives the ongoing 0.25% per annum 
service fee, as discussed above. 

  The distribution fee paid to MFD under the Class A Distribution Plan is equal,
on an annual basis, to 0.10% of the Fund's average daily net assets attributable
to Class A shares. As noted above, MFD may use the distribution fee to cover
distribution-related expenses incurred by it under its distribution agreement
with the Fund, including commissions to dealers and payments to wholesalers
employed by MFD (e.g., MFD pays commission to dealers with respect to purchases
of $1 million or more of Class A shares which are sold at net asset value but
which are subject to a 1% CDSC for one year after purchase). See "Purchases --
Class A Shares" above. In addition, to the extent that the aggregate service and
distribution fees paid under the Class A Distribution Plan do not exceed 0.35%
per annum of the average daily net assets of the Fund attributable to Class A
shares, the Fund is permitted to pay such distribution-related expenses or other
distribution-related expenses.
    
                                      19 
<PAGE>
   
   Class B Distribution Plan. Class B shares are offered at net asset value 
without an initial sales charge but subject to a CDSC. See "Purchases -- 
Class B Shares" above. MFD will advance to dealers the first year service fee 
described above at a rate equal to 0.25% of the purchase price of such shares 
and, as compensation therefor, MFD may retain the service fee paid by the 
Fund with respect to such shares for the first year after purchase. Dealers 
will become eligible to receive the ongoing 0.25% per annum service fee with 
respect to such shares commencing in the thirteenth month following purchase. 

  Under the Class B Distribution Plan, the Fund pays MFD a distribution fee 
equal, on an annual basis, to 0.75% of the Fund's average daily net assets 
attributable to Class B shares. As noted above, this distribution fee may be 
used by MFD to cover its distribution-related expenses under its distribution 
agreement with the Fund (including the 3.75% commission it pays to dealers 
upon purchase of Class B shares, as described under "Purchases -- Class B 
Shares" above). 

   Current Level of Distribution and Service Fees. The Fund's Class A and 
Class B distribution and service fees for its current fiscal year are 0.35% 
and 1.00% per annum, respectively. 
    
Distributions 

The Fund intends to pay substantially all of its net investment income as 
dividends on a monthly basis. In determining the net investment income 
available for distributions, the Fund may rely on projections of its 
anticipated net investment income over a longer term, rather than its actual 
net investment income for the period. If the Fund earns less than projected, 
or otherwise distributes more than its earnings for the year, a portion of 
the distributions may constitute a return of capital. The Fund 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 during 
the calendar year to its shareholders from short-term capital gains. 
Shareholders may elect to receive dividends and capital gain distributions in 
either cash or additional shares of the class with respect to which the 
distribution is made. See "Tax Status" and "Shareholder ServicesDistribution 
Options" below. Distributions paid by the Fund with respect to Class A shares 
will generally be greater than those paid with respect to Class B shares 
because expenses attributable to Class B shares will generally be higher. 

Tax Status 
   
The Fund is treated as an entity separate from the other series of the Trust 
for federal income tax purposes. In order to minimize the taxes the Fund 
would otherwise be required to pay, the Fund intends to qualify each year as 
a "regulated investment company" under Subchapter M of the Code, and to make 
distributions to its shareholders in accordance with the timing requirements 
imposed by the Code. It is expected that the Fund will not be required to pay 
entity level federal income or excise taxes. 

  Shareholders of the Fund normally will have to pay federal income taxes (and 
any state or local taxes) on the dividends and capital gain distributions 
they receive from the Fund, whether paid in cash or additional shares. 
Shareholders may not have to pay state or local taxes on dividends derived 
from interest on U.S. Government obligations. Investors should consult with 
their tax advisers in this regard. Shortly after the end of each calendar 
year, each shareholder will receive a statement setting forth the federal 
income tax status of all Fund dividends and distributions for that year, 
including the portion taxable as ordinary income, the portion taxable as 
long-term capital gain, the portion representing interest on U.S. Government 
obligations, the portion, if any, representing a return of capital (which is 
free of current taxes but results in a basis reduction), and the amount, if 
any, of federal income tax withheld. 
    
  Fund distributions will reduce the Fund's net asset value per share. 
Shareholders who buy shares shortly before the Fund makes a distribution may 
thus pay the full price for the shares and then effectively receive a portion 
of the purchase price back as a taxable distribution. 
   
  The Fund intends to withhold U.S. federal income tax at a rate of 30% on 
dividends and other payments that are subject to such withholding and that 
are made to persons who are neither citizens nor residents of the U.S., 
regardless of whether a lower rate may be permitted under an applicable law 
or treaty. The Fund is also required in certain circumstances to apply backup 
withholding at a rate of 31% on taxable dividends and redemption proceeds 
paid to any shareholder (including a shareholder who is neither a citizen nor 
a resident of the U.S.) who does not furnish to the Fund certain information 
and certifications, or who is otherwise subject to backup withholding. 
However, backup withholding will not be applied to payments which have 
    
                                      20 
<PAGE>
   
been subject to 30% withholding. Prospective investors should read the 
Account Application for information regarding backup withholding of federal 
income tax and should consult their own tax advisers as to the tax 
consequences of an investment in the Fund. 
    
Dividends of the Fund that are derived from interest on obligations of the 
U.S. Government and certain of its agencies and instrumentalities (but 
generally not from capital gains realized upon a disposition of such 
obligations) may be exempt from state and local taxes in certain states. 
Shareholders should consult their tax advisers regarding the possible 
exclusion of such portion of their dividends for state and local income tax 
purposes. Residents of certain states may be subject to an intangibles tax or 
a personal property tax on all or a portion of the value of their shares. 

Net Asset Value 
   
The net asset value per share of each class of the Fund is determined each 
day during which the Exchange is open for trading. This determination is made 
once during each day as of the close of regular trading on the Exchange by 
deducting the amount of the Fund's liabilities attributable to the class from 
the value of the Fund's assets attributable to the class and dividing the 
difference by the number of shares of the class outstanding. Assets in the 
Fund's portfolio are valued on the basis of their market or other fair value, 
as described in the SAI. The net asset value of each class of shares is 
effective for orders received by the dealer prior to its calculation and 
received by MFD prior to the close of that business day. 
    
Description of Shares, Voting Rights and Liabilities 
   
The Fund has two classes of shares, entitled Class A and Class B Shares of 
Beneficial Interest (without par value). The Fund 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 shares of that particular 
series. Shareholders are entitled to one vote for each share held and shares 
of each series would be entitled to vote separately to approve investment 
advisory agreements or changes in investment restrictions, but shares of all 
series would vote together in the election of Trustees and selection of 
accountants. Additionally, each class of shares of a series will vote 
separately on any material increases in the fees under its Distribution Plan 
or on any other matter that affects solely that class of shares, but will 
otherwise vote together with all other classes of shares of the series on all 
other matters. The Fund 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 class of the Fund represents an equal proportionate interest in
the Fund with each other class share, subject to the liabilities of the
particular class. Shares have no pre-emptive or conversion rights (except as
described above in "Information Concerning Shares of the
Fund--Purchases--Conversion of Class B Shares"). Shares are fully paid and non-
assessable. Should the Fund be liquidated, shareholders of each class are
entitled to share pro rata in the net assets of the Fund attributable to that
class available for distribution to shareholders. Shares will remain on deposit
with the Shareholder Servicing Agent and certificates will not be issued except
in connection with pledges and assignments and in certain other limited
circumstances.

The Fund 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 Fund itself was unable to meet its obligations. 

Performance Information 

From time to time, the Fund will provide yield, current distribution rate and 
total rate of return quotations for each class of shares and may also quote 
fund rankings in the relevant fund category from various sources, such as the 
Lipper Analytical Services, Inc. and Weisenberger Investment Companies 
Service. Yield quotations will be based on the annualized net investment 

                                      21 
<PAGE>
   
income per share of a class of the Fund over a 30 day period stated as a 
percent of the maximum public offering price of shares of that class on the 
last day of that period. The current distribution rate for each class is 
generally based upon the total amount of dividends per share paid by the Fund 
to shareholders of that class during the past twelve months and is computed 
by dividing the amount of such dividends by the maximum public offering price 
of that class at the end of such period. Current distribution rate 
calculations for Class B shares assume no CDSC is paid. The current 
distribution rate differs from the yield calculation because it may include 
distributions to shareholders from sources other than dividends and interest, 
such as premium income from option writing, short-term capital gains, and 
return of invested capital, and is calculated over a different period of 
time. Total rate of return quotations will reflect the average annual 
percentage change over stated periods in the value of an investment in a 
class of the Fund made at the maximum public offering price of shares of that 
class with all distributions reinvested and which, if quoted for periods of 
six years or less, will give effect to the imposition of the CDSC assessed 
upon redemption of the Fund's Class B shares. Such total rate of return 
quotations may be accompanied by quotations which do not reflect the 
reduction in the value of the initial investment due to the sales charge or 
the deduction of a CDSC, and which will thus be higher. All performance 
quotations are based on historical performance and are not intended to 
indicate future performance. Yield reflects only net portfolio income as of a 
stated time and current distribution rate reflects only the rate of 
distributions paid by the Fund over a stated period of time, while total rate 
of return reflects all components of investment return over a stated period 
of time. The Fund's quotations may from time to time be used in 
advertisements, shareholder reports or other communications to shareholders. 
For a discussion of the manner in which the Fund will calculate its yield, 
current distribution rate and total rate of return, see the SAI. For further 
information about the Fund's performance for the fiscal year ended July 31, 
1995, please refer to the Fund's Annual Report. A copy of the Annual Report 
may be obtained without charge by contacting the Shareholder Servicing Agent 
(see back cover for address and phone number). In addition to information 
provided in shareholder reports, the Fund may, in its discretion, from time 
to time, make a list of all or a portion of its holdings available to 
investors upon request. 
    
7. SHAREHOLDER SERVICES 

Shareholders with questions concerning the shareholder services described 
below or concerning other aspects of the Fund should contact the Shareholder 
Servicing Agent (see back cover for address and phone number). 

  Account and Confirmation Statements--Each shareholder will receive 
confirmation statements showing the transaction activity in his account. At 
the end of each calendar year, each shareholder will receive income tax 
information regarding reportable dividends and capital gain distributions for 
that year (see "Tax Status"). 

  Distribution Options--The following options are available to all accounts 
(except Systematic Withdrawal Plan accounts) and may be changed as often as 
desired by notifying the Shareholder Servicing Agent: 

   --Dividends and capital gain distributions reinvested in additional shares. 
     This option will be assigned if no other option is specified; 

   --Dividends in cash; capital gain distributions (except as provided below) 
     reinvested in additional shares; 

   --Dividends and capital gain distributions in cash. 

With respect to the second option, the Fund may from time to time make 
distributions from short-term capital gains on a monthly basis, and to the 
extent such gains are distributed monthly, they shall be paid in cash; any 
remaining short-term capital gains not so distributed shall be reinvested in 
additional shares. 

Reinvestments (net of any tax withholding) will be made in additional full 
and fractional shares at the net asset value in effect at the close of 
business on the record date. Checks for dividends and capital gain 
distributions in amounts less than $10 will automatically be reinvested in 
additional shares of the Fund. If a shareholder has elected to receive 
dividends and/or capital gain distributions in cash and the postal or other 
delivery service is unable to deliver checks to the shareholder's address of 
record, such shareholder's distribution option will automatically be 
converted to having all dividends and other distributions 

                                      22 
<PAGE>
 
reinvested in additional shares. Any request to change a distribution option 
must be received by the Shareholder Servicing Agent by the record date for a 
dividend or distribution in order to be effective for that dividend or 
distribution. No interest will accrue on amounts represented by uncashed 
distribution or redemption checks. 

Investment and Withdrawal Programs--For the convenience of shareholders, the 
Fund makes available the following programs designed to enable shareholders 
to add to their investment in an account with the Fund or withdraw from it 
with a minimum of paper work. The programs involve no extra charge to 
shareholders (other than a sales charge in the case of certain Class A share 
purchases) and may be changed or discontinued at any time by a shareholder or 
the Fund. 
   
 Letter of Intent: If a shareholder (other than a group purchaser as 
described in the SAI) anticipates purchasing $100,000 or more of Class A 
shares of the Fund alone or in combination with the total value of all shares 
of all classes of other MFS Funds or the MFS Fixed Fund within a 13-month 
period (or 36-month period for purchases of $1 million or more), the 
shareholder may obtain such shares of the Fund at the same reduced sales 
charge as though the total quantity were invested in one lump sum, subject to 
escrow agreements and the appointment of an attorney for redemptions from the 
escrow amount, if the intended purchases are not completed, by completing the 
Letter of Intent section of the Account Application. 
    
 Right of Accumulation: A shareholder qualifies for cumulative quantity 
discounts on purchases of Class A shares when his new investment, together 
with the current offering price value of all holdings of all classes of 
shares of that shareholder in the MFS Funds or the MFS Fixed Fund (a bank 
collective investment fund) reaches a discount level. 

 Distribution Investment Program: Shares of a particular class of the Fund 
may be sold at net asset value (and without any applicable CDSC) through the 
automatic reinvestment of dividend and capital gain distributions from the 
same class of another MFS Fund. Furthermore, distributions made by the Fund 
may be automatically invested at net asset value (and without any applicable 
CDSC) in shares of the same class of another MFS Fund, if shares of such Fund 
are available for sale. 
   
 Systematic Withdrawal Plan: A shareholder may direct the Shareholder 
Servicing Agent to send him (or anyone he designates) regular periodic 
payments based upon the value of his account. Each payment under a Systematic 
Withdrawal Plan must be at least $100, except in certain limited 
circumstances. The aggregate withdrawals of Class B shares in any year 
pursuant to a SWP will not be subject to a CDSC and are generally limited to 
10% of the value of the account at the establishment of the SWP. The CDSC 
will not be waived in the case of SWP redemptions of Class A shares which are 
subject to a CDSC. 
    
Dollar Cost Averaging Programs--

 Automatic Investment Plan: Cash investments of $50 or more may be made 
through a shareholder's checking account twice monthly, monthly or quarterly. 
Required forms are available from the Shareholder Servicing Agent or 
investment dealers. 
   
  Automatic Exchange Plan: Shareholders having account balances of at least 
$5,000 in any MFS Fund may exchange their shares for the same class of shares 
of other MFS Funds under the Automatic Exchange Plan, a dollar cost averaging 
program. The Automatic Exchange Plan provides for automatic monthly or 
quarterly exchanges of funds from the shareholder's account in an MFS Fund 
for investment in the same class of shares in other MFS Funds selected by the 
shareholder. Under the Automatic Exchange Plan, exchanges of at least $50 
each may be made to up to four different funds. A shareholder should consider 
the objectives and policies of a fund and review its prospectus before 
electing to exchange money into such fund through the Automatic Exchange 
Plan. No transaction fee is imposed in connection with exchange transactions 
under the Automatic Exchange Plan. However, exchanges of shares of MFS Money 
Market Fund, MFS Government Money Market Fund and Class A shares of MFS Cash 
Reserve Fund will be subject to any applicable sales charge. For federal and 
(generally) state income tax purposes, an exchange is treated as a sale of 
the shares exchanged and, therefore, could result in a capital gain or loss 
to the shareholder making the exchange. See the SAI for further information 
concerning the Automatic Exchange Plan. Investors should consult their tax 
advisers for information regarding the potential capital gain and loss 
consequences of transactions under the Automatic Exchange Plan. 
    

                                      23 
<PAGE>
   
Because a dollar cost averaging program involves periodic purchases of shares 
regardless of fluctuating share offering prices, a shareholder should 
consider his financial ability to continue his purchases through periods of 
low or falling price levels. Maintaining a dollar cost averaging program 
concurrently with a withdrawal program could be disadvantageous because of 
the sales charges included in share purchases in the case of Class A shares, 
and because of the assessment of the CDSC for certain share redemptions in 
the case of Class A shares. 
    
Tax-Deferred Retirement Plans-Shares of the Fund may be purchased by all types 
of tax-deferred retirement plans, including IRAs, SEP-IRA plans, 401(k) 
plans, 403(b) plans and other corporate pension and profit-sharing plans. 
Investors should consult with their tax advisers before establishing any of 
the tax-deferred retirement plans described above. 
   
The Fund's SAI, dated December 1, 1995, contains more detailed information 
about the Fund, including, but not limited to, information related to (i) 
investment objectives, policies and restrictions, (ii) its Trustees, officers 
and investment adviser, (iii) portfolio transactions and brokerage 
commissions, (iv) the method used to calculate yield, distribution rate and 
total rate of return quotations of the Fund, (v) the Class A and Class B 
Distribution Plans, and (vi) various services and privileges provided by the 
Fund for the benefit of its shareholders, including additional information 
with respect to the exchange privilege. 
    

                                      24 
<PAGE>
   
                                                                    Appendix A 

                           WAIVERS OF SALES CHARGES 

This Appendix sets forth the various circumstances in which all applicable 
sales charges are waived (Section I), the initial sales charge and the 
contingent deferred sales charge ("CDSC") for Class A shares are waived 
(Section II), and the CDSC for Class B shares is waived (Section III). 

  I. WAIVERS OF ALL APPLICABLE SALES CHARGES 


    In the following circumstances, the initial sales charge imposed on 
    purchases of Class A shares and the CDSC imposed on certain redemptions 
    of Class A shares and on redemptions of Class B shares, as applicable, 
    are waived: 

    1. Dividend Reinvestment 

 (bullet) Shares acquired through dividend or capital gain reinvestment; and 

 (bullet) Shares acquired by automatic reinvestment of distributions of 
          dividends and capital gains of any fund in the MFS Family of Funds 
          ("MFS Funds") pursuant to the Distribution Investment Program. 

    2. Certain Acquisitions/Liquidations 

(bullet) Shares acquired on account of the acquisition or liquidation of 
         assets of other investment companies or personal holding companies. 

    3. Affiliates of an MFS Fund/Certain Dealers. Shares acquired by: 

(bullet) Officers, eligible directors, employees (including retired 
         employees) and agents of Massachusetts Financial Services Company 
         ("MFS"), Sun Life Assurance Company of Canada ("Sun Life") or any of 
         their subsidiary companies; 

(bullet) Trustees and retired trustees of any investment company for which 
         MFS Fund Distributors, Inc. ("MFD") serves as distributor; 

(bullet) Employees, directors, partners, officers and trustees of any 
         sub-adviser to any MFS Fund; 

(bullet) Employees or registered representatives of dealers and other 
         financial institutions ("dealers") which have a sales agreement with 
         MFD; 

(bullet) Certain family members of any such individual and their spouses 
         identified above and certain trusts, pension, profit- sharing or 
         other retirement plans for the sole benefit of such persons, 
         provided the shares are not resold except to the MFS Fund which 
         issued the shares; and 

(bullet) Institutional Clients of MFS or MFS Asset Management, Inc. ("AMI"). 

4. Involuntary Redemptions (CDSC waiver only) 

(bullet) Shares redeemed at an MFS Fund's direction due to the small size of 
         a shareholder's account. See "Redemptions and Repurchases -- General 
         -- Involuntary Redemptions/Small Accounts" in the Prospectus. 

    5. Retirement Plans (CDSC waiver only). Shares redeemed on account of 
distributions made under the following circumstances: 

       Individual Retirement Accounts ("IRAs") 

(bullet) Death or disability of the IRA Owner. 
    
                                      A-1 
<PAGE>
   
Section 401(a) Plans ("401(a) Plans") and Section 403(b) Employer Sponsored 
Plans ("ESP Plans") 

(bullet) Death, disability or retirement of 401(a) or ESP Plan participant; 

(bullet) Loan from 401(a) or ESP Plan (repayment of loans, however, will 
         constitute new sales for purposes of assessing sales charges); 

(bullet) Financial hardship (as defined in Treasury Regulation Section 
         1.401(k)-1(d)(2), as amended from time to time); 

(bullet) Termination of employment of 401(a) or ESP Plan participant 
         (excluding, however, a partial or other termination of the Plan); 

(bullet) Tax-free return of excess 401(a) or ESP Plan contributions; 

(bullet) To the extent that redemption proceeds are used to pay expenses (or 
         certain participant expenses) of the 401(a) or ESP Plan (e.g., 
         participant account fees), provided that the Plan sponsor subscribes 
         to the MFS FUNDamental 401(k) Plan or another similar recordkeeping 
         system made available by MFS Service Center, Inc. (the "Shareholder 
         Servicing Agent"); and 

(bullet) Distributions from a 401(a) or ESP Plan that has invested its assets 
         in one or more of the MFS Funds for more than 10 years from the 
         later to occur of: (i) January 1, 1993 or (ii) the date such 401(a) 
         or ESP Plan first invests its assets in one or more of the MFS 
         Funds. The sales charges will be waived in the case of a redemption 
         of all of the 401(a) or ESP Plan's shares in all MFS Funds (i.e., 
         all the assets of the 401(a) or ESP Plan invested in the MFS Funds 
         are withdrawn), unless immediately prior to the redemption, the 
         aggregate amount invested by the 401(a) or ESP Plan in shares of the 
         MFS Funds (excluding the reinvestment of distributions) during the 
         prior four years equals 50% or more of the total value of the 401(a) 
         or ESP Plan's assets in the MFS Funds, in which case the sales 
         charges will not be waived. 

     Section 403(b) Salary Reduction Only Plans ("SRO Plans") 

(bullet) Death or disability of SRO Plan participant. 

6. Certain Transfers of Registration (CDSC waiver only). Shares transferred: 

(bullet) To an IRA rollover account where any sales charges with respect to 
         the shares being reregistered would have been waived had they been 
         redeemed; and 

(bullet) From a single account maintained for a 401(a) Plan to multiple 
         accounts maintained by the Shareholder Servicing Agent on behalf of 
         individual participants of such Plan, provided that the Plan sponsor 
         subscribes to the MFS 
         FUNDamental 401(k) Plan or another similar recordkeeping system made 
         available by the Shareholder Servicing Agent. 

 II. WAIVERS OF CLASS A SALES CHARGES 


     In addition to the waivers set forth in Section I above, in the 
     following circumstances the initial sales charge imposed on purchases of 
     Class A shares and the CDSC imposed on certain redemptions of Class A 
     shares are waived: 

     1. Investment of Redemption Proceeds from Unaffiliated Mutual Funds 

(bullet) Shares acquired through the investment of redemption proceeds from 
         another open-end management investment company not distributed or 
         managed by MFD or its affiliates if: (i) the investment is made 
         through a dealer and appropriate documentation is submitted to MFD; 
         (ii) the redeemed shares were subject to an initial sales charge or 
         deferred sales charge (whether or not actually imposed); (iii) the 
         redemption occurred no more than 90 days prior to the purchase of 
         Class A shares; and (iv) the MFS Fund, MFD or its affiliates have 
         not agreed with such company or its 
    
                                      A-2 
<PAGE>
    
         affiliates, formally or informally, to waive sales charges on Class 
         A shares or provide any other incentive with respect to such 
         redemption and sale. 

    2. Wrap Account Investments 

(bullet) Shares acquired by investments through certain dealers which have 
         entered into an agreement with MFD which includes a requirement that 
         such shares be sold for the sole benefit of clients participating in 
         a "wrap" account or a similar program under which such clients pay a 
         fee to such dealer. 

    3. Investment by Insurance Company Separate Accounts 

(bullet) Shares acquired by insurance company separate accounts. 

    4. Retirement Plans 

Administrative Services Arrangements 

(bullet) Shares acquired by retirement plans whose third party administrators 
         or dealers have entered into an administrative services agreement 
         with MFD or one of its affiliates to perform certain administrative 
         services, subject to certain operational and minimum size 
         requirements specified from time to time by MFD or one or more of 
         its affiliates. 

Reinvestment of Distributions from Qualified Retirement Plans 

(bullet)  Shares acquired through the automatic reinvestment in Class A 
          shares of Class A or Class B distributions which constitute 
          required withdrawals from qualified retirement plans. 

Shares redeemed on account of distributions made under the following 
circumstances: 

     IRAs 

(bullet) Distributions made on or after the IRA owner has attained the age of 
         59-1/2 )years old; and 

(bullet) Tax-free returns of excess IRA contributions. 

     401(a) Plans 

(bullet) Distributions made on or after the 401(a) Plan participant has 
         attained the age of 59-1/2 years old; and 

(bullet) Certain involuntary redemptions and redemptions in connection with 
         certain automatic withdrawals from a 401(a) Plan. 

     ESP Plans and SRO Plans 

(bullet) Distributions made on or after the ESP or SRO Plan participant has 
         attained the age of 59-1/2 years old. 

III. WAIVERS OF CLASS B SALES CHARGES 

     In addition to the waivers set forth in Section I above, in the 
     following circumstances the CDSC imposed on redemptions of Class B 
     shares is waived: 

     1. Systematic Withdrawal Plan 

(bullet) Systematic Withdrawal Plan redemptions with respect to up to 10% per 
         year of the account value at the time of establishment. 
    
                                      A-3 
<PAGE>

   
     2. Death of Owner 

(bullet) Shares redeemed on account of the death of the account owner if the 
         shares are held solely in the deceased individual's name or in a 
         living trust for the benefit of the deceased individual. 

     3. Disability of Owner 

(bullet) Shares redeemed on account of the disability of the account owner if 
         shares are held either solely or jointly in the disabled 
         individual's name or in a living trust for the benefit of the 
         disabled individual (in which case a disability certification form 
         is required to be submitted to the Shareholder Servicing Agent). 

     4. Retirement Plans. Shares redeemed on account of distributions made 
        under the following circumstances: 

      IRAs, 401(a) Plans, ESP Plans and SRO Plans 

(bullet) Distributions made on or after the IRA owner or the 401(a), ESP or 
         SRO Plan participant, as applicable, has attained the age of 70-1/2 
         years old, but only with respect to the minimum distribution under 
         applicable Internal Revenue Code ("Code") rules. 

      Salary Reduction Simplified Employee Pension Plans ("SAR-SEP Plans") 

(bullet) Distributions made on or after the SAR-SEP Plan participant has 
         attained the age of 70-1/2 years old, but only with respect to the 
         minimum distribution under applicable Code rules; and 
(bullet) Death or disability of a SAR-SEP Plan participant. 
    
                                      A-4 
<PAGE>
   
                                                                    Appendix B 
    
              Description of Obligations Issued or Guaranteed by 
          U.S. Government Agencies, Authorities or Instrumentalities 

GNMA Certificates--are mortgage-backed securities which represent a partial 
ownership interest in a pool of mortgage loans issued by lenders such as 
mortgage bankers, commercial banks and savings and loan associations. Each 
mortgage loan included in the pool is either insured by the Federal Housing 
Administration or guaranteed by the Veterans Administration. 

The Fund will purchase only GNMA Certificates of the "modified pass-through" 
type, which entitle the holder to receive its proportionate share of all 
interest and principal payments owed on the mortgage pool, net of fees paid 
to the issuer and GNMA. Payment of principal of and interest on GNMA 
Certificates of the "modified pass-through" type is guaranteed by GNMA. 

The average life of a GNMA Certificate is likely to be substantially less 
than the original maturity of the mortgage pools underlying the securities. 
Prepayments of principal by mortgagors and mortgage foreclosures will usually 
result in the return of the greater part of principal invested far in advance 
of the maturity of the mortgages in the pool. Foreclosures impose no risk to 
principal investment because of the GNMA guarantee. 

As the prepayment rates of individual mortgage pools will vary widely, it is 
not possible to accurately predict the average life of a particular issue of 
GNMA Certificates. However, statistics published by the FHA indicate that the 
average life of a single-family dwelling mortgage with a 25- 30-year 
maturity, the type of mortgage which backs the vast majority of GNMA 
Certificates, is approximately 12 years. It is therefore customary practice 
to treat GNMA Certificates as 30-year mortgage-backed securities which prepay 
fully in the twelfth year. 

As a consequence of the fees paid to GNMA and the issuer of GNMA 
Certificates, the coupon rate of interest of GNMA Certificates is lower than 
the interest paid on the VA-guaranteed or FHA-insured mortgages underlying 
the GNMA Certificates. 

The yield which will be earned on GNMA Certificates may vary from their 
coupon rates for the following reasons: (i) Certificates may be issued at a 
premium or discount, rather than at par; (ii) Certificates may trade in the 
secondary market at a premium or discount after issuance; (iii) interest is 
earned and compounded monthly which has the effect of raising the effective 
yield earned on the Certificates; and (iv) the actual yield of each 
Certificate is affected by the prepayment of mortgages included in the 
mortgage pool underlying the Certificates and the rate at which principal so 
prepaid is reinvested. In addition, prepayment of mortgages included in the 
mortgage pool underlying a GNMA Certificate purchased at a premium may result 
in a loss to the Fund. 

Due to the large amount of GNMA Certificates outstanding and active 
participation in the secondary market by securities dealers and investors, 
GNMA Certificates are highly liquid instruments. Prices of GNMA Certificates 
are readily available from securities dealers and depend on, among other 
things, the level of market rates, the Certificate's coupon rate and the 
prepayment experience of the pool of mortgages backing each Certificate. 

FNMA Bonds--are bonds issued and guaranteed by the Federal National Mortgage 
Association and are not guaranteed by the U.S. Government. 

FHLMC Bonds--are bonds issued and guaranteed by the Federal Home Loan 
Mortgage Corporation and are not guaranteed by the U.S. Government. 

Export-Import Bank Certificates--are certificates of beneficial interest and 
participation certificates issued and guaranteed by the Export-Import Bank of 
the United States. 

Federal Agricultural Mortgage Corporation Certificates--are certificates of 
beneficial interest guaranteed by the Federal Agricultural Mortgage 
Corporation. 
                                      B-1 
<PAGE>

Federal Agricultural Mortgage Corporation Bonds and Notes--are bonds and 
notes guaranteed by the Federal Agricultural Mortgage Corporation. 

Federal Farm Credit Banks Consolidated Systemwide Notes and Bonds--are bonds 
issued and guaranteed by a cooperatively owned nationwide system of banks and 
associations supervised by the Farm Credit Administration. 

Federal Home Loan Bank Notes and Bonds--are notes and bonds issued by the 
Federal Home Loan Bank System. 

Federal Home Loan Bank Certificates--are certificates of beneficial interest 
and participation certificates issued and guaranteed by the Federal Home Loan 
Bank System. 

FHA Debentures--are debentures issued by the Federal Housing Authority of the 
U.S. Government. 

FICO Bonds and Notes--are bonds and notes issued and guaranteed by the 
Financing Corporation. 

GSA Participation Certificates--are participation certificates issued by the 
General Services Administration of the U.S. Government. 

Maritime Administration Bonds--are bonds issued by the Department of 
Transportation of the U.S. Government. 

New Communities Debentures--are debentures issued in accordance with the 
provisions of Title IV of the Housing and Urban Development Act of 1968, as 
supplemented and extended by Title VII of the Housing and Urban Development 
Act of 1970, the payment of which is guaranteed by the U.S. Government. 

REFCORP Bonds and Notes--are bonds and notes issued and guaranteed by the 
Resolution Funding Corporation. 

SBA Debentures--are debentures fully guaranteed as to principal and interest 
by the Small Business Administration of the U.S. Government. 

SLMA Debentures--are debentures backed by the Student Loan Marketing 
Association. 

Title XI Bonds--are bonds issued in accordance with the provisions of Title 
XI of the Merchant Marine Act of 1936, as amended, the payment of which is 
guaranteed by the U.S. Government. 

TVA Bonds and Notes--are bonds and notes issued and guaranteed by the 
Tennessee Valley Authority. 

U.S. Department of Veteran Affairs Certificates--are certificates of 
beneficial interest guaranteed by the U.S. Department of Veteran Affairs. 

Washington Metropolitan Area Transit Authority Bonds-- are bonds issued by 
the Washington Metropolitan Area Transit Authority and guaranteed by the 
Secretary of Transportation of the U.S. Government. 

Although this list includes the primary types of Government Securities in 
which the Fund invests (other than U.S. Treasury obligations), the Fund may 
also invest in Government Securities other than those listed above. 

                                      B-2 

<PAGE>

(Artwork Logo--MFS)

MFS(R) GOVERNMENT 
MORTGAGE FUND 
(A member of the MFS Family of Funds(R)

STATEMENT OF 
ADDITIONAL INFORMATION 
   
December 1, 1995 
    
<TABLE>
<CAPTION>
<S>     <C>                                                       <C>
                                                                  Page 
                                                                  ----- 
 1.     Definitions                                                  2 
 2.     Investment Objectives, Policies and Restrictions             2 
 3.     Management of the Fund                                      11 
         Trustees                                                   11 
         Officers                                                   11 
         Investment Adviser                                         12 
         Custodian                                                  13 
         Shareholder Servicing Agent                                13 
         Distributor                                                13 
 4.     Portfolio Transactions and Brokerage Commissions            14 
 5.     Shareholder Services                                        14 
         Investment and Withdrawal Programs                         14 
         Exchange Privilege                                         16 
         Tax-Deferred Retirement Plans                              17 
 6.     Tax Status                                                  17 
 7.     Determination of Net Asset Value and Performance            18 
 8.     Distribution Plans                                          21 
 9.     Description of Shares, Voting Rights and Liabilities        22 
10.     Independent Accountants and Financial Statements            22 
        Appendix A                                                  23 
</TABLE>
   
MFS GOVERNMENT MORTGAGE FUND 
A Series of MFS Series Trust X 
500 Boylston Street, Boston, Massachusetts 02116 
(617) 954-5000 
This Statement of Additional Information (the "SAI") sets forth information 
which may be of interest to investors but which is not necessarily included 
in the Fund's Prospectus, dated December 1, 1995. 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 is NOT a prospectus and is authorized for distribution to 
prospective investors only if preceded or accompanied by a current 
prospectus. 


<PAGE>

1. DEFINITIONS 
   
  "Fund"             -- MFS Government Mortgage Fund, a 
                     diversified series of MFS Series Trust 
                     X (the "Trust"), a Massachusetts 
                     business trust. The Trust was known as 
                     MFS Government Mortgage Fund prior to 
                     June 2, 1995, MFS Government Income Plus 
                     Fund prior to March 1, 1993 and MFS 
                     Government Income Plus Trust prior to 
                     August 3, 1992. 
  "MFS" or the       -- Massachusetts Financial Services 
  "Adviser"          Company, a Delaware corporation. 
  "MFD"              -- MFS Fund Distributors, Inc., a 
                     Delaware corporation. 
  "Prospectus"       -- The Prospectus of the Fund, dated 
                     December 1, 1995, as amended or 
                     supplemented from time to time. 

2. INVESTMENT OBJECTIVES, POLICIES AND RESTRICTIONS 

Investment Objectives. The Fund's primary investment objective is to provide 
a high level of current income. The secondary objective of the Fund is to 
protect shareholders' capital. Any investment involves risk and there can be 
no assurance that the Fund will achieve its objectives. 
    
Investment Policies. The investment policies of the Fund are described in the 
Prospectus. In addition, certain of the Fund's investment policies are 
described in greater detail below. 

Repurchase Agreements: The Fund may enter into repurchase agreements with 
sellers who are member firms (or a subsidiary thereof) of the New York Stock 
Exchange (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 the Fund 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 Fund, or 
the purchase and repurchase prices may be the same, with interest at a 
standard rate due to the Fund together with the repurchase price on 
repurchase. In either case, the income to the Fund is unrelated to the 
interest rate on the U.S. 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, the Fund will have the right to liquidate the securities. If at 
the time the Fund 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 
Fund's exercise of its right to liquidate the securities may be delayed and 
result in certain losses and costs to the Fund. The Fund has adopted and 
follows procedures which are intended to minimize the risks of repurchase 
agreements. For example, the Fund 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 the Fund has the right to make margin calls at any time 
if the value of the securities falls below the agreed upon margin. 
   
Mortgage Pass-Through Securities. The Fund may invest in mortgage 
pass-through securities as described in the Prospectus. 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 Government National Mortgage Association ("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 
the 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-though 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 the Federal National 
Mortgage Association ("FNMA") and the Federal Home Loan Mortgage Corporation 
("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 was created by Congress in 1970 as a corporate instrumentality of the 
U.S. Government for the purpose of increasing 

                                      2 
<PAGE>
   
the availability of mortgage credit for residential housing. FHLMC issues 
Participation Certificates which represent interests in conventional 
mortgages (i.e., not federally insured or guaranteed) from FHLMC's national 
portfolio. FHLMC guarantees timely payment of interest and ultimate 
collection of principal regardless of the status of the underlying mortgage 
loans. 
    
   
"When-Issued" Securities: The Fund may purchase securities on a "when-issued" 
or on a "forward delivery" basis. When the Fund commits to purchase U.S. 
Government securities on a "when-issued" or "forward delivery" basis, it will 
set up procedures consistent with policies promulgated by the Securities and 
Exchange Commission (the "SEC"). Since those policies currently recommend 
that an amount of the Fund's assets equal to the amount of the purchase be 
held aside or segregated to be used to pay for the commitment, the Fund will 
always have cash, short-term money market instruments or U.S. Government 
securities sufficient to cover any commitments or to limit any potential 
risk. The Fund does not intend to make such purchases for speculative 
purposes. The Fund will only make commitments to purchase securities on a 
when-issued or forward delivery basis with the intention of actually 
acquiring the securities. However, the Fund may sell these securities before 
the settlement date if it is deemed advisable as a matter of investment 
strategy. When the time comes to pay for when-issued or forward delivery 
securities, the Fund will meet its obligations from then available cash flow 
or the sale of securities, or, although it would not normally expect to do 
so, from the sale of the "when-issued" or forward delivery securities 
themselves (which may have a value greater or less than the Fund's payment 
obligation). 
    
Mortgage "Dollar Roll" Transactions: As described in the Prospectus, the Fund 
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. During the roll period, the Fund foregoes principal and interest 
paid on the mortgage-backed securities. The Fund 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. The Fund may 
also be compensated by receipt of a commitment fee. 

Collateralized Mortgage Obligations and Multiclass Pass-Through Securities: 
The Fund may invest a portion of its assets in collateralized mortgage 
obligations ("CMOs") which are debt obligations collateralized by mortgage 
loans or mortgage pass-through securities. Collateral underlying CMOs 
purchased by the Fund must be issued or guaranteed by the U.S. Government, 
its agencies, authorities or instrumentalities. Typically, CMOs are 
collateralized by certificates issued by the GNMA, FNMA or FHLMC (such 
collateral collectively hereinafter referred to as "Mortgage Assets"). The 
Fund may also invest a portion of its assets in multiclass pass-through 
securities which are interests in a trust composed of Mortgage Assets. These 
Mortgage Assets must be issued or guaranteed by the U.S. Government, its 
agencies, authorities or instrumentalities. Unless the context indicates 
otherwise, all references herein to CMOs include multiclass pass-through 
securities. 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 is usually issued in multiple 
classes. 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. Interest is paid or accrues on all classes of the CMOs on 
a monthly, quarterly or semiannual 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 primarily of interest payments or 
principal payments. 
    
The Fund 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. 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. 

Stripped Mortgage-Backed Securities: The Fund may invest a portion of its 
assets in stripped mortgage-backed securities ("SMBS"), which are derivative 
multiclass mortgage securities. 
   
SMBS are usually structured with two classes that receive different 
proportions of the interest and principal distributions from a pool of 
Mortgage Assets. The Fund will only invest in SMBS whose Mortgage Assets are 
issued or guaranteed by the U.S. Government, its agencies, authorities or 
instrumentalities. A common type of SMBS will have one class receiving some 
of the interest and most of the principal from the 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 
    


                                      3 
<PAGE>
 
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, the Fund 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. 

Swaps and Related Transactions: The Fund may enter into interest rate swaps 
and other types of available swap agreements. Swaps involve the exchange by 
the Fund with another party of cash payments based upon different interest 
rate indexes and other prices or rates, such as the value of mortgage 
prepayment rates. For example, in the typical interest rate swap, the Fund 
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. 

The Fund 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. 

The Fund will maintain cash or appropriate liquid assets with its custodian 
to cover its current obligations under swap transactions and cap, floor and 
collar arrangements. If the Fund enters into a swap agreement on a net basis 
(i.e., the two payment streams are netted out, with the Fund receiving or 
paying, as the case may be, only the net amount of the two payments), the 
Fund will maintain cash or liquid assets with its Custodian with a daily 
value at least equal to the excess, if any, of the Fund's accrued obligations 
under the swap agreement over the accrued amount the Fund is entitled to 
receive under the agreement. If the Fund 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 Fund's 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 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 the Fund would be less than what it would have been if these 
investment techniques had not been used. If the counterparty defaults, the 
Fund's risk of loss consists of the net amount of payments that the Fund is 
contractually entitled to receive. The Fund 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 Fixed Income Securities: The Fund may write (sell) covered call 
and put options on fixed income securities and purchase call and put options. 
An option provides the purchaser, or "holder," with the right, but not the 
obligation, to purchase, in the case of a "call" option, or sell, in the case 
of a "put" option, the fixed income security or securities in connection with 
which the option was written, for a fixed exercise price up to a stated 
expiration date or, in the case of certain options, on such date. The holder 
pays a non-refundable purchase price for the option, known as the "premium." 
The maximum amount of risk the purchaser of the option assumes is equal to 
the premium plus related transaction costs, although this entire amount may 
be lost. The risk of the seller, or "writer," however, is potentially 
unlimited, unless the option is "covered." A call option written by the Fund 
is "covered" if the Fund 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 the Fund holds a call 
on the same fixed income 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 
Fund in cash, short-term money market instruments or high quality government 
securities in a segregated account with its custodian. A put option written 
by the Fund is "covered" if the Fund maintains cash, short-term money market 
instruments or high quality government securities with a value equal to the 
exercise price in a segregated account with its custodian, or else holds a 
put on the same security and in the same principal amount as the put written 
where the exercise price of the put held is (a) equal to or greater than the 
exercise price of the put written or (b) is less than the exercise price of 
the put written if the difference is maintained by the Fund in cash or 
short-term money market instruments in a segregated account with its 
custodian. Put and call options written by the Fund 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. 
    
The Fund may write options for hedging purposes. In particular, if the Fund 
writes an option which expires unexercised or is closed out by the Fund at a 
profit, the Fund retains the premium paid for the option less related 
transaction costs, which increases its gross income and offsets in part the 
reduced value of the portfolio security in connection with which the option 
is written, or the increased cost of portfolio securities to be acquired. In 
contrast, however, if the price of the security underlying the option moves 
adversely to the Fund's position, the option may be exer-

                                      4 
<PAGE>
 
cised and the Fund will then be required to purchase or sell thesecurity at a 
disadvantageous price, which might only partially be offset by the amount of 
the premium. 

The Fund may write options in connection with buy-and-write transactions; 
that is, the Fund may purchase a security and then write a call option 
against that security. The exercise price of the call option the Fund 
determines to write depends 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. 

The writing of covered put options is similar in terms of risk/return 
characteristics to buy-and-write transactions. Put options may be used by the 
Fund in the same market environments in which call options are used in 
equivalent buy-and-write transactions. 
   
In certain instances, the Fund may enter into Options on 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 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 Fund 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 Fund 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. 
    
The Fund may also write combinations of put and call options on the same 
security, a practice known as a "straddle." By writing a straddle, the Fund 
undertakes a simultaneous obligation to sell or 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 Fund will be required to sell the underlying security at a below market 
price. This loss may be offset, however, in whole or in 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 a security remains stable and neither the call nor the put is 
exercised. In an instance 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 on a portfolio security, the Fund 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, the 
Fund 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 loss unless the security subsequently appreciates in value. The writing 
of options will not be undertaken by the Fund for speculative purposes, but 
rather for hedging purposes. Where options are written for hedging purposes, 
such transactions will 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. 

The Fund may also purchase put and call options on securities. Put options 
are purchased to hedge against a decline in the value of securities held in 
the Fund's portfolio. If such a decline occurs, the put options will permit 
the Fund to sell the securities underlying such options at the exercise 
price, or to close out the options at a profit. The Fund will purchase call 
options to hedge against an increase in the price of securities that the Fund 
anticipates purchasing in the future. If such an increase occurs, the call 
option will permit the Fund to purchase the securities underlying such option 
at the exercise price or to close out the option at a profit. The premium 
paid for a call or put option plus any transaction costs will reduce the 
benefit, if any, realized by the Fund upon exercise of the option, and, 
unless the price of the underlying security rises or declines sufficiently, 
the option may expire worthless to the Fund. In addition, in the event that 
the price of the security in connection with which an option was purchased 
moves in a direction favorable to the Fund, the benefits realized by the Fund 
as a result of such favorable movement will be reduced by the amount of the 
premium paid for the option and related transaction costs. 

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, together with other illiquid securities, cannot 
exceed a certain percentage of the Fund's assets (the "SEC illiquidity 
ceiling"). Although the Adviser disagrees with this position, the Adviser 
intends to limit the Fund's writing of over-the-counter options in accordance 
with the following procedure. Except as provided below, the Fund 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 the Fund has in place with such primary dealers will provide that 
the Fund 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 
the Fund for writing the option, plus the amount, if any, of the option's 
intrinsic value (i.e., 

                                      5 
<PAGE>
 
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-the-money. The 
Fund will treat all or a portion of the formula as illiquid for purposes of 
the SEC illiquidity ceiling. The Fund may also write over-the-counter options 
with non- primary dealers and will treat the assets used to cover these 
options as illiquid for purposes of such SEC illiquidity ceiling. 

Yield Curve Options: The Fund 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, the Fund may purchase or write such options for 
hedging purposes. For example, the Fund 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. 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 the Fund will be "covered." A 
call (or put) option is covered if the Fund 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 Fund's net liability under the two options. Therefore, the Fund's 
liability for such a covered option is generally limited to the difference 
between the amount of the Fund's liability under the option written by the 
Fund less the value of the option held by the Fund. 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 traded over-the-counter, the SEC has taken the position that 
yield curve options are illiquid and, therefore, cannot exceed the SEC 
illiquidity ceiling. See "Options on Fixed Income Securities" above for a 
discussion of the policies the Adviser intends to follow to limit the Fund's 
investment in these securities. 
    
   
Indexed Securities: The Fund may purchase securities whose prices are indexed 
to the prices of other securities, securities indices, commodities, or other 
financial indicators. Indexed securities typically, but not always, are debt 
securities or deposits whose value at maturity or coupon rate is determined 
by reference to a specific instrument or statistic. 
    
   
The performance of indexed securities depends to a great extent on the 
performance of the security or other instrument to which they are indexed, 
and may also be influenced by interest rate changes in the U.S. 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. 
    
   
Futures Contracts: The Fund may enter into contracts for the purchase or sale 
for future delivery of fixed income securities ("Futures Contracts"). Such 
transactions will be used to hedge (i.e., protect) against anticipated 
changes in interest rates which otherwise might either adversely affect the 
value of the Fund's portfolio securities or adversely affect the prices of 
long-term U.S. Government securities which the Fund intends to purchase at a 
later date. The Fund may also enter into such transactions for non-hedging 
purposes to the extent permitted by applicable law. 
    
When a Futures Contract is sold, the Fund incurs a contractual obligation to 
deliver the securities underlying the contract at a specified price on a 
specified date during a specified future month or, in the case of Futures 
Contracts on an index of securities, to make or receive a cash settlement. A 
"purchase" of a Futures Contract means a contractual obligation by the Fund 
to receive delivery of the securities called for by the contract at a 
specified price during a specific future month or, in the case of Futures 
Contracts on an index of securities, to make or receive cash settlements. 

   
Futures Contracts have been designed by exchanges which have been designated 
"contract markets" by the Commodity Futures Trading Commission ("CFTC"), and 
must be executed through a futures commission merchant, or brokerage firm, 
which is a member of the relevant contract market. Futures Contracts trade on 
these markets, and the exchanges, through their clearing organizations, 
guarantee that the contracts will be performed as between the clearing 
members of the exchange. The Fund will only enter into Futures Contracts 
which are based on U.S. Government securities, including any index of U.S. 
Government securities. 
    
   
While Futures Contracts based on debt securities provide for the delivery of 
securities, deliveries are very seldom made. Generally, a Futures Contract is 
terminated by entering into an offsetting transaction. The Fund will incur 
brokerage fees when it purchases and sells Futures Contracts. At the same 
time such a purchase or sale is made, the Fund must provide cash or 
securities as a deposit ("initial deposit") known as "margin." The initial 
deposit varies but may be as low as 5% or less of the value of the contract. 
Daily thereafter, the Futures Contract is valued on a marked-to- market basis 
and the Fund may be required to pay or receive additional "variation margin", 
based on the decline or increase in the value of the contract. At the time of 
delivery of securities pursuant to such a contract, adjustments are made to 
recognize differences in value arising from the delivery of securities with a 
different interest rate than the specific security that provides the standard 
for the contract. In some (but not many) cases, securities called for by a 
Futures Contract may not have been issued when the contract was written. A 
Futures Contract on an index of U.S. Government securities provides for the 
payment and receipt of a cash 
    

                                      6 
<PAGE>
 
   
settlement based on changes in the value of the index. The index underlying 
such a Contract is comprised of a broad based portfolio of U.S. Government 
securities designed to reflect movements in the market as a whole. 
    
The purpose of the purchase or sale of a Futures Contract for hedging 
purposes, in the case of a portfolio such as the Fund's portfolio, which 
holds or intends to acquire long-term debt securities, is to protect the Fund 
against the adverse effects of fluctuations in interest rates without 
actually buying or selling long-term debt securities. For example, since the 
Fund owns long-term bonds, if interest rates were expected to increase the 
Fund might enter into Futures Contracts for the sale of debt securities. If 
interest rates did increase, the value of the debt securities in the 
portfolio would decline, but the value of the Fund's Futures Contracts would 
increase at approximately the same rate thereby keeping the net asset value 
of the Fund from declining, or declining as much as it otherwise would have. 

Similarly, when it is expected that interest rates may decline, 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 
Futures Contracts should be similar to that of long-term bonds, the Fund 
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 Futures 
Contracts could be liquidated and the Fund could buy long-term bonds on the 
cash market. Due to changing market conditions, however, and interest rate 
forecasts, a futures position may be terminated without a corresponding 
purchase of securities. To the extent the Fund purchases a Futures Contract, 
it will maintain a segregated asset account consisting of cash, cash 
equivalents or short-term money market instruments in an amount equal to the 
difference between the fluctuating market value of such Futures Contracts and 
the aggregate value of the initial deposit and variation margin payments made 
by the Fund with respect to such Futures Contracts, thereby assuring that the 
position is unleveraged. 

The liquidity of a market in a futures contract may be adversely affected by 
"daily price fluctuation limits" established by commodity exchanges, which 
limit the amount of fluctuation in a futures contract price 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 positions. Prices have in the past exceeded the 
daily limit on a number of consecutive trading days. On any day or days when 
the price fluctuation limits have been reached, the Fund may be unable to 
liquidate existing futures positions or to implement a hedging strategy 
through the purchase or sale of particular futures. 

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 
portfolio of the Fund. The trading of Futures Contracts is also subject to 
the illiquidity risks described above with respect to options on securities. 

Options on Futures Contracts: The Fund may write and purchase options to buy 
or sell Futures Contracts ("Options on Futures Contracts"). The writing of a 
call Option on a Futures Contract may constitute a partial hedge against 
declining prices of the fixed income security underlying the Futures 
Contract. If the futures price at expiration of the option is below the 
exercise price, the Fund 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 Fund's portfolio holdings. The writing 
of a put Option on a Futures Contract may constitute a partial hedge against 
increasing prices of the security underlying the Futures Contract. If the 
futures price at expiration of the option is higher than the exercise price, 
the Fund will retain the full amount of the option premium, less related 
transaction costs, which provides a partial hedge against any increase in the 
price of securities which the Fund intends to purchase. If a put or call 
option the Fund has written is exercised, the Fund 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 changes in the value of its futures positions, the Fund's 
losses from existing Options on Futures Contracts may to some extent be 
reduced or increased by changes in the value of portfolio securities. The 
Fund may also enter into such transactions for non-hedging purposes, to the 
extent permitted by applicable law, which involves greater risk. 

The Fund may purchase Options on Futures Contracts for hedging purposes as an 
alternative to 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 a rise in interest rates, 
the Fund may, in lieu of selling Futures Contracts, purchase put options 
thereon. In the event that such decrease in portfolio value occurs, it may be 
offset, in whole or part, by a profit on the option. Conversely, where it is 
projected that the value of securities to be acquired by the Fund will 
increase prior to acquisition, due to a market advance or a decline in 
interest rates, the Fund may purchase call Options on Futures Contracts, 
rather than purchasing the underlying Futures Contracts. As in the case of 
Options, the writing of Options on Futures Contracts may require the Fund to 
forego all or a portion of the benefits of favorable movements in the price 
of portfolio securities, and the purchase of Options on Futures Contracts may 
require the Fund to forego all or a portion of such benefits up to the amount 
of the premium paid and related transaction costs. The Fund may also enter 
into transactions in Options on Futures Contracts for non-hedging purposes to 
the extent permitted by applicable law. 

The Fund 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 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 

                                      7 
<PAGE>

   
call written or (ii) is greater than the exercise price of the call written 
if the difference is maintained by the Fund in cash, short-term money market 
instruments or high quality government securities in a segregated account 
with its custodian. The Fund may cover the writing of put Options on Futures 
Contracts (a) through sales of the underlying Futures Contract, (b) through 
segregation of cash, short-term money market instruments or high quality 
government securities 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 is less than the exercise price of the 
put written if the difference is maintained by the Fund in cash, short-term 
money market instruments or high quality government securities 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 the Fund, the Fund will be required to sell the 
underlying Futures Contract which, if the Fund 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 the 
Fund is exercised, the Fund will be required to purchase the underlying 
Futures Contract which, if the Fund has covered its obligation through the 
sale of such Contract, will close out its futures position. An Option on a 
Futures Contract is traded on the same contract market as the underlying 
Futures Contract, subject to regulation by the CFTC and the performance 
guarantee of the exchange clearing house. 
    
Risk Factors: Imperfect Correlation of Hedging Instruments with the Fund's 
Portfolio--The Fund's ability effectively to hedge all or a portion of its 
portfolio through transactions in options and Futures Contracts will depend 
on the degree to which price movements in the underlying instruments 
correlate with price movements in the relevant portion of the Fund's 
portfolio. If the values of fixed income portfolio securities being hedged do 
not move in the same amount or direction as the instruments underlying 
options or Futures Contracts, the Fund's hedging strategy may not be 
successful and the Fund could sustain losses on its hedging strategy which 
would not be offset by gains on its portfolio. It is also possible that there 
may be a negative correlation between the instrument underlying an option or 
Futures Contract and the portfolio securities being hedged, which could 
result in losses both on the hedging transaction and the portfolio 
securities. In such instances, the Fund's overall return could be less than 
if the hedging transaction had not been undertaken. 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. 
As a result, the correlation probably will not be exact. Consequently, the 
Fund bears the risk that the price of the fixed income portfolio securities 
being hedged will not move in the same amount or direction as the underlying 
index or obligation. 

The correlation between prices of fixed income securities and prices of 
options or Futures Contracts may be distorted due to 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 option 
and Futures Contract markets. Due to the possibility of distortion, a correct 
forecast of general interest rate trends by the Adviser may still not result 
in a successful transaction. The trading of Options on Futures Contracts also 
entails the risk that changes in the value of the underlying Futures Contract 
will not be fully reflected in the value of the option. The risk of imperfect 
correlation, however, generally tends to diminish as the maturity or 
termination date of the option or Futures Contract approaches. 

The trading of options and Futures Contracts also entails the risk that, if 
the Adviser's judgment as to the general direction of interest or exchange 
rates is incorrect, the Fund's overall performance may be poorer than if it 
had not entered into any such contract. For example, if the Fund has hedged 
against the possibility of an increase in interest rates, and rates instead 
decline, the Fund will lose part or all of the benefit of the increased value 
of the fixed income securities being hedged, and may be required to meet 
ongoing daily variation margin payments. 

It should be noted that the Fund may purchase and write Options, Futures 
Contracts and Options on Futures Contracts not only for hedging purposes, but 
also for non-hedging purposes to the extent permitted by applicable law. As a 
result, the Fund will incur the risk that losses on such transactions will 
not be offset by corresponding increases in the value of fixed income 
portfolio securities or decreases in the cost of fixed income securities to 
be acquired. 

Risk Factors: Potential Lack of a Liquid Secondary Market-- Prior to exercise 
or expiration, a position in an exchange-traded option, Futures Contract or 
Option on a Futures Contract can only be terminated by entering into a 
closing purchase or sale transaction, which requires a secondary market for 
such instruments on the exchange on which the initial transaction was 
entered. If no such market exists, it may not be possible to close out a 
position, and the Fund could be required to purchase or sell the underlying 
instrument or meet ongoing variation margin requirements. The inability to 
close out option or futures positions also could have an adverse effect on 
the Fund's ability effectively to hedge its portfolio. 

The liquidity of a secondary market in an option or Futures Contract may be 
adversely affected by "daily price fluctuation limits," established by the 
exchanges, which limit the amount of fluctuation in the price of a contract 
during a single trading day and prohibit trading beyond such limits once they 
have been reached. Such limits could prevent the Fund from liquidating open 
positions, which could render its hedging strategy unsuccessful and result in 
trading losses. The exchanges on which options and Futures Contracts are 
traded have also established a number of limitations governing the maximum 
number of positions which may be traded by a trader, whether acting alone or 
in concert with others. Further, the purchase and sale of exchange-traded 
options and Futures Contracts is subject to the risk of trading halts, 
suspensions, exchange or clearing corporation equipment failures, government 
intervention, insolvency of a brokerage firm, intervening broker or clearing 
corporation or other disruptions of nor-

                                      8 
<PAGE>
 
mal trading activity, which could make it difficult or impossible to 
liquidate existing positions or to recover excess variation margin payments. 

Risk Factors: Options on Futures Contracts--In order to profit from the 
purchase of an Option on a Futures Contract, it may be necessary to exercise 
the option and liquidate the underlying Futures Contract, subject to all of 
the risks of futures trading. The writer of an Option on a Futures Contract 
is subject to the risks of futures trading, including the requirement of 
initial and variation margin deposits. 

Additional Policies on the Use of Options and Futures: In order to assure 
that the Fund will not be deemed to be a "commodity pool" for purposes of the 
Commodity Exchange Act, regulations of the CFTC require that the Fund 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 Fund's assets. In addition, the Fund must comply with the 
requirements of various state securities laws in connection with such 
transactions. 

The Fund has adopted the additional policy 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 the Fund's total assets. Moreover, the Fund 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 the Fund purchases a Futures Contract, an amount of cash and cash 
equivalents will be deposited in a segregated account with the Fund's 
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. 
    
   
Lending of Portfolio Securities: The Fund may seek to increase its income by 
lending portfolio securities. Such loans will usually be made to member banks 
of the Federal Reserve System and to member firms of the Exchange (and 
subsidiaries thereof), and would be required to be secured continuously by 
collateral in cash, U.S. Government 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. The Fund 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 days). During the 
existence of a loan, the Fund would continue to receive the equivalent of the 
interest paid by the issuer on the securities loaned and would also receive 
compensation based on investment of cash collateral. 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 
could be earned currently from securities loans of this type justifies the 
attendant risk. If the Adviser determines to make securities loans, it is not 
intended that the value of the securities loaned would exceed 30% of the 
value of the Fund's total assets. 
    
Portfolio Trading: The Fund intends to fully manage its portfolio by buying 
and selling U.S. Government obligations, as well as holding selected 
obligations to maturity, and by engaging in transactions involving related 
options, futures and options on futures. In managing its portfolio the Fund 
seeks to maximize the return on its portfolio by taking advantage of market 
developments and yield disparities, which may include use of the following 
strategies: 
   
    (1) selling one type of U.S. Government security (e.g., Treasury bonds) 
  and buying another (e.g., GNMA direct pass-through certificates) when 
  disparities arise in the relative values of each; and 
    
    (2) changing from one U.S. Government obligation to an essentially 
  similar U.S. Government obligation when their respective yields are distorted 
  due to market factors. 

The Fund will also use the techniques described above under "Repurchase 
Agreements," "'When-Issued' Securities," "Options" and "Futures Contracts" to 
manage its portfolio. 

These strategies may result in increases or decreases in the Fund's current 
income available for distribution to the Fund's shareholders and in the 
holding by the Fund of obligations which sell at moderate to substantial 
premiums or discounts from face value. Moreover, if the Fund's expectations 
of changes in interest rates or its evaluation of the normal yield 
relationship between two obligations proves to be incorrect, the Fund's 
income, net asset value per share and potential capital gain may be decreased 
or its potential capital loss may be increased. 
   
The Fund will engage in portfolio trading if it believes a transaction net of 
costs will help in attaining its investment objectives. See "Portfolio 
Transactions and Brokerage Commissions." 
    


   
The objectives and the policies described above and the policies with respect 
to portfolio trading described above may be changed without shareholder 
approval. 
    
   
Investment Restrictions. The Fund has adopted the following restrictions 
which cannot be changed without the approval of the holders of a majority of 
its shares (which, as used in this SAI, means the lesser of (i) more than 50% 
of the outstanding shares of the Fund or of a class, as applicable, or (ii) 
67% or more of the outstanding shares of the Fund or of a class, as 
applicable, present at a meeting at which holders of more than 50% of the 
outstanding shares of the Fund or of a class, as applicable, are represented 
at such meeting in person or by proxy): 
    
The Fund may not: 

    (1) borrow money or pledge its assets except as a temporary measure for 
extraordinary or emergency purposes (the Fund intends to borrow money only 
from banks and only to accommodate requests for the repurchase of shares of 
the Fund while effecting an orderly liquidation of portfolio securities) (for 
the purpose of this restriction, collateral arrangements with respect to 
options, Futures Contracts, options on futures contracts and collateral 
arrangements with respect to initial and variation margins are not 

                                      9 
<PAGE>
 
considered a pledge of assets); for additional related restrictions, see 
paragraphs (i) and (ii) under the caption "State and Federal Restrictions"; 

    (2) purchase any security or evidence of interest therein on margin, 
except that the Fund may obtain such short-term credit as may be necessary 
for the clearance of purchases and sales of securities and except that the 
Fund may make deposits on margin in connection with Futures Contracts and 
related options; 
   
    (3) write, purchase or sell any put or call option or any combination 
thereof, provided that this shall not prevent the writing, purchasing and 
selling of puts, calls or combinations thereof with respect to Government 
securities and with respect to Futures Contracts or the purchase, ownership, 
holding or sale of contracts for the future delivery of fixed income 
securities; 
    
    (4) underwrite securities issued by other persons except insofar as the 
Fund may technically be deemed an underwriter under the Securities Act of 
1933 in selling a portfolio security; 

    (5) purchase or sell commodities or commodity contracts, except that the 
Fund may purchase and sell Futures Contracts and related options; 

    (6) make short sales of securities or maintain a short position, unless 
at all times when a short position is open it owns an equal amount of such 
securities or securities convertible into or exchangeable, without payment of 
any further consideration, for securities of the same issue as, and equal in 
amount to, the securities sold short, and unless not more than 10% of the 
Fund's net assets (taken at market value) is held as collateral for such 
sales at any one time (it is the present intention of management to make such 
sales only for the purpose of deferring realization of gain or loss for 
Federal income tax purposes; such sales would not be made of securities 
subject to outstanding options); 
   
    (7) make loans to other persons except through the lending of its 
portfolio securities not in excess of 30% of its total assets (taken at 
market value) and except through the use of repurchase agreements and 
provided that not more than 10% of the Fund's assets will be invested in 
repurchase agreements maturing in more than seven days (for these purposes 
the purchase of all or a portion of an issue of debt securities in accordance 
with the Fund's investment objectives and policies shall not be considered 
the making of a loan); 
    
    (8) knowingly invest in securities which are restricted securities under 
the Securities Act of 1933 if, as a result thereof, more than 10% of the 
Fund's total assets (taken at market value) would be so invested; 

    (9) purchase securities of any issuer if such purchase at the time 
thereof would cause more than 10% of the voting securities of such issuer to 
be held by the Fund; 

    (10) purchase securities of any issuer if such purchase at the time 
thereof would cause more than 5% of the Fund's assets (taken at market value) 
to be invested in the securities of such issuer (other than securities or 
obligations issued or guaranteed by the United States, any state or political 
subdivision thereof, or any political subdivision of any such state, or any 
agency or instrumentality of the United States or of any state or of any 
political subdivision of any state or the United States); or 

    (11) issue any senior security (as that term is defined in the 1940 Act), 
if such issuance is specifically prohibited by the 1940 Act or the rules and 
regulations promulgated thereunder (for the purpose of this restriction, 
collateral arrangements with respect to options, Futures Contracts and 
options on futures contracts and collateral arrangements with respect to 
initial and variation margin are not deemed to be the issuance of a senior 
security). 
   
The Fund has also adopted a policy which is fundamental and which provides 
that the Fund's assets will be invested in Government securities and related 
options, futures, options on futures and repurchase agreements. 
    
   
State and Federal Restrictions: In order to comply with certain state and 
federal statutes and policies, the Fund will not, as a matter of operating 
policy, (i) borrow money for any purpose in excess of 10% of its assets 
(taken at market value) moreover, the Fund will not purchase any securities 
for its portfolio at any time at which borrowings exceed 5% of its assets 
(taken at market value), (ii) pledge for any purpose in excess of 15% of its 
assets (taken at market value) (for the purpose of this restriction, 
collateral arrangements with respect to the writing of options, Futures 
Contracts, Options on Futures Contracts and collateral arrangements with 
respect to initial and variation margins are not considered a pledge of 
assets), (iii) invest more than 5% of its total assets at the time of 
investment in companies which, including predecessors, have a record of less 
than three years' continuous operation, (iv) purchase or retain in its 
portfolio any securities issued by an issuer any of whose officers, 
directors, trustees or security holders is an officer or Trustee of the 
Trust, or is an officer or Director of the Adviser if, after the purchase of 
the securities of such issuer by the Fund one or more of such persons owns 
beneficially more than 1/2 of 1% of the shares or securities, or both, of 
such issuer and such persons owning more than 1/2 of 1% of such shares or 
securities together own beneficially more than 5% of such shares or 
securities, or both, (v) invest for the purpose of exercising control or 
management, (vi) purchase securities issued by any registered investment 
company except by purchase in the open market where no commission or profit 
to a sponsor or dealer results from such purchase other than the customary 
broker's commission, or except when such purchase, though not made in the 
open market, is part of a plan of merger or consolidation; provided, however, 
that the Fund shall not purchase the securities of any registered investment 
company if such purchase at the time thereof would cause more than 10% of the 
net assets of the Fund (taken at market value) to be invested in the 
securities of such issuers or would cause more than 3% of the outstanding 
voting securities of any such issuer to be held by the Fund and, provided 
further, that the Fund shall not purchase securities issued by any open-end 
invest-
    

                                      10 
<PAGE>
 
ment company, or (vii) invest more than 10% of its assets (taken at market 
value) in securities (including repurchase agreements maturing in more than 
seven days) for which there are no readily available market quotations. These 
policies are not fundamental and may be changed by the Fund without 
shareholder approval in response to changes in the various state and federal 
requirements. 

Percentage Restriction: These investment 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. MANAGEMENT OF THE FUND 
   
The Trust's Board of Trustees provides broad supervision over the affairs of 
the Fund. The Adviser is responsible for the management of the Fund's assets, 
and the officers of the Fund are responsible for its operations. The Trustees 
and officers 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* 
Massachusetts Financial Services Company, Chairman 
    
   
RICHARD B. BAILEY* 
Private investor; Massachusetts Financial Services Company,  former Chairman 
(prior to September 30, 1991); Cambridge Bancorp, Director; Cambridge Trust 
Company, Director 
    

   
PETER G. HARWOOD 
Private Investor 
Address: 211 Lindsay Pond Road, Concord, Massachusetts 
    
   
J. ATWOOD IVES 
Eastern Enterprises (diversified holding company), Chairman and  Chief 
Executive Officer (since December 1991); General Cinema Corporation, Vice 
Chairman and Chief Financial Officer (prior to December 1991); The Neiman 
Marcus Group, Inc., Vice Chairman and Chief Financial Officer (prior to 
February 1992); United States Filter Corporation, Director 
Address: 9 Riverside Road, Weston, Massachusetts 
    
LAWRENCE T. PERERA 
Hemenway & Barnes (attorneys), Partner 
Address: 60 State Street, Boston, Massachusetts 
   
WILLIAM J. POORVU 
Harvard University Graduate School of Business Administration,  Adjunct 
Professor; CBL & Associates Properties, Inc. (a real estate investment 
trust), Director; The Baupost Fund (a registered investment company), Vice 
Chairman (since November 1993), Chairman and Trustee (prior to November 1993) 
Address: Harvard Business School, Soldiers Field Road, Cambridge, 
Massachusetts 
    
   
CHARLES W. SCHMIDT 
Private Investor; OHM Corporation, Director; The Boston Company, Director; 
Boston Safe Deposit and Trust Company, Director; Mohawk Paper Company, 
Director 
Address: 30 Colpitts Road, Weston, Massachusetts 
    
   
ARNOLD D. SCOTT* 
Massachusetts Financial Services Company, Senior Executive  Vice President, 
Secretary and Director 
    
   
JEFFREY L. SHAMES* 
Massachusetts Financial Services Company, President and Director 
    
   
ELAINE R. SMITH 
Independent Consultant; Brigham and Women's Hospital, Execu tive Vice 
President and Chief Operating Officer (prior to September 1992) 
Address: Weston, Massachusetts 
    
   
DAVID B. STONE 
North American Management Corp. (investment adviser),  Chairman and Director; 
Eastern Enterprises, Director 
Address: Ten Post Office Square, Suite 300, Boston, Massachusetts 
    
Officers 

W. THOMAS LONDON,* Treasurer 
Massachusetts Financial Services Company, Senior Vice President 

STEPHEN E. CAVAN,* Secretary and Clerk 
Massachusetts Financial Services Company, Senior Vice President, Assistant 
Secretary and General Counsel 

JAMES R. BORDEWICK, JR.,* Assistant Secretary 
Massachusetts Financial Services Company, Vice President and  Associate 
General Counsel 

JAMES O. YOST,* Assistant Treasurer 
Massachusetts Financial Services Company, Vice President 

*"Interested persons" (as defined in the 1940 Act) of the Adviser, whose 
address is 500 Boylston Street, Boston, Massachusetts 02116. 

Each Trustee and officer holds comparable positions with certain MFS 
affiliates or with certain other funds of which MFS or a subsidiary of MFS is 
the investment adviser or distributor. Messrs. Brodkin, Scott and Cavan are 
the Chairman, a Director and the Secretary, respectively, of MFD and hold 
similar positions with certain other MFS affiliates. Mr. Bailey is a director 
of Sun Life Assurance Company of Canada (U.S.) ("Sun Life of Canada (U.S.)"), 
the corporate parent of MFS. 
   
The Fund pays the compensation of non-interested Trustees and Mr. Bailey (who 
currently receive a fee of $3,250 per year plus $165 per meeting and $130 per 
committee meeting attended, together with such Trustee's out-of-pocket 
expenses) and has adopted a retirement plan for non-interested Trustees and 
Mr. Bailey. Under this plan, a Trustee will retire upon reaching age 73 and 
if the Trustee has completed at least 5 years of service, he would be 
entitled to annual payments during his lifetime of up to 50% of such 
Trustee's average annual compensation (based on the three years prior to his 
retirement) depending on his length of service. A Trustee may also retire 
prior to age 73 and receive reduced payments if he has completed at least 5 
years of service. Under the plan, a Trustee (or his beneficiaries) will also 
receive benefits for a period of time in the event the Trustee is disabled or 
dies. These benefits will also be based on the Trustee's average 
    

                                      11 
<PAGE>
   
annual compensation and length of service. There is no retirement plan 
provided by the Fund for Messrs. Brodkin, Scott and Shames. The Fund will 
accrue compensation expenses each year to cover current years service and 
amortize past service cost. 
    
   
Set forth in Appendix A hereto is certain information concerning the cash 
compensation paid to the Trustees and benefits accrued, and estimated 
benefits payable under the retirement plan. 
    
   
As of October 31, 1995, all Trustees and officers as a group owned less than 
1% of the outstanding shares of the Fund. As of October 31, 1995, Merrill 
Lynch, Pierce, Fenner & Smith, Inc., P.O. Box 45286, Jacksonville, FL., was 
the record owner of approximately 7.62% of the outstanding Class A shares of 
the Fund. Merrill Lynch, Pierce, Fenner & Smith, Inc., P.O. Box 45286, 
Jacksonville, FL., was the record owner of approximately 11.42% of the 
outstanding Class B shares of the Fund. 
    
The Fund's Declaration of Trust provides that it 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 
Fund, unless, as to liabilities to the Fund 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 Fund. In the case of settlement, such 
indemnification will not be provided unless it has been determined by a court 
or other body approving the settlement or other disposition or by reasonable 
determination by non-interested Trustees or in a written opinion of 
independent counsel based upon a review of readily available facts, 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 wholly owned subsidiary of Sun Life of Canada 
(U.S.), which is a wholly owned subsidiary of Sun Life Assurance Company of 
Canada ("Sun Life"). 
   
The Adviser manages the Fund pursuant to an Investment Advisory Agreement, 
dated December 19, 1985, as amended (the "Advisory Agreement"). The Adviser 
provides the Fund with overall investment advisory and administrative 
services, as well as general office facilities. Subject to such policies as 
the Trustees may determine, the Adviser makes investment decisions for the 
Fund. For its services and facilities, the Adviser receives a management fee, 
computed and paid monthly, equal to, commencing January 1, 1996, 0.45% of the 
Fund's average daily net asset value; through December 31, 1995, the Adviser 
will be receiving a higher management fee equal to the lesser of (i) 0.65% of 
the Fund's average daily net assets or (ii) 0.30% of the Fund's average daily 
net assets and 6.1% of the Fund's gross income (i.e., income other than gains 
from the sale of securities, short-term gains from options and futures 
transactions and premium income from options written), in every case on an 
annualized basis for the Fund's then-current fiscal year. 
    
   
For the Fund's fiscal year ended November 30, 1993, MFS received management 
fees of $7,174,766, equivalent, on an annualized basis, to 0.65% of the 
Fund's average daily net assets. If MFS had not reduced its management fee 
for the Fund's fiscal year ended November 30, 1993, MFS would have received 
management fees under the Advisory Agreement of $7,932,214 (of which 
$3,188,777 would have been based on average daily net assets and $4,743,437 
on gross income), equivalent, on an annualized basis, to 0.72% of the Fund's 
average daily net assets. For the eight months ended July 31, 1994, MFS 
received management fees of $8,155,351, equivalent on an annualized basis, to 
0.65% of the Fund's average daily net assets. If MFS had not reduced its 
management fees for the eight months ended July 31, 1994, MFS would have 
received management fees under the Advisory Agreement of $8,248,819 (of which 
$2,351,580 was based on average daily net assets and $5,897,239 in gross 
income), equivalent, or an annualized basis, to 0.66% of the Fund's average 
daily net assets. For the Fund's fiscal year ended July 31, 1995, MFS 
received management fees of $9,450,684, equivalent, on an annualized basis, 
to 0.65% of the Fund's average daily net assets. 
    
In order to comply with the expense limitations of certain state securities 
commissions, the Adviser will reduce its management fee or otherwise 
reimburse the Fund for any expenses, exclusive of interest, taxes and 
brokerage commissions, incurred by the Fund in any fiscal year to the extent 
such expenses exceed the most restrictive of such state expense limitations. 
The Adviser will make appropriate adjustments to such reimbursements in 
response to any amendment or rescission of the various state requirements. 
Any such adjustment would not become effective until the beginning of the 
Fund's next fiscal year following the date of such amendments or the date on 
which such requirements become no longer applicable. 
   
The Fund pays all of its expenses (other than those assumed by MFS or MFD), 
including: Trustees fees discussed above; governmental fees; interest 
charges; taxes; membership dues in the Investment Company Institute allocable 
to the Fund; fees and expenses of independent auditors, of legal counsel, and 
of any transfer agent, registrar and dividend disbursing agent of the Fund; 
expenses of repurchasing and redeeming shares and servicing shareholder 
accounts; expenses of preparing, printing and mailing share certificates, 
shareholder reports, notices, proxy statements to shareholders and reports 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 State Street Bank and 
Trust Company, the Fund's custodian, for all services to the Fund, including 
safekeeping of funds and securities and maintaining required books and 
accounts; expenses of calculating the net asset value of shares of the Fund; 
and expenses of shareholder meetings. Expenses relating to the issuance, 
registration and qualification of shares of the Fund and the preparation, 
printing and mailing of prospectuses for such purposes are borne by the Fund 
except that the Fund's Distribution Agreement with MFD requires MFD to pay 
for prospectuses that are to be used for sales purposes. For a list of the 
Fund's expenses, including the compensation paid to the Trustees who are not 
officers of the Adviser, during its fiscal year ended July 31, 1995, see 
"Financial Statements--Statement of Operations" in the Annual Report to 
shareholders incorporated by reference into this SAI. Payment by 
    

                                      12 
<PAGE>
 
the Fund of brokerage commissions for brokerage and research services of 
value to the Adviser in serving its clients is discussed under the caption 
"Portfolio Transactions and Brokerage Commissions" below. 

The Adviser pays the compensation of the Fund's officers and of any Trustee 
who is an officer of MFS. The Adviser 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 the Fund's investments, 
effecting the Fund's portfolio transactions and, in general, administering 
the Fund's affairs. 
   
The Advisory Agreement will remain in effect until August 1, 1996, 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 Fund's outstanding voting securities 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 may be terminated without penalty by vote 
of a majority of the Fund's outstanding voting securities or by either party 
on not more than 60 days' nor less than 30 days' written notice. The Advisory 
Agreement provides that if MFS ceases to serve as the Adviser to the Fund, 
the Fund will change its name so as to delete the initials "MFS". The 
Advisory Agreement further provides that MFS may render services to others 
and may permit fund clients in addition to the Fund to use the initials "MFS" 
in their names. The Advisory Agreement also provides that neither the Adviser 
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 Fund. 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. 
    
Custodian 

State Street Bank and Trust Company (the "Custodian") is the custodian of the 
Fund's assets. The Custodian's responsibilities include safekeeping and 
controlling the Fund's cash and securities, handling the receipt and delivery 
of securities, determining income and collecting interest and dividends on 
the Fund's 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 each class of shares of the Fund. The Custodian does 
not determine the investment policies of the Fund or decide which securities 
the Fund will buy or sell. The Fund may, however, invest in securities, 
including repurchase agreements, issued by the Custodian and may deal with 
the Custodian as principal in securities transactions. The Custodian also 
acts as the dividend disbursing agent of the Fund. The Custodian has 
contracted with the Adviser for the Adviser to perform certain accounting 
functions related to options transactions for which the Adviser receives 
remuneration on a cost basis. 

Shareholder Servicing Agent 
   
MFS Service Center, Inc. (the "Shareholder Servicing Agent"), a wholly owned 
subsidiary of MFS, is the Fund's shareholder servicing agent, pursuant to a 
Shareholder Servicing Agent Agreement, dated September 1, 1995 (the "Agency 
Agreement") with the Fund. 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 each class of shares of the Fund. For these 
services, the Shareholder Servicing Agent will receive a fee based on the net 
assets of each class of shares of the Fund computed and paid monthly. In 
addition, the Shareholder Servicing Agent is reimbursed by the Fund for 
certain expenses incurred by the Shareholder Servicing Agent on behalf of the 
Fund. State Street Bank and Trust Company, the dividend and distribution 
disbursing agent of the Fund has contracted with the Shareholder Servicing 
Agent to administer and perform certain dividend and distribution disbursing 
functions for the Fund. 
    
Distributor 
   
MFD, a wholly owned subsidiary of MFS, serves as the distributor for the 
continuous offering of shares of the Fund pursuant to a Distribution 
Agreement, dated September 1, 1995 (the "Distribution Agreement"), with the 
Fund. Prior to January 1, 1995, MFS Financial Services, Inc. ("FSI"), another 
wholly owned subsidiary of MFS, was the Fund's distributor. Where this SAI 
refers to MFD in relation to the receipt or payment of money with respect to 
a period or periods prior to January 1, 1995, such reference shall be deemed 
to include FSI, as the predecessor in interest to MFD. 
    
   
Class A Shares: MFD acts as agent in selling Class A shares of the Fund to 
dealers. The public offering price of Class A shares of the Fund is their net 
asset value next computed after the sale plus a sales charge which varies 
based upon the quantity purchased. The public offering price of a Class A 
share of the Fund is calculated by dividing the net asset value of a Class A 
share by the difference (expressed as a decimal) between 100% and the sales 
charge percentage of offering price applicable to the purchase (see 
"Purchases" in the Prospectus). The sales charge scale set forth in the 
Prospectus applies to purchases of Class A shares of the Fund alone or in 
combination with shares of all classes of certain other funds in the MFS 
Family of Funds (the "MFS Funds") and other Funds (as noted under Right of 
Accumulation). A group might qualify to obtain quantity sales charge 
discounts (see "Investment and Withdrawal Programs" in this SAI). 
    
Class A shares of the Fund may be sold at their net asset value to certain 
persons or in certain instances as described in the Prospectus. Such sales 
are made without a sales charge to promote good will with employees and 
others with whom MFS, MFD and/or the Fund have business relationships, and 
because the sales effort, if any, involved in making such sales is 
negligible. 

MFD allows discounts to dealers (which are alike for all dealers) from the 
applicable public offering price of the Class A shares. Dealer allowances 
expressed as a percentage of offering price for all offering prices are set 
forth in the Prospectus (see "Purchases"). The commission paid to the 
underwriter is the difference between the total amount invested and the sum 
of (a) the net proceeds to the Fund and (b) the dealer commission. Because 

                                      13 
<PAGE>
of rounding in the computation of offering price, the portion of the sales 
charge paid to the underwriter may vary and the total sales charge may be 
more or less than the sales charge calculated using the sales charge 
expressed as a percentage of offering price or as a percentage of the net 
amount invested as listed in the Prospectus. In the case of the maximum sales 
charge, the dealer retains 4% and MFD retains approximately 3/4 of 1% of the 
public offering price. In addition, MFD pays a commission to dealers who 
initiate and are responsible for purchases of $1 million or more as described 
in the Prospectus. 

Class B Shares: MFD acts as agent in selling Class B shares of the Fund. The 
public offering price of Class B shares is their net asset value next 
computed after the sale (see "Purchases" in the Prospectus). 

General: Neither MFD nor dealers are permitted to delay placing orders to 
benefit themselves by a price change. On occasion, MFD may obtain brokers 
loans from various banks, including the custodian banks for the MFS Funds, to 
facilitate the settlement of sales of shares of the Fund to dealers. MFD may 
benefit from its temporary holding of funds paid to it by investment dealers 
for the purchase of Fund shares. 
   
During the Fund's fiscal year ended July 31, 1995, MFD and certain other 
financial institutions received net commissions of $28,014 and $135,524, 
respectively (as their concession on gross commissions of $163,538). The Fund 
received $21,705,476, representing the aggregate net asset value of such 
shares. During the eight months ended July 31, 1994, MFD and certain other 
financial institutions received net commissions of $23,519 and $115,433, 
respectively (as their concession on gross commissions of $138,952). The Fund 
received $14,129,666, representing the aggregate net asset value of such 
shares. During the Fund's fiscal year ended November 30, 1993, MFD and 
certain other financial institutions received net commissions of $58,847 and 
$291,008, respectively (as their concession on gross commissions of 
$349,855). The Fund received $29,744,427, representing the aggregate net 
asset value of such shares. 
    
   
The Distribution Agreement will remain in effect until September 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 Fund's shares (as defined in "Investment Restrictions") and, in either 
case, by a majority of the Trustees who are not parties to the 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. 
    
4. PORTFOLIO TRANSACTIONS AND 
BROKERAGE COMMISSIONS 

Specific decisions to purchase or sell securities for the Fund are made by a 
portfolio manager who is an employee of the Adviser and who is appointed and 
supervised by its senior officers. Changes in the Fund's investments are 
reviewed by the Board of Trustees. The Fund's portfolio manager may serve 
other clients of the Adviser or any subsidiary of the Adviser in a similar 
capacity. 
   
The primary consideration in placing portfolio security transactions is 
execution at the most favorable prices. The Adviser has complete freedom as 
to the markets in and broker-dealers through which it seeks this result. U.S. 
Government securities are traded principally in the over-the-counter market 
on a net basis through dealers acting for their own account and not as 
brokers. The cost of securities purchased from underwriters includes an 
underwriter's commission or concession, and the prices at which securities 
are purchased and sold from and to dealers include a dealer's mark-up or 
mark-down. The Adviser attempts to negotiate with underwriters to decrease 
the commission or concession for the benefit of the Fund. The Adviser 
normally seeks to deal directly with the primary market makers unless, in its 
opinion, better prices are available elsewhere. Subject to the requirement of 
seeking execution at the most favorable price, securities may, as authorized 
by the Advisory Agreement, be bought from or sold to dealers who have 
furnished statistical, research and other information or services to the 
Adviser. At present no arrangements for the recapture of commission payments 
are in effect. 
    
   
Consistent with the foregoing primary consideration, the Rules of Fair 
Practice of the National Association of Securities Dealers and such other 
policies as the Trustees may determine, the Adviser may consider sales of 
shares of the Fund and of the other investment company clients of MFD as a 
factor in the selection of broker-dealers to execute the Fund's portfolio 
transactions. 
    
   
In certain instances there may be securities which are suitable for the 
Fund's portfolio as well as for that of one or more of the other clients of 
the Adviser or any subsidiary of the Adviser. Investment decisions for the 
Fund 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 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 the Fund is concerned. In 
some cases, however, the Fund believes that its ability to participate in 
volume transactions will produce better executions for the Fund. 
    
5. SHAREHOLDER SERVICES 
   
Investment and Withdrawal Programs -- The Fund makes available the following 
programs designed to enable shareholders to add to their investment or 
withdraw from it with a minimum of paper work. These are described below and, 
in certain cases, in the Fund's Prospectus. The programs involve no extra 
charge to shareholders (other than a sales charge in the case of certain 
Class A share purchases) and may be changed or discontinued at any time by a 
shareholder or the Fund. 
    
 Letter of Intent: If a shareholder (other than a group purchaser described 
below) anticipates purchasing $100,000 or more of Class A shares of the Fund 
alone or in combination with the current offer-

                                      14 
<PAGE>
 
ing price value of all holdings of all classes of shares of other MFS Funds 
or the MFS Fixed Fund (a bank collective investment fund) within a 13-month 
period (or 36-month period, in the case of purchases of $1 million or more), 
the shareholder may obtain Class A shares of the Fund at the same reduced 
sales charge as though the total quantity were invested in one lump sum by 
completing the Letter of Intent section of the Fund's Account Application or 
filing a separate Letter of Intent application (available from the 
Shareholder Servicing Agent) within 90 days of the commencement of purchases. 
Subject to acceptance by MFD and the conditions mentioned below, each 
purchase will be made at a public offering price applicable to a single 
transaction of the dollar amount specified in the Letter of Intent 
application. The shareholder or his dealer must inform MFD that the Letter of 
Intent is in effect each time shares are purchased. The shareholder makes no 
commitment to purchase additional shares, but if his purchases within 13 
months (or 36-months in the case of purchases of $1 million or more) plus the 
value of shares credited toward completion of the Letter of Intent do not 
total the sum specified, he will pay the increased amount of the sales charge 
as described below. Instructions for issuance of shares in the name of a 
person other than the person signing the Letter of Intent application must be 
accompanied by a written statement from the dealer stating that the shares 
were paid for by the person signing such Letter. Neither income dividends nor 
capital gain distributions taken in additional shares will apply toward the 
completion of the Letter of Intent. Dividends and distributions of other MFS 
Funds automatically reinvested in shares of the Fund pursuant to the 
Distribution Investment Program will also not apply toward completion of the 
Letter of Intent. 
   
Out of the shareholder's initial purchase (or subsequent purchases if 
necessary), 5% of the dollar amount specified in the Letter of Intent 
application shall be held in escrow by the Shareholder Servicing Agent in the 
form of shares registered in the shareholder's name. All income dividends and 
capital gain distributions on escrowed shares will be paid to the shareholder 
or to his order. When the minimum investment so specified is completed 
(either prior to or by the end of the 13-month period or 36-month period, as 
applicable), the shareholder will be notified and the escrowed shares will be 
released. 
    
If the intended investment is not completed, the Shareholder Servicing Agent 
will redeem an appropriate number of the escrowed shares in order to realize 
such difference. Shares remaining after any such redemption will be released 
by the Shareholder Servicing Agent. By completing and signing the Account 
Application or separate Letter of Intent application, the shareholder 
irrevocably appoints the Shareholder Servicing Agent his attorney to 
surrender for redemption any or all escrowed shares with full power of 
substitution in the premises. 

 Right of Accumulation: A shareholder qualifies for cumulative quantity 
discounts on the purchase of Class A shares when the shareholder's new 
investment, together with the current offering price value of all holdings of 
all classes of shares of that shareholder in the MFS Funds or the MFS Fixed 
Fund (a bank collective investment fund) reaches a discount level. See 
"Purchases" in the Prospectus for the sales charges on quantity discounts. 
For example, if a shareholder owns shares valued at $75,000 and purchases an 
additional $25,000 of Class A shares of the Fund, the sales charge for the 
$25,000 purchase would be at the rate of 4% (the rate applicable to single 
transactions of $100,000). A shareholder must provide the Shareholder 
Servicing Agent (or his investment dealer must provide MFD) with information 
to verify that the quantity sales charge discount is applicable at the time 
the investment is made. 
   
 Distribution Investment Program: Distributions of dividends and capital 
gains made by the Fund with respect to a particular class of shares may be 
automatically invested in shares of the same class of one of the other MFS 
Funds if shares of the fund are available for sale. Such investments will be 
subject to additional purchase minimums. Distributions invested in shares of 
one of the other MFS Funds will be invested at net asset value (exclusive of 
any sales charge) and will not be subject to any contingent deferred sales 
charge. Distributions will be invested at the close of business on the 
payable date for the distribution. A shareholder considering the Distribution 
Investment Program should obtain and read the prospectus of the other fund 
and consider the differences in objectives and policies before making any 
investment. 
    
   
 Systematic Withdrawal Plan: A shareholder may direct the Shareholder 
Servicing Agent to send him (or anyone he designates) regular periodic 
payments based upon the value of his account. Each payment under a Systematic 
Withdrawal Plan ("SWP") must be at least $100, except in certain limited 
circumstances. The aggregate withdrawals of Class B shares in any year 
pursuant to a SWP generally are limited to 10% of the value of the account at 
the time of the establishment of the SWP. SWP are drawn from the proceeds of 
the redemption of shares held in the shareholder's account (which would be a 
return of principal and, if reflecting a gain, would be taxable). Redemptions 
of Class B shares will be made in the following order: (i) any "Free Amount"; 
(ii) to the extent necessary, any "Reinvested Shares"; and (iii) to the 
extent necessary, the "Direct Purchase" subject to the lowest CDSC (as such 
terms are defined in "Contingent Deferred Sales Charge" in the Prospectus). 
The CDSC will be waived in the case of redemptions of Class B shares pursuant 
to a SWP but will not be waived in the case of SWP redemptions of Class A 
shares which are subject to a CDSC. To the extent that redemptions for such 
periodic withdrawals exceed dividend income reinvested in the account, such 
redemptions will reduce and may eventually exhaust the number of shares in 
the shareholder's account. All dividend and capital gain distributions for an 
account with a SWP will be reinvested in additional full and fractional 
shares of the Fund at the net asset value in effect at the close of business 
on the record date for such distributions. To initiate this service, shares 
having an aggregate value of at least $5,000 either must be held on deposit 
by, or certificates for such shares must be deposited with, the Shareholder 
Servicing Agent. With respect to Class A shares, maintaining a withdrawal 
plan concurrently with an investment program would be disadvantageous because 
of the sales charges included in share purchases and the imposition of a CDSC 
on certain redemptions. The shareholder may deposit into the account 
additional shares of the Fund, change the payee or change the dollar amount 
of each payment. The Shareholder Servicing Agent may charge the account for 
services rendered and expenses incurred beyond those normally assumed by the 
Fund with respect to the liquidation of shares. No charge is currently 
assessed against 
    

                                      15 
<PAGE>
 
the account, but one could be instituted by the Shareholder Servicing Agent 
on 60 days' notice in writing to the shareholder in the event that the Fund 
ceases to assume the cost of these services. The Fund may terminate any SWP 
for an account if the value of the account falls below $5,000 as a result of 
share redemptions (other than as a result of a SWP) or an exchange of shares 
of the Fund for shares of another MFS Fund. Any SWP may be terminated at any 
time by either the shareholder or the Fund. 

 Invest by Mail: Additional investments of $50 or more may be made at any 
time by mailing a check payable to the Fund directly to the Shareholder 
Servicing Agent. The shareholder's account number and the name of his 
investment dealer must be included with each investment. 

 Group Purchases: A bona fide group and all its members may be treated as a 
single purchaser and, under the Right of Accumulation (but not a Letter of 
Intent), obtain quantity sales charge discounts on the purchase of Class A 
shares if the group (1) gives its endorsement or authorization to the 
investment program so it may be used by the investment dealer to facilitate 
solicitation of the membership, thus effecting economies of sales effort; (2) 
has been in existence for at least six months and has a legitimate purpose 
other than to purchase mutual fund shares at a discount; (3) is not a group 
of individuals whose sole organizational nexus is as credit cardholders of a 
company, policyholders of an insurance company, customers of a bank or 
broker-dealer, clients of an investment adviser or other similar groups; and 
(4) agrees to provide certification of membership of those members investing 
money in the MFS Funds upon the request of MFD. 

 Automatic Exchange Plan: Shareholders having account balances of at least 
$5,000 in any MFS Fund may exchange their shares for the same class of other 
MFS Funds under the Automatic Exchange Plan. The Automatic Exchange Plan 
provides for automatic exchanges of funds from the shareholder's account in 
an MFS Fund for investment in the same class of shares of other MFS Funds 
selected by the shareholder. Under the Automatic Exchange Plan, exchanges of 
at least $50 each may be made to up to four different funds effective on the 
seventh day of each month or of every third month, depending whether monthly 
or quarterly exchanges are elected by the shareholder. If the seventh day of 
the month is not a business day, the transaction will be processed on the 
next business day. Generally, the initial exchange will occur after receipt 
and processing by the Shareholder Servicing Agent of an application in good 
order. Exchanges will continue to be made from a shareholder's account from 
any MFS Fund as long as the balance of the account is sufficient to complete 
the exchanges. Additional payments made to a shareholder's account will 
extend the period that exchanges will continue to be made under the Automatic 
Exchange Plan. However, if additional payments are added to an account 
subject to the Automatic Exchange Plan shortly before an exchange is 
scheduled, such funds may not be available for exchanges until the following 
month; therefore, care should be used to avoid inadvertently terminating the 
Automatic Exchange Plan through exhaustion of the account balance. 

No transaction fee for exchanges will be charged in connection with the 
Automatic Exchange Plan. However, exchanges of shares of MFS Money Market 
Fund, MFS Government Money Market Fund and Class A shares of MFS Cash Reserve 
Fund will be subject to any applicable sales charge. Changes in amounts to be 
exchanged to each fund, the funds to which exchanges are to be made and the 
timing of transfers (monthly or quarterly), or termination of a shareholder's 
participation in the Automatic Exchange Plan will be made after instructions 
in writing or by telephone (an "Exchange Change Request") are received by the 
Shareholder Servicing Agent in proper form (i.e., if in writing-- signed by 
the record owner(s) exactly as shares are registered; if by telephone-- 
proper account identification is given by the dealer or shareholder of 
record). Each Exchange Change Request (other than termination of 
participation in the program) must involve at least $50. Generally, if an 
Exchange Change Request is received by telephone or in writing before the 
close of business on the last business day of a month, the Exchange Change 
Request will be effective for the following month's exchange. 

A shareholder's right to make additional investments in any of the MFS Funds, 
to make exchanges of shares from one MFS Fund to another and to withdraw from 
an MFS Fund, as well as a shareholder's other rights and privileges are not 
affected by a shareholder's participation in the Automatic Exchange Plan. 

The Automatic Exchange Plan is part of the Exchange Privilege. For additional 
information regarding the Automatic Exchange Plan, including the treatment of 
any CDSC, see "Exchange Privilege" below. 

 Reinstatement Privilege: Shareholders of the Fund and shareholders of the 
other MFS Funds (except MFS Money Market Fund, MFS Government Money Market 
Fund and Class A shares of MFS Cash Reserve Fund in the case where such 
shares of the money market funds are acquired through direct purchase or 
reinvested dividends) who have redeemed their shares have a one-time right to 
reinvest the redemption proceeds in the same class of shares of any of the 
MFS Funds (if shares of the fund are available for sale) at net asset value 
(without a sales charge) and, if applicable, with credit for any CDSC paid. 
In the case of proceeds reinvested in MFS Money Market Fund, MFS Government 
Money Market Fund and Class A shares of MFS Cash Reserve Fund, the 
shareholder has the right to exchange the acquired shares for shares of 
another MFS Fund at net asset value pursuant to the exchange privilege 
described below. Such a reinvestment must be made within (90) days of the 
redemption and is limited to the amount of the redemption proceeds. If the 
shares credited for any CDSC paid are then redeemed within six years of the 
initial purchase in the case of Class B shares or 12 months of the initial 
purchase in the case of certain Class A shares, a CDSC will be imposed upon 
redemption. Although redemptions and repurchases of shares are taxable 
events, a reinvestment within a certain period of time in the same fund may 
be considered a "wash sale" and may result in the inability to recognize 
currently all or a portion of a loss realized on the original redemption for 
federal income tax purposes. Please see your tax adviser for further 
information. 

Exchange Privilege--Subject to the requirements set forth below, some or all 
of the shares in an account with the Fund for which payment has been received 
by the Fund (i.e., an established account) may be exchanged for shares of the 
same class of any 

                                      16 
<PAGE>
 
of the other MFS Funds (if available for sale) at their net asset value. 
Exchanges will be made only after instructions in writing or by telephone (an 
"Exchange Request") are received for an established account by the 
Shareholder Servicing Agent. 

Each Exchange Request must be in proper form (i.e., if in writing--signed by 
the record owner(s) exactly as the shares are registered; if by 
telephone--proper account identification is given by the dealer or 
shareholder of record), and each exchange must involve either shares having 
an aggregate value of at least $1,000 or all the shares in the account 
(except that the minimum is $50 for accounts of retirement plan participants 
whose sponsoring organizations subscribe to the MFS FUNDamental 401(k) Plan 
or another similar 401(k) recordkeeping system made available by the 
Shareholder Servicing Agent). Each exchange involves the redemption of the 
shares of the Fund to be exchanged and the purchase at net asset value (i.e., 
without a sales charge) of the shares of the other MFS Fund. Any gain or loss 
on the redemption of the shares exchanged is reportable on the shareholder's 
federal income tax return, unless such shares were and the shares received in 
the exchange are held in a tax-deferred retirement plan. If the Exchange 
Request is received by the Shareholder Servicing Agent prior to the close of 
regular trading on the Exchange, the exchange usually will occur on that day 
if all the requirements set forth above have been complied with at that time. 
However, payment of the redemption proceeds by the Fund, and thus the 
purchase of shares of the other MFS Fund, may be delayed for up to seven days 
if the Fund determines that such a delay would be in the best interest of all 
its shareholders. Investment dealers which have satisfied criteria 
established by MFD may also communicate a shareholder's Exchange Request to 
MFD by facsimile subject to the requirements set forth above. 

No CDSC is imposed on exchanges among the MFS Funds, although liability for 
the CDSC is carried forward to the exchanged shares. For purposes of 
calculating the CDSC upon redemption of shares acquired in an exchange, the 
purchase of shares acquired in one or more exchanges is deemed to have 
occurred at the time of the original purchase of the exchanged shares. 

Additional information with respect to any of the MFS Funds, including a copy 
of its current prospectus, may be obtained from investment dealers or the 
Shareholder Servicing Agent. A shareholder considering an exchange should 
obtain and read the prospectus of the other MFS Fund and consider the 
differences in objectives and policies before making any exchange. 
Shareholders of the other MFS Funds (except shares of MFS Money Market Fund, 
MFS Government Money Market Fund and Class A shares of MFS Cash Reserve Fund 
acquired through direct purchase and dividends reinvested prior to June 1, 
1992) have the right to exchange their shares for shares of the MFS Funds, 
subject to the conditions, if any, set forth in their respective 
prospectuses. In addition, unitholders of the MFS Fixed Fund have the right 
to exchange their units (except units acquired through direct purchases) for 
shares of the Fund, subject to the conditions, if any, imposed upon such 
unitholders by the MFS Fixed Fund. 

Any state income tax advantages for investment in shares of each 
state-specific series of MFS Municipal Series Trust may only benefit 
residents of such states. Investors should consult with their own tax 
advisers to be sure this is an appropriate investment, based on their 
residency and each state's income tax laws. 

The exchange privilege (or any aspect of it) may be changed or discontinued 
and is subject to certain limitations (see "Purchases" in the Prospectus). 

Tax-Deferred Retirement Plans -- Shares of the Fund may be purchased by all 
types of tax-deferred retirement plans. MFD makes available through 
investment dealers plans and/or custody agreements for the following: 

  Individual Retirement Accounts (IRA) (for individuals and their 
non-employed spouses who desire to make limited contributions to a 
tax-deferred retirement program and, if eligible, to receive a federal income 
tax deduction for amounts contributed); 

  Simplified Employee Pension (SEP-IRA) Plans; 

  Retirement Plans Qualified under Section 401(k) of the Internal Revenue 
Code of 1986, as amended; 

  403(b) Plans (deferred compensation arrangements for employees of public 
school systems and certain non-profit organizations); and Certain other 
qualified pension and profit-sharing plans. 

The plan documents provided by MFD designate a trustee or custodian (unless 
another trustee or custodian is designated by the individual or group 
establishing the plan) and contain specific information about the plans. Each 
plan provides that dividends and distributions will be reinvested 
automatically. For further details with respect to any plan, including fees 
charged by the trustee, custodian or MFD, tax consequences and redemption 
information, see the specific documents for that plan. Plan documents other 
than those provided by MFD may be used to establish any of the plans 
described above. Third party administrative services, available for some 
corporate plans, may limit or delay the processing of transactions. 

Investors should consult with their tax advisers before establishing any of 
the tax-deferred retirement plans described above. 
   
6. TAX STATUS 
    
   
The Fund has elected to be treated and intends to qualify each year 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 the Fund's gross 
income, the amount of Fund distributions, and the composition and holding 
period of the Fund's portfolio assets. Because the Fund 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 the Fund will be required to pay any federal income 
or excise taxes. If the Fund should fail to qualify as a "regulated 
investment company" in any year, the Fund would incur a regular corporate 
federal income tax upon its taxable income and Fund distributions would 
generally be taxable as ordinary dividend income to the shareholders. 
    
Shareholders of the Fund normally will have to pay federal income taxes, and 
any state or local taxes, on the dividends and capital gain distributions 
they receive from the Fund. Dividends from 

                                      17 
<PAGE>
   
income and any distributions from net short-term capital gains, whether paid 
in cash or in additional shares are taxable to the Fund's shareholders as 
ordinary income for federal income tax purposes. Because the Fund expects to 
earn primarily interest income, it is expected that no Fund dividends will 
qualify for the dividends received deduction for corporations. Distributions 
of net capital gains (i.e., the excess of net long-term capital gains over 
net short-term capital losses), whether paid in cash or in additional shares, 
are taxable to the Fund's shareholders as long-term capital gains for 
federal income tax purposes regardless of how long they have owned shares in 
the Fund. Fund dividends declared in October, November, or December of any 
calendar year, that are payable to shareholders of record in such a month, 
and that are paid the following January, will be taxable to shareholders as 
if received on December 31 of the year in which they are declared. 
    
   
Any dividend or distribution will have the effect of reducing the per share 
net asset value of shares in the Fund by the amount of the dividend or 
distribution. Shareholders purchasing shares shortly before the record date 
of any taxable dividend or other distribution may thus pay the full price for 
the shares and then effectively receive a portion of the purchase price back 
as a taxable distribution. 
    
   
In general, any gain or loss realized upon a taxable disposition of shares of 
the Fund by a shareholder that holds such shares as a capital asset will be 
treated as long-term capital gain or loss if the shares have been held for 
more than twelve months and otherwise as a short-term capital gain or loss. 
However, any loss realized upon a disposition of shares in the Fund held for 
six months or less will be treated as a long-term capital loss to the extent 
of any distributions of net capital gain made with respect to those shares. 
Any loss realized upon a redemption of shares may also be disallowed under 
rules relating to wash sales. Gain may be increased (or loss reduced) upon a 
redemption of Class A shares of the Fund within ninety days after their 
purchase followed by any purchase (including purchases by exchange or by 
reinvestment) without payment of an additional sales charge of Class A shares 
of the Fund or of another MFS Fund (or any other shares of an MFS Fund 
generally sold subject to a sales charge). 
    
   
The Fund's current dividend and accounting policies will affect the amount, 
timing, and character of distributions to shareholders, and may, under 
certain circumstances, make an economic return of capital taxable to 
shareholders. Any Fund investment in zero coupon securities, certain stripped 
securities and certain securities purchased at a market discount will cause 
the Fund to realize 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 Fund, the Fund 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 Fund. 
    
   
Investment in residual interests of a CMO that has elected to be treated as a 
real estate mortgage investment conduit, or "REMIC", can create complex tax 
problems, especially if the Fund has state or local governments or other 
tax-exempt organizations as investors. 
    
   
The Fund's transactions in options and Futures Contracts will be subject to 
special tax rules that may affect the amount, timing and character of Fund 
income and distributions to shareholders. For example, certain positions held 
by the Fund 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 the Fund 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 Fund losses, adjustments in the holding 
periods of Fund securities, and conversion of short-term into long-term 
capital losses. Certain tax elections exist for straddles that may alter the 
effects of these rules. The Fund will limit its activities in options, 
Futures Contracts, and swaps and related transactions to the extent necessary 
to meet the requirements of Subchapter M of the Code. 
    
Dividends and certain other payments to persons who are not citizens or 
residents of the United States or U.S. entities ("Non-U.S. Persons") are 
generally subject to U.S. tax withholding at a rate of 30%. The Fund intends 
to withhold U.S. federal income at the rate of 30% on taxable dividends and 
other payments to Non-U.S. Persons that are subject to such withholding, 
regardless of whether a lower treaty rate may be permitted. Any amounts 
overwithheld may be recovered by such persons by filing a claim for refund 
with the U.S. Internal Revenue Service within the time period appropriate to 
such claims. 
   
The Fund is also required in certain circumstances to apply backup 
withholding at a rate of 31% on taxable dividends and redemption proceeds 
paid to any shareholder (including a Non-U.S. Person) who does not furnish 
to the Fund certain information and certifications or who is otherwise 
subject to backup withholding. Backup withholding will not, however, be 
applied to payments that have been subject to 30% withholding. Distributions 
received from the Fund by Non-U.S. Persons also may be subject to tax under 
the laws of their own jurisdiction. 
    
As long as it qualifies as a regulated investment company under the Code, the 
Fund will not be required to pay Massachusetts income or excise taxes. 

Distributions of the Fund that are derived from interest on obligations of 
the U.S. Government and certain of its agencies and instrumentalities (but 
generally not from capital gains realized upon the disposition of such 
obligations) may be exempt from state and local taxes in certain states. The 
Fund intends to advise shareholders of the extent, if any, to which its 
distributions consist of such interest. Shareholders are urged to consult 
their tax advisers regarding the possible exclusion of such portion of their 
dividends for state and local income tax purposes, as well as regarding the 
tax consequences of an investment in the Fund. 

7. DETERMINATION OF NET ASSET VALUE AND 
PERFORMANCE 
   
Net Asset Value: The net asset value per share of each class of the Fund is 
determined each day during which the Exchange is open for trading. As of the 
date of this SAI, the Exchange is open 
    

                                      18 
<PAGE>
 
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 and Christmas 
Day. 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 liabilities 
attributable to the class from the value of the Fund's assets attributable to 
the class and dividing the difference by the number of shares of the class 
outstanding. Debt securities (other than short-term obligations) in the 
Fund's 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-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, since such valuations are believed to reflect the fair value of such 
securities. Use of the pricing service has been approved by the Board of 
Trustees. Positions in listed options, Future Contracts and Options on 
Futures Contracts will normally be valued at the settlement price on the 
exchange on which they are primarily traded. Positions in over-the-counter 
options will be valued using dealer supplied valuations. Short-term 
obligations with a remaining maturity in excess of 60 days will be valued 
based upon dealer supplied valuations. Other short-term obligations in the 
Fund's portfolio are valued at amortized cost, which constitutes fair value 
as determined by the Board of Trustees. Portfolio securities and other assets 
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 Board of Trustees. 
A share's net asset value is effective for orders received by the dealer 
prior to its calculation and received by MFD, the Fund's principal 
underwriter or its agent, the Shareholder Servicing Agent, prior to the close 
of that business day. 
   
Total Rate of Return: The Fund will calculate its total rate of return for 
each class of 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 and reflecting the CDSC or 
the maximum public offering price) to reach the value of that investment at 
the end of the periods. The Fund may also calculate (i) a total rate of 
return, which is not reduced by the CDSC (4% maximum for Class B shares 
purchased on and after January 1, 1993) and therefore may result in a higher 
rate of return, (ii) with respect to Class A shares, a total rate of return 
assuming an initial account value of $1,000, which will result in a higher 
rate of return since the value of the initial account will not be reduced by 
the sales charge (4.75% maximum), and/or (iii) total rates of return which 
represent aggregate performance over a period or year-by-year performance, 
and which may or may not reflect the effect of the maximum or other sales 
charge or CDSC. Effective March 1, 1993, the Fund revised its investment 
policy of investing in securities issued or guaranteed by the U.S. Government 
and its agencies, authorities and instrumentalities and engaging in 
transactions involving related options, to its current policy of investing at 
least 65% of its assets, under normal circumstances, in GNMA securities and 
obligations fully collateralized by GNMAs. The average annual total rate of 
return for Class A shares, reflecting the initial investment at the maximum 
public offering price, for the one-year and five-year periods ended July 31, 
1995 and for the period from January 9, 1986 (the Fund's commencement of 
investment operations) to July 31, 1995 was 4.46%, 6.46%, and 6.53%, 
respectively. The average annual total rate of return for Class A shares, not 
giving effect to the initial sales charge, for the one-year and five-year 
periods ended July 31, 1995 and for the period from January 9, 1986 (the 
Fund's commencement of investment operations) to July 31, 1995 was 9.60%, 
7.50% and 7.08%, respectively. The Fund's average annual total rate of return 
for Class B shares, reflecting the CDSC, for the one-year period and for the 
period from September 7, 1993 to July 31, 1995 was 4.81% and 1.36%, 
respectively. The Fund's average annual total rate of return for Class B 
shares, not giving effect to the CDSC, for the one-year period and for the 
period September 7, 1993 to July 31, 1995 was 8.81% and 3.33%, respectively. 
The total rates of return presented above for Class A shares, may not be 
indicative of future performance. 
    
   
Performance Results: The performance results for Class A shares below, based 
on an assumed initial investment of $10,000, cover the period from January 9, 
1986 to December 31, 1994. It has been assumed that capital gain 
distributions and income dividends were reinvested in additional shares. 
These performance results, as well as any yield or total rate of return 
quotation provided by the Fund, should not be considered as representative of 
the performance of the Fund in the future since the net asset value and 
public offering price of shares of the Fund will vary based not only on the 
type, quality and maturities of the securities held in the Fund's portfolio, 
but also on changes in the current value of such securities and on changes in 
the expenses of the Fund. These factors and possible differences in the 
methods used to calculate yields and total rates of return should be 
considered when comparing the yield and total rate of return of the Fund to 
yields and total rates of return published for other investment companies or 
other investment vehicles. Total rate of return reflects the performance of 
both principal and income. Current net asset value and account balance 
information may be obtained by calling 1-800-MFS-TALK (637-8255). 
    
<PAGE>


                         MFS Government Mortgage Fund 

<TABLE>
<CAPTION>
                                  Value of 
                   Value of      Reinvested 
                   Initial         Capital      Value of 
Period ended       $10,000          Gains     Reinvested     Total 
December 31       Investment   Distributions   Dividends     Value 
- -------------     -----------    ------------    --------   -------- 
<S>                 <C>              <C>         <C>        <C>     
1986*               $9,750           $0          $ 1,001    $10,751 
1987                 8,261            0            2,214     10,475 
1988                 7,762            0            3,499     11,261 
1989                 7,792            0            4,968     12,760 
1990                 7,052            0            6,159     13,211 
1991                 7,142            0            7,823     14,965 
1992                 6,873            0            8,992     15,865 
1993                 6,853            0           10,137     16,990 
1994                 6,233            0           10,386     16,619 
</TABLE>
*For the period from the start of business, January 9, 1986, to December 31, 
1986. 

Explanatory notes: The results in the table assume that the initial 
investment has been reduced by the current maximum sales 

                                      19 
<PAGE>
 
charge (4.75%) and take into account the annual Rule 12b-1 fees. No 
adjustment has been made for any income taxes payable by shareholders. 
   
Yield: Any yield quotation for a class of shares of the Fund is based on the 
annualized net investment income per share of that class over a 30-day 
period. The yield is calculated by dividing the net investment income per 
share allocated to a particular class of the Fund earned during the period by 
the maximum offering price per share of such class on the last day of that 
period. The resulting figure is then annualized. Net investment income per 
share of a class is determined by dividing (i) the dividends and interest 
earned by the Fund allocated to the class during the period, minus accrued 
expenses of such class for the period, by (ii) the average number of shares 
of such class entitled to receive dividends during the period multiplied by 
the maximum offering price per share of such class on the last day of the 
period. The Fund's yield calculations assume a maximum sales charge of 4.75% 
in the case of Class A shares and no payment of any CDSC in the case of Class 
B shares. The yield calculation for Class A shares for the 30-day period 
ended July 31, 1995 was 6.19%. The yield calculation for Class B shares for 
the 30-day period ended July 31, 1995 was 5.77%. 
    
   
Current Distribution Rate: Yield, which is calculated according to a formula 
prescribed by the SEC, is not indicative of the amounts which were or will be 
paid to the Fund's shareholders. Amounts paid to shareholders of each class 
are reflected in the quoted "current distribution rate" for that class. The 
current distribution rate for a class is computed by dividing the total 
amount of dividends per share paid by the Fund to shareholders of that class 
during the past twelve months by the maximum public offering price of that 
class at the end of such period. Under certain circumstances, such as when 
there has been a change in the amount of dividend payout, or a fundamental 
change in investment policies, it might be appropriate to annualize the 
dividends paid over the period such policies were in effect, rather than 
using the dividends during the past twelve months. The current distribution 
rate differs from the yield computation because it may include distributions 
to shareholders from sources other than dividends and interest, such as 
premium income for option writing, short-term capital gains and return of 
invested capital, and is calculated over a different period of time. The 
Fund's current distribution rate calculation for Class A shares assumes a 
maximum sales charge of 4.75%. The Fund's current distribution rate 
calculation for Class B shares assumes no CDSC is paid. The current 
distribution rate for Class A shares and the Class B shares of the Fund for 
the twelve-month period ended July 31, 1995 was 6.50% and 5.79% respectively. 
    
   
General: From time to time the Fund 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., 
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. Fund performance may also be compared to the performance 
of other mutual funds tracked by financial or business publications or 
periodicals. 
    
   
From time to time, the Fund 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 Fund; the Fund's 
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. 
    
The Fund may also quote evaluations mentioned in independent radio or 
television broadcasts. 

From time to time the Fund may use charts and graphs to illustrate the past 
performance of various indices such as those mentioned above and 
illustrations using hypothetical rates of return to illustrate the effects of 
compounding and tax-deferral. 

The Fund may advertise examples of the effects of periodic investment plans, 
including the principle of dollar cost averaging. In such a program, an 
investor invests a fixed dollar amount in a fund at periodic intervals, 
thereby purchasing fewer shares when prices are high and more shares when 
prices are low. While such a strategy does not assure a profit or guard 
against a loss in a declining market, the investor's average cost per share 
can be lower than if fixed numbers of shares are purchased at the same 
intervals. 

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 Securities Act of 1933 ("Truth in Securities Act" or "Full 
Disclosure Act"). 

 -- 1936 -- Massachusetts Investors Trust is the first mutual fund to allow 
shareholders to take capital gain distributions either in additional shares 
or in cash. 

 -- 1976 -- MFS 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. 

                                      20 
<PAGE>
 
- -- 1981 -- MFS World Governments Fund is established as America's first 
globally diversified fixed-income mutual fund. 

 -- 1984 -- MFS Municipal High Income Fund is the first open end mutual fund 
to seek high tax-free income from lower-rated municipal securities. 

 -- 1986 -- MFS Managed Sectors Fund becomes the first mutual fund to target 
and shift investments among industry sectors for shareholders. 

 -- 1986 -- MFS Municipal Income Trust is the first closed-end, high-yield 
municipal bond fund traded on the New York Stock Exchange. 

 -- 1987 -- MFS 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 World Total Return Fund is the first global balanced fund. 

 -- 1993 -- MFS 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 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. 

8. DISTRIBUTION PLANS 

   
The Trustees have adopted separate Distribution Plans for Class A and Class B 
shares (the "Distribution Plans") pursuant to Section 12(b) of the 1940 Act 
and Rule 12b-1 thereunder (the "Rule") after having concluded that there is a 
reasonable likelihood that each Distribution Plan would benefit the Fund and 
the respective class of shareholders. The Distribution Plans are designed to 
promote sales, thereby increasing the net assets of the Fund. Such an 
increase may reduce the Fund's expense ratio to the extent that the Fund's 
fixed costs are spread over a larger net asset base. Also, an increase in net 
assets may lessen the adverse effect that could result were the Fund required 
to liquidate portfolio securities to meet redemptions. There is, however, no 
assurance that the net assets of the Fund will increase or that the other 
benefits referred to above will be realized. 
    

   
The Distribution Plans are described in the Prospectus under the caption 
"Distribution Plans," which is incorporated herein by reference. The 
following information supplements this Prospectus discussion. 
    

   
Service Fees: With respect to the Class A Distribution Plan, no service fees 
will be paid: (i) to any dealer who is the holder or dealer of record for 
investors who own Class A shares having an aggregate net asset value less 
than $750,000, or such other amount as may be determined from time to time by 
MFD (MFD, however, may waive this minimum amount requirement from time to 
time if the dealer satisfies certain criteria); or (ii) to any insurance 
company which has entered into an agreement with the Fund and MFD that 
permits such insurance company to purchase Class A shares from the Fund at 
their net asset value in connection with annuity agreements issued in 
connection with the insurance company's separate accounts. Dealers may from 
time to time be required to meet certain other criteria in order to receive 
service fees. 
    

   
With respect to the Class B Distribution Plan, except in the case of the 
first year service fee, no service fees will be paid to any securities dealer 
who is the holder or dealer of record for investors who own Class B shares 
having an aggregate net asset value of less than $750,000 or such other 
amount as may be determined by MFD from time to time. MFD, however, may waive 
this minimum amount requirement from time to time if the dealer satisfies 
certain criteria. Dealers may from time to time be required to meet certain 
other criteria in order to receive service fees. 
    

   
MFD or its affiliates shall be entitled to receive any service fee payable 
under any Distribution Plan for which there is no dealer of record or for 
which qualification standards have not been met as partial consideration for 
personal services and/or account maintenance services performed by MFD or its 
affiliates for shareholder accounts. 
    

   
Distribution Fees: The purpose of distribution payments to MFD under the 
Distribution Plans is to compensate MFD for its distribution services to the 
Fund. MFD pays commissions to dealers as well as expenses of printing 
prospectuses and reports used for sales purposes, expenses with respect to 
the preparation and printing of sales literature and other distribution 
related expenses, including, without limitation, the cost necessary to 
provide distribution-related services, or personnel, travel, office expense 
and equipment. 
    
   
Distribution and Service Fees Paid During the Fund's Last Fiscal Year: During 
the fiscal year ended July 31, 1995, the Fund paid the following Distribution 
Plan expenses: 
<TABLE>
<CAPTION>
                             Amount of 
                          Distribution     Amount of 
                                and      Distribution      Amount of 
                              Service     and Service    Distribution 
                             Fees Paid        Fees        and Service 
                                By          Retained     Fees Received 
Distribution Plans             Fund          by MFD       by Dealers 
- ------------------------     ----------    -----------   ------------- 
<S>                        <C>             <C>           <C>
  Class A Distribution 
  Plan                     $ 1,435,563     $  516,081     $  919,482 
  Class B Distribution 
  Plan                     $10,437,906     $8,004,343     $2,433,563 
</TABLE>

General: Each of the Distribution Plans will remain in effect until August 1, 
1996, and will continue in effect thereafter only if such continuance is 
specifically approved at least annually by vote of both the Trustees and a 
majority of the Trustees who are not "interested persons" or financially 
interested parties of such Plan ("Distribution Plan Qualified Trustees"). 
Each of the Distribution Plans also requires that the Fund and MFD each shall 
provide the Trustees, and the Trustees shall review, at least quarterly, a 
written report of the amounts expended (and purposes therefor) under such 
Plan. Each of the Distribution Plans may be terminated at any time by vote of 
a majority of the Distribution Plan Qualified Trustees or by vote of the 
holders of a majority of the respective class of the Fund's shares 
    

                                      21 
<PAGE>
   
(as defined in "Investment Restrictions"). All agreements relating to any of 
the Distribution Plans entered into between the Fund or MFD and other 
organizations must be approved by the Board of Trustees, including a majority 
of the Distribution Plan Qualified Trustees. Agreements under any of the 
Distribution Plans must be in writing, will be terminated automatically if 
assigned, and may be terminated at any time without payment of any penalty, 
by vote of a majority of the Distribution Plan Qualified Trustees or by vote 
of the holders of a majority of the respective class of the Fund's shares. 
None of the Distribution Plans may be amended to increase materially the 
amount of permitted distribution expenses without the approval of a majority 
of the respective class of the Fund's shares (as defined in "Investment 
Restrictions") or may be materially amended in any case without a vote of the 
Trustees and a majority of the Distribution Plan Qualified Trustees. The 
selection and nomination of Distribution Plan Qualified Trustees shall be 
committed to the discretion of the non-interested Trustees then in office. No 
Trustee who is not an "interested person" has any financial interest in any 
of the Distribution Plans or in any related agreement. 
    
9. DESCRIPTION OF SHARES, VOTING RIGHTS AND LIABILITIES 

The Fund's Declaration of Trust permits the Trustees 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 Declaration of 
Trust further authorizes the Trustees to classify or reclassify the shares of 
the Fund into one or more classes. Pursuant thereto, the Trustees have 
authorized the issuance of two classes of shares of the Fund, Class A shares 
and Class B shares. Each share of a class of the Fund represents an equal 
proportionate interest in the assets of the Fund allocable to that class. 
Upon liquidation of the Fund, shareholders of each class are entitled to 
share pro rata in the net assets of the Fund allocable to such class 
available for distribution to shareholders. The Fund has reserved the right 
to create and issue series and additional 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. Although Trustees are not elected annually by the shareholders, 
the Declaration of Trust provides that a Trustee may be removed from office 
at a meeting of shareholders by a vote of two-thirds of the outstanding 
shares of the Fund. A meeting of shareholders will be called upon the request 
of shareholders of record holding in the aggregate not less than 10% of the 
outstanding voting securities of the Fund. No material amendment may be made 
to the Fund's Declaration of Trust without the affirmative vote of a majority 
of the Fund's outstanding shares (as defined in "Investment Objectives, 
Policies and Restrictions-- Investment Restrictions"). Shares have no pre- 
emptive or conversion rights (except as described in "Purchases-- Conversion 
of Class B Shares" in the Prospectus). Shares when issued 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 or the 
affected series. If not so terminated the Trust will continue indefinitely. 
    
   
The Fund 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 Fund's Declaration of Trust contains an express 
disclaimer of shareholder liability for acts or obligations of the Fund and 
provides for indemnification and reimbursement of expenses out of Fund 
property for any shareholder held personally liable for the obligations of 
the Fund. The Fund's 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 Fund. Its shareholders, 
Trustees, officers, employees and agents covering possible tort and 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 Fund itself was unable to meet its 
obligations. 
    
The Fund's Declaration of Trust further provides that obligations of the Fund 
are not binding upon the Trustees individually but only upon the property of 
the Fund and that the Trustees will not be liable for errors of judgment or 
mistakes of fact or law, 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. 
<PAGE>

10. INDEPENDENT ACCOUNTANTS AND FINANCIAL STATEMENTS 

Deloitte & Touche LLP are the Fund's independent certified public 
accountants. 
   
The Portfolio of Investments at July 31, 1995, the Statement of Assets and 
Liabilities at July 31, 1995, the Statement of Operations for the year ended 
July 31, 1995, the Statement of Changes in Net Assets for the year ended July 
31, 1995, the eight months ended July 31, 1994 and the year ended November 
30, 1993, the Notes to Financial Statements and the Independent Auditors' 
Report, each of which is included in the Annual Report to shareholders of the 
Fund, 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. 
    

                                      22 
<PAGE>
 
Appendix A 

TRUSTEE COMPENSATION TABLE 
<TABLE>
<CAPTION>
                                                  Retirement 
                                                   Benefit 
                                                  Accrued as 
                                                     part            Estimated           Total Trustee 
                               Trustee Fees        of Fund         Credited Years        Fees from Fund 
Trustee                        from Fund (1)     Expense (1)       of Service (2)     and Fund Complex (3) 
 --------------------------   --------------     --------------   ----------------   --------------------- 
<S>                               <C>               <C>                  <C>                <C>
Richard B. Bailey                 $6,280            $  987                8                 $226,221 
A. Keith Brodkin                       0                 0               N/A                       0 
Peter G. Harwood                   6,580               650                5                  105,812 
J. Atwood Ives                     6,250             1,009               17                  106,482 
Lawrence T. Perera                 5,950             2,592               22                   96,592 
William Poorvu                     6,580             2,607               22                  106,482 
Charles W. Schmidt                 6,280             2,477               15                   98,397 
Arnold D. Scott                        0                 0               N/A                       0 
Jeffrey L. Shames                      0                 0               N/A                       0 
Elaine R. Smith                    6,280               964               27                   98,397 
David B. Stone                     6,580             1,516               11                  104,007 
</TABLE>
(1)For fiscal year ended July 31, 1995. 
[/R]
(2)Based on normal retirement age of 73. 
   
(3)For calendar year 1994. All Trustees receiving compensation served as 
Trustees of 20 funds within the MFS fund complex (having aggregate net assets 
at December 31, 1994, of approximately $14 Billion) except Mr. Bailey, who 
served as Trustee of 56 funds within the MFS fund complex (having aggregate 
net assets at December 31, 1994, of approximately $24 Billion). 
    
   
       Estimated Annual Benefits Payable by Fund upon Retirement ((4)) 
<TABLE>
<CAPTION>
                           Years of Service 
   Average 
 Trustee Fees      3       5        7      10 or more 
- -------------     ----    -----    -----   ----------- 
<S>            <C>      <C>      <C>       <C>
$5,350         $  803   $1,338   $1,873      $2,675 
5,726             859    1,432    2,004       2,863 
6,102             915    1,526    2,136       3,051 
6,478             972    1,620    2,267       3,239 
6,854           1,028    1,714    2,399       3,427 
7,230           1,085    1,808    2,531       3,615 
</TABLE>
    
(4)Other funds in the MFS fund complex provide similar retirement benefits to 
the Trustees. 
                                      23 
<PAGE>
 
Investment Adviser 
Massachusetts Financial Services Company 
500 Boylston Street, Boston, MA 02116 
(617) 954-5000 

Distributor 
MFS Fund Distributors, Inc. 
500 Boylston Street, Boston, MA 02116 
(617) 954-5000 

Custodian and 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: 800-225-2606 
Mailing Address 
P.O. Box 2281, Boston, MA 02107-9906 

Independent Accountants 
Deloitte & Touche LLP 
125 Summer Street, Boston, MA 02110 

MFS(R) 
Government 
Mortgage Fund 

500 Boylston Street 
Boston, MA 02116 

[MFS LOGO]
The First Name in Mutual Funds


<PAGE>

<PAGE>
                                                   ANNUAL REPORT FOR
[LOGO] M F S (SM)                                         YEAR ENDED
THE FIRST NAME IN MUTUAL FUNDS                         JULY 31, 1995

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

MFS (R) GOVERNMENT MORTGAGE FUND

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

[GRAPHIC OMITTED: A photo of a building with columns.]
<PAGE>
<TABLE>
MFS(R) GOVERNMENT MORTGAGE FUND
<C>
TRUSTEES                                                     <C>
A. Keith Brodkin* - Chairman and President                   CUSTODIAN
                                                             State Street Bank and Trust Company
Richard B. Bailey* - Private Investor;
Former Chairman and Director (until 1991),                   AUDITORS
Massachusetts Financial Services Company                     Deloitte & Touche LLP

Peter G. Harwood - Private Investor                          INVESTOR  INFORMATION
                                                             For MFS stock and bond market outlooks,
J. Atwood Ives - Chairman and Chief Executive                call toll free: 1-800-637-4458 anytime from
Officer, Eastern Enterprises                                 a touch-tone telephone.

Lawrence T. Perera - Partner,                                For information on MFS mutual funds,
Hemenway & Barnes                                            call your financial adviser or, for an
                                                             information kit, call toll free:
William J. Poorvu - Adjunct Professor, Harvard               1-800-637-2929 any business day from
University Graduate School of Business                       9 a.m. to 5 p.m. Eastern time (or leave
Administration                                               a message anytime).

Charles W. Schmidt - Private Investor;                       INVESTOR  SERVICE
Former Senior Vice President and Group                       MFS Service Center, Inc.
Executive (until 1990), Raytheon Company                     P.O. Box 2281
                                                             Boston, MA 02107-9906
Arnold D. Scott* - Senior Executive Vice
President and Secretary, Massachusetts                       For general information, call toll free:
Financial Services Company                                   1-800-225-2606 any business day from
                                                             8 a.m. to 8 p.m. Eastern time.
Jeffrey L. Shames* - President, Massachusetts
Financial Services Company                                   For service to speech- or hearing-impaired,
                                                             call toll free: 1-800-637-6576 any business
Elaine R. Smith  - Independent Consultant                    day from 9 a.m. to 5 p.m. Eastern time.
                                                             (To use this service, your phone must be
David B. Stone - Chairman, North American                    equipped with a Telecommunications Device for
Management Corp. (Investment Advisers)                       the Deaf.)

INVESTMENT  ADVISER                                          For share prices, account balances and
Massachusetts Financial Services Company                     exchanges, call toll free: 1-800-MFS-TALK
500 Boylston Street                                          (1-800-637-8255) anytime from a touch-tone
Boston, Massachusetts 02116-3741                             telephone.

DISTRIBUTOR
MFS Fund Distributors, Inc.
500 Boylston Street
Boston, Massachusetts 02116-3741
                                                             -------------------------------------------
PORTFOLIO  MANAGER                                                   TOP-RATED SERVICE
James J. Calmas*                                             [SEAL]  MFS was rated first when securities
                                                                     firms evaluated the quality of
TREASURER                                                            service they receive from 40
W. Thomas London*                                                    mutual fund companies. MFS got
                                                                     high marks for answering calls
ASSISTANT  TREASURER                                                 quickly, processing transactions
James O. Yost*                                                       accurately and sending statements
                                                                     out on time.
SECRETARY                                                                   (Source: 1994 DALBAR Survey)
Stephen E. Cavan*                                            -------------------------------------------

ASSISTANT  SECRETARY
James R. Bordewick, Jr.*

*Affiliated with the Investment Adviser
</TABLE>
<PAGE>
LETTER TO SHAREHOLDERS

Dear Shareholders:
Following a difficult year of rising interest rates and declining prices in
1994, the bond markets have shown improvement in 1995, as signs of a weaker
U.S. economy have pointed to a more positive outlook for inflation and as
investors have anticipated the Federal Reserve Board's July 6 reduction in
short-term interest rates. As a result of these developments, interest rates
declined and bond prices rose in the first several months of 1995. The
mortgage market, which closely follows the Treasury market, has shown similar
improvement and the Fund ended its fiscal year with positive returns. For the
12 months ended July 31, 1995, Class A shares of the Fund provided a total
return of +9.60%, while Class B shares had a total return of +8.81%. Both of
these returns, which include the reinvestment of distributions but exclude the
effects of any sales charges, underperformed the Lehman Brothers Government
National Mortgage Association (GNMA) Index, an unmanaged index of GNMA issues
with more than $50 million outstanding, which returned +10.58% in the same
period. A discussion of the Fund's performance relative to the GNMA Index may
be found in the Portfolio Performance and Strategy section of this letter.
Performance information for the Fund is provided on pages four and five of
this report.

Economic Outlook
Moderate, but sustainable, growth appears to be the hallmark of the economic
expansion's fifth year. Consumer spending and homebuying showed only modest
gains through July 31, while businesses continued to work off excess inventories
and reduce factory output. Meanwhile, overseas economies, particularly those of
Germany and Japan, have not recovered as expected, limiting U.S. export growth.
However, we believe the Federal Reserve's consistent and, so far, successful
efforts to fight inflation seem to be giving consumers and businesses enough
confidence to help maintain 2 1/2% to 3% real (adjusted for inflation) growth in
gross domestic product through 1995.

Interest Rates
Although the Federal Reserve implemented a one-quarter percentage point
decrease in short-term interest rates in July, the effects of its seven rate
increases, which began in late 1993 and ended in February of this year, are
still being felt throughout the economy. While there have been some increases
in commodity prices, companies have not been able to pass along most of those
higher costs, partly because of the need to keep fighting for market share,
but also because wages and benefits of U.S. workers continue to grow at rates
that are near or perhaps below the inflation rate, limiting consumer buying
power. At the end of July, the nation's employment cost index had risen at a
rate of just 2.8% over the previous year, helping to contain cost pressures.
At the same time, however, the bond markets have perceived isolated signs of
more rapid economic growth as possible harbingers of increasing inflation, and
have slightly bid up longer-term interest rates. Although previous monetary
easing by the Federal Reserve has been followed by additional rate reductions,
prospects for further decreases in the current environment are uncertain.
Still, with long-term government bonds yielding approximately 7%, in an
environment of 2 1/2% to 3% inflation, we believe real rates of return in the
fixed-income markets could remain relatively attractive.

Portfolio Performance and Strategy
The slight underperformance of Class A and Class B shares of the Fund relative
to the GNMA Index during the year ended July 31, 1995 was partly the result of
a strategy designed to maintain a relatively short duration at the beginning
of 1995. This strategy was undertaken to help avoid potential losses that
might result from further increases in interest rates. As a result of this
conservative strategy, the Fund did not fully participate in the beginning of
the bond market rally, although Class A shares of the Fund did outperform the
average GNMA fund tracked by Lipper Analytical Services, Inc., an independent
firm that monitors mutual fund performance. (Refer to the table on page five
for performance results.) Although the Fund's duration was lengthened as
interest rates began to decline in anticipation of the Federal Reserve's
interest rate cut, duration has since been reduced again, making the Fund less
sensitive to additional changes in interest rates. Currently, the portfolio
has an interest rate sensitivity similar to that of a 6-year Treasury.
(Principal value and interest on Treasury securities are guaranteed by the
U.S. government if held to maturity.)

     On the whole, the mortgage market has performed well during the bond market
rally as investors have been looking for additional yield in an environment
where the supply of higher-yielding mortgage-backed securities has been low.
This was a result of a slowdown in housing sales and mortgage refinancings, both
of which saw a great deal of activity in 1992 and 1993, largely satisfying the
pent-up demand that existed up to that point.

     In coming months, we anticipate maintaining the Fund's fairly conservative
strategy with relatively short durations, while keeping approximately 80% of the
portfolio in mortgage securities. We believe these returns should compare
favorably with those of other fixed-income investments. At the same time, during
a period of relative uncertainty about the near-term outlook for the economy and
interest rates, we are holding fewer longer-term (greater than 20-year)
securities to reduce the portfolio's exposure to possible changes in shorter-
and longer-term interest rates.

     We appreciate your support and welcome any questions or comments you may
have.

Respectfully,

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

[A photo of                   [A photo of
 A. Keith Brodkin,             James J. Calmas,
 Chairman and President.]      Portfolio Manager.]

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


/s/ A. Keith Brodkin           /s/ James J. Calmas
A. Keith Brodkin               James J. Calmas
Chairman and President         Portfolio Manager

August 10, 1995



PORTFOLIO MANAGER PROFILE

James Calmas joined the MFS Fixed Income Department in 1988. A graduate of
Dartmouth College and the Amos Tuck School of Business Administration of
Dartmouth College, he was named Assistant Vice President - Investments in
1991. In 1993, he was named Vice President - Investments and Portfolio Manager
of MFS Government Mortgage Fund.

OBJECTIVES AND POLICIES

The Fund's primary investment objective is to provide a high level of current
income. The Fund's secondary objective is to protect shareholders' capital.
Any investment involves risk and there can be no assurance that the Fund will
achieve its objectives.

The Fund seeks to achieve its investment objectives by investing, under normal
circumstances, at least 65% of its total assets in obligations issued or
guaranteed by the Government National Mortgage Association (GNMA) and in
obligations fully collateralized or otherwise fully secured by obligations
issued or guaranteed by the GNMA. The Fund may also invest in other securities
that are issued or guaranteed by the U.S. government, its agencies,
authorities or instrumentalities. Depending on market conditions, the Fund may
temporarily invest a substantial portion of its assets in cash, short-term
government securities and related repurchase agreements.

TAX FORM SUMMARY

In January 1996, shareholders will be mailed a Tax Form Summary reporting the
federal tax status of all distributions paid during the calendar year 1995.

FEDERAL INCOME TAX INFORMATION ON DISTRIBUTIONS

For the year ended July 31, 1995, the distributions from ordinary income of
Class A and Class B shares were $27,183,924 and $63,697,419, respectively.

PERFORMANCE

The information on the following page illustrates the historical performance
of MFS Government Mortgage Fund Class A shares in comparison to various market
indicators. Class A share results reflect the deduction of the 4.75% maximum
sales charge; benchmark comparisons are unmanaged and do not reflect any fees
or expenses. You cannot invest in an index. All results reflect the
reinvestment of all dividends and capital gains.

Class B shares were offered effective September 7, 1993. Information on Class
B share performance appears on the next page.
<PAGE>
GROWTH OF A HYPOTHETICAL $10,000 INVESTMENT
(For the Period from January 9, 1986 to July 31, 1995)

[GRAPHIC OMITTED:]
Line graph representing the growth of a $10,000 investment for the period from
January 1, 1986 to July 31, 1995. The graph is scaled from $5,000 to $30,000 in
$5,000 segments. The years are marked from 1986 to 1995. There are three lines
drawn to scale. One is a solid line representing MFS Government Mortgage Fund
(Class A), a second line of short dashes represents the Lehman Brothers GNMA
Index, and a third line of long dashes represents the Consumer Price Index.
              MFS Government Mortgage Fund        $18,309
              Lehman Brothers GNMA Index          $23,744
              Consumer Price Index                $13,953


<TABLE>
AVERAGE ANNUAL TOTAL RETURNS
<CAPTION>
                                                                                        Life of Class
                                                                                              through
                                                1 Year       3 Years       5 Years            7/31/95
- -----------------------------------------------------------------------------------------------------------
<S>                                            <C>            <C>           <C>                <C>
MFS Government Mortgage Fund (Class A)
  including 4.75% sales charge                 + 4.46%        +4.09%        +6.46%             +6.53%<F1>
- -----------------------------------------------------------------------------------------------------------
MFS Government Mortgage Fund (Class A)
  at net asset value                           + 9.60%        +5.81%        +7.50%             +7.08%<F1>
- -----------------------------------------------------------------------------------------------------------
MFS Government Mortgage Fund (Class B)
  with CDSC<F3>                                + 4.81%          --            --               +1.36%<F2>
- -----------------------------------------------------------------------------------------------------------
MFS Government Mortgage Fund (Class B)
  without CDSC                                 + 8.81%          --            --               +3.33%<F2>
- -----------------------------------------------------------------------------------------------------------
Average GNMA fund                              + 9.25%        +5.46%        +7.90%             +8.19%<F4>
- -----------------------------------------------------------------------------------------------------------
Lehman Brothers GNMA Index                     +10.58%        +6.37%        +8.75%             +9.44%<F4>
- -----------------------------------------------------------------------------------------------------------
Consumer Price Index<F5>                       + 2.76%        +2.77%        +3.18%             +3.54%<F4>
- -----------------------------------------------------------------------------------------------------------
<FN>
<F1> For the period from the commencement of offering of Class A shares, January 9, 1986 to July 31, 1995.
<F2> For the period from the commencement of offering of Class B shares, September 7, 1993 to July 31, 1995.
<F3> These returns reflect the current maximum Class B contingent deferred sales charge (CDSC) of 4%.
<F4> Benchmark comparisons begin on January 1, 1986.
<F5> The Consumer Price Index is a popular measure of change in prices.
</FN>
</TABLE>

In the above table, we have included the average annual total returns of all
GNMA funds (including the Fund) tracked by Lipper Analytical Services, Inc. for
the applicable time periods (50, 36, 31 and 18 funds for the 1-, 3- and 5-year
periods ended July 31, 1995, and for the period from January 1, 1986 through
July 31, 1995, respectively). Because these returns do not reflect any
applicable sales charges, we have also included the Fund's results at net asset
value (no sales charge) for comparison. All results are historical and,
therefore, are not an indication of future results. The principal value and
income return of an investment in a mutual fund will vary with changes in market
conditions, and shares, when redeemed, may be worth more or less than their
original cost.
<PAGE>
<TABLE>
<CAPTION>
PORTFOLIO OF INVESTMENTS - July 31, 1995
Bonds - 97.3%
- -----------------------------------------------------------------------------------------
                                                         Principal Amount
Issuer                                                      (000 Omitted)           Value
- -----------------------------------------------------------------------------------------
<S>                                                              <C>       <C>
Federal Home Loan Mortgage Corporation - 15 Year - 2.2%
  FHLMC, 9s, 2001 - 2006                                         $ 28,249  $   29,458,774
- -----------------------------------------------------------------------------------------
Federal Home Loan Mortgage Corporation - 30 Year - 0.1%
  FHLMC, 8.5s, 2009 - 2017                                       $     63  $       64,882
  FHLMC, 9s, 2020 - 2021                                              861         889,044
  FHLMC, 9.5s, 2015 - 2021                                            440         458,086
                                                                           --------------
                                                                           $    1,412,012
- -----------------------------------------------------------------------------------------
Federal Housing Authority - 1.9%
  FHA, Centennial, "A", 8.25s, 2028+                             $ 23,895  $   25,109,400
- -----------------------------------------------------------------------------------------
Federal National Mortgage Association - 15 Year - 2.1%
  FNMA, 8.5s, 2004 - 2008                                        $    517  $      534,844
  FNMA, 9s, 2002 - 2008                                            26,757      27,927,434
                                                                           --------------
                                                                           $   28,462,278
- -----------------------------------------------------------------------------------------
Federal National Mortgage Association - 30 Year - 3.5%
  FNMA, 6.695s, 2005                                             $ 10,000  $   10,068,750
  FNMA, Stripped Mortgage-Backed Security, "240", 7s, 2023         18,096       5,954,531
  FNMA, 7.5s, 2022                                                     48          48,165
  FNMA, 7.95s, 2005                                                 6,290       6,522,926
  FNMA, 8s, 2017 - 2023                                             1,591       1,617,091
  FNMA, 8.5s, 2022                                                  2,332       2,403,129
  FNMA, 9s, 2017                                                        7           6,932
  FNMA, 9.5s, 2022 - 2025                                          18,969      19,899,598
                                                                           --------------
                                                                           $   46,521,122
- -----------------------------------------------------------------------------------------
Financing Corporation - 5.0%
  FICO, 10.7s, 2017                                              $ 11,305  $   15,526,739
  FICO, 9.8s, 2018                                                  5,285       6,731,769
  FICO, 10.35s, 2018                                               33,965      45,391,166
                                                                           --------------
                                                                           $   67,649,674
- -----------------------------------------------------------------------------------------
Government National Mortgage Association - 15 Year - 3.8%
  GNMA, 7.5s, 2008 - 2009                                        $ 17,690  $   17,971,884
  GNMA, 8s, 2002 - 2009                                            15,149      15,608,407
  GNMA, 9.5s, 2009 - 2010                                          16,420      17,240,771
                                                                           --------------
                                                                           $   50,821,062
- -----------------------------------------------------------------------------------------
Government National Mortgage Association - 30 Year - 64.7%
  GNMA, 6.5s, 2023 - 2024                                        $ 10,188  $    9,678,548
  GNMA, 7s, 2022 - 2024                                           245,719     239,804,910
  GNMA, 7.5s, 2008 - 2024                                         179,491     179,377,680
  GNMA, 8s, 2002 - 2025                                            71,192      72,659,576
  GNMA, 8.5s, 2022 - 2024                                          27,622      28,631,431
  GNMA, 9s, 2008 - 2024                                           147,937     155,875,822
  GNMA, 9.5s, 2009 - 2022                                         106,731     113,234,228
  GNMA, 10s, 2009 - 2019                                           29,598      32,206,560
  GNMA, 10.5s, 2019 - 2021                                          7,341       8,102,682
  GNMA, 11s, 2021                                                  27,356      30,502,148
  GNMA, 12.5s, 2011                                                   632         716,799
                                                                           --------------
                                                                           $  870,790,384
- -----------------------------------------------------------------------------------------
<PAGE>
<CAPTION>
PORTFOLIO OF INVESTMENTS - continued
Bonds - continued
- -----------------------------------------------------------------------------------------
                                                         Principal Amount
Issuer                                                      (000 Omitted)           Value
- -----------------------------------------------------------------------------------------
<S>                                                              <C>       <C>
Small Business Administration - 4.8%
  SBA, 8.75s, 2006                                               $    176  $      189,483
  SBA, 10s, 2009                                                    4,103       4,659,618
  SBA, 10.1s, 2009                                                  7,937       9,026,832
  SBA, 9.3s, 2010                                                   3,920       4,346,649
  SBA, 9.45s, 2010                                                  9,352      10,449,751
  SBA, 9.55s, 2010                                                 10,249      11,438,833
  SBA, 9.7s, 2010                                                   3,209       3,608,156
  SBA, 8.8s, 2011                                                   3,327       3,631,817
  SBA, 8.85s, 2011                                                 13,178      14,418,201
  SBA, 8.05s, 2012                                                  2,808       2,871,038
                                                                           --------------
                                                                           $   64,640,378
- -----------------------------------------------------------------------------------------
U.S. Federal Agencies - 0.2%
  Federal Agricultural Mortgage Corp., 8.07s, 2006               $  3,000  $    3,305,610
- -----------------------------------------------------------------------------------------
U.S. Treasury Obligations - 9.0%
  Principal Stripped-Interest Payments, 0s, 2017 - 2021          $ 69,900  $   12,569,339
  U.S. Treasury Notes, 9.375s, 1996                                 3,000       3,074,070
  U.S. Treasury Notes, 5.25s, 1998                                 29,000      28,401,730
  U.S. Treasury Bonds, 13.125s, 2001*                              25,000      33,293,000
  U.S. Treasury Bonds, 10.75s, 2003 - 2005                         27,085      35,091,789
  U.S. Treasury Bonds, 8.75s, 2020                                  7,900       9,572,589
                                                                           --------------
                                                                           $  122,002,517
- -----------------------------------------------------------------------------------------
Total Bonds (Identified Cost, $1,307,801,045)                              $1,310,173,211
- -----------------------------------------------------------------------------------------
Repurchase Agreement - 3.4%
- -----------------------------------------------------------------------------------------
  Lehman Brothers, dated 7/31/95, due 8/01/
    95, total to be received $45,456,335
    (secured by U.S. Treasury Note, 5.81s,
    due 3/07/96, market value $47,960,000),
    at Cost and Value                                            $ 45,449  $   45,449,000
- -----------------------------------------------------------------------------------------
Total Investments (Identified Cost, $1,353,250,045)                        $1,355,622,211
Other Assets, Less Liabilities - (0.7)%                                        (9,569,414)
- -----------------------------------------------------------------------------------------

Net Assets - 100.0%                                                        $1,346,052,797
- -----------------------------------------------------------------------------------------
+ Restricted security.
* Denotes all or a portion of a security segregated as collateral for open futures contracts.
</TABLE>


See notes to financial statements


<PAGE>

FINANCIAL  STATEMENTS
Statement  of  Assets  and  Liabilities
- ------------------------------------------------------------------------------
July 31, 1995
- ------------------------------------------------------------------------------
Assets:
  Investments, at value (identified cost, $1,353,250,045)     $1,355,622,211
  Cash                                                               157,067
  Receivable for daily variation margin on open futures
    contracts                                                         37,500
  Receivable for Fund shares sold                                    109,919
  Interest receivable                                             13,494,789
  Other assets                                                        19,877
                                                              --------------
      Total assets                                            $1,369,441,363
                                                              --------------
Liabilities:
  Payable for investments purchased                           $   20,134,375
  Payable for Fund shares reacquired                               2,342,969
  Payable to affiliates -
    Management fee                                                    71,293
    Shareholder servicing agent fee                                   19,987
    Distribution fee                                                 352,910
  Accrued expenses and other liabilities                             467,032
                                                              --------------
      Total liabilities                                       $   23,388,566
                                                              --------------
Net assets                                                    $1,346,052,797
                                                              ==============
Net assets consist of:
  Paid-in capital                                             $1,471,569,421
  Unrealized appreciation on investments                           2,115,035
  Accumulated net realized loss on investments                  (127,510,438)
  Distributions in excess of net investment income                  (121,221)
                                                              --------------
      Total                                                   $1,346,052,797
                                                              ==============
Shares of beneficial interest outstanding                      202,424,538
                                                              ==============
Class A shares:
  Net asset value and redemption price per share
    (net assets of $533,986,698 / 80,276,379 shares of
     beneficial interest outstanding)                            $6.65
                                                                 =====
  Offering price per share (100/95.25)                           $6.98
                                                                 =====
Class B shares:
  Net asset value and offering price per share
    (net assets of $812,066,099 / 122,148,159 shares of
     beneficial interest outstanding)                            $6.65
                                                                 =====
On sales of $100,000 or more, the offering price of Class A shares is reduced.
A contingent deferred sales charge may be imposed on redemptions of Class A
and Class B shares.

See notes to financial statements
<PAGE>


FINANCIAL  STATEMENTS - continued
Statement  of  Operations
- ------------------------------------------------------------------------------
Year Ended July 31, 1995
- ------------------------------------------------------------------------------
Net investment income:
  Interest income                                                $120,116,845
                                                                 ------------
  Expenses -
    Management fee                                               $  9,450,684
    Trustees' compensation                                             82,098
    Shareholder servicing agent fee (Class A)                         615,160
    Shareholder servicing agent fee (Class B)                       2,056,115
    Distribution and service fee (Class A)                          1,435,563
    Distribution and service fee (Class B)                         10,437,907
    Postage                                                           340,657
    Printing                                                          143,030
    Auditing fees                                                      78,719
    Custodian fee                                                      39,152
    Legal fees                                                          9,745
    Miscellaneous                                                     890,219
                                                                 ------------
      Total expenses                                             $ 25,579,049
                                                                 ------------
          Net investment income                                  $ 94,537,796
                                                                 ------------
Realized and unrealized gain (loss) on investments:
  Realized loss (identified cost basis) -
    Investment transactions                                      $(41,522,420)
    Futures contracts                                              (2,714,208)
                                                                 ------------
      Net realized loss on investments                           $(44,236,628)
                                                                 ------------
  Change in unrealized appreciation -
    Investments                                                  $ 66,859,957
    Futures contracts                                               1,848,786
                                                                 ------------
      Net unrealized gain on investments                         $ 68,708,743
                                                                 ------------
        Net realized and unrealized gain on investments          $ 24,472,115
                                                                 ------------
          Increase in net assets from operations                 $119,009,911
                                                                 ============
See notes to financial statements
<PAGE>

FINANCIAL  STATEMENTS - continued

<TABLE>
<CAPTION>
Statement of Changes in Net Assets
- -----------------------------------------------------------------------------------------------------
                                                                        Eight Months       Year Ended
                                                          Year Ended           Ended     November 30,
                                                       July 31, 1995   July 31, 1994            1993
- -----------------------------------------------------------------------------------------------------
<S>                                                   <C>             <C>              <C>
Increase (decrease) in net assets:
From operations -
  Net investment income                               $   94,537,796  $    74,548,971  $   61,921,749
  Net realized gain (loss) on investments                (44,236,628)     (25,065,163)      3,896,696
  Net unrealized gain (loss) on investments               68,708,743      (75,294,158)    (29,750,350)
                                                      --------------   --------------  --------------
    Increase (decrease) in net assets from operations $  119,009,911  $   (25,810,350) $   36,068,095
                                                      --------------   --------------  --------------
Distributions declared to shareholders -
  From net investment income (Class A)                $  (26,574,630) $   (14,372,080) $  (41,366,228)
  From net investment income (Class B)                   (62,269,346)     (38,804,832)    (16,456,135)
  In excess of net realized gain on investments
   (Class A)                                                  --               --          (4,790,820)
  From paid-in capital (Class A)                              --           (6,354,345)         --
  From paid-in capital (Class B)                              --          (17,156,825)         --
  Tax return of capital                                   (2,036,802)          --              --
                                                      --------------   --------------  --------------
    Total distributions declared to shareholders      $  (90,880,778) $   (76,688,082) $  (62,613,183)
                                                      --------------   --------------  --------------

Fund share (principal) transactions -
  Net proceeds from sales of shares                   $  207,482,564  $    55,960,166  $   29,918,411
  Net asset value of shares issued to shareholders
    in connection with merger of MFS Lifetime 
    Government Mortgage Fund                                  --               --       1,774,003,938
  Net asset value of shares issued to shareholders in
    reinvestment of distributions                         40,173,434       31,831,973      24,936,586
  Cost of shares reacquired                             (582,715,690)    (482,278,453)   (367,519,075)
                                                      --------------   --------------  --------------
    Increase (decrease)in net assets from Fund
      share transactions                              $ (335,059,692) $  (394,486,314) $1,461,339,860
                                                      --------------   --------------  --------------
      Total increase (decrease) in net assets         $ (306,930,559) $  (496,984,746) $1,434,794,772
Net assets:
  At beginning of period                               1,652,983,356    2,149,968,102     715,173,330
                                                      --------------   --------------  --------------
  At end of period (including distributions in
    excess of net investment income of $(121,221),
    $(50,624) and $(11,856,473), respectively)        $1,346,052,797  $ 1,652,983,356  $2,149,968,102
                                                      ==============  ===============  ==============
See notes to financial statements
</TABLE>
<PAGE>

<TABLE>
<CAPTION>
FINANCIAL  STATEMENTS - continued
Financial  Highlights
- --------------------------------------------------------------------------------------------------------------------------
                                                                       Eight
                                               Year Ended       Months Ended     Year Ended November 30,
                                                 July 31,           July 31,     -----------------------------------------
                                                     1995               1994           1993           1992           1991
- --------------------------------------------------------------------------------------------------------------------------
                                                  Class A
- --------------------------------------------------------------------------------------------------------------------------
Per share data (for a share outstanding throughout each period):
<S>                                                <C>                <C>             <C>           <C>             <C>
Net asset value - beginning of period              $ 6.49             $ 6.85          $ 6.82         $ 6.95         $ 7.01
                                                   ------             ------          ------         ------         ------
Income from investment operations<F2> -
  Net investment income<F4>                        $ 0.45             $ 0.29          $ 0.34         $ 0.46         $ 0.48
  Net realized and unrealized gain (loss)
   on investments                                    0.14              (0.36)           0.20           0.09           0.25
                                                   ------             ------          ------         ------         ------
     Total from investment operations              $ 0.59              (0.07)         $ 0.54         $ 0.55         $ 0.73
                                                   ------             ------          ------         ------         ------
Less distributions declared to shareholders -
  From net investment income                       $(0.42)             (0.20)         $(0.47)        $(0.42)        $(0.44)
  In excess of net realized gain on
   investments                                        --                --             (0.04)           --             --
  From paid-in capital                                --               (0.09)           --            (0.26)         (0.35)
  Tax return of capital                             (0.01)              --              --              --             --
                                                   ------             ------          ------         ------         ------
    Total distributions declared to shareholders   $(0.43)             (0.29)         $(0.51)        $(0.68)        $(0.79)
                                                   ------             ------          ------         ------         ------
Net asset value - end of period                    $ 6.65             $ 6.49          $ 6.85         $ 6.82         $ 6.95
                                                   ======             ======          ======         ======         ======
Total return<F3>                                    9.60%              (1.51)%<F1>     8.11%          8.25%         11.00%
Ratios (to average net assets)/
 Supplemental data<F4>:
  Expenses                                          1.25%               1.27%<F1>      1.38%          1.42%          1.44%
  Net investment income                             6.99%               6.46%<F1>      6.30%          6.57%          6.91%
Portfolio turnover                                    87%                 37%           167%           484%           731%
Net assets at end of period (000,000 omitted)     $   534             $   424         $  522         $  715         $  886

<FN>
<F1>Annualized.
<F2>Per share data for the periods subsequent to November 30, 1993 is based on average shares outstanding.
<F3>Total returns for Class A shares do not include the applicable sales charge (except for reinvested dividends prior to
    October 1, 1989). If the charge had been included, the results would have been lower.
<F4>The investment adviser did not impose a portion of its management fee for the periods indicated. If this fee had been
    incurred by the Fund, the net investment income per share and the ratios would have been:


  Net investment income                               --              $  0.29         $ 0.34            --             --
  Ratios (to average net assets):
    Expenses                                          --                1.28%<F1>      1.46%            --             --
    Net investment income                             --                6.45%<F1>      6.22%            --             --

See notes to financial statements
</TABLE>


<PAGE>
FINANCIAL  STATEMENTS - continued

<TABLE>
<CAPTION>
Financial  Highlights - continued
- -----------------------------------------------------------------------------------------------------------------------
Year Ended November 30,                           1990               1989           1988           1987         1986<F1>
- -----------------------------------------------------------------------------------------------------------------------
                                               Class A
- -----------------------------------------------------------------------------------------------------------------------
Per share data (for a share outstanding throughout each period):
<S>                                             <C>                <C>            <C>           <C>             <C>   
Net asset value - beginning of period           $ 7.86             $ 7.82         $ 8.34        $  9.82         $ 9.53
                                                ------             ------         ------        -------         ------
Income from investment operations -
  Net investment income                         $ 0.53             $ 0.59         $ 0.64        $  0.75         $ 0.72
  Net realized and unrealized gain
   (loss) on investments                         (0.40)              0.48          (0.06)         (1.08)          0.43
                                                ------             ------         ------        -------         ------
      Total from investment operations          $ 0.13             $ 1.07         $ 0.58        $ (0.33)        $ 1.15
                                                ------             ------         ------        -------         ------
Less distributions declared to shareholders -
  From net investment income                    $(0.49)            $(0.58)        $(0.64)       $ (0.82)        $(0.65)
  From net realized gain on investments            --                 --             --           (0.01)         (0.21)
  From paid-in capital                           (0.49)             (0.45)         (0.46)         (0.32)           --
                                                ------             ------         ------        -------         ------
    Total distributions declared to
      shareholders                              $(0.98)            $(1.03)        $(1.10)       $ (1.15)        $(0.86)
                                                ------             ------         ------        -------         ------
Net asset value - end of period                 $ 7.01             $ 7.86         $ 7.82        $  8.34         $ 9.82
                                                ======             ======         ======        =======         ======

Total return<F3>                                 2.05%             14.72%          7.39%        (3.37)%         13.75%<F2>
Ratios (to average net assets)/
 Supplemental data:
  Expenses                                       1.40%              1.37%          1.38%          1.34%          1.00%<F2>
  Net investment income                          7.29%              7.57%          7.88%          8.34%          9.54%<F2>
Portfolio turnover                                507%               489%           285%           212%           169%
Net assets at end of period (000,000 omitted)   $1,068             $1,380         $1,295         $1,129         $  593

<FN>
<F1>For the period from the commencement of investment operations, January 9, 1986 to November 30, 1986.
<F2>Annualized.
<F3>Total returns for Class A shares do not include the applicable sales charge (except for reinvested dividends prior to
    October 1, 1989). If the charge had been included, the results would have been lower.

See notes to financial statements
</TABLE>

<PAGE>

FINANCIAL  STATEMENTS - continued

<TABLE>
<CAPTION>
Financial  Highlights - continued
- -------------------------------------------------------------------------------------------
                                                           Eight Months
                                          Year Ended              Ended       Period Ended
                                            July 31,           July 31,       November 30,
                                                1995               1994             1993<F1>
- -------------------------------------------------------------------------------------------
                                             Class B
- -------------------------------------------------------------------------------------------
Per share data (for a share outstanding 
 throughout each period):
<S>                                           <C>              <C>                <C>   
Net asset value - beginning of period        $  6.49           $  6.84            $ 6.97
                                             -------           -------            ------
Income from investment operations<F3> -
  Net investment income<F4>                  $  0.41           $  0.26            $ 0.38
  Net realized and unrealized gain (loss)
   on investments                               0.14             (0.35)            (0.44)
                                             -------           -------            ------ 
     Total from investment operations        $  0.55           $ (0.09)           $(0.06)
                                             -------           -------            ------ 
Less distributions declared to shareholders -
  From net investment income                 $ (0.38)          $ (0.18)           $(0.07)
  From paid-in capital                           --              (0.08)             -- 
  Tax return of capital                        (0.01)              --               --
                                              ------           -------            ------
     Total distributions declared to
      shareholders                           $ (0.39)          $ (0.26)           $(0.07)
                                             -------           -------            ------

Net asset value - end of period              $  6.65           $  6.49            $ 6.84
                                             =======           =======            ======
Total return                                   8.81%           (1.97)%<F2>        (3.91)%<F2>
Ratios (to average net assets)/
 Supplemental data<F4>:
  Expenses                                     1.96%             1.94%<F2>           1.87%<F2>
  Net investment income                        6.28%             5.80%<F2>           5.92%<F2>
Portfolio turnover                               87%               37%                167%
Net assets at end of period
 (000,000 omitted)                           $   812            $1,229             $1,628

<FN>
<F1>For the period from the commencement of offering of Class B shares, September 7, 1993 to November 30, 1993.
<F2>Annualized.
<F3>Per share data for the periods subsequent to November 30, 1993 is based on average shares outstanding.
<F4>The investment adviser did not impose a portion of its management fee for the periods indicated. If this fee had been
    incurred by the Fund, the net investment income per share and the ratios would have been:

Net investment income                           --               $ 0.26             $ 0.38
  Ratios (to average net assets):
    Expenses                                    --                1.94%<F2>          1.94%<F2>
    Net investment income                       --                5.80%<F2>          5.85%<F2>

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

(1) Business and Organization
MFS Government Mortgage Fund (the Fund) is a diversified series of MFS Series
Trust X (the Trust). 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, diversified management investment company.

(2) Significant Accounting Policies
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. Futures
contracts listed on commodities exchanges are valued at closing settlement
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.

Repurchase Agreements - The Fund may enter into repurchase agreements with
institutions that the Fund's investment adviser has determined are creditworthy.
Each repurchase agreement is recorded at cost. The Fund requires that the
securities purchased in a repurchase transaction be transferred to the custodian
in a manner sufficient to enable the Fund to obtain those securities in the
event of a default under the repurchase agreement. The Fund monitors, on a daily
basis, the value of the securities transferred to ensure that the value,
including accrued interest, of the securities under each repurchase agreement is
greater than amounts owed to the Fund under each such repurchase agreement.

Futures Contracts - The Fund may enter into futures contracts for the delayed
delivery of securities at a fixed price on a future date. In entering such
contracts, the Fund is required to deposit either in cash or securities an
amount equal to a certain percentage of the contract amount. Subsequent payments
are made or received by the Fund each day, depending on the daily fluctuations
in the value of the underlying security, and are recorded for financial
statement purposes as unrealized gains or losses by the Fund. The Fund's
investment in futures contracts is designed to hedge against anticipated changes
in interest rates or securities prices. Investments in interest rate futures for
purposes other than hedging may be made to modify the duration of the portfolio
without incurring the additional transaction costs involved in buying and
selling the underlying securities. Should interest rates or securities prices
move unexpectedly, the Fund may not achieve the anticipated benefits of the
futures contracts and may realize a loss.

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.

Tax Matters and Distributions - The Fund's 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 Fund 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 Fund's 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 Fund 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 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 July 31, 1995, $5,764,417 was reclassified from
accumulated undistributed net investment income and $48,392 and $5,716,025 were
reclassified to paid-in capital and accumulated net realized gain on
investments, respectively, due to differences between book and tax accounting
for mortgage-backed securities and tax-basis return of capital. This change had
no effect on the net assets or net asset value per share.

At July 31, 1995, the Fund, for federal income tax purposes, had a capital loss
carry- forward of $(95,700,480) which may be applied against any net taxable
realized gains of each succeeding year until the earlier of its utilization or
expiration on July 31, 1996 ($3,630,686), July 31, 1998 ($81,836,532), July 31,
2002 ($5,628,534) and July 31, 2003 ($4,604,728).

Multiple Classes of Shares of Beneficial Interest - The Fund offers Class A and
Class B shares. The two classes of shares differ in their respective shareholder
servicing agent, distribution and service fees. All shareholders bear the common
expenses of the Fund pro rata, based on average daily net assets of each class,
without distinction between share classes. Dividends are declared separately for
each class. No class has preferential dividend rights; differences in per share
dividend rates are generally due to differences in separate class expenses.

(3) Transactions with Affiliates
Investment Adviser - The Fund 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 equal to the
lesser of (i) 0.65% of the Fund's average daily net assets or (ii) 0.30% of the
Fund's average daily net assets and 6.1% of the Fund's gross income.

The Fund pays no compensation directly to its Trustees who are officers of the
investment adviser, or to officers of the Fund, all of whom receive remuneration
for their services to the Fund from MFS. Certain of the officers and Trustees of
the Fund are officers or directors of MFS, MFS Fund Distributors, Inc. (MFD) and
MFS Service Center, Inc. (MFSC). The Fund has an unfunded defined benefit plan
for all its independent Trustees. Included in Trustees' compensation is a net
periodic pension expense of $31,318 for the year ended July 31, 1995.

Distributor - MFD, a wholly owned subsidiary of MFS, as distributor, received
$19,176 for the year ended July 31, 1995, as its portion of the sales charge on
sales of Class A shares of the Fund.

The Trustees have adopted separate distribution plans for Class A and Class B
shares pursuant to Rule 12b-1 of the Investment Company Act of 1940 as follows:

The Class A distribution plan provides that the Fund will pay MFD up to 0.35%
per annum of its average daily net assets attributable to Class A shares in
order that MFD may pay expenses on behalf of the Fund related to the
distribution and servicing of its shares. These expenses include a service fee
to each securities dealer that enters into a sales agreement with MFD of up to
0.25% per annum of the Fund's average daily net assets attributable to Class A
shares which are attributable to that securities dealer, a distribution fee to
MFD of up to 0.10% per annum of the Fund's average daily net assets attributable
to Class A shares, commissions to dealers and payments to MFD wholesalers for
sales at or above a certain dollar level, and other such distribution-related
expenses that are approved by the Fund. MFD retains the service fee for accounts
not attributable to a securities dealer, which amounted to $105,920 for the year
ended July 31, 1995. Fees incurred under the distribution plan during the year
ended July 31, 1995 were 0.35% of average daily net assets attributable to Class
A shares on an annualized basis.

The Class B distribution plan provides that the Fund will pay MFD a monthly
distribution fee of 0.75% per annum, and a service fee of up to 0.25% per annum,
of the Fund's average daily net assets attributable to Class B shares. MFD will
pay to securities dealers that enter into a sales agreement with MFD all or a
portion of the service fee attributable to Class B shares. The service fee is
intended to be additional consideration for services rendered by the dealer with
respect to Class B shares. MFD retains the service fee for accounts not
attributable to a securities dealer, which amounted to $175,913 for Class B
shares for the year ended July 31, 1995. Fees incurred under the distribution
plan during the year ended July 31, 1995 were 1.00% of average daily net assets
attributable to Class B shares on an annualized basis.

A contingent deferred sales charge is imposed on shareholder redemptions of
Class A shares, on purchases of $1 million or more, in the event of a
shareholder redemption within 12 months following the share purchase. A
contingent deferred sales charge is imposed on shareholder redemptions of Class
B shares in the event of a shareholder redemption within six years of purchase.
MFD receives all contingent deferred sales charges. Contingent deferred sales
charges imposed during the year ended July 31, 1995 were $0 and $1,386,715 for
Class A and Class B shares, respectively.

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 of each class of shares at an
effective annual rate of up to 0.15% and up to 0.22% attributable to Class A and
Class B shares, respectively.

(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                   $1,230,194,850      $1,547,019,438
                                             ==============      ==============

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

Aggregate cost                                                   $1,353,408,420
                                                                 ==============
Gross unrealized appreciation                                    $   24,851,994
Gross unrealized depreciation                                       (22,638,203)
                                                                 --------------
  Net unrealized appreciation                                    $    2,213,791
                                                                 ==============

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

<TABLE>
<CAPTION>
Class A Shares

                                                                           Eight Months Ended
                                     Year Ended July 31, 1995                   July 31, 1994
                                  ---------------------------    ----------------------------
                                       Shares          Amount         Shares           Amount
- ---------------------------------------------------------------------------------------------
<S>                               <C>            <C>             <C>            <C>          
Shares sold                        27,491,721    $181,805,681      4,203,202    $  27,515,113
Shares issued to shareholders in
 reinvestment of distributions      1,875,858      12,007,470      1,321,312        8,740,816
Shares reacquired                 (14,375,598)    (92,201,944)   (16,516,662)    (109,058,350)
                                  -----------    ------------    -----------    -------------
  Net increase (decrease)          14,991,981    $101,611,207    (10,992,148)   $ (72,802,421)
                                  ===========    ============    ===========    =============

<CAPTION>
                                                                 Year Ended November 30, 1993
                                                                 ----------------------------
                                                                      Shares           Amount
- ---------------------------------------------------------------------------------------------
<S>                                                              <C>            <C>           
Shares sold                                                        2,146,686    $  19,558,553
Shares issued to shareholders in reinvestment of distributions     2,663,943       18,391,733
Shares reacquired                                                (33,340,955)    (235,950,665)
                                                                 -----------    -------------
  Net decrease                                                   (28,530,326)   $(198,000,379)
                                                                 ===========    =============
<PAGE>
<CAPTION>
Class B Shares

                                                                           Eight Months Ended
                                     Year Ended July 31, 1995                   July 31, 1994
                                  ---------------------------     ---------------------------
                                       Shares          Amount          Shares          Amount
- ---------------------------------------------------------------------------------------------
<S>                               <C>            <C>              <C>           <C>          
Shares sold                         4,039,025    $  25,676,883      4,217,881   $  28,445,053
Shares issued to shareholders in
 reinvestment of distributions      4,409,939       28,165,964      3,488,783      23,091,157
Shares reacquired                 (75,797,892)    (490,513,746)   (56,121,433)   (373,220,103)
                                  -----------    -------------    ------------  -------------
  Net decrease                    (67,348,928)   $(436,670,899)   (48,414,769)  $(321,683,893)
                                  ===========    =============    ===========   =============

<CAPTION>
                                                              Period Ended November 30, 1993*
                                                              -------------------------------
                                                                     Shares            Amount
- ---------------------------------------------------------------------------------------------
<S>                                                             <C>           <C>           
Shares sold                                                       1,496,862   $    10,359,858
Shares issued in connection with merger with Lifetime
 Government Mortgage Fund                                       254,500,711     1,774,003,938
Shares issued to shareholders in reinvestment of distributions      949,148         6,544,853
Shares reacquired                                               (19,034,865)     (131,568,410)
                                                                -----------   ---------------
  Net increase                                                  237,911,856   $ 1,659,340,239
                                                                ===========   ===============

*For the period from the commencement of offering of Class B shares, September 7, 1993 to
 November 30, 1993.
</TABLE>

(6) Line of Credit
The Fund 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 Fund 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 Fund for the year ended July 31,
1995 was $20,751.

(7) Financial Instruments
The Fund 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. These financial instruments include futures contracts.
The notional or contractual amounts of these instruments represent the
investment the Fund 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. A summary of
obligations under these financial instruments at July 31, 1995, is as follows:

                                                                    Unrealized
Futures Contracts          Expiration    Contracts    Position    Depreciation
- ------------------------------------------------------------------------------
U.S. Treasury Notes    September 1995          100        Long        $257,131
                                                                      ========

At July 31, 1995, the Fund had sufficient cash and/or securities to cover margin
requirements on open futures contracts.
<PAGE>

(8) Restricted Securities
The Fund may invest not more than 10% of its total assets in securities which
are subject to legal or contractual restrictions on resale. At July 31, 1995,
the Fund owned the following restricted security (constituting 1.83% of total
assets) which may not be publicly sold without registration under the Securities
Act of 1933. The Fund 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.

<TABLE>
<CAPTION>
Description                      Date of Acquisition   Par Amount         Cost        Value
- -------------------------------------------------------------------------------------------
<S>                                          <C>      <C>          <C>          <C>        
FHA, Centennial, "A", 8.25s, 2028            3/23/93  $23,895,281  $24,612,139  $25,109,400
                                                                                ===========
</TABLE>

(9) Acquisitions
At close of business on September 6, 1993, the Fund acquired all of the assets
and liabilities of MFS Lifetime Government Mortgage Fund. The acquisition was
accomplished by a tax-free exchange of 254,500,711 Class B shares of the Fund
(valued at $1,774,003,938) for all of the assets, subject to all of the
liabilities of MFS Lifetime Government Mortgage Fund. MFS Lifetime Government
Mortgage Fund then converted all of its outstanding shares for the Class B
shares of the Fund and distributed the Class B shares to its shareholders. MFS
Lifetime Government Mortgage Fund's net assets on that date ($1,774,003,938),
including $45,387,402 of unrealized appreciation, were combined with those of
the Fund. The aggregate net assets of the Fund after the acquisition were
$2,336,607,120.
<PAGE>
INDEPENDENT AUDITORS' REPORT

To the Trustees of MFS Series Trust X and Shareholders of MFS Government
Mortgage Fund:

We have audited the accompanying statement of assets and liabilities, including
the portfolio of investments, of MFS Government Mortgage Fund as of July 31,
1995, the related statement of operations for the year then ended, the statement
of changes in net assets for the year ended July 31, 1995, the eight months
ended July 31, 1994 and the year ended November 30, 1993, and the financial
highlights for the year ended July 31, 1995, the eight months ended July 31,
1994, and for each of the years in the eight-year period ended November 30,
1993. These financial statements and financial highlights are the responsibility
of the Fund's management. Our responsibility is to express an opinion on these
financial statements and financial highlights based on our 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 July
31, 1995, 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 Government
Mortgage Fund at July 31, 1995, 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
September 8, 1995


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

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>
THE MFS FAMILY OF FUNDS(R)
America's Oldest Mutual Fund Group

The members of the MFS Family of Funds are grouped below according to the types
of securities in their portfolios. For free prospectuses containing more
complete information, including the exchange privilege and all charges and
expenses, please contact your financial adviser or call MFS at 1-800-637-2929
any business day from 9 a.m. to 5 p.m. Eastern time (or, leave a message any
time). This material should be read carefully before investing or sending money.

<TABLE>
<S>                                          <C>
STOCK                                        LIMITED MATURITY BOND
- -----------------------------------------    ----------------------------------------
Massachusetts Investors Trust                MFS(R) Government Limited Maturity Fund
- -----------------------------------------    ----------------------------------------
Massachusetts Investors Growth Stock Fund    MFS(R) Limited Maturity Fund
- -----------------------------------------    ----------------------------------------
MFS(R) Capital Growth Fund                   MFS(R) Municipal Limited Maturity Fund
- -----------------------------------------    ----------------------------------------
MFS(R) Emerging Growth Fund
- -----------------------------------------
MFS(R) Gold & Natural Resources Fund         WORLD
- -----------------------------------------    ----------------------------------------
MFS(R) Growth Opportunities Fund             MFS(R) World Asset Allocation Fund
- -----------------------------------------    ----------------------------------------
MFS(R) Managed Sectors Fund                  MFS(R) World Equity Fund
- -----------------------------------------    ----------------------------------------
MFS(R) OTC Fund                              MFS(R) World Governments Fund
- -----------------------------------------    ----------------------------------------
MFS(R) Research Fund                         MFS(R) World Growth Fund
- -----------------------------------------    ----------------------------------------
MFS(R) Value Fund                            MFS(R) World Total Return Fund
- -----------------------------------------    ----------------------------------------

STOCK AND BOND                               NATIONAL TAX-FREE BOND
- -----------------------------------------    ----------------------------------------
MFS(R) Total Return Fund                     MFS(R) Municipal Bond Fund
- -----------------------------------------    ----------------------------------------
MFS(R) Utilities Fund                        MFS(R) Municipal High Income Fund
- -----------------------------------------    (closed to new investors)
                                             ----------------------------------------
BOND                                         MFS(R) Municipal Income Fund
- -----------------------------------------    ----------------------------------------
MFS(R) Bond Fund
- -----------------------------------------
MFS(R) Government Mortgage Fund              STATE TAX-FREE BOND
- -----------------------------------------    ----------------------------------------
MFS(R) Government Securities Fund            Alabama, Arkansas, California, Florida,
- -----------------------------------------    Georgia, Louisiana, Maryland, Massachusetts,
MFS(R) High Income Fund                      Mississippi, New York, North Carolina,
- -----------------------------------------    Pennsylvania, South Carolina, Tennessee,
MFS(R) Intermediate Income Fund              Texas, Virginia, Washington, West Virginia
- -----------------------------------------    ----------------------------------------
MFS(R) Strategic Income Fund
(formerly MFS(R) Income & Opportunity Fund)  MONEY MARKET
- -----------------------------------------    ----------------------------------------
                                             MFS(R) Cash Reserve Fund
                                             ----------------------------------------
                                             MFS(R) Government Money Market Fund
                                             ----------------------------------------
                                             MFS(R) Money Market Fund
                                             ----------------------------------------
</TABLE>


<PAGE>
                                                       -------------
MFS(R)           [SEAL]                                BULK RATE
GOVERNMENT       NUMBER                                U.S. POSTAGE
MORTGAGE           1                                   P A I D
FUND             DALBAR                                PERMIT #55638
           TOP-RATED SERVICE                           BOSTON, MA
                                                       -------------

500 Boylston Street
Boston, MA 02116


[LOGO] M F S (SM)
THE FIRST NAME IN MUTUAL FUNDS



                                                          MGM-2 9/95 109M 31/231



<PAGE>

                                     PART C


Item 24  Financial Statements and Exhibits
   
         (a) Financial Statements Included in Part A:

             MFS Government Mortgage Fund

               For the period from the start of business, January 9, 1986, to
               November 30, 1993, for the period from November 30, 1993 to
               July 31, 1994 and for the year ended July 31, 1995:
                 Financial Highlights

             Financial Statements Included in Part B:

             MFS Government Mortgage Fund

               At July 31, 1995:
                 Portfolio of Investments*
                 Statement of Assets and Liabilities*

               For the year ended July 31, 1995:
                 Statement of Operations*

               For the year ended November 30, 1993, the eight months ended
               July 31, 1994 and the year ended July 31, 1995:
                 Statement of Changes in Net Assets*

- -----------------------------------
* Incorporated  herein by reference to the Fund's Annual Report to  Shareholders
  dated July 31, 1995 filed with the SEC via EDGAR on September 27, 1995.

         (b) Exhibits

             1 (a) Amended and Restated Declaration of Trust, dated January 19,
                   1995.  (3)

               (b) Amendment to the Declaration of Trust dated June 2, 1995 to
                   change the name of the Trust and for the establishment
                   and designation of series and classes.  (4)

             2     Amended and Restated By-Laws, dated December 21, 1994.  (3)
               
             3     Not Applicable.
               
             4     Form of Share Certificate for Class A and Class B shares of
                   the Fund.  (5)
    
<PAGE>
   
             5 (a) Investment Advisory Agreement for MFS Government Mortgage
                   Fund, dated December 19, 1985; filed herewith.

               (b) Amendment to Investment Advisory Agreement for MFS Government
                   Mortgage Fund, dated January 1, 1996; filed herewith.

               (c) Investment Advisory Agreement for MFS Series Trust X (the
                   "Trust") on behalf of  MFS/Foreign & Colonial  International
                   Growth Fund, dated September 1, 1995; filed herewith.

               (d) Investment Advisory Agreement for the Trust on behalf of
                   MFS/Foreign & Colonial  International Growth and Income Fund,
                   dated September 1, 1995; filed herewith.

               (e) Investment Advisory Agreement for the Trust on behalf of
                   MFS/Foreign & Colonial  Emerging  Markets Equity Fund, dated
                   September 1, 1995; filed herewith.

               (f) Sub-Advisory Agreement between Massachusetts  Financial
                   Services Company (the "Adviser" or "MFS") and Foreign &
                   Colonial Management Ltd. (the "Sub-Adviser") with respect to
                   MFS/Foreign & Colonial International Growth Fund, dated
                   September 1, 1995; filed herewith.

               (g) Sub-Advisory Agreement between the Adviser and the
                   Sub-Adviser with respect to MFS/Foreign & Colonial
                   International Growth and Income Fund, dated September 1,
                   1995; filed herewith.

               (h) Sub-Advisory Agreement  between the Adviser and the
                   Sub-Adviser with respect to MFS/Foreign & Colonial Emerging
                   Markets Equity Fund, dated September 1, 1995; filed herewith.

               (i) Sub-Advisory Agreement between the Sub-Adviser and Foreign &
                   Colonial Emerging Markets Limited ("FCEM") with respect to
                   the MFS/Foreign & Colonial International Growth Fund, dated
                   September 1, 1995; filed herewith.
                    
               (j) Sub-Advisory Agreement between the Sub-Adviser and FCEM with
                   respect to the  MFS/Foreign & Colonial  International Growth
                   and Income Fund, dated September 1, 1995; filed herewith.

               (k) Sub-Advisory Agreement between the Sub-Adviser and FCEM with
                   respect to the MFS/Foreign & Colonial Emerging Markets 
                   Equity Fund, dated September 1, 1995; filed herewith.

             6 (a) Distribution  Agreement  between MFS Series Trust X and
                   MFS Fund Distributors, Inc., dated September 1, 1995; filed
                   herewith.
    
<PAGE>
   
               (b) Dealer Agreement between MFS Funds Distributors, Inc. and a
                   dealer, dated December 28, 1994 and the Mutual Funds
                   Agreement between MFD and a bank or NASD affiliate, dated
                   December 28, 1994. (1)

             7     Retirement Plan for Non-Interested Person Trustees, dated
                   January 1, 1991; filed herewith.

             8 (a) Custodian Agreement, dated February 19, 1988; filed herewith.

               (b) Amendment No. 1 to Custodian Agreement, dated February 29,
                   1988; filed herewith.
                    
               (c) Amendment No. 2 to Custodian Agreement, dated October 1,
                   1989; filed herewith.
                    
               (d) Amendment No. 3 to Custodian Agreement, dated September 17,
                   1991; filed herewith.

             9 (a) Shareholder Servicing Agent Agreement, dated September 1,
                   1995; filed herewith.
                    
               (b) Exchange Privilege Agreement, dated September 1, 1995; filed
                   herewith.

               (c) Loan Agreement by and among the Banks named therein, the MFS
                   Funds named therein, and the First National Bank of
                   Boston dated as of  February 21, 1995.  (2)

               (d) Dividend Disbursing Agency Agreement, dated February 1, 1986.
                   (5)

            10     24e-2 Consent and Opinion of Counsel; filed herewith.
                    
            11     Consent of Deloitte & Touche LLP; filed herewith.
               
            12     Not Applicable.
               
            13     Investment Representation Letter for MFS Government Mortgage
                   Fund; filed herewith.
               
            14 (a) Forms for Individual Retirement Account Disclosure Statement
                   as currently in effect.  (6)

               (b) Forms for MFS 403(b) Custodial Account Agreement as
                   currently in effect.  (6)
               
               (c) Forms for MFS Prototype Paired Defined Contribution Plans
                   and Funds Agreement as currently in effect.  (6)
    
<PAGE>
   
            15 (a) Amended and Restated Distribution Plan for Class A shares of
                   MFS Government Mortgage Fund dated December 21, 1994.  (3)
                    
               (b) Distribution Plan for Class B shares of MFS Government
                   Mortgage Fund dated December 21, 1994.  (3)
                    
               (c) Distribution Plan for Class A shares of MFS/Foreign &
                   Colonial International Growth Fund dated September 1, 1995;
                   filed herewith.
                    
               (d) Distribution Plan for Class A shares of MFS/Foreign &
                   Colonial  International  Growth and Income Fund dated
                   September 1, 1995; filed herewith.
                    
               (e) Distribution Plan for Class A shares of MFS/Foreign &
                   Colonial  Emerging  Markets  Equity Fund dated  September 1,
                   1995; filed herewith.
                    
               (f) Distribution Plan for Class B shares of MFS/Foreign &
                   Colonial  International Growth Fund dated September 1, 1995;
                   filed herewith.

               (g) Distribution Plan for Class B shares of MFS/Foreign &
                   Colonial  International  Growth and Income Fund dated
                   September 1, 1995; filed herewith.
                    
               (h) Distribution Plan for Class B shares of MFS/Foreign &
                   Colonial  Emerging  Markets  Equity Fund dated  September 1,
                   1995; filed herewith.

            16     Schedule for Computation of Performance Quotations - Average
                   Annual Total Rate of Return and Standardized Yield.  (3)
               
            18     Not Applicable.

            27     Financial Data Schedules for each class of MFS Government
                   Mortgage Fund; filed herewith.

                   Power of Attorney, dated September 21, 1994.  (3)
- -----------------------------
(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 Post-Effective Amendment No. 11 filed with
     the SEC via EDGAR on March 30, 1995.
(4)  Incorporated by reference to Post-Effective Amendment No. 12 filed with
     the SEC via EDGAR on June 16, 1995.
(5)  Incorporated by reference to MFS Municipal Series Trust (File Nos.
     2-92915 and 811-4096) Post-Effective Amendment No. 28 filed with the SEC
     via EDGAR on July 28, 1995.
(6)  Incorporated by reference to MFS Series Trust IX (File Nos. 2-50409 and
     811-2464) Post-Effective Amendment No. 32 filed with the SEC via EDGAR on
     August 28, 1995.
    
<PAGE>

Item 25. Persons Controlled by or under Common Control with Registrant

         Not Applicable.

Item 26. Number of Holders of Securities

         MFS Government Mortgage Fund
                         
              (1)                                      (2)
         Title of Class                      Number of Record Holders

         Class A Shares
   
         Shares of Beneficial Interest               39,310
          (without par value)                (as of October 31, 1995)

         Class B Shares
         Shares of Beneficial Interest               40,805
          (without par value)                (as of October 31, 1995)

         MFS/Foreign & Colonial International Growth Fund

               (1)                                     (2)
         Title of Class                      Number of Record Holders

         Class A Shares

         Shares of Beneficial Interest                 846
          (without par value)                (as of October 31, 1995)

         Class B Shares

         Shares of Beneficial Interest                 466
           (without par value)               (as of October 31, 1995)

         MFS/Foreign & Colonial International Growth and Income Fund

              (1)                                      (2)
         Title of Class                      Number of Record Holders

         Class A Shares

         Shares of Beneficial Interest                 196
          (without par value)                (as of October 31, 1995)
    
<PAGE>
         Class B Shares
   
         Shares of Beneficial Interest                 209
          (without par value)                (as of October 31, 1995)

         MFS/Foreign & Colonial Emerging Markets Equity Fund

              (1)                                      (2)
         Title of Class                      Number of Record Holders

         Class A Shares

         Shares of Beneficial Interest                 423
          (without par value)                (as of October 31, 1995)

         Class B Shares

         Shares of Beneficial Interest                 231
          (without par value)                (as of October 31, 1995)

Item 27. Indemnification

         Reference  is  hereby  made  to  (a)  Article  V  of  the  Registrant's
Declaration   of  Trust,   incorporated   by  reference   to  the   Registrant's
Post-Effective  Amendment No. 11, filed with the SEC on March 30, 1995;  and (b)
Section 9 of the Shareholder Servicing Agent Agreement, filed herewith.
    
         The Trustees and officers of the  Registrant  and the  personnel of the
Registrant's  investment  adviser  are  insured  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 three series:  MFS Managed Sectors Fund, MFS Cash Reserve Fund and MFS World
Asset Allocation 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
    
<PAGE>
   
and   Colonial   International   Growth  Fund  and   MFS/Foreign   and  Colonial
International  Growth & Income Fund),  and MFS Municipal Series Trust (which has
19 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 Louisiana  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,
MFS  Pennsylvania  Municipal Bond Fund, MFS South Carolina  Municipal Bond Fund,
MFS Tennessee  Municipal Bond Fund, MFS Texas  Municipal Bond Fund, MFS Virginia
Municipal  Bond Fund,  MFS  Washington  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-International  Government 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 and MFS Meridian U.S.  Equity 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, James E. Russell is a Senior
Vice President and the Treasurer, Stephen E. Cavan is a Senior Vice President,
General Counsel and an Assistant Secretary, Joseph W. Dello Russo is a Senior
Vice President and Chief Financial Officer, Robert T. Burns is a Vice
President and an Assistant Secretary of MFS, and Mary Kay Doherty 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

         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.
    
<PAGE>
   
         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.

         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.
    
<PAGE>
   
         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, 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.

         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 James E. Russell is the Assistant Treasurer.
    
<PAGE>
   
         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, Joseph W.
Dello Russo is the Treasurer, and Robert T. Burns is the Assistant Secretary.

         MIL Fund

         A. Keith Brodkin is the Chairman, President and a Director, Richard
B. Bailey, John A. Brindle and Richard W. S. Baker 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 Fund

         A. Keith Brodkin is the Chairman, President and a Director, Richard
B. Bailey, John A. Brindle, Richard W. S. Baker, Arnold D. Scott and Jeffrey
L. Shames 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 James E. Russell 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 W. Dello Russo is the Treasurer, James E.
Russell 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, James E. Russell 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, James E. Russell is the
Assistant Treasurer and Robert T. Burns is the Secretary.
    
<PAGE>
   
         RSI

         William W. Scott, Jr., Joseph A. Recomendes and Bruce C. Avery are
Directors, Arnold D. Scott is the Chairman and a Director, Douglas C. Grip, a
Senior Vice President of MFS, is the President, Joseph W. Dello Russo is the
Treasurer, James E. Russell is the Assistant Treasurer, Stephen E. Cavan is
the Secretary, Robert T. Burns is the Assistant Secretary and Sharon A.
Brovelli is a Senior Vice President.

         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)

       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
    
<PAGE>
   
of the Registrant at the following locations:

       NAME                                            ADDRESS

Massachusetts Financial Services                  500 Boylston Street
Company (investment adviser)                      Boston, MA 02116

MFS Funds Distributors, Inc.                      500 Boylston Street
(principal underwriter)                           Boston, MA 02116

State Street Bank and Trust Company               State Street South
(custodian)                                       5 - West
                                                  North Quincy, MA 02171

MFS Service Center, Inc.                          500 Boylston Street
(transfer agent)                                  Boston, MA 02116
    
Item 31. Management Services

         Not Applicable.

Item 32. Undertakings

         (a) Not applicable.
   
         (b) The Registrant  undertakes to file a post-effective  amendment,  in
order to file financial statements for the MFS/Foreign & Colonial  International
Growth Fund,  MFS/Foreign  & Colonial  International  Growth and Income Fund and
MFS/Foreign  &  Colonial  Emerging  Markets  Equity  Fund,  which  need  not  be
certified,  within  four to six  months  from the  later of the  effective  date
(August 30, 1995) of  Post-Effective  Amendment  No. 12 which was filed with the
SEC on June 16, 1995 or the initial public offering of shares of each Fund.

         (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 28th day of November, 1995.

                                    MFS SERIES TRUST X


                                    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 November 28, 1995.

                  SIGNATURE                          TITLE


A. KEITH BRODKIN*                      Chairman, President (Principal Executive
A. Keith Brodkin                       Officer) and Trustee


W. THOMAS LONDON*                      Treasurer (Principal Financial Officer
W. Thomas London                       and Principal Accounting Officer)


RICHARD B. BAILEY*                     Trustee
Richard B. Bailey


PETER G. HARWOOD*                      Trustee
Peter G. Harwood


J. ATWOOD IVES*                        Trustee
J. Atwood Ives

<PAGE>

LAWRENCE T. PERERA*                    Trustee
Lawrence T. Perera


WILLIAM J. POORVU*                     Trustee
William J. Poorvu


CHARLES W. SCHMIDT*                    Trustee
Charles W. Schmidt


ARNOLD D. SCOTT*                       Trustee
Arnold D. Scott


JEFFREY L. SHAMES*                     Trustee
Jeffrey L. Shames


ELAINE R. SMITH*                       Trustee
Elaine R. Smith


DAVID B. STONE*                        Trustee
David B. Stone


                                    *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 September 21,
                                    1994, incorporated by reference to the
                                    Registrant's Post-Effective Amendment
                                    No. 11 filed with the Securities and
                                    Exchange Commission on
                                    March 30, 1995.
<PAGE>
                              INDEX TO EXHIBITS

EXHIBIT NO.                        DESCRIPTION OF EXHIBIT

 5  (a)        Investment Advisory Agreement, dated December 19, 1985.

    (b)        Amendment to Investment Advisory Agreement for MFS Government
                 Mortgage Fund, dated January 1, 1996.

    (c)        Investment Advisory Agreement for MFS Series Trust X (the
                 "Trust") on behalf of MFS/Foreign & Colonial International
                 Growth Fund, dated September 1, 1995.

    (d)        Investment Advisory Agreement for the Trust on behalf of
                  MFS/Foreign & Colonial International Growth and Income Fund,
                  dated September 1, 1995.

    (e)        Investment Advisory Agreement for the Trust on behalf of
                 MFS/Foreign & Colonial Emerging Markets Equity Fund, dated
                 September 1, 1995.

    (f)        Sub-Advisory Agreement between Massachusetts Financial Services
                 Company (the "Adviser" or "MFS")  and  Foreign  &  Colonial
                 Management Ltd. (the "Sub-Adviser") with respect
                 to MFS/Foreign & Colonial  International  Growth
                 Fund, dated September 1, 1995.

    (g)        Sub-Advisory Agreement between the Adviser  and the  Sub-Adviser
                 with  respect  to MFS/Foreign & Colonial  International Growth
                 and Income Fund, dated September 1, 1995.

    (h)        Sub-Advisory Agreement between the Adviser and the Sub-Adviser
                 with respect to MFS/Foreign & Colonial  Emerging  Markets
                 Equity Fund, dated September 1, 1995.

    (i)        Sub-Advisory Agreement between the Sub-Adviser and Foreign &
                 Colonial Emerging Markets  Limited  ("FCEM")  with  respect to
                 the MFS/Foreign  &  Colonial   International  Growth Fund,
                 dated September 1, 1995.

<PAGE>
EXHIBIT NO.                        DESCRIPTION OF EXHIBIT

   (j)         Sub-Advisory   Agreement   between  the Sub-Adviser   and  FCEM
                 with   respect  to  the MFS/Foreign & Colonial  International
                 Growth and Income Fund, dated September 1, 1995.

   (k)         Sub-Advisory   Agreement   between  the Sub-Adviser   and  FCEM
                 with   respect  to  the MFS/Foreign & Colonial  Emerging
                 Markets Equity Fund, dated September 1, 1995.

 6 (a)         Distribution Agreement between MFS Series Trust X and MFS Fund
                 Distributors,  Inc., dated September 1, 1995.

 7             Retirement Plan for Non-Interested Person Trustees, dated
                 January 1, 1991.

 8 (a)         Custodian Agreement, dated February 19, 1988.

   (b)         Amendment No. 1 to Custodian Agreement, dated February 29, 1988.

   (c)         Amendment No. 2 to Custodian Agreement, dated October 1, 1989.

   (d)         Amendment No. 3 to Custodian Agreement, dated September 17, 1991.

 9 (a)         Shareholder Servicing Agent Agreement, dated September 1, 1995.
     
   (b)         Exchange Privilege Agreement, dated September 1, 1995.

10             24e-2 Consent and Opinion of Counsel.

11             Consent of Deloitte & Touche LLP.

13             Investment Representation Letter for MFS Government Mortgage
                 Fund.

15 (c)         Distribution  Plan for Class A shares of MFS/Foreign & Colonial
                 International Growth Fund dated September 1, 1995.

<PAGE>


EXHIBIT NO.                        DESCRIPTION OF EXHIBIT

  (d)          Distribution  Plan for Class A shares of MFS/Foreign & Colonial
                 International Growth and Income Fund dated September 1, 1995.

  (e)          Distribution  Plan for Class A shares of MFS/Foreign & Colonial
                 Emerging  Markets Equity Fund dated September 1, 1995.

  (f)          Distribution  Plan for Class B shares of MFS/Foreign & Colonial
                 International Growth Fund dated September 1, 1995.

  (g)          Distribution  Plan for Class B shares of MFS/Foreign & Colonial
                 International Growth and Income Fund dated September 1, 1995.

  (h)          Distribution  Plan for Class B shares of MFS/Foreign & Colonial
                 Emerging  Markets Equity Fund dated September 1, 1995.

27             Financial Data Schedules for each class of MFS Government
                 Mortgage Fund.

<PAGE>
                                                         EXHIBIT NO. 99.5(a)

                         INVESTMENT ADVISORY AGREEMENT




THIS  AGREEMENT,  made this  19th day of  December,  1985,  by and  between  MGH
GOVERNMENT  SECURITIES  HIGH YIELD TRUST,  a  Massachusetts  business trust (the
"Fund"),  and MASSACHUSETTS  FINANCIAL SERVICES COMPANY, a Delaware  corporation
(the "Adviser").

                                  WITNESSETH:

WHEREAS,  the Fund is engaged in  business  as an  open-end  investment  company
registered under the Investment Company Act of 1940;

WHEREAS,  the Adviser is willing to provide business  management services to the
Fund on the terms and conditions hereinafter set forth;

NOW,  THEREFORE,  in consideration of the mutual covenants and agreements of the
parties hereto as herein set forth, the parties covenant and agree as follows:

ARTICLE 1: Duties of the Adviser. The Adviser  shall provide the Fund with such
investment  advice and  supervision as the latter may from time to time consider
necessary  for the proper  management  of its funds.  The  Adviser  shall act as
Adviser to the Fund and as such shall furnish continuously an investment program
and shall determine from time to time what securities  shall be purchased,  sold
or  exchanged  and  what  portion  of the  assets  of the  Fund  shall  be  held
uninvested,  subject  always to the  restrictions  of its  Declaration of Trust,
dated  August  29,  1985,  and  By-Laws,  each  as  amended  from  time  to time
(respectively,  the "Declaration"  and "By-Laws"),  and to the provisions of the
Investment  Company Act of 1940. The Adviser shall also make  recommendations as
to the manner in which voting rights,  rights to consent to corporate action and
any  other  rights  pertaining  to the  Fund's  portfolio  securities  shall  be
exercised.  Should  the  Trustees  at  any  time,  however,  make  any  definite
determination as to investment policy and notify the Adviser thereof in writing,
the  Adviser  shall be  bound  by such  determination  for the  period,  if any,
specified in such notice or until similarly notified that such determination has
been revoked.  The Adviser shall take, on behalf of the Fund,  all actions which
it deems necessary to implement the investment  policies  determined as provided
above,  and in  particular  to place  all  orders  for the  purchase  or sale of
portfolio  securities for the Fund's account with brokers or dealers selected by
it, and to that end the Adviser is  authorized  as the agent of the Fund to give
instructions  to the Custodian of the Fund as to  deliveries  of securities  and
payments of cash for the account of the Fund. In  connection  with the selection
of such  brokers  or dealers  and the  placing of such  orders,  the  Adviser is
directed  to seek for the Fund the most  favorable  execution  and price.  After
fulfilling  this primary  requirement of seeking for the Fund the most favorable
execution  and price,  the Adviser is hereby  expressly  authorized to consider,
subject to
<PAGE>

any  applicable  laws,  rules and  regulation,  statistical,  research and other
information or services furnished to the Adviser or the Fund.

ARTICLE 2: Allocation of Charges and Expenses.  The Adviser shall furnish at its
own expense  investment  advisory and  administrative  services,  office  space,
equipment and clerical personnel  necessary for servicing the investments of the
Trust and maintaining its organization,  and investment  advisory facilities and
executive and  supervisory  personnel for managing the investments and effecting
the portfolio  transactions of the Trust. The Adviser shall arrange,  if desired
by the Trust,  for Directors,  officers and employees of the Adviser to serve as
Trustees,  officers or agents of the Trust if duly  elected or appointed to such
positions and subject to their individual consent and to any limitations imposed
by law.  It is  understood  that  the  Trust  will  pay all of its own  expenses
including,  without  limitation,  compensation of Trustees not "affiliated" with
the Adviser,  governmental fees, interest charges, taxes, membership dues in the
Investment  Company  Institute  allocable  to the Trust,  fees and  expenses  of
independent auditors, of legal counsel and of any transfer agent,  registrar and
dividend  disbursing agent of the Trust,  expenses of repurchasing and redeeming
shares and servicing shareholder accounts,  expenses of preparing,  printing and
mailing share certificates, shareholders' reports, notices, proxy statements and
reports 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 the  custodian for all
services  to the  Trust,  including  safekeeping  of funds  and  securities  and
maintaining  required books and accounts,  expenses of calculating the net asset
value of shares of the Trust, expenses of shareholders'  meetings,  and expenses
relating to the issuance,  registration and qualification of shares of the Trust
and the  preparation,  printing and mailing of  prospectuses  for such  purposes
(except  to the  extent of any  Distribution  Agreement  to which the Trust is a
party provides that another party is to pay some or all of such expenses).

ARTICLE 3: Compensation of the Adviser.  For the services to be rendered and the
facilities  to be  provided,  the Trust shall pay to the  Adviser an  investment
advisory  fee  computed and paid monthly in an amount equal to the sum of .3% of
the  Trust's  average  daily net assets plus 6.1% of the  Trust's  gross  income
(i.e.,  income  other than from the sale of  securities,  short-term  gains from
options and futures  transactions and premium income from options  written),  in
each case on an  annualized  basis for the  Trust's  then-current  fiscal  year.
Payment of the  foregoing  fee is subject to the  provision  that within 30 days
following the close of any fiscal year of the Trust, the Adviser will pay to the
Trust a sum equal to the amount by which the  aggregate  expenses  of the Trust,
but excluding interest, taxes, brokerage commissions and extraordinary expenses,
incurred  during such fiscal year exceed 1 1\2% of the Trust's average daily net
assets during such fiscal year.  The  obligation of the Adviser to reimburse the
Trust for expenses  incurred during any year may be terminated or revised at any
time by the Adviser  without the consent of the Trust by notice in writing  from
the Adviser to the Trust.  If the Adviser shall serve for less than the whole of
any period specified in this Article 3, the compensation to the Adviser shall be
prorated.

ARTICLE 4:  Covenants of the Adviser.  The Adviser  agrees that it will not deal
with  itself,  or with  the  Trustees  of the  Trust  or the  Trust's  principal
underwriter, if any, as principals in making purchases or sales of securities or
other  property  for the  account  of the  Trust,  except  as  permitted  by the
Investment Company Act of 1940 and the Rules,  Regulations or orders thereunder,
will
<PAGE>
not take a long or short position in the shares of the Trust except as permitted
by the Declaration, and will comply with all other provisions of the Declaration
and By-Laws and the then-current Prospectus of the Trust relative to the Adviser
and its Directors and officers.

ARTICLE 5:  Limitation  of Liability of the  Adviser.  The Adviser  shall not 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 Trust, except for willful misfeasance,  bad faith or gross negligence in the
performance of its duties, or by reason of reckless  disregard of its duties and
obligations  hereunder.  As used in this  Article  5, the term  "Adviser"  shall
include  Directors,  officers  and  employees  of the  Adviser  as  well as that
corporation itself.

ARTICLE 6:  Activities of the Adviser.  The services of the Adviser to the Trust
are  not to be  deemed  to be  exclusive,  the  Adviser  being  free  to  render
investment  advisory  and\or  other  services to others.  The Adviser may permit
other fund  clients to use the initials  "MFS" in their names.  The Trust agrees
that if the Adviser  shall for any reason no longer  serve as the Adviser to the
Trust,  the Trust will change its name so as to delete the initials "MFS." It is
understood that Trustees,  officers, and shareholders of the Trust are or may be
or become  interested in the Adviser,  as  Directors,  officers,  employees,  or
otherwise and that  Directors,  officers and employees of the Adviser are or may
be or become  similarly  interested in the Trust, and that the Adviser may be or
become interested in the Trust as a shareholder or otherwise.

ARTICLE  7:  Duration,  Termination  and  Amendments  of  this  Agreement.  This
Agreement  shall  become  effective  on the date first  above  written and shall
govern the relations between the parties hereto thereafter,  and shall remain in
force  until  August  1,  1987  on  which  date  it will  terminate  unless  its
continuance  after August 1, 1987 is  "specifically  approved at least annually"
(i) by the  vote  of a  majority  of the  Trustees  of the  Trust  who  are  not
"interested  persons" of the Trust or of the  Adviser at a meeting  specifically
called  for the  purpose  of voting on such  approval,  and (ii) by the Board of
Trustees  of the Trust,  or by "vote of a  majority  of the  outstanding  voting
securities" of the Trust.

This  Agreement may be terminated at any time without the payment of any penalty
by the Trustees or by "vote of a majority of the outstanding  voting securities"
of the Trust,  or by the Adviser,  in each case on not more than sixty days' nor
less than thirty days' written notice to the other party.  This Agreement  shall
automatically terminate in the event of its "assignment."

This  Agreement may be amended only if such  amendment is approved by "vote of a
majority of the outstanding voting securities" of the Trust.

The terms "specifically  approved at least annually," "vote of a majority of the
outstanding  voting   securities,"   "assignment,"   "affiliated   person,"  and
"interested  person,"  when used in this  Agreement,  shall have the  respective
meanings  specified,  and shall be construed in a manner consistent with, in the
Investment  Company  Act of  1940  and the  Rules  and  Regulations  thereunder,
subject,  however,  to such  exemptions as may be granted by the  Securities and
Exchange Commission under said Act.
<PAGE>

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed
and delivered in their names and on their behalf by the  undersigned,  thereunto
duly authorized,  and their respective seals to be hereto affixed, all as of the
day and year  first  above  written.  The  undersigned  Trustee of the Trust has
executed this Agreement not  individually,  but as Trustee under the Declaration
and the  obligations  of this Agreement are not binding upon any of the Trustees
or shareholders of the Trust, individually, but bind only the trust estate.

                                       MFS GOVERNMENT SECURITIES HIGH
                                         YIELD TRUST



                                       By:     RICHARD B. BAILEY
                                               Richard B. Bailey
                                               Chairman and Trustee



                                       MASSACHUSETTS FINANCIAL SERVICES COMPANY



                                       By:     H. ALDEN JOHNSON, JR.
                                               H. Alden Johnson, Jr.
                                               President

<PAGE>
                                                           EXHIBIT NO. 99.5(b)

                            AMENDMENT TO INVESTMENT
                               ADVISORY AGREEMENT


AMENDMENT dated as of January 1, 1996 to the Investment Advisory Agreement dated
December 19, 1985 by and between MFS Series Trust X  (formerly,  MFS  Government
Securities High Yield Trust) (the "Trust") on behalf of MFS Government  Mortgage
Fund (the "Fund"),  a series of the Trust, and Massachusetts  Financial Services
Company, a Delaware corporation (the "Adviser") (the "Agreement").

                                   WITNESSETH

WHEREAS, the Trust on behalf of the Fund has entered into the Agreement with
the Adviser; and

WHEREAS, MFS has agreed to amend the Agreement as provided below;

NOW THEREFORE,  in  consideration  of the mutual covenants and agreements of the
parties hereto as herein set forth, the parties covenant and agree as follows:

    1.   Amendment of the Agreement:  The first sentence of Article 3 of the
Agreement is deleted and replaced in its entirety as follows:

           "For the services to be rendered and the facilities
           to be provided, the Fund shall pay to the Adviser an
           investment advisory fee computed and paid monthly in
           an amount equal to 0.45% of the Fund's average daily
           net assets on an annualized basis for the Fund's
           then-current fiscal year."

    2.   Miscellaneous:  Except as set forth in this Amendment, the Agreement
shall remain in full force and effect, without amendment or modification.

    3.   Prior Amendments.  This Amendment supercedes any and all previous
amendments to the Agreement.

    4.   Limitation of Liability of the Trustees and Shareholders: A copy of the
Trust's  Declaration  of Trust is on file  with  the  Secretary  of State of The
Commonwealth  of  Massachusetts.   The  parties  hereto   acknowledge  that  the
obligations of or arising out of this instrument are not binding upon any of the
Trust's trustees, officers, employees, agents or shareholders individually,  but
are binding solely upon the assets and property of the Trust in accordance  with
its  proportionate  interest  hereunder.  If this  instrument is executed by the
Trust  on  behalf  of one or  more  series  of the  Trust,  the  parties  hereto
acknowledge  that the assets  and  liabilities  of each  series of the Trust are
separate  and  distinct  and  that the  obligations  of or  arising
<PAGE>
out of this  instrument  are  binding  solely upon the assets or property of the
series on whose behalf the Trust has executed this instrument.  If the Trust has
executed  this  instrument  on behalf of more than one series of the Trust,  the
parties hereto also agree that the obligations of each series hereunder shall be
several and not joint, in accordance with its proportionate  interest hereunder,
and  the  parties  hereto  agree  not to  proceed  against  any  series  for the
obligations of another series.

IN WITNESS  WHEREOF,  the parties have caused this Amendment to the Agreement to
be executed and  delivered in the names and on their behalf by the  undersigned,
therewith duly authorized, all as of the day and year first above written.

                                       MFS SERIES TRUST X, on behalf of
                                          MFS GOVERNMENT MORTGAGE FUND



                                       By:     A. KEITH BRODKIN
                                               A. Keith Brodkin, Chairman


                                       MASSACHUSETTS FINANCIAL SERVICES COMPANY



                                       By:     ARNOLD D. SCOTT
                                               Arnold D. Scott, Senior
                                               Executive Vice President


<PAGE>
                                                            EXHIBIT NO. 99.5(c)

                         INVESTMENT ADVISORY AGREEMENT


INVESTMENT ADVISORY AGREEMENT,  dated as of this 1st day of September,  1995, by
and between MFS SERIES TRUST X, a Massachusetts business trust (the "Trust"), on
behalf of  MFS/FOREIGN & COLONIAL  INTERNATIONAL  GROWTH FUND (the "Fund"),  and
MASSACHUSETTS   FINANCIAL   SERVICES  COMPANY,   a  Delaware   corporation  (the
"Adviser").

                                  WITNESSETH:

         WHEREAS,  the Trust is engaged in business  as an  open-end  investment
company  registered  under the Investment  Company Act of 1940 (the "1940 Act");
and

         WHEREAS, the Adviser is willing to provide business management services
to the Fund on the terms and conditions hereinafter set forth;

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
of the parties  hereto as herein set forth,  the parties  covenant  and agree as
follows:

         ARTICLE 1.  Duties of the Adviser.  The Adviser shall provide the Fund
with such investment  advice and supervision as the latter may from time to time
consider  necessary for the proper  supervision of its funds.  The Adviser shall
act as Adviser to the Fund and as such shall furnish  continuously an investment
program  and  shall  determine  from  time  to time  what  securities  shall  be
purchased, sold or exchanged and what portion of the assets of the Fund shall be
held  uninvested,  subject always to the restrictions of the Trust's Amended and
Restated  Declaration  of Trust,  dated  January 18, 1995 and  By-Laws,  each as
amended from time to time  (respectively,  the "Declaration" and the "By-Laws"),
to the provisions of the 1940 Act and the rules and  regulations  thereunder and
to the Fund's then-current  Prospectus and Statement of Additional  Information.
Should the  Trustees  at any time,  however,  make any  determination  as to the
investment  policy and notify the Adviser thereof in writing,  the Adviser shall
be bound by such  determination for the period, if any, specified in such notice
or until  similarly  notified  that such  determination  shall be  revoked.  The
Adviser shall take, on behalf of the Fund, all actions which it deems  necessary
to implement  the  investment  policies  determined  as provided  above,  and in
particular to place all orders for the purchase or sale of portfolio  securities
for the Fund's account with brokers,  dealers or other entities  selected by it,
and to that  end the  Adviser  is  authorized  as the  agent of the Fund to give
instructions to the Custodian of the Fund as to the deliveries of securities and
payments of cash for the account of the Fund. In  connection  with the selection
of such brokers,  dealers or other entities and the placing of such orders,  the
Adviser is directed to seek for the Fund execution at the most  favorable  price
by responsible  brokerage firms at reasonably  competitive  commission rates. In
fulfilling  this  requirement  the  Adviser  shall not be  deemed to have  acted
unlawfully or to have breached any duty, created by this Agreement or otherwise,
solely by reason of its having caused the Fund to pay a broker,  dealer or
<PAGE>
other entity an amount of commission  for effecting a securities  transaction in
excess of the amount of commission another broker,  dealer or other entity would
have charged for effecting that transaction,  if the Adviser  determined in good
faith that such amount of commission  was reasonable in relation to the value of
the brokerage and research services ( within the meaning of Section 28(e) of the
Securities and Exchange Act of 1934, as amended) provided by such broker, dealer
or other entity,  viewed in terms of either that  particular  transaction or the
Adviser's overall responsibilities with respect to the Fund and to other clients
of the Adviser as to which the Adviser exercises investment discretion.

         The  Adviser may from time to time enter into  investment  sub-advisory
agreements with one or more investment advisers (a "Sub-Adviser") to the Fund to
perform  some or all of the  services  for  which  the  Adviser  is  responsible
pursuant  to this  Article 1 upon such terms and  conditions  as the Adviser may
determine  provided  that  such  investment  sub-advisory  agreements  have been
approved  by a  majority  of the  Trustees  of the Trust who are not  interested
persons of the Trust,  the Adviser or the  Sub-Adviser and by vote of a majority
of the outstanding  voting securities of the Fund. The Adviser may terminate the
services of any  Sub-Adviser  at any time in its sole  discretion,  and shall at
such time assume the  responsibilities  of such  Sub-Adviser  unless and until a
successor  Sub-Adviser is selected.  Subject to the provisions of Article 6, the
Adviser  shall not be liable for any error of  judgment or mistake of law by any
Sub-Adviser  or  for  any  loss  arising  out  of  any  investment  made  by any
Sub-Adviser  or for any act or omission in the execution  and  management of the
Fund by any Sub-Adviser.

         ARTICLE 2.  Allocation  of Charges  and  Expenses.  The  Adviser  shall
furnish at its own expense  investment  advisory  and  administrative  services,
office  space,  equipment  and clerical  personnel  necessary  for servicing the
investments of the Fund and maintaining the Trust's organization, and investment
advisory  facilities  and executive and  supervisory  personnel for managing the
investments  and effecting the portfolio  transactions  of the Fund. The Adviser
shall arrange, if desired by the Trust, for Directors, officers and employees of
the  Adviser  to serve as  Trustees,  officers  or  agents  of the Trust if duly
elected or appointed to such positions and subject to their  individual  consent
and to any limitations  imposed by law. It is understood that the Trust will pay
all of its own expenses including, without limitation,  compensation of Trustees
of the  Trust  who are not  affiliated  persons  of the  Trust  or the  Adviser;
governmental fees;  interest charges;  taxes;  membership dues in the Investment
Company  Institute  allocable  to the Trust;  fees and  expenses of  independent
auditors,  of legal counsel,  and of any transfer  agent,  registrar or dividend
disbursing agent of the Trust; expenses of repurchasing and redeeming shares and
servicing  shareholder  accounts;  expenses of  preparing,  printing and mailing
stock certificates, prospectuses, periodic reports, notices, 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 the custodian
for all services to the Trust,  including  safekeeping of funds and  securities,
keeping books and accounts and  calculation  of the net asset value of shares of
the Fund;  expenses  of  shareholder  meetings;  and  expenses  relating  to the
issuance,  registration  and  qualification  of  shares  of  the  Fund  and  the
preparation,  printing and mailing of prospectuses  for such purposes (except to
the  extent  that any  Distribution  Agreement  to which the Trust is a party on
behalf of the Fund  provides  that  another  party is to pay some or all of such
expenses).
<PAGE>

         ARTICLE 3.  Compensation of the Adviser. For the services to be
rendered and the facilities to be provided, the Fund shall pay to the Adviser an
investment  advisory  fee computed and paid monthly at a rate equal to 0.975% of
the first $500 million of the Fund's  average  daily net assets on an annualized
basis and 0.925% thereafter.  If the Adviser shall serve for less than the whole
of any  period  specified  in this  Article 3, the  compensation  payable to the
Adviser with respect to the Fund will be prorated.

         ARTICLE 4.  Special Services.  Should the Fund have occasion to request
the  Adviser  to perform  services  not herein  contemplated  or to request  the
Adviser to arrange for the services of others, the Adviser will act for the Fund
upon request to the best of its ability,  with  compensation  for the  Adviser's
services to be agreed upon with respect to each such occasion as it arises.

         ARTICLE 5.  Covenants of the Adviser.  The Adviser  agrees that it will
not  deal  with  itself,  or with  the  Trustees  of the  Trust  or the  Trust's
distributor  as principals  in making  purchases or sales of securities or other
property for the account of the Fund,  except as permitted by the 1940 Act, will
not take a long or short position in the shares of the Fund,  except as provided
by the Declaration, and will comply with all other provisions of the Declaration
and By-Laws relative to the Adviser and its Directors and officers.

         ARTICLE 6.  Limitation of Liability of the Adviser. The Adviser and its
Directors, officers and employees, shall not 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 Fund,  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 hereunder.

         ARTICLE 7.  Activities  of the Adviser.  The services of the Adviser to
the Fund are not to be deemed to be exclusive,  the Adviser being free to render
services to others.  The Adviser may permit  other fund clients to use the words
"Massachusetts  Financial" or "MFS" in their names.  The Fund agrees that if the
Adviser  shall for any reason no longer  serve as the  Adviser to the Fund,  the
Fund will change its name so as to delete the words "Massachusetts Financial" or
"MFS".  It is understood  that the Trustees,  officers and  shareholders  of the
Trust are or may be or become interested in the Adviser, as Directors, officers,
employees,  or  otherwise  and that  Directors,  officers  and  employees of the
Adviser are or may become similarly interested in the Trust and that the Adviser
may be or become interested in the Trust as a shareholder or otherwise.

         ARTICLE 8.  Duration, Termination and Amendment of this Agreement. This
Agreement  shall become  effective on the date of its execution and shall govern
the relations between the parties hereto  thereafter,  and shall remain in force
until  August  1,  1997  and  each  year  thereafter  but  only  so  long as its
continuance  is  specifically  approved at least  annually  (i) by the vote of a
majority  of the  Trustees  of the Trust who are not  interested  persons of the
Trust or of the  Adviser at a meeting  specifically  called  for the  purpose of
voting on such approval,  and (ii)
<PAGE>
by the Trustees of the Trust, or by vote of a majority of the outstanding voting
securities of the Fund.

         This Agreement may be terminated at any time without the payment of any
penalty by the Trustees of the Trust or by vote of a majority of the outstanding
voting  securities of the Fund, or by the Adviser,  on not more than sixty days'
nor less than thirty days'  written  notice to the other party.  This  Agreement
shall automatically terminate in the event of its assignment.

         This  Agreement  may be amended  only if such  amendment is approved by
vote of a majority of the outstanding voting securities of the Fund.

         ARTICLE 9:  Certain  Terms.  The  terms  "vote  of a  majority  of the
outstanding voting securities,"  "assignment,"  "specifically  approved at least
annually,"  "affiliated  person"  and  "interested  persons,"  when used in this
Agreement,  shall have the respective meanings specified in the 1940 Act and the
rules and regulations thereunder,  subject, however, to such exemption as may be
granted by the Securities and Exchange Commission under the 1940 Act.

         ARTICLE 10: Record Keeping. The Adviser will maintain records in a form
acceptable to the Trust and in compliance  with the rules and regulations of the
Securities  and  Exchange  Commission,  including  but not  limited  to  records
required  to be  maintained  by Section  31(a) of the 1940 Act and the rules and
regulations thereunder, which at all times will be the property of the Trust and
will be available for inspection and use by the Trust.

         ARTICLE 11: Limitation of Liability of the Trustees and Shareholders. A
copy of the  Declaration  of the Trust is on file with Secretary of State of The
Commonwealth  of  Massachusetts.   The  parties  hereto   acknowledge  that  the
obligations of or arising out of this instrument are not binding upon any of the
Trust's trustees, officers, employees, agents or shareholders individually,  but
are binding solely upon the assets and property of the Trust in accordance  with
its  proportionate  interest  hereunder.  If this  instrument is executed by the
Trust  on  behalf  of one or  more  series  of the  Trust,  the  parties  here
acknowledge  that the assets  and  liabilities  of each  series of the Trust are
separate  and  distinct  and  that the  obligations  of or  arising  out of this
instrument are binding solely upon the assets or property of the series on whose
behalf the Trust has executed  this  instrument.  If the Trust has executed this
instrument on behalf of one or more series of the Trust, the parties hereto also
agree that the  obligations  of each series  hereunder  shall be several and not
joint, in accordance with its proportionate interest hereunder,  and the parties
hereto agree not to proceed  against any series for the  obligations  of another
series.
<PAGE>
         IN WITNESS  WHEREOF,  the  parties  have caused  this  Agreement  to be
executed and  delivered  in their names and on their behalf by the  undersigned,
thereunto duly authorized,  and their respective seals to be hereto affixed, all
as of the day and year first written above.

                                       MFS SERIES TRUST X on behalf of the
                                         MFS/FOREIGN & COLONIAL INTERNATIONAL
                                         GROWTH FUND


                                       By:     A. KEITH BRODKIN
                                               A. Keith Brodkin
                                               Chairman and Trustee



                                       MASSACHUSETTS FINANCIAL SERVICES COMPANY



                                       By:     JEFFREY L. SHAMES
                                               Jeffrey L. Shames
                                               President

<PAGE>
                                                            EXHIBIT NO. 99.5(d)

                         INVESTMENT ADVISORY AGREEMENT


INVESTMENT ADVISORY AGREEMENT,  dated as of this 1st day of September,  1995, by
and between MFS SERIES TRUST X, a Massachusetts business trust (the "Trust"), on
behalf of  MFS/FOREIGN  & COLONIAL  INTERNATIONAL  GROWTH  AND INCOME  FUND (the
"Fund"),  and MASSACHUSETTS  FINANCIAL SERVICES COMPANY, a Delaware  corporation
(the "Adviser").

                                  WITNESSETH:

         WHEREAS,  the Trust is engaged in business  as an  open-end  investment
company  registered  under the Investment  Company Act of 1940 (the "1940 Act");
and

         WHEREAS, the Adviser is willing to provide business management services
to the Fund on the terms and conditions hereinafter set forth;

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
of the parties  hereto as herein set forth,  the parties  covenant  and agree as
follows:

         ARTICLE 1.  Duties of the Adviser. The Adviser  shall  provide the Fund
with such investment  advice and supervision as the latter may from time to time
consider  necessary for the proper  supervision of its funds.  The Adviser shall
act as Adviser to the Fund and as such shall furnish  continuously an investment
program  and  shall  determine  from  time  to time  what  securities  shall  be
purchased, sold or exchanged and what portion of the assets of the Fund shall be
held  uninvested,  subject always to the restrictions of the Trust's Amended and
Restated  Declaration  of Trust,  dated  January 18, 1995 and  By-Laws,  each as
amended from time to time  (respectively,  the "Declaration" and the "By-Laws"),
to the provisions of the 1940 Act and the rules and  regulations  thereunder and
to the Fund's then-current  Prospectus and Statement of Additional  Information.
Should the  Trustees  at any time,  however,  make any  determination  as to the
investment  policy and notify the Adviser thereof in writing,  the Adviser shall
be bound by such  determination for the period, if any, specified in such notice
or until  similarly  notified  that such  determination  shall be  revoked.  The
Adviser shall take, on behalf of the Fund, all actions which it deems  necessary
to implement  the  investment  policies  determined  as provided  above,  and in
particular to place all orders for the purchase or sale of portfolio  securities
for the Fund's account with brokers,  dealers or other entities  selected by it,
and to that  end the  Adviser  is  authorized  as the  agent of the Fund to give
instructions to the Custodian of the Fund as to the deliveries of securities and
payments of cash for the account of the Fund. In  connection  with the selection
of such brokers,  dealers or other entities and the placing of such orders,  the
Adviser is directed to seek for the Fund execution at the most  favorable  price
by responsible  brokerage firms at reasonably  competitive  commission rates. In
fulfilling  this  requirement  the  Adviser  shall not be  deemed to have  acted
unlawfully or to have breached any duty, created by this Agreement or otherwise,
solely by reason of its having caused the Fund to pay a broker,  dealer or
<PAGE>
other entity an amount of commission  for effecting a securities  transaction in
excess of the amount of commission another broker,  dealer or other entity would
have charged for effecting that transaction,  if the Adviser  determined in good
faith that such amount of commission  was reasonable in relation to the value of
the brokerage and research services ( within the meaning of Section 28(e) of the
Securities and Exchange Act of 1934, as amended) provided by such broker, dealer
or other entity,  viewed in terms of either that  particular  transaction or the
Adviser's overall responsibilities with respect to the Fund and to other clients
of the Adviser as to which the Adviser exercises investment discretion.

         The  Adviser may from time to time enter into  investment  sub-advisory
agreements with one or more investment advisers (a "Sub-Adviser") to the Fund to
perform  some or all of the  services  for  which  the  Adviser  is  responsible
pursuant  to this  Article 1 upon such terms and  conditions  as the Adviser may
determine  provided  that  such  investment  sub-advisory  agreements  have been
approved  by a  majority  of the  Trustees  of the Trust who are not  interested
persons of the Trust,  the Adviser or the  Sub-Adviser and by vote of a majority
of the outstanding  voting securities of the Fund. The Adviser may terminate the
services of any  Sub-Adviser  at any time in its sole  discretion,  and shall at
such time assume the  responsibilities  of such  Sub-Adviser  unless and until a
successor  Sub-Adviser is selected.  Subject to the provisions of Article 6, the
Adviser  shall not be liable for any error of  judgment or mistake of law by any
Sub-Adviser  or  for  any  loss  arising  out  of  any  investment  made  by any
Sub-Adviser  or for any act or omission in the execution  and  management of the
Fund by any Sub-Adviser.

         ARTICLE 2.  Allocation  of Charges  and  Expenses.  The  Adviser  shall
furnish at its own expense  investment  advisory  and  administrative  services,
office  space,  equipment  and clerical  personnel  necessary  for servicing the
investments of the Fund and maintaining the Trust's organization, and investment
advisory  facilities  and executive and  supervisory  personnel for managing the
investments  and effecting the portfolio  transactions  of the Fund. The Adviser
shall arrange, if desired by the Trust, for Directors, officers and employees of
the  Adviser  to serve as  Trustees,  officers  or  agents  of the Trust if duly
elected or appointed to such positions and subject to their  individual  consent
and to any limitations  imposed by law. It is understood that the Trust will pay
all of its own expenses including, without limitation,  compensation of Trustees
of the  Trust  who are not  affiliated  persons  of the  Trust  or the  Adviser;
governmental fees;  interest charges;  taxes;  membership dues in the Investment
Company  Institute  allocable  to the Trust;  fees and  expenses of  independent
auditors,  of legal counsel,  and of any transfer  agent,  registrar or dividend
disbursing agent of the Trust; expenses of repurchasing and redeeming shares and
servicing  shareholder  accounts;  expenses of  preparing,  printing and mailing
stock certificates, prospectuses, periodic reports, notices, 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 the custodian
for all services to the Trust,  including  safekeeping of funds and  securities,
keeping books and accounts and  calculation  of the net asset value of shares of
the Fund;  expenses  of  shareholder  meetings;  and  expenses  relating  to the
issuance,  registration  and  qualification  of  shares  of  the  Fund  and  the
preparation,  printing and mailing of prospectuses  for such purposes (except to
the  extent  that any  Distribution  Agreement  to which the Trust is a party on
behalf of the Fund  provides  that  another  party is to pay some or all of such
expenses).
<PAGE>

         ARTICLE 3.  Compensation of the Adviser. For the services to be
rendered and the facilities to be provided, the Fund shall pay to the Adviser an
investment  advisory  fee computed and paid monthly at a rate equal to 0.975% of
the first $500 million of the Fund's  average  daily net assets on an annualized
basis and 0.925% thereafter.  If the Adviser shall serve for less than the whole
of any  period  specified  in this  Article 3, the  compensation  payable to the
Adviser with respect to the Fund will be prorated.

         ARTICLE 4.  Special Services. Should the Fund have occasion to request
the  Adviser  to perform  services  not herein  contemplated  or to request  the
Adviser to arrange for the services of others, the Adviser will act for the Fund
upon request to the best of its ability,  with  compensation  for the  Adviser's
services to be agreed upon with respect to each such occasion as it arises.

         ARTICLE 5.  Covenants of the Adviser.  The Adviser  agrees that it will
not  deal  with  itself,  or with  the  Trustees  of the  Trust  or the  Trust's
distributor  as principals  in making  purchases or sales of securities or other
property for the account of the Fund,  except as permitted by the 1940 Act, will
not take a long or short position in the shares of the Fund,  except as provided
by the Declaration, and will comply with all other provisions of the Declaration
and By-Laws relative to the Adviser and its Directors and officers.

         ARTICLE 6.  Limitation of Liability of the Adviser. The Adviser and its
Directors, officers and employees, shall not 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 Fund,  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 hereunder.

         ARTICLE 7.  Activities  of the Adviser.  The services of the Adviser to
the Fund are not to be deemed to be exclusive,  the Adviser being free to render
services to others.  The Adviser may permit  other fund clients to use the words
"Massachusetts  Financial" or "MFS" in their names.  The Fund agrees that if the
Adviser  shall for any reason no longer  serve as the  Adviser to the Fund,  the
Fund will change its name so as to delete the words "Massachusetts Financial" or
"MFS".  It is understood  that the Trustees,  officers and  shareholders  of the
Trust are or may be or become interested in the Adviser, as Directors, officers,
employees,  or  otherwise  and that  Directors,  officers  and  employees of the
Adviser are or may become similarly interested in the Trust and that the Adviser
may be or become interested in the Trust as a shareholder or otherwise.

         ARTICLE 8.  Duration, Termination and Amendment of this Agreement. This
Agreement  shall become  effective on the date of its execution and shall govern
the relations between the parties hereto  thereafter,  and shall remain in force
until  August  1,  1997  and  each  year  thereafter  but  only  so  long as its
continuance  is  specifically  approved at least  annually  (i) by the vote of a
majority  of the  Trustees  of the Trust who are not  interested  persons of the
Trust or of the  Adviser at a meeting  specifically  called  for the  purpose of
voting on such approval,  and (ii)
<PAGE>

by the Trustees of the Trust, or by vote of a majority of the outstanding voting
securities of the Fund.

         This Agreement may be terminated at any time without the payment of any
penalty by the Trustees of the Trust or by vote of a majority of the outstanding
voting  securities of the Fund, or by the Adviser,  on not more than sixty days'
nor less than thirty days'  written  notice to the other party.  This  Agreement
shall automatically terminate in the event of its assignment.

         This  Agreement  may be amended  only if such  amendment is approved by
vote of a majority of the outstanding voting securities of the Fund.

         ARTICLE 9:  Certain  Terms.  The  terms  "vote  of a  majority  of the
outstanding voting securities,"  "assignment,"  "specifically  approved at least
annually,"  "affiliated  person"  and  "interested  persons,"  when used in this
Agreement,  shall have the respective meanings specified in the 1940 Act and the
rules and regulations thereunder,  subject, however, to such exemption as may be
granted by the Securities and Exchange Commission under the 1940 Act.

         ARTICLE 10: Record Keeping. The Adviser will maintain records in a form
acceptable to the Trust and in compliance  with the rules and regulations of the
Securities  and  Exchange  Commission,  including  but not  limited  to  records
required  to be  maintained  by Section  31(a) of the 1940 Act and the rules and
regulations thereunder, which at all times will be the property of the Trust and
will be available for inspection and use by the Trust.

         ARTICLE 11: Limitation of Liability of the Trustees and Shareholders. A
copy of the  Declaration  of the Trust is on file with Secretary of State of The
Commonwealth  of  Massachusetts.   The  parties  hereto   acknowledge  that  the
obligations of or arising out of this instrument are not binding upon any of the
Trust's trustees, officers, employees, agents or shareholders individually,  but
are binding solely upon the assets and property of the Trust in accordance  with
its  proportionate  interest  hereunder.  If this  instrument is executed by the
Trust  on  behalf  of one or  more  series  of the  Trust,  the  parties  hereto
acknowledge  that the assets  and  liabilities  of each  series of the Trust are
separate  and  distinct  and  that the  obligations  of or  arising  out of this
instrument are binding solely upon the assets or property of the series on whose
behalf the Trust has executed  this  instrument.  If the Trust has executed this
instrument on behalf of one or more series of the Trust, the parties hereto also
agree that the  obligations  of each series  hereunder  shall be several and not
joint, in accordance with its proportionate interest hereunder,  and the parties
hereto agree not to proceed  against any series for the  obligations  of another
series.
<PAGE>

         IN WITNESS  WHEREOF,  the  parties  have caused  this  Agreement  to be
executed and  delivered  in their names and on their behalf by the  undersigned,
thereunto duly authorized,  and their respective seals to be hereto affixed, all
as of the day and year first written above.

                                       MFS SERIES TRUST X on behalf of the
                                         MFS/FOREIGN & COLONIAL INTERNATIONAL
                                         GROWTH AND INCOME FUND


                                       By:     A. KEITH BRODKIN
                                               A. Keith Brodkin
                                               Chairman and Trustee



                                       MASSACHUSETTS FINANCIAL SERVICES COMPANY



                                       By:     JEFFREY L. SHAMES
                                               Jeffrey L. Shames
                                               President

<PAGE>
                                                            EXHIBIT NO. 99.5(e)

                         INVESTMENT ADVISORY AGREEMENT


INVESTMENT ADVISORY AGREEMENT,  dated as of this 1st day of September,  1995, by
and between MFS SERIES TRUST X, a Massachusetts business trust (the "Trust"), on
behalf of MFS/FOREIGN & COLONIAL EMERGING MARKETS EQUITY FUND (the "Fund"),  and
MASSACHUSETTS   FINANCIAL   SERVICES  COMPANY,   a  Delaware   corporation  (the
"Adviser").

                                  WITNESSETH:

         WHEREAS,  the Trust is engaged in business  as an  open-end  investment
company  registered  under the Investment  Company Act of 1940 (the "1940 Act");
and

         WHEREAS, the Adviser is willing to provide business management services
to the Fund on the terms and conditions hereinafter set forth;

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
of the parties  hereto as herein set forth,  the parties  covenant  and agree as
follows:

         ARTICLE 1.  Duties of the Adviser. The Adviser  shall  provide the Fund
with such investment  advice and supervision as the latter may from time to time
consider  necessary for the proper  supervision of its funds.  The Adviser shall
act as Adviser to the Fund and as such shall furnish  continuously an investment
program  and  shall  determine  from  time  to time  what  securities  shall  be
purchased, sold or exchanged and what portion of the assets of the Fund shall be
held  uninvested,  subject always to the restrictions of the Trust's Amended and
Restated  Declaration  of Trust,  dated  January 18, 1995 and  By-Laws,  each as
amended from time to time  (respectively,  the "Declaration" and the "By-Laws"),
to the provisions of the 1940 Act and the rules and  regulations  thereunder and
to the Fund's then-current  Prospectus and Statement of Additional  Information.
Should the  Trustees  at any time,  however,  make any  determination  as to the
investment  policy and notify the Adviser thereof in writing,  the Adviser shall
be bound by such  determination for the period, if any, specified in such notice
or until  similarly  notified  that such  determination  shall be  revoked.  The
Adviser shall take, on behalf of the Fund, all actions which it deems  necessary
to implement  the  investment  policies  determined  as provided  above,  and in
particular to place all orders for the purchase or sale of portfolio  securities
for the Fund's account with brokers,  dealers or other entities  selected by it,
and to that  end the  Adviser  is  authorized  as the  agent of the Fund to give
instructions to the Custodian of the Fund as to the deliveries of securities and
payments of cash for the account of the Fund. In  connection  with the selection
of such brokers,  dealers or other entities and the placing of such orders,  the
Adviser is directed to seek for the Fund execution at the most  favorable  price
by responsible  brokerage firms at reasonably  competitive  commission rates. In
fulfilling  this  requirement  the  Adviser  shall not be  deemed to have  acted
unlawfully or to have breached any duty, created by this Agreement or otherwise,
solely by reason of its having caused the Fund to pay a broker,  dealer or
<PAGE>
other entity an amount of commission  for effecting a securities  transaction in
excess of the amount of commission another broker,  dealer or other entity would
have charged for effecting that transaction,  if the Adviser  determined in good
faith that such amount of commission  was reasonable in relation to the value of
the brokerage and research services ( within the meaning of Section 28(e) of the
Securities and Exchange Act of 1934, as amended) provided by such broker, dealer
or other entity,  viewed in terms of either that  particular  transaction or the
Adviser's overall responsibilities with respect to the Fund and to other clients
of the Adviser as to which the Adviser exercises investment discretion.

         The  Adviser may from time to time enter into  investment  sub-advisory
agreements with one or more investment advisers (a "Sub-Adviser") to the Fund to
perform  some or all of the  services  for  which  the  Adviser  is  responsible
pursuant  to this  Article 1 upon such terms and  conditions  as the Adviser may
determine  provided  that  such  investment  sub-advisory  agreements  have been
approved  by a  majority  of the  Trustees  of the Trust who are not  interested
persons of the Trust,  the Adviser or the  Sub-Adviser and by vote of a majority
of the outstanding  voting securities of the Fund. The Adviser may terminate the
services of any  Sub-Adviser  at any time in its sole  discretion,  and shall at
such time assume the  responsibilities  of such  Sub-Adviser  unless and until a
successor  Sub-Adviser is selected.  Subject to the provisions of Article 6, the
Adviser  shall not be liable for any error of  judgment or mistake of law by any
Sub-Adviser  or  for  any  loss  arising  out  of  any  investment  made  by any
Sub-Adviser  or for any act or omission in the execution  and  management of the
Fund by any Sub-Adviser.

         ARTICLE 2.  Allocation  of Charges  and  Expenses.  The  Adviser  shall
furnish at its own expense  investment  advisory  and  administrative  services,
office  space,  equipment  and clerical  personnel  necessary  for servicing the
investments of the Fund and maintaining the Trust's organization, and investment
advisory  facilities  and executive and  supervisory  personnel for managing the
investments  and effecting the portfolio  transactions  of the Fund. The Adviser
shall arrange, if desired by the Trust, for Directors, officers and employees of
the  Adviser  to serve as  Trustees,  officers  or  agents  of the Trust if duly
elected or appointed to such positions and subject to their  individual  consent
and to any limitations  imposed by law. It is understood that the Trust will pay
all of its own expenses including, without limitation,  compensation of Trustees
of the  Trust  who are not  affiliated  persons  of the  Trust  or the  Adviser;
governmental fees;  interest charges;  taxes;  membership dues in the Investment
Company  Institute  allocable  to the Trust;  fees and  expenses of  independent
auditors,  of legal counsel,  and of any transfer  agent,  registrar or dividend
disbursing agent of the Trust; expenses of repurchasing and redeeming shares and
servicing  shareholder  accounts;  expenses of  preparing,  printing and mailing
stock certificates, prospectuses, periodic reports, notices, 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 the custodian
for all services to the Trust,  including  safekeeping of funds and  securities,
keeping books and accounts and  calculation  of the net asset value of shares of
the Fund;  expenses  of  shareholder  meetings;  and  expenses  relating  to the
issuance,  registration  and  qualification  of  shares  of  the  Fund  and  the
preparation,  printing and mailing of prospectuses  for such purposes (except to
the  extent  that any  Distribution  Agreement  to which the Trust is a party on
behalf of the Fund  provides  that  another  party is to pay some or all of such
expenses).
<PAGE>

         ARTICLE 3.  Compensation of the Adviser. For the services to be
rendered and the facilities to be provided, the Fund shall pay to the Adviser an
investment  advisory  fee  computed and paid monthly at a rate equal to 1.25% of
the Fund's average daily net assets on an annualized basis. If the Adviser shall
serve for less than the whole of any  period  specified  in this  Article 3, the
compensation payable to the Adviser with respect to the Fund will be prorated.

         ARTICLE 4.  Special Services.  Should the Fund have occasion to request
the  Adviser  to perform  services  not herein  contemplated  or to request  the
Adviser to arrange for the services of others, the Adviser will act for the Fund
upon request to the best of its ability,  with  compensation  for the  Adviser's
services to be agreed upon with respect to each such occasion as it arises.

         ARTICLE 5.  Covenants of the Adviser.  The Adviser  agrees that it will
not  deal  with  itself,  or with  the  Trustees  of the  Trust  or the  Trust's
distributor  as principals  in making  purchases or sales of securities or other
property for the account of the Fund,  except as permitted by the 1940 Act, will
not take a long or short position in the shares of the Fund,  except as provided
by the Declaration, and will comply with all other provisions of the Declaration
and By-Laws relative to the Adviser and its Directors and officers.

         ARTICLE 6.  Limitation of Liability of the Adviser. The Adviser and its
Directors, officers and employees, shall not 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 Fund,  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 hereunder.

         ARTICLE 7.  Activities  of the Adviser.  The services of the Adviser to
the Fund are not to be deemed to be exclusive,  the Adviser being free to render
services to others.  The Adviser may permit  other fund clients to use the words
"Massachusetts  Financial" or "MFS" in their names.  The Fund agrees that if the
Adviser  shall for any reason no longer  serve as the  Adviser to the Fund,  the
Fund will change its name so as to delete the words "Massachusetts Financial" or
"MFS".  It is understood  that the Trustees,  officers and  shareholders  of the
Trust are or may be or become interested in the Adviser, as Directors, officers,
employees,  or  otherwise  and that  Directors,  officers  and  employees of the
Adviser are or may become similarly interested in the Trust and that the Adviser
may be or become interested in the Trust as a shareholder or otherwise.

         ARTICLE 8.  Duration, Termination and Amendment of this Agreement. This
Agreement  shall become  effective on the date of its execution and shall govern
the relations between the parties hereto  thereafter,  and shall remain in force
until  August  1,  1997  and  each  year  thereafter  but  only  so  long as its
continuance  is  specifically  approved at least  annually  (i) by the vote of a
majority  of the  Trustees  of the Trust who are not  interested  persons of the
Trust or of the  Adviser at a meeting  specifically  called  for the  purpose of
voting on such approval,  and (ii) by the Trustees of the Trust, or by vote of a
majority of the outstanding voting securities of the Fund.
<PAGE>

         This Agreement may be terminated at any time without the payment of any
penalty by the Trustees of the Trust or by vote of a majority of the outstanding
voting  securities of the Fund, or by the Adviser,  on not more than sixty days'
nor less than thirty days'  written  notice to the other party.  This  Agreement
shall automatically terminate in the event of its assignment.

         This  Agreement  may be amended  only if such  amendment is approved by
vote of a majority of the outstanding voting securities of the Fund.

         ARTICLE 9:  Certain  Terms.  The  terms  "vote  of a  majority  of the
outstanding voting securities,"  "assignment,"  "specifically  approved at least
annually,"  "affiliated  person"  and  "interested  persons,"  when used in this
Agreement,  shall have the respective meanings specified in the 1940 Act and the
rules and regulations thereunder,  subject, however, to such exemption as may be
granted by the Securities and Exchange Commission under the 1940 Act.

         ARTICLE 10: Record Keeping. The Adviser will maintain records in a form
acceptable to the Trust and in compliance  with the rules and regulations of the
Securities  and  Exchange  Commission,  including  but not  limited  to  records
required  to be  maintained  by Section  31(a) of the 1940 Act and the rules and
regulations thereunder, which at all times will be the property of the Trust and
will be available for inspection and use by the Trust.

         ARTICLE 11: Limitation of Liability of the Trustees and Shareholders. A
copy of the  Declaration  of the Trust is on file with Secretary of State of The
Commonwealth  of  Massachusetts.   The  parties  hereto   acknowledge  that  the
obligations of or arising out of this instrument are not binding upon any of the
Trust's trustees, officers, employees, agents or shareholders individually,  but
are binding solely upon the assets and property of the Trust in accordance  with
its  proportionate  interest  hereunder.  If this  instrument is executed by the
Trust  on  behalf  of one or  more  series  of the  Trust,  the  parties  hereto
acknowledge  that the assets  and  liabilities  of each  series of the Trust are
separate  and  distinct  and  that the  obligations  of or  arising  out of this
instrument are binding solely upon the assets or property of the series on whose
behalf the Trust has executed  this  instrument.  If the Trust has executed this
instrument on behalf of one or more series of the Trust, the parties hereto also
agree that the  obligations  of each series  hereunder  shall be several and not
joint, in accordance with its proportionate interest hereunder,  and the parties
hereto agree not to proceed  against any series for the  obligations  of another
series.
<PAGE>

         IN WITNESS  WHEREOF,  the  parties  have caused  this  Agreement  to be
executed and  delivered  in their names and on their behalf by the  undersigned,
thereunto duly authorized,  and their respective seals to be hereto affixed, all
as of the day and year first written above.

                                       MFS SERIES TRUST X on behalf of the
                                         MFS/FOREIGN & COLONIAL EMERGING
                                         MARKETS EQUITY FUND



                                       By:     A. KEITH BRODKIN
                                               A. Keith Brodkin
                                               Chairman and Trustee




                                        MASSACHUSETTS FINANCIAL SERVICES COMPANY



                                       By:     JEFFREY L. SHAMES
                                               Jeffrey L. Shames
                                               President

<PAGE>
                                                           EXHIBIT NO. 99.5(f)


                             SUB-ADVISORY AGREEMENT


         SUB-ADVISORY AGREEMENT, dated this 1st day of September,  1995, by and
between MASSACHUSETTS FINANCIAL SERVICES COMPANY, a Delaware corporation (the
"Adviser") and FOREIGN & COLONIAL MANAGEMENT LTD., a company  incorporated under
the laws of England and Wales (the "Sub-Adviser").


                                  WITNESSETH:


         WHEREAS,  the Adviser  provides  MFS/Foreign  & Colonial  International
Growth  Fund (the  "Fund"),  a series of MFS Series  Trust X (the  "Trust"),  an
open-end investment company registered under the Investment Company Act of 1940,
as  amended  (the  "1940  Act"),  business  services  pursuant  to the terms and
conditions  of an investment  advisory  agreement  dated  September 1, 1995 (the
"Advisory  Agreement") between the Adviser and the Trust, on behalf of the Fund;
and

         WHEREAS,  the Sub-Adviser is willing to provide services to the Adviser
on the terms and conditions hereinafter set forth.

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
of the parties  hereto as herein set forth,  the parties  covenant  and agree as
follows:


         1.  Duties  of  the  Sub-Adviser.  Subject  to the  supervision  of the
Trustees of the Trust and the Adviser,  the  Sub-Adviser  will:  (a) manage such
Fund's  assets on behalf of the Fund in  accordance  with the Fund's  investment
objective,  policies  and  limitations  as stated  in the  Fund's  then  current
Prospectus  (the  "Prospectus")  and  Statement of Additional  Information  (the
"Statement"),  and the Trust's  Amended and Restated  Declaration of Trust dated
January 18, 1995 and Amended and Restated By-Laws,  each as from time to time in
effect  (respectively,  the  "Declaration"  and the "By-Laws") and in compliance
with the 1940 Act and the rules,  regulations  and orders  thereunder;  (b) make
investment  decisions  for the Fund;  (c) place  purchase  and sale  orders  for
portfolio transactions for the Fund; (d) manage otherwise uninvested cash assets
of the Fund; (e) as the agent of the Fund, give  instructions  (including  trade
tickets) to the custodian and any  sub-custodian of the Fund as to deliveries of
securities,  transfers of currencies and payments of cash for the account of the
Fund (the Sub-Adviser  shall promptly notify the Adviser of such  instructions);
(f) employ  professional  portfolio managers to provide research services to the
Fund; (g) attend periodic meetings of the Board of Trustees of the Trust and (h)
obtain all the  registrations,  qualifications  and  consents,  on behalf of the
Fund,  which are  necessary  for the Fund to  purchase  and sell  assets in each
jurisdiction (other than the United States) in which the Fund's assets are to be
invested (the Sub-Adviser  shall promptly provide the Adviser with copies of any
such registrations,  qualifications and consents).  In providing these services,
the Sub-Adviser will furnish  continuously an investment program with respect to
the Fund's  assets.  The  Sub-Adviser  shall be  responsible  for monitoring the
Fund's  compliance  with
<PAGE>
the Prospectus, the Statement, the Declaration, the By-Laws and the 1940 Act and
the rules,  regulations and orders  thereunder and in monitoring such compliance
the Sub-Adviser shall do so in the functional  currency of the Fund. The Adviser
agrees to provide the  Sub-Adviser  with such  assistance  as may be  reasonably
requested  by the  Sub-Adviser  in  connection  with its  activities  under this
Agreement,  including, without limitation,  information concerning the Fund, its
funds available, or to become available,  for investment and generally as to the
conditions of the Fund's affairs.  From time to time the Adviser will notify the
Sub-Adviser  of the  aggregate  U.S.  Dollar  amount of the Fund's  assets.  The
Adviser will have responsibility for exercising proxy,  consent and other rights
pertaining  to the Fund's  portfolio  securities;  provided,  however,  that the
Sub-Adviser will, as requested,  make  recommendations  to the Adviser as to the
manner in which such proxy, consent and other rights shall be exercised.

         Should the  Trustees  of the Trust or the  Adviser at any time make any
determination  as to  investment  policy and notify the  Sub-Adviser  thereof in
writing, the Sub-Adviser shall be bound by such determination for the period, if
any, specified in such notice or until notified that such determination has been
revoked. Further, the Adviser or the Trustees of the Trust may at any time, upon
written  notice  to the  Sub-Adviser,  suspend  or  restrict  the  right  of the
Sub-Adviser  to determine what assets of the Fund shall be purchased or sold and
what  portion,  if any, of the Fund's  assets  shall be held  uninvested.  It is
understood that the Adviser  undertakes to discuss with the Sub-Adviser any such
determinations  of investment  policy and any such suspension or restrictions on
the right of the  Sub-Adviser  to  determine  what  assets of the Fund  shall be
purchased or sold or held uninvested, prior to the implementation thereof.


         2.  Certain Information to the  Sub-Adviser.  Copies of the Prospectus,
the  Statement,  the  Declaration  and the By-Laws  have been  delivered  to the
Sub-Adviser.  The Adviser agrees to notify the Sub-Adviser of each change in the
investment policies of the Fund and to provide to the Sub-Adviser as promptly as
practicable  copies of all amendments and  supplements  to the  Prospectus,  the
Statement,  the  Declaration  and the  By-Laws.  In  addition,  the Adviser will
promptly  provide  the  Sub-Adviser  with  any  procedures   applicable  to  the
Sub-Adviser adopted from time to time by the Trustees of the Trust and agrees to
provide promptly to the Sub-Adviser copies of all amendments thereto.

         3.  Execution  of  Certain  Documents.  Subject  to any  other  written
instructions  of the Adviser and the Trustees of the Trust,  the  Sub-Adviser is
hereby  appointed the Adviser's  and the Trust's agent and  attorney-in-fact  to
execute account documentation,  agreements, contracts and other documents as the
Sub-Adviser  shall be requested by brokers,  dealers,  counterparties  and other
persons in connection with its management of the assets of the Fund.

         4.  Reports. The Sub-Adviser shall furnish to the Trustees of the Trust
or the  Adviser,  or  both,  as may be  appropriate,  quarterly  reports  of its
activities on behalf of the Fund, as required by applicable  law or as otherwise
requested  from time to time by the  Trustees of the Trust or the  Adviser,  and
such additional information,  reports, evaluations, analyses and opinions as the
Trustees of the Trust or the Adviser,  as appropriate,  may request from time to
time.
<PAGE>

         5.  Brokerage. In connection with the selections of brokers, dealers or
other  entities and the placing of orders for the purchase and sale of portfolio
investments  for the Fund,  the  Sub-Adviser  is  directed  to seek for the Fund
execution  at the  most  favorable  price  by  responsible  brokerage  firms  at
reasonably  competitive  commission rates. In fulfilling this  requirement,  the
Sub-Adviser shall not be deemed to have acted unlawfully or to have breached any
duty,  created by this  Agreement or  otherwise,  solely by reason of its having
caused the Fund to pay a broker,  dealer or other entity an amount of commission
for  effecting a securities  transaction  in excess of the amount of  commission
another  broker,  dealer or other entity would have charged for  effecting  that
transaction,  if the  Sub-Adviser  determined  in good faith that such amount of
commission was reasonable in relation to the value of the brokerage and research
services (within the meaning of Section 28(e) of the Securities  Exchange Act of
1934, as amended)  provided by such broker,  dealer or other  entity,  viewed in
terms  of  either  that  particular  transaction  or the  Sub-Adviser's  overall
responsibilities  with  respect  to  the  Fund  and  to  other  clients  of  the
Sub-Adviser as to which the Sub-Adviser exercises investment discretion.

         6.  Services to Other  Companies  or Accounts.  On  occasions  when the
Sub-Adviser  deems the purchase or sale of a security to be in the best interest
of the Fund as well as other clients,  the Sub-Adviser,  to the extent permitted
by applicable  laws and  regulations,  may, but shall be under no obligation to,
aggregate the  securities to be so purchased or sold in order to obtain the most
favorable price or lower brokerage commissions and efficient execution.  In such
event,  allocation  of the  securities  so  purchased  or  sold,  as well as the
expenses  incurred in the  transaction  will be made by the  Sub-Adviser  in the
manner it considers to be the most equitable. The Sub-Adviser agrees to allocate
similarly  opportunities  to sell or otherwise  dispose of securities  among the
Fund and other clients of the Sub-Adviser.

         7.  Other Sub-Advisers. The Sub-Adviser may from time to time enter
into investment  sub-advisory  agreements with one or more investment  advisers,
(an "Other Sub-Adviser"), to the Fund to perform some or all of the services for
which the Sub-Adviser is responsible  pursuant to this Agreement upon such terms
and  conditions  as the Adviser and the  Sub-Adviser  may  determine;  provided,
however,  that such investment  sub-advisory  agreements have been approved by a
majority  of the  Trustees  of the Trust who are not  interested  persons of the
Trust, or the Sub-Adviser or the Other  Sub-Adviser and by vote of a majority of
the outstanding voting securities of the Fund; and, provided,  further, that the
Sub-Adviser  shall  own a  majority  of  the  voting  securities  of  any  Other
Sub-Adviser. The Sub-Adviser may terminate the services of any Other Sub-Adviser
at any  time  in its  sole  discretion,  and  shall  at  such  time  assume  the
responsibilities  of such Other  Sub-Adviser  unless and until a successor Other
Sub-Adviser  is  selected.  The  Sub-Adviser  shall be  liable  for any error of
judgment or mistake of law by any Other  Sub-Adviser and for any act or omission
in the execution and management of the Fund by any Other Sub-Adviser.

         8.  Compensation of the Sub-Adviser. For the services to be rendered by
the Sub-Adviser  under this Agreement,  the Adviser shall pay to the Sub-Adviser
compensation, computed and paid monthly in arrears in U.S. dollars, at a rate of
0.80% of the average daily net asset value of the Fund's assets on an annualized
basis. If the Sub-Adviser  shall serve for less than the whole of any month, the
compensation  payable  to the  Sub-Adviser  with  respect  to the
<PAGE>
Fund  will be  prorated.  The  Sub-Adviser  will pay its  expenses  incurred  in
performing its duties under this Agreement. Neither the Trust nor the Fund shall
be liable to the Sub-Adviser for the  compensation of the  Sub-Adviser.  For the
purpose of determining fees payable to the Sub-Adviser,  the value of the Fund's
net assets  shall be  computed at the times and in the manner  specified  in the
Prospectus  and/or  Statement.  In  the  event  that  the  Adviser  reduces  its
management fee payable under the Advisory  Agreement in order to comply with the
expense  limitations  of a State  securities  commission or otherwise (but not a
voluntary  reduction),  the  Sub-Adviser  agrees to reduce its fee payable under
this Agreement by a pro rata amount.

         9.  Limitation of Liability of the Sub-Adviser. The Sub-Adviser shall
not 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 Fund,  except  for  willful  misfeasance,  bad faith or gross
negligence  in the  performance  of its duties and  obligations  hereunder.  The
Trust,  on behalf of the Fund, may enforce any  obligations  of the  Sub-Adviser
under this  Agreement  and may recover  directly  from the  Sub-Adviser  for any
liability it may have to the Fund.

         10. Activities of the Sub-Adviser.  The services of the Sub-Adviser to
the Fund are not deemed to be exclusive,  the  Sub-Adviser  being free to render
investment  advisory and/or other services to others. The Sub-Adviser may permit
other fund clients to use the words  "Foreign & Colonial"  in their  names.  The
Adviser  and the Trust  agree  that if the  Sub-Adviser  shall for any reason no
longer serve as the Sub-Adviser to the Fund, the Fund will change its name so as
to delete the words  "Foreign & Colonial".  It is understood  that the Trustees,
officers and shareholders of the Trust, the Fund or the Adviser are or may be or
become interested in the Sub-Adviser or any person controlling, controlled by or
under common control with the Sub-Adviser, as trustees,  officers,  employees or
otherwise and that  trustees,  officers and employees of the  Sub-Adviser or any
person  controlling,  controlled by or under common control with the Sub-Adviser
may become  similarly  interested in the Trust, the Fund or the Adviser and that
the  Sub-Adviser  may be or become  interested in the Fund as a  shareholder  or
otherwise.

         11. Covenants of the Sub-Adviser.  The Sub-Adviser  agrees that it (a)
will not deal with itself, "affiliated persons" of the Sub-Adviser, the Trustees
of the Trust or the  Fund's  distributor,  as  principals,  agents,  brokers  or
dealers in making  purchases or sales of  securities  or other  property for the
account  of the  Fund,  except  as  permitted  by the  1940  Act and the  rules,
regulations and orders  thereunder and subject to the prior written  approval of
the  Adviser,  (b) will not take a long or short  position  in the shares of the
Fund except as permitted by the  Declaration  and (c) will comply with all other
provisions of the  Declaration and the By-Laws and the  then-current  Prospectus
and Statement relative to the Sub-Adviser and its trustees,  officers, employees
and affiliates.

         12. Representations, Warranties and Additional Agreements of the
Sub-Adviser.  The Sub-Adviser represents, warrants and agrees that:

             (a) It: (i) is registered as an investment adviser under the U.S.
Investment Advisers Act of 1940 (the "Advisers Act"), is authorized to undertake
investment  business in the United  Kingdom by virtue of its  membership  in the
Investment Management  Regulatory  Organisation ("IMRO") and is registered under
the  laws of any  jurisdiction  in  which  the  Sub-Adviser  is  required  to be
registered as an investment  adviser in order to perform its  obligations  under
this  Agreement,  and  will  continue  to be so  registered  for so long as this
Agreement  remains  in  effect;  (ii) is not  prohibited  by the 1940 Act or the
Advisers Act from performing the services contemplated by this Agreement;  (iii)
has met,  and will  continue  to meet for so long as this  Agreement  remains in
effect,  any other applicable Federal or State  requirements,  or the applicable
requirements of any regulatory or industry  self-regulatory agency, necessary to
be met in order to perform the services contemplated by this Agreement; (iv) has
the  authority  to enter into and  perform  the  services  contemplated  by this
Agreement;  (v) will immediately notify the Adviser in writing of the occurrence
of any event that would disqualify the Sub-Adviser from serving as an investment
adviser of an  investment  company  pursuant to Section  9(a) of the 1940 Act or
otherwise; and (vi) will immediately notify the Adviser in writing of any change
of control of the Sub-Adviser or any parent of the  Sub-Adviser  resulting in an
"assignment" of this Agreement.

             (b) It will maintain, keep current and preserve on behalf of the
Fund,  in the manner and for the periods of time  required or  permitted  by the
1940 Act and the rules,  regulations and orders  thereunder and the Advisers Act
and the rules, regulations and orders thereunder, records relating to investment
transactions made by the Sub-Adviser for the Fund as may be reasonably requested
by the Adviser or the Fund from time to time. The  Sub-Adviser  agrees that such
records  are the  property  of the  Fund,  and will be  surrendered  to the Fund
promptly upon request;  provided however, that the Sub-Adviser may retain copies
of such records for archival purposes as required by IMRO.


             (c) The Sub-Adviser has adopted a written code of ethics complying
with the  requirements  of Rule  17j-1  under  the  1940 Act and,  if it has not
already done so, will provide the Adviser and the Trust with a copy of such code
of ethics, and upon any amendment to such code of ethics,  promptly provide such
amendment.  At least  annually  the  Sub-Adviser  will provide the Trust and the
Adviser with a certificate signed by the chief compliance officer (or the person
performing such function) of the Sub-Adviser  certifying,  to the best of his or
her  knowledge,  compliance  with  the code of  ethics  during  the  immediately
preceding  twelve (12) month  period,  including  any material  violations of or
amendments to the code of ethics or the administration thereof.

             (d) It has provided the Adviser and the Trust with a copy of its
Form ADV as most recently filed with the Securities and Exchange Commission (the
"SEC") and will,  promptly  after filing any  amendment to its Form ADV with the
SEC, furnish a copy of such amendment to the Adviser and the Trust.
<PAGE>
         13. Duration and  Termination of this  Agreement.  This Agreement shall
become  effective on the date first above written and shall govern the relations
between the parties hereto thereafter, and shall remain in force until August 1,
1997  and  each  year  thereafter  but  only  so  long  as  its  continuance  is
"specifically  approved at least  annually" (a) by the vote of a majority of the
Trustees  of the Trust who are not  "interested  persons" of the Trust or of the
Adviser or of the Sub-Adviser at a meeting  specifically  called for the purpose
of voting on such approval, and (b) by the Board of Trustees of the Trust, or by
"vote of a majority of the  outstanding  voting  securities"  of the Fund.  This
Agreement  may be  terminated  at any time without the payment of any penalty by
the  Trustees  of the Trust,  by "vote of a majority of the  outstanding  voting
securities" of the Fund or by the Adviser,  on not more than sixty days nor less
than thirty days written  notice,  or by the Sub-Adviser on not more than ninety
days nor less than sixty days written notice. This Agreement shall automatically
terminate  in the event of its  "assignment"  or in the event that the  Advisory
Agreement shall have terminated for any reason.

         14. Amendments to this Agreement.  This Agreement may be amended
only if such amendment is approved by "vote of a majority of the outstanding
voting securities" of the Fund, by the Adviser and by the Sub-Adviser.

         15. Certain  Definitions.  The terms  "specifically  approved at least
annually",   "vote  of  a  majority  of  the  outstanding  voting   securities",
"assignment", "control", "affiliated persons" and "interested person", when used
in this Agreement,  shall have the respective meanings  specified,  and shall be
construed in a manner  consistent with, the 1940 Act and the rules,  regulations
and orders thereunder, subject, however, to such exemptions as may be granted by
the SEC under the 1940 Act.

         16. Survival  of  Representations  and  Warranties;   Duty  to  Update
Information. All representations and warranties made by the Sub-Adviser pursuant
to Section 12 hereof shall  survive for the duration of this  Agreement  and the
Sub-Adviser  shall  immediately  notify,  but in no event  later  than  five (5)
business  days,  the  Adviser in  writing  upon  becoming  aware that any of the
foregoing representations and warranties are no longer true.

         17. Miscellaneous. This Agreement shall be governed by and construed in
accordance  with the internal laws of The  Commonwealth  of  Massachusetts.  All
notices  provided for by this Agreement  shall be in writing and shall be deemed
given when received, against appropriate receipt, by the Sub-Adviser's Secretary
in the case of the Sub-Adviser, the Adviser's General Counsel in the case of the
Adviser, and the Trust's Secretary in the case of the Fund, or such other person
as a party  shall  designate  by  notice to the other  parties.  This  Agreement
constitutes  the entire  agreement  among the parties  hereto and supersedes any
prior  agreement  among the parties  relating to the subject matter hereof.  The
section  headings of this Agreement are for  convenience of reference and do not
constitute a part hereof.
<PAGE>


         IN WITNESS  WHEREOF,  the  parties  have caused  this  Agreement  to be
executed and  delivered  in their names and on their behalf by the  undersigned,
thereunto duly authorized,  and their respective seals to be hereto affixed, all
as of the day and year first written above.

                                       MASSACHUSETTS FINANCIAL SERVICES COMPANY



                                       By:     JEFFREY L. SHAMES
                                               Jeffrey L. Shames
                                               President


                                       FOREIGN & COLONIAL MANAGEMENT LTD.



                                       By:     JAMES OGILVY
                                               James Ogilvy


                                       By:     JONATHAN LUBRAN
                                               Jonathan Lubran

The foregoing is hereby agreed to:


         A copy of the  Declaration  of Trust of the  Trust is on file  with the
Secretary of State of The  Commonwealth  of  Massachusetts.  The parties  hereto
acknowledge  that the  obligations of or arising out of this  instrument are not
binding  upon  any of the  Trust's  trustees,  officers,  employees,  agents  or
shareholders  individually,  but are binding solely upon the assets and property
of the Trust in accordance with its proportionate  interest  hereunder.  If this
instrument  is  executed  by the Trust on  behalf  of one or more  series of the
Trust,  the parties hereto  acknowledge  that the assets and liabilities of each
series of the Trust are separate and  distinct  and that the  obligations  of or
arising out of this instrument are binding solely upon the assets or property of
the series on whose behalf the Trust has executed this instrument.  If the Trust
has executed this instrument on behalf of more than one series of the Trust, the
parties hereto also agree that the obligations of each series hereunder shall be
several and not joint, in accordance with its proportionate  interest hereunder,
and  the  parties  hereto  agree  not to  proceed  against  any  series  for the
obligations of another series.


MFS SERIES TRUST X,
  on behalf of MFS/FOREIGN & COLONIAL INTERNATIONAL GROWTH FUND



By:  A. KEITH BRODKIN
     A. Keith Brodkin
     Chairman

<PAGE>
                                                          EXHIBIT NO. 99.5(g)


                             SUB-ADVISORY AGREEMENT


         SUB-ADVISORY AGREEMENT,  dated this 1st day of September,  1995, by and
between  MASSACHUSETTS  FINANCIAL SERVICES COMPANY, a Delaware  corporation (the
"Adviser") and FOREIGN & COLONIAL MANAGEMENT LTD., a company  incorporated under
the laws of England and Wales (the "Sub-Adviser").

                                  WITNESSETH:

         WHEREAS,  the Adviser  provides  MFS/Foreign  & Colonial  International
Growth  and  Income  Fund  (the  "Fund"),  a series of MFS  Series  Trust X (the
"Trust"), an open-end investment company registered under the Investment Company
Act of 1940,  as amended (the "1940  Act"),  business  services  pursuant to the
terms and conditions of an investment advisory agreement dated September 1, 1995
(the "Advisory  Agreement")  between the Adviser and the Trust, on behalf of the
Fund; and

         WHEREAS,  the Sub-Adviser is willing to provide services to the Adviser
on the terms and conditions hereinafter set forth.

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
of the parties  hereto as herein set forth,  the parties  covenant  and agree as
follows:

         1.  Duties  of  the  Sub-Adviser.  Subject  to the  supervision  of the
Trustees of the Trust and the Adviser,  the  Sub-Adviser  will:  (a) manage such
portion of the Fund's assets as the Adviser and the Sub-Adviser  shall from time
to time mutually  designate (the  "Designated  Assets") on behalf of the Fund in
accordance  with the Fund's  investment  objective,  policies and limitations as
stated in the Fund's then current Prospectus (the "Prospectus") and Statement of
Additional  Information (the "Statement"),  and the Trust's Amended and Restated
Declaration  of Trust dated  January 18, 1995 and Amended and Restated  By-Laws,
each as from  time to time in  effect  (respectively,  the"Declaration"  and the
"By-Laws") and in compliance  with the 1940 Act and the rules,  regulations  and
orders  thereunder;  (b) make investment  decisions for the Fund with respect to
the  Designated  Assets;  (c)  place  purchase  and sale  orders  for  portfolio
transactions  for the Fund with  respect to the  Designated  Assets;  (d) manage
otherwise  uninvested  cash  assets of the Fund with  respect to the  Designated
Assets ; (e) as the  agent  of the  Fund,  give  instructions  (including  trade
tickets) to the custodian and any  sub-custodian of the Fund as to deliveries of
securities,  transfers of currencies and payments of cash for the account of the
Fund with  respect to the  Designated  Assets (the  Sub-Adviser  shall  promptly
notify the  Adviser of such  instructions);  (f) employ  professional  portfolio
managers to provide research  services to the Fund; (g) attend periodic meetings
of the Board of  Trustees  of the Trust and (h)  obtain  all the  registrations,
qualifications and consents,  on behalf of the Fund, which are necessary for the
Fund to  purchase  and sell assets in each  jurisdiction  (other than the United
States) in which the Designated Assets are to be invested (the Sub-Adviser shall
promptly   provide   the  Adviser   with
<PAGE>
copies of any such  registrations,  qualifications  and consents).  In providing
these services,  the Sub-Adviser will furnish continuously an investment program
with respect to the Designated  Assets. The Sub-Adviser shall be responsible for
monitoring  the  Fund's  compliance  with the  Prospectus,  the  Statement,  the
Declaration,  the By-Laws and the 1940 Act and the rules, regulations and orders
thereunder and in monitoring such compliance the Sub-Adviser  shall do so in the
functional  currency of the Fund. The Sub-Adviser  shall only be responsible for
compliance  with the  above-mentioned  restrictions in regards to the Designated
Assets.  The Adviser agrees to provide the  Sub-Adviser  with such assistance as
may be reasonably requested by the Sub-Adviser in connection with its activities
under this Agreement, including, without limitation,  information concerning the
Fund, its funds available, or to become available,  for investment and generally
as to the conditions of the Fund's  affairs.  From time to time the Adviser will
notify the  Sub-Adviser  of the aggregate  U.S.  Dollar amount of the Designated
Assets. The Adviser will have  responsibility for exercising proxy,  consent and
other rights pertaining to the Fund's portfolio securities;  provided,  however,
that the Sub-Adviser will, as requested,  make recommendations to the Adviser as
to the manner in which such proxy, consent and other rights shall be exercised.


         Should the  Trustees  of the Trust or the  Adviser at any time make any
determination  as to  investment  policy and notify the  Sub-Adviser  thereof in
writing, the Sub-Adviser shall be bound by such determination for the period, if
any, specified in such notice or until notified that such determination has been
revoked. Further, the Adviser or the Trustees of the Trust may at any time, upon
written  notice  to the  Sub-Adviser,  suspend  or  restrict  the  right  of the
Sub-Adviser  to determine what assets of the Fund shall be purchased or sold and
what  portion,  if any, of the Fund's  assets  shall be held  uninvested.  It is
understood that the Adviser  undertakes to discuss with the Sub-Adviser any such
determinations  of investment policy and any such suspensions or restrictions on
the right of the  Sub-Adviser  to  determine  what  assets of the Fund  shall be
purchased or sold or held uninvested, prior to the implementation thereof.

         2.  Certain Information to the  Sub-Adviser.  Copies of the Prospectus,
the  Statement,  the  Declaration  and the By-Laws  have been  delivered  to the
Sub-Adviser.  The Adviser agrees to notify the Sub-Adviser of each change in the
investment policies of the Fund and to provide to the Sub-Adviser as promptly as
practicable  copies of all amendments and  supplements  to the  Prospectus,  the
Statement,  the  Declaration  and the  By-Laws.  In  addition,  the Adviser will
promptly  provide  the  Sub-Adviser  with  any  procedures   applicable  to  the
Sub-Adviser adopted from time to time by the Trustees of the Trust and agrees to
provide promptly to the Sub-Adviser copies of all amendments thereto.

         3.  Execution  of  Certain  Documents.  Subject  to any  other  written
instructions  of the Adviser and the Trustees of the Trust,  the  Sub-Adviser is
hereby  appointed the Adviser's  and the Trust's agent and  attorney-in-fact  to
execute account documentation,  agreements, contracts and other documents as the
Sub-Adviser  shall be requested by brokers,  dealers,  counterparties  and other
persons in connection with its management of the Designated Assets.

         4.  Reports. The Sub-Adviser shall furnish to the Trustees of the Trust
or the  Adviser,  or  both,  as may be  appropriate,  quarterly  reports  of its
activities on behalf of the Fund,
<PAGE>

as required by applicable law or as otherwise requested from time to time by the
Trustees of the Trust or the Adviser, and such additional information,  reports,
evaluations,  analyses and opinions as the Trustees of the Trust or the Adviser,
as appropriate, may request from time to time.

         5.  Brokerage. In connection with the selections of brokers, dealers or
other  entities and the placing of orders for the purchase and sale of portfolio
investments for the Fund with respect to the Designated  Assets, the Sub-Adviser
is  directed  to seek for the Fund  execution  at the  most  favorable  price by
responsible  brokerage  firms at reasonably  competitive  commission  rates.  In
fulfilling this  requirement,  the Sub-Adviser shall not be deemed to have acted
unlawfully or to have breached any duty, created by this Agreement or otherwise,
solely by reason of its having caused the Fund to pay a broker,  dealer or other
entity an amount of commission for effecting a securities  transaction in excess
of the amount of commission  another  broker,  dealer or other entity would have
charged for effecting that  transaction,  if the Sub-Adviser  determined in good
faith that such amount of commission  was reasonable in relation to the value of
the brokerage and research  services (within the meaning of Section 28(e) of the
Securities Exchange Act of 1934, as amended) provided by such broker,  dealer or
other  entity,  viewed in terms of either  that  particular  transaction  or the
Sub-Adviser's  overall  responsibilities  with  respect to the Fund and to other
clients of the  Sub-Adviser  as to which the  Sub-Adviser  exercises  investment
discretion.

         6.  Services to Other  Companies  or Accounts.  On  occasions  when the
Sub-Adviser  deems the purchase or sale of a security to be in the best interest
of the Fund as well as other clients,  the Sub-Adviser,  to the extent permitted
by applicable  laws and  regulations,  may, but shall be under no obligation to,
aggregate the  securities to be so purchased or sold in order to obtain the most
favorable price or lower brokerage commissions and efficient execution.  In such
event,  allocation  of the  securities  so  purchased  or  sold,  as well as the
expenses  incurred in the  transaction  will be made by the  Sub-Adviser  in the
manner it considers to be the most equitable. The Sub-Adviser agrees to allocate
similarly  opportunities  to sell or otherwise  dispose of securities  among the
Fund and other clients of the Sub-Adviser.

         7.  Other Sub-Advisers. The Sub-Adviser may from time to time enter
into investment sub-advisory agreements with one or more investment advisers (an
"Other  Sub-Adviser")  to the Fund to perform  some or all of the  services  for
which the Sub-Adviser is responsible  pursuant to this Agreement upon such terms
and  conditions  as the Adviser and the  Sub-Adviser  may  determine;  provided,
however,  that such investment  sub-advisory  agreements have been approved by a
majority  of the  Trustees  of the Trust who are not  interested  persons of the
Trust, or the Sub-Adviser or the Other  Sub-Adviser and by vote of a majority of
the outstanding voting securities of the Fund; and, provided,  further, that the
Sub-Adviser  shall  own a  majority  of  the  voting  securities  of  any  Other
Sub-Adviser. The Sub-Adviser may terminate the services of any Other Sub-Adviser
at any  time  in its  sole  discretion,  and  shall  at  such  time  assume  the
responsibilities  of such Other  Sub-Adviser  unless and until a successor Other
Sub-Adviser  is  selected.  The  Sub-Adviser  shall be  liable  for any error of
judgment or mistake of law by any Other  Sub-Adviser and for any act or omission
in the execution and management of the Fund by any Other Sub-Adviser.
<PAGE>

         8.  Compensation of the Sub-Adviser. For the services to be rendered by
the Sub-Adviser  under this Agreement,  the Adviser shall pay to the Sub-Adviser
compensation, computed and paid monthly in arrears in U.S. dollars, at a rate of
0.75% of the  average  daily  net  asset  value of the  Designated  Assets on an
annualized  basis. If the Sub-Adviser shall serve for less than the whole of any
month, the compensation payable to the Sub-Adviser with respect to the Fund will
be prorated.  The Sub-Adviser  will pay its expenses  incurred in performing its
duties under this  Agreement.  Neither the Trust nor the Fund shall be liable to
the Sub-Adviser  for the  compensation  of the  Sub-Adviser.  For the purpose of
determining fees payable to the Sub-Adviser,  the value of the Fund's net assets
shall be computed  at the times and in the manner  specified  in the  Prospectus
and/or  Statement.  In the event that the  Adviser  reduces its  management  fee
payable  under  the  Advisory  Agreement  in order to  comply  with the  expense
limitations of a State  securities  commission or otherwise (but not a voluntary
reduction),  the  Sub-Adviser  agrees  to  reduce  its fee  payable  under  this
Agreement by a pro rata amount.

         9.  Limitation of Liability of the  Sub-Adviser. The Sub-Adviser shall
not 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 Fund,  except  for  willful  misfeasance,  bad faith or gross
negligence  in the  performance  of its duties and  obligations  hereunder.  The
Trust,  on behalf of the Fund, may enforce any  obligations  of the  Sub-Adviser
under this  Agreement  and may recover  directly  from the  Sub-Adviser  for any
liability it may have to the Fund.

         10. Activities of the Sub-Adviser.  The services of the Sub-Adviser to
the Fund are not deemed to be exclusive,  the  Sub-Adviser  being free to render
investment  advisory and/or other services to others. The Sub-Adviser may permit
other fund clients to use the words  "Foreign & Colonial"  in their  names.  The
Adviser  and the Trust  agree  that if the  Sub-Adviser  shall for any reason no
longer serve as the Sub-Adviser to the Fund, the Fund will change its name so as
to delete the words  "Foreign & Colonial".  It is understood  that the Trustees,
officers and shareholders of the Trust, the Fund or the Adviser are or may be or
become interested in the Sub-Adviser or any person controlling, controlled by or
under common control with the Sub-Adviser, as trustees,  officers,  employees or
otherwise and that  trustees,  officers and employees of the  Sub-Adviser or any
person  controlling,  controlled by or under common control with the Sub-Adviser
may become  similarly  interested in the Trust, the Fund or the Adviser and that
the  Sub-Adviser  may be or become  interested in the Fund as a  shareholder  or
otherwise.

         11. Covenants of the Sub-Adviser.  The Sub-Adviser  agrees that it (a)
will not deal with itself, "affiliated persons" of the Sub-Adviser, the Trustees
of the Trust or the  Fund's  distributor,  as  principals,  agents,  brokers  or
dealers in making  purchases or sales of  securities  or other  property for the
account  of the  Fund,  except  as  permitted  by the  1940  Act and the  rules,
regulations and orders  thereunder and subject to the prior written  approval of
the  Adviser,  (b) will not take a long or short  position  in the shares of the
Fund except as permitted by the  Declaration  and (c) will comply with all other
provisions of the  Declaration and the By-Laws and the  then-current  Prospectus
and Statement relative to the Sub-Adviser and its trustees,  officers, employees
and affiliates.
<PAGE>

         12. Representations, Warranties and Additional Agreements of the
Sub-Adviser.  The Sub-Adviser represents, warrants and agrees that:

             (a)  It: (i) is registered as an investment adviser under the U.S.
Investment Advisers Act of 1940 (the "Advisers Act"), is authorized to undertake
investment  business in the United  Kingdom by virtue of its  membership  in the
Investment Management  Regulatory  Organisation ("IMRO") and is registered under
the  laws of any  jurisdiction  in  which  the  Sub-Adviser  is  required  to be
registered as an investment  adviser in order to perform its  obligations  under
this  Agreement,  and  will  continue  to be so  registered  for so long as this
Agreement  remains  in  effect;  (ii) is not  prohibited  by the 1940 Act or the
Advisers Act from performing the services contemplated by this Agreement;  (iii)
has met,  and will  continue  to meet for so long as this  Agreement  remains in
effect,  any other applicable Federal or State  requirements,  or the applicable
requirements of any regulatory or industry  self-regulatory agency, necessary to
be met in order to perform the services contemplated by this Agreement; (iv) has
the  authority  to enter into and  perform  the  services  contemplated  by this
Agreement;  (v) will immediately notify the Adviser in writing of the occurrence
of any event that would disqualify the Sub-Adviser from serving as an investment
adviser of an  investment  company  pursuant to Section  9(a) of the 1940 Act or
otherwise; and (vi) will immediately notify the Adviser in writing of any change
of control of the Sub-Adviser or any parent of the  Sub-Adviser  resulting in an
"assignment" of this Agreement.

             (b)  It will maintain, keep current and preserve on behalf of the
Fund,  in the manner and for the periods of time  required or  permitted  by the
1940 Act and the rules,  regulations and orders  thereunder and the Advisers Act
and the rules, regulations and orders thereunder, records relating to investment
transactions made by the Sub-Adviser for the Fund as may be reasonably requested
by the Adviser or the Fund from time to time. The  Sub-Adviser  agrees that such
records  are the  property  of the  Fund,  and will be  surrendered  to the Fund
promptly upon request; provided, however, that the Sub-Adviser may retain copies
of such records for archival purposes as required by IMRO.

             (c)  The Sub-Adviser has adopted a written code of ethics complying
with the  requirements  of Rule  17j-1  under  the  1940 Act and,  if it has not
already done so, will provide the Adviser and the Trust with a copy of such code
of ethics, and upon any amendment to such code of ethics,  promptly provide such
amendment.  At least  annually  the  Sub-Adviser  will provide the Trust and the
Adviser with a certificate signed by the chief compliance officer (or the person
performing such function) of the Sub-Adviser  certifying,  to the best of his or
her  knowledge,  compliance  with  the code of  ethics  during  the  immediately
preceding  twelve (12) month  period,  including  any material  violations of or
amendments to the code of ethics or the administration thereof.
<PAGE>

             (d)  It has provided the Adviser and the Trust with a copy of its
Form ADV as most recently filed with the Securities and Exchange Commission (the
"SEC") and will,  promptly  after filing any  amendment to its Form ADV with the
SEC, furnish a copy of such amendment to the Adviser and the Trust.

         13. Duration and  Termination of this  Agreement.  This Agreement shall
become  effective on the date first above written and shall govern the relations
between the parties hereto thereafter, and shall remain in force until August 1,
1997  and  each  year  thereafter  but  only  so  long  as  its  continuance  is
"specifically  approved at least  annually" (a) by the vote of a majority of the
Trustees  of the Trust who are not  "interested  persons" of the Trust or of the
Adviser or of the Sub-Adviser at a meeting  specifically  called for the purpose
of voting on such approval, and (b) by the Board of Trustees of the Trust, or by
"vote of a majority of the  outstanding  voting  securities"  of the Fund.  This
Agreement  may be  terminated  at any time without the payment of any penalty by
the  Trustees  of the Trust,  by "vote of a majority of the  outstanding  voting
securities" of the Fund or by the Adviser,  on not more than sixty days nor less
than thirty days written  notice,  or by the Sub-Adviser on not more than ninety
days nor less than sixty days written notice. This Agreement shall automatically
terminate  in the event of its  "assignment"  or in the event that the  Advisory
Agreement shall have terminated for any reason.

         14. Amendments to this Agreement.  This Agreement may be amended only
if such amendment is approved by "vote of a majority of the  outstanding  voting
securities" of the Fund, by the Adviser and by the Sub-Adviser.

         15. Certain  Definitions.  The terms  "specifically  approved at least
annually",   "vote  of  a  majority  of  the  outstanding  voting   securities",
"assignment", "control", "affiliated persons" and "interested person", when used
in this Agreement,  shall have the respective meanings  specified,  and shall be
construed in a manner  consistent with, the 1940 Act and the rules,  regulations
and orders thereunder, subject, however, to such exemptions as may be granted by
the SEC under the 1940 Act.

         16. Survival  of  Representations  and  Warranties;   Duty  to  Update
Information. All representations and warranties made by the Sub-Adviser pursuant
to Section 12 hereof shall  survive for the duration of this  Agreement  and the
Sub-Adviser  shall  immediately  notify,  but in no event  later  than  five (5)
business  days,  the  Adviser in  writing  upon  becoming  aware that any of the
foregoing representations and warranties are no longer true.


         17. Miscellaneous. This Agreement shall be governed by and construed in
accordance  with the internal laws of The  Commonwealth  of  Massachusetts.  All
notices  provided for by this Agreement  shall be in writing and shall be deemed
given when received, against appropriate receipt, by the Sub-Adviser's Secretary
in the case of the Sub-Adviser, the Adviser's General Counsel in the case of the
Adviser, and the Trust's Secretary in the case of the Fund, or such other person
as a party  shall  designate  by  notice to the other  parties.  This  Agreement
constitutes  the entire  agreement  among the parties  hereto and supersedes any
prior  agreement  among the parties  relating to the subject matter hereof.  The
section  headings of this Agreement are for  convenience of reference and do not
constitute a part hereof.
<PAGE>

         IN WITNESS  WHEREOF,  the  parties  have caused  this  Agreement  to be
executed and  delivered  in their names and on their behalf by the  undersigned,
thereunto duly authorized,  and their respective seals to be hereto affixed, all
as of the day and year first written above.

                                       MASSACHUSETTS FINANCIAL SERVICES COMPANY


                                       By:     JEFFREY L. SHAMES
                                               Jeffrey L. Shames
                                               President


                                       FOREIGN & COLONIAL MANAGEMENT LTD.


                                       By:     JAMES OGILVY
                                               James Ogilvy


                                       By:     JONATHAN LUBRAN
                                               Jonathan Lubran
The foregoing is hereby agreed to:

         A copy of the  Declaration  of Trust of the  Trust is on file  with the
Secretary of State of The  Commonwealth  of  Massachusetts.  The parties  hereto
acknowledge  that the  obligations of or arising out of this  instrument are not
binding  upon  any of the  Trust's  trustees,  officers,  employees,  agents  or
shareholders  individually,  but are binding solely upon the assets and property
of the Trust in accordance with its proportionate  interest  hereunder.  If this
instrument  is  executed  by the Trust on  behalf  of one or more  series of the
Trust,  the parties hereto  acknowledge  that the assets and liabilities of each
series of the Trust are separate and  distinct  and that the  obligations  of or
arising out of this instrument are binding solely upon the assets or property of
the series on whose behalf the Trust has executed this instrument.  If the Trust
has executed this instrument on behalf of more than one series of the Trust, the
parties hereto also agree that the obligations of each series hereunder shall be
several and not joint, in accordance with its proportionate  interest hereunder,
and  the  parties  hereto  agree  not to  proceed  against  any  series  for the
obligations of another series.

MFS SERIES TRUST X,
  on behalf of MFS/FOREIGN & COLONIAL INTERNATIONAL GROWTH AND INCOME FUND


By:  A. KEITH BRODKIN
     A. Keith Brodkin
     Chairman

<PAGE>
                                                           EXHIBIT NO. 99.5(h)


                             SUB-ADVISORY AGREEMENT


         SUB-ADVISORY AGREEMENT,  dated this 1st day of September,  1995, by and
between  MASSACHUSETTS  FINANCIAL SERVICES COMPANY, a Delaware  corporation (the
"Adviser") and FOREIGN & COLONIAL MANAGEMENT LTD., a company  incorporated under
the laws of England and Wales (the "Sub-Adviser").

                                  WITNESSETH:

         WHEREAS,  the Adviser provides  MFS/Foreign & Colonial Emerging Markets
Equity  Fund (the  "Fund"),  a series of MFS Series  Trust X (the  "Trust"),  an
open-end investment company registered under the Investment Company Act of 1940,
as  amended  (the  "1940  Act"),  business  services  pursuant  to the terms and
conditions  of an investment  advisory  agreement  dated  September 1, 1995 (the
"Advisory  Agreement") between the Adviser and the Trust, on behalf of the Fund;
and

         WHEREAS,  the Sub-Adviser is willing to provide services to the Adviser
on the terms and conditions hereinafter set forth.

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
of the parties  hereto as herein set forth,  the parties  covenant  and agree as
follows:

         1.  Duties  of  the  Sub-Adviser.  Subject  to the  supervision  of the
Trustees of the Trust and the Adviser,  the  Sub-Adviser  will:  (a) manage such
Fund's  assets on behalf of the Fund in  accordance  with the Fund's  investment
objective,  policies  and  limitations  as stated  in the  Fund's  then  current
Prospectus  (the  "Prospectus")  and  Statement of Additional  Information  (the
"Statement"),  and the Trust's  Amended and Restated  Declaration of Trust dated
January 18, 1995 and Amended and Restated By-Laws,  each as from time to time in
effect  (respectively,  the  "Declaration"  and the "By-Laws") and in compliance
with the 1940 Act and the rules,  regulations  and orders  thereunder;  (b) make
investment  decisions  for the Fund;  (c) place  purchase  and sale  orders  for
portfolio transactions for the Fund; (d) manage otherwise uninvested cash assets
of the Fund; (e) as the agent of the Fund, give  instructions  (including  trade
tickets) to the custodian and any  sub-custodian of the Fund as to deliveries of
securities,  transfers of currencies and payments of cash for the account of the
Fund (the Sub-Adviser  shall promptly notify the Adviser of such  instructions);
(f) employ  professional  portfolio managers to provide research services to the
Fund; (g) attend periodic meetings of the Board of Trustees of the Trust and (h)
obtain all the  registrations,  qualifications  and  consents,  on behalf of the
Fund,  which are  necessary  for the Fund to  purchase  and sell  assets in each
jurisdiction (other than the United States) in which the Fund's assets are to be
invested (the Sub-Adviser  shall promptly provide the Adviser with copies of any
such registrations,  qualifications and consents).  In providing these services,
the Sub-Adviser will furnish  continuously an investment program with respect to
the Fund's  assets.  The  Sub-Adviser  shall be  responsible  for monitoring the
Fund's  compliance  with
<PAGE>

the Prospectus, the Statement, the Declaration, the By-Laws and the 1940 Act and
the rules,  regulations and orders  thereunder and in monitoring such compliance
the Sub-Adviser shall do so in the functional  currency of the Fund. The Adviser
agrees to provide the  Sub-Adviser  with such  assistance  as may be  reasonably
requested  by the  Sub-Adviser  in  connection  with its  activities  under this
Agreement,  including, without limitation,  information concerning the Fund, its
funds available, or to become available,  for investment and generally as to the
conditions of the Fund's affairs.  From time to time the Adviser will notify the
Sub-Adviser  of the  aggregate  U.S.  Dollar  amount of the Fund's  assets.  The
Adviser will have responsibility for exercising proxy,  consent and other rights
pertaining  to the Fund's  portfolio  securities;  provided,  however,  that the
Sub-Adviser will, as requested,  make  recommendations  to the Adviser as to the
manner in which such proxy, consent and other rights shall be exercised.

         Should the  Trustees  of the Trust or the  Adviser at any time make any
determination  as to  investment  policy and notify the  Sub-Adviser  thereof in
writing, the Sub-Adviser shall be bound by such determination for the period, if
any, specified in such notice or until notified that such determination has been
revoked. Further, the Adviser or the Trustees of the Trust may at any time, upon
written  notice  to the  Sub-Adviser,  suspend  or  restrict  the  right  of the
Sub-Adviser  to determine what assets of the Fund shall be purchased or sold and
what  portion,  if any, of the Fund's  assets  shall be held  uninvested.  It is
understood that the Adviser  undertakes to discuss with the Sub-Adviser any such
determinations  of investment  policy and any such suspension or restrictions on
the right of the  Sub-Adviser  to  determine  what  assets of the Fund  shall be
purchased or sold or held uninvested, prior to the implementation thereof.

         2.  Certain Information to the  Sub-Adviser.  Copies of the Prospectus,
the  Statement,  the  Declaration  and the By-Laws  have been  delivered  to the
Sub-Adviser.  The Adviser agrees to notify the Sub-Adviser of each change in the
investment policies of the Fund and to provide to the Sub-Adviser as promptly as
practicable  copies of all amendments and  supplements  to the  Prospectus,  the
Statement,  the  Declaration  and the  By-Laws.  In  addition,  the Adviser will
promptly  provide  the  Sub-Adviser  with  any  procedures   applicable  to  the
Sub-Adviser adopted from time to time by the Trustees of the Trust and agrees to
provide promptly to the Sub-Adviser copies of all amendments thereto.

         3.  Execution of  Certain  Documents.  Subject  to any  other  written
instructions  of the Adviser and the Trustees of the Trust,  the  Sub-Adviser is
hereby  appointed the Adviser's  and the Trust's agent and  attorney-in-fact  to
execute account documentation,  agreements, contracts and other documents as the
Sub-Adviser  shall be requested by brokers,  dealers,  counterparties  and other
persons in connection with its management of the assets of the Fund.

         4.  Reports. The Sub-Adviser shall furnish to the Trustees of the Trust
or the  Adviser,  or  both,  as may be  appropriate,  quarterly  reports  of its
activities on behalf of the Fund, as required by applicable  law or as otherwise
requested  from time to time by the  Trustees of the Trust or the  Adviser,  and
such additional information,  reports, evaluations, analyses and opinions as the
Trustees of the Trust or the Adviser,  as appropriate,  may request from time to
time.
<PAGE>

         5.  Brokerage. In connection with the selections of brokers, dealers or
other  entities and the placing of orders for the purchase and sale of portfolio
investments  for the Fund,  the  Sub-Adviser  is  directed  to seek for the Fund
execution  at the  most  favorable  price  by  responsible  brokerage  firms  at
reasonably  competitive  commission rates. In fulfilling this  requirement,  the
Sub-Adviser shall not be deemed to have acted unlawfully or to have breached any
duty,  created by this  Agreement or  otherwise,  solely by reason of its having
caused the Fund to pay a broker,  dealer or other entity an amount of commission
for  effecting a securities  transaction  in excess of the amount of  commission
another  broker,  dealer or other entity would have charged for  effecting  that
transaction,  if the  Sub-Adviser  determined  in good faith that such amount of
commission was reasonable in relation to the value of the brokerage and research
services (within the meaning of Section 28(e) of the Securities  Exchange Act of
1934, as amended)  provided by such broker,  dealer or other  entity,  viewed in
terms  of  either  that  particular  transaction  or the  Sub-Adviser's  overall
responsibilities  with  respect  to  the  Fund  and  to  other  clients  of  the
Sub-Adviser as to which the Sub-Adviser exercises investment discretion.

         6.  Services to Other  Companies  or Accounts.  On  occasions  when the
Sub-Adviser  deems the purchase or sale of a security to be in the best interest
of the Fund as well as other clients,  the Sub-Adviser,  to the extent permitted
by applicable  laws and  regulations,  may, but shall be under no obligation to,
aggregate the  securities to be so purchased or sold in order to obtain the most
favorable price or lower brokerage commissions and efficient execution.  In such
event,  allocation  of the  securities  so  purchased  or  sold,  as well as the
expenses  incurred in the  transaction  will be made by the  Sub-Adviser  in the
manner it considers to be the most equitable. The Sub-Adviser agrees to allocate
similarly  opportunities  to sell or otherwise  dispose of securities  among the
Fund and other clients of the Sub-Adviser.

         7.  Other Sub-Advisers. The Sub-Adviser may from time to time enter
into investment  sub-advisory  agreements with one or more investment  advisers,
(an "Other Sub-Adviser"), to the Fund to perform some or all of the services for
which the Sub-Adviser is responsible  pursuant to this Agreement upon such terms
and  conditions  as the Adviser and the  Sub-Adviser  may  determine;  provided,
however,  that such investment  sub-advisory  agreements have been approved by a
majority  of the  Trustees  of the Trust who are not  interested  persons of the
Trust, or the Sub-Adviser or the Other  Sub-Adviser and by vote of a majority of
the outstanding voting securities of the Fund; and, provided,  further, that the
Sub-Adviser  shall  own a  majority  of  the  voting  securities  of  any  Other
Sub-Adviser. The Sub-Adviser may terminate the services of any Other Sub-Adviser
at any  time  in its  sole  discretion,  and  shall  at  such  time  assume  the
responsibilities  of such Other  Sub-Adviser  unless and until a successor Other
Sub-Adviser  is  selected.  The  Sub-Adviser  shall be  liable  for any error of
judgment or mistake of law by any Other  Sub-Adviser and for any act or omission
in the execution and management of the Fund by any Other Sub-Adviser.

         8.  Compensation of the Sub-Adviser. For the services to be rendered by
the Sub-Adviser  under this Agreement,  the Adviser shall pay to the Sub-Adviser
compensation, computed and paid monthly in arrears in U.S. dollars, at a rate of
1.00% of the average daily net asset value of the Fund's assets on an annualized
basis. If the Sub-Adviser  shall serve for less than the whole of any month, the
compensation  payable  to the  Sub-Adviser  with  respect  to the
<PAGE>

Fund  will be  prorated.  The  Sub-Adviser  will pay its  expenses  incurred  in
performing its duties under this Agreement. Neither the Trust nor the Fund shall
be liable to the Sub-Adviser for the  compensation of the  Sub-Adviser.  For the
purpose of determining fees payable to the Sub-Adviser,  the value of the Fund's
net assets  shall be  computed at the times and in the manner  specified  in the
Prospectus  and/or  Statement.  In  the  event  that  the  Adviser  reduces  its
management fee payable under the Advisory  Agreement in order to comply with the
expense  limitations  of a State  securities  commission or otherwise (but not a
voluntary  reduction),  the  Sub-Adviser  agrees to reduce its fee payable under
this Agreement by a pro rata amount.

         9.  Limitation of Liability of the Sub-Adviser.  The Sub-Adviser  shall
not 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 Fund,  except  for  willful  misfeasance,  bad faith or gross
negligence  in the  performance  of its duties and  obligations  hereunder.  The
Trust,  on behalf of the Fund, may enforce any  obligations  of the  Sub-Adviser
under this  Agreement  and may recover  directly  from the  Sub-Adviser  for any
liability it may have to the Fund.

         10.  Activities of the Sub-Adviser.  The services of the Sub-Adviser to
the Fund are not deemed to be exclusive,  the  Sub-Adviser  being free to render
investment  advisory and/or other services to others. The Sub-Adviser may permit
other fund clients to use the words  "Foreign & Colonial"  in their  names.  The
Adviser  and the Trust  agree  that if the  Sub-Adviser  shall for any reason no
longer serve as the Sub-Adviser to the Fund, the Fund will change its name so as
to delete the words  "Foreign & Colonial".  It is understood  that the Trustees,
officers and shareholders of the Trust, the Fund or the Adviser are or may be or
become interested in the Sub-Adviser or any person controlling, controlled by or
under common control with the Sub-Adviser, as trustees,  officers,  employees or
otherwise and that  trustees,  officers and employees of the  Sub-Adviser or any
person  controlling,  controlled by or under common control with the Sub-Adviser
may become  similarly  interested in the Trust, the Fund or the Adviser and that
the  Sub-Adviser  may be or become  interested in the Fund as a  shareholder  or
otherwise.

         11.  Covenants of the Sub-Adviser.  The Sub-Adviser  agrees that it (a)
will not deal with itself, "affiliated persons" of the Sub-Adviser, the Trustees
of the Trust or the  Fund's  distributor,  as  principals,  agents,  brokers  or
dealers in making  purchases or sales of  securities  or other  property for the
account  of the  Fund,  except  as  permitted  by the  1940  Act and the  rules,
regulations and orders  thereunder and subject to the prior written  approval of
the  Adviser,  (b) will not take a long or short  position  in the shares of the
Fund except as permitted by the  Declaration  and (c) will comply with all other
provisions of the  Declaration and the By-Laws and the  then-current  Prospectus
and Statement relative to the Sub-Adviser and its trustees,  officers, employees
and affiliates.

         12.  Representations, Warranties and Additional Agreements of the
Sub-Adviser.  The Sub-Adviser represents, warrants and agrees that:

             (a)  It: (i) is registered as an investment adviser under the U.S.
Investment Advisers Act of 1940 (the "Advisers Act"), is authorized to undertake
investment  business in the
<PAGE>
United  Kingdom  by  virtue  of  its  membership  in the  Investment  Management
Regulatory  Organisation  ("IMRO")  and is  registered  under  the  laws  of any
jurisdiction  in which  the  Sub-Adviser  is  required  to be  registered  as an
investment adviser in order to perform its obligations under this Agreement, and
will  continue  to be so  registered  for so long as this  Agreement  remains in
effect;  (ii)  is not  prohibited  by the  1940  Act or the  Advisers  Act  from
performing the services contemplated by this Agreement;  (iii) has met, and will
continue  to meet for so long as this  Agreement  remains in  effect,  any other
applicable Federal or State requirements,  or the applicable requirements of any
regulatory or industry  self-regulatory agency,  necessary to be met in order to
perform the services  contemplated by this Agreement;  (iv) has the authority to
enter into and perform the services  contemplated  by this  Agreement;  (v) will
immediately  notify the Adviser in writing of the  occurrence  of any event that
would  disqualify the  Sub-Adviser  from serving as an investment  adviser of an
investment  company  pursuant to Section 9(a) of the 1940 Act or otherwise;  and
(vi) will immediately  notify the Adviser in writing of any change of control of
the Sub-Adviser or any parent of the Sub-Adviser resulting in an "assignment" of
this Agreement.

             (b)  It will maintain, keep current and preserve on behalf of the
Fund,  in the manner and for the periods of time  required or  permitted  by the
1940 Act and the rules,  regulations and orders  thereunder and the Advisers Act
and the rules, regulations and orders thereunder, records relating to investment
transactions made by the Sub-Adviser for the Fund as may be reasonably requested
by the Adviser or the Fund from time to time. The  Sub-Adviser  agrees that such
records  are the  property  of the  Fund,  and will be  surrendered  to the Fund
promptly upon request; provided, however, that the Sub-Adviser may retain copies
of such records for archival purposes as required by IMRO.

             (c)  The Sub-Adviser has adopted a written code of ethics complying
with the  requirements  of Rule  17j-1  under  the  1940 Act and,  if it has not
already done so, will provide the Adviser and the Trust with a copy of such code
of ethics, and upon any amendment to such code of ethics,  promptly provide such
amendment.  At least  annually  the  Sub-Adviser  will provide the Trust and the
Adviser with a certificate signed by the chief compliance officer (or the person
performing such function) of the Sub-Adviser  certifying,  to the best of his or
her  knowledge,  compliance  with  the code of  ethics  during  the  immediately
preceding  twelve (12) month  period,  including  any material  violations of or
amendments to the code of ethics or the administration thereof.

             (d)  It has provided the Adviser and the Trust with a copy of its
Form ADV as most recently filed with the Securities and Exchange Commission (the
"SEC") and will,  promptly  after filing any  amendment to its Form ADV with the
SEC, furnish a copy of such amendment to the Adviser and the Trust.
<PAGE>

         13. Duration and  Termination of this  Agreement.  This Agreement shall
become  effective on the date first above written and shall govern the relations
between the parties hereto thereafter, and shall remain in force until August 1,
1997  and  each  year  thereafter  but  only  so  long  as  its  continuance  is
"specifically  approved at least  annually" (a) by the vote of a majority of the
Trustees  of the Trust who are not  "interested  persons" of the Trust or of the
Adviser or of the Sub-Adviser at a meeting  specifically  called for the purpose
of voting on such approval, and (b) by the Board of Trustees of the Trust, or by
"vote of a majority of the  outstanding  voting  securities"  of the Fund.  This
Agreement  may be  terminated  at any time without the payment of any penalty by
the  Trustees  of the Trust,  by "vote of a majority of the  outstanding  voting
securities" of the Fund or by the Adviser,  on not more than sixty days nor less
than thirty days written  notice,  or by the Sub-Adviser on not more than ninety
days nor less than sixty days written notice. This Agreement shall automatically
terminate  in the event of its  "assignment"  or in the event that the  Advisory
Agreement shall have terminated for any reason.

         14. Amendments to this Agreement.  This Agreement may be amended
only if such amendment is approved by "vote of a majority of the outstanding
voting securities" of the Fund, by the Adviser and by the Sub-Adviser.

         15. Certain  Definitions.  The terms  "specifically  approved at least
annually",   "vote  of  a  majority  of  the  outstanding  voting   securities",
"assignment", "control", "affiliated persons" and "interested person", when used
in this Agreement,  shall have the respective meanings  specified,  and shall be
construed in a manner  consistent with, the 1940 Act and the rules,  regulations
and orders thereunder, subject, however, to such exemptions as may be granted by
the SEC under the 1940 Act.

         16. Survival  of  Representations  and  Warranties;   Duty  to  Update
Information. All representations and warranties made by the Sub-Adviser pursuant
to Section 12 hereof shall  survive for the duration of this  Agreement  and the
Sub-Adviser  shall  immediately  notify,  but in no event  later  than  five (5)
business  days,  the  Adviser in  writing  upon  becoming  aware that any of the
foregoing representations and warranties are no longer true.

         17. Miscellaneous. This Agreement shall be governed by and construed in
accordance  with the internal laws of The  Commonwealth  of  Massachusetts.  All
notices  provided for by this Agreement  shall be in writing and shall be deemed
given when received, against appropriate receipt, by the Sub-Adviser's Secretary
in the case of the Sub-Adviser, the Adviser's General Counsel in the case of the
Adviser, and the Trust's Secretary in the case of the Fund, or such other person
as a party  shall  designate  by  notice to the other  parties.  This  Agreement
constitutes  the entire  agreement  among the parties  hereto and supersedes any
prior  agreement  among the parties  relating to the subject matter hereof.  The
section  headings of this Agreement are for  convenience of reference and do not
constitute a part hereof.
<PAGE>

         IN WITNESS  WHEREOF,  the  parties  have caused  this  Agreement  to be
executed and  delivered  in their names and on their behalf by the  undersigned,
thereunto duly authorized,  and their respective seals to be hereto affixed, all
as of the day and year first written above.

                                       MASSACHUSETTS FINANCIAL SERVICES COMPANY


                                       By:     JEFFREY L. SHAMES
                                               Jeffrey L. Shames
                                               President


                                       FOREIGN & COLONIAL MANAGEMENT LTD.



                                       By:     JAMES OGILVY
                                               James Ogilvy


                                       By:     JONATHAN LUBRAN
                                               Jonathan Lubran

The foregoing is hereby agreed to:

         A copy of the  Declaration  of Trust of the  Trust is on file  with the
Secretary of State of The  Commonwealth  of  Massachusetts.  The parties  hereto
acknowledge  that the  obligations of or arising out of this  instrument are not
binding  upon  any of the  Trust's  trustees,  officers,  employees,  agents  or
shareholders  individually,  but are binding solely upon the assets and property
of the Trust in accordance with its proportionate  interest  hereunder.  If this
instrument  is  executed  by the Trust on  behalf  of one or more  series of the
Trust,  the parties hereto  acknowledge  that the assets and liabilities of each
series of the Trust are separate and  distinct  and that the  obligations  of or
arising out of this instrument are binding solely upon the assets or property of
the series on whose behalf the Trust has executed this instrument.  If the Trust
has executed this instrument on behalf of more than one series of the Trust, the
parties hereto also agree that the obligations of each series hereunder shall be
several and not joint, in accordance with its proportionate  interest hereunder,
and  the  parties  hereto  agree  not to  proceed  against  any  series  for the
obligations of another series.

MFS SERIES TRUST X,
  on behalf of MFS/FOREIGN & COLONIAL EMERGING MARKETS EQUITY FUND


By:  A. KEITH BRODKIN
     A. Keith Brodkin
     Chairman

<PAGE>
                                                           EXHIBIT NO. 99.5(i)


                             SUB-ADVISORY AGREEMENT


         SUB-ADVISORY AGREEMENT,  dated this 1st day of September,  1995, by and
between FOREIGN & COLONIAL  MANAGEMENT  LTD., a company  incorporated  under the
laws of England and Wales (the  "Sub-Adviser"),  and FOREIGN & COLONIAL EMERGING
MARKETS  LIMITED,  a company  incorporated  under the laws of England  and Wales
("FCEM").

                                  WITNESSETH:

         WHEREAS,  Massachusetts  Financial  Services  Company  (the  "Adviser")
provides MFS/Foreign & Colonial International Growth Fund (the "Fund"), a series
of MFS Series Trust X (the "Trust"),  an open-end  investment company registered
under the Investment Company Act of 1940, as amended (the "1940 Act"),  business
services  pursuant  to  the  terms  and  conditions  of an  investment  advisory
agreement dated September 1, 1995 (the "Advisory Agreement") between the Adviser
and the Trust, on behalf of the Fund;

         WHEREAS,  the Sub-Adviser  provides services to the Adviser pursuant to
the terms and conditions of a  sub-advisory  agreement  dated  September 1, 1995
(the "FCM Sub-Advisory Agreement") between the Adviser and the Sub-Adviser; and

         WHEREAS,  FCEM is willing to provide services to the Sub-Adviser on the
terms and conditions hereinafter set forth.

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
of the parties  hereto as herein set forth,  the parties  covenant  and agree as
follows:


         1.  Duties of FCEM. Subject to the  supervision  of the Trustees of the
Trust,  the Adviser and the  Sub-Adviser,  FCEM will: (a) manage such portion of
the Fund's assets as the Adviser,  Sub-Adviser  and FCEM shall from time to time
mutually designate (the "Designated Assets") on behalf of the Fund in accordance
with the Fund's investment objective,  policies and limitations as stated in the
Fund's then current  Prospectus (the  "Prospectus")  and Statement of Additional
Information (the "Statement"),  and the Trust's Amended and Restated Declaration
of Trust dated January 18, 1995 and Amended and Restated  By-Laws,  each as from
time to time in effect (respectively, the"Declaration" and the "By-Laws") and in
compliance with the 1940 Act and the rules,  regulations and orders  thereunder;
(b) make  investment  decisions  for the Fund  with  respect  to the  Designated
Assets;  (c) place purchase and sale orders for portfolio  transactions  for the
Fund with respect to the Designated Assets; (d) manage otherwise uninvested cash
assets of the Fund with respect to the  Designated  Assets ; (e) as the agent of
the Fund, give  instructions  (including trade tickets) to the custodian and any
sub-custodian  of  the  Fund  as  to  deliveries  of  securities,  transfers  of
currencies  and payments of cash for the account of the Fund with respect to the
Designated Assets (FCEM shall promptly notify the Adviser and the Sub-Adviser of
such
<PAGE>
instructions);  (f) employ  professional  portfolio managers to provide research
services to the Fund; (g) attend  periodic  meetings of the Board of Trustees of
the Trust and (h) obtain all the registrations,  qualifications and consents, on
behalf of the Fund, which are necessary for the Fund to purchase and sell assets
in each  jurisdiction  (other  than the United  States) in which the  Designated
Assets are to be  invested  (FCEM  shall  promptly  provide  the Adviser and the
Sub-Adviser with copies of any such registrations, qualifications and consents).
In providing  these  services,  FCEM will  furnish  continuously  an  investment
program with respect to the Designated  Assets.  FCEM shall be  responsible  for
monitoring  the  Fund's  compliance  with the  Prospectus,  the  Statement,  the
Declaration,  the By-Laws and the 1940 Act and the rules, regulations and orders
thereunder and in monitoring  such compliance FCEM shall do so in the functional
currency of the Fund.  FCEM shall only be responsible  for  compliance  with the
above-mentioned   restrictions  in  regards  to  the  Designated   Assets.   The
Sub-Adviser  agrees to provide FCEM with such  assistance  as may be  reasonably
requested  by FCEM in  connection  with its  activities  under  this  Agreement,
including,  without  limitation,  information  concerning  the  Fund,  its funds
available,  or to become  available,  for  investment  and  generally  as to the
conditions of the Fund's affairs.


         Should the Trustees of the Trust or the Adviser and the  Sub-Adviser at
any time make any  determination as to investment policy and notify FCEM thereof
in writing,  FCEM shall be bound by such  determination  for the period, if any,
specified  in such notice or until  notified  that such  determination  has been
revoked.  Further,  the Adviser and the Sub-Adviser or the Trustees of the Trust
may at any time,  upon written notice to FCEM,  suspend or restrict the right of
FCEM to  determine  what assets of the Fund shall be  purchased or sold and what
portion, if any, of the Fund's assets shall be held uninvested. It is understood
that the Adviser and the  Sub-Adviser  undertake  to discuss  with FCEM any such
determinations  of investment policy and any such suspensions or restrictions on
the right of FCEM to  determine  what assets of the Fund shall be  purchased  or
sold or held uninvested, prior to the implementation thereof.

         2.  Execution  of  Certain  Documents.  Subject  to any  other  written
instructions of the Adviser, the Sub-Adviser and the Trustees of the Trust, FCEM
is hereby appointed the Sub-Adviser's and the Trust's agent and attorney-in-fact
to execute account documentation,  agreements,  contracts and other documents as
FCEM shall be requested by brokers, dealers, counterparties and other persons in
connection with its management of the Designated Assets.

         3.  Brokerage. In connection with the selections of brokers, dealers or
other  entities and the placing of orders for the purchase and sale of portfolio
investments for the Fund with respect to the Designated Assets, FCEM is directed
to seek  for the  Fund  execution  at the most  favorable  price by  responsible
brokerage firms at reasonably  competitive  commission rates. In fulfilling this
requirement,  FCEM  shall  not be  deemed to have  acted  unlawfully  or to have
breached any duty,  created by this Agreement or otherwise,  solely by reason of
its having caused the Fund to pay a broker,  dealer or other entity an amount of
commission  for  effecting a securities  transaction  in excess of the amount of
commission  another  broker,  dealer or other  entity  would  have  charged  for
effecting that transaction, if FCEM determined in good faith that such amount of
commission was reasonable in relation to the value of the brokerage and research
services (within the meaning of Section 28(e) of the Securities  Exchange Act of
1934, as
<PAGE>
amended)  provided by such broker,  dealer or other  entity,  viewed in terms of
either that  particular  transaction  or FCEM's  overall  responsibilities  with
respect  to the Fund and to other  clients  of FCEM as to which  FCEM  exercises
investment discretion.

         4.  Reports.  FCEM shall  furnish  to the  Trustees  of the Trust,  the
Adviser or the  Sub-Adviser,  or all of them, as may be  appropriate,  quarterly
reports of its  activities on behalf of the Fund, as required by applicable  law
or as otherwise  requested  from time to time by the Trustees of the Trust,  the
Adviser  or  the  Sub-Adviser,   and  such  additional   information,   reports,
evaluations,  analyses and opinions as the Trustees of the Trust, the Adviser or
the Sub-Adviser, as appropriate, may request from time to time.

         5.  Services to Other  Companies  or Accounts.  On occasions  when FCEM
deems the purchase or sale of a security to be in the best  interest of the Fund
as well as other clients,  FCEM, to the extent  permitted by applicable laws and
regulations,  may, but shall be under no obligation to, aggregate the securities
to be so purchased or sold in order to obtain the most favorable  price or lower
brokerage commissions and efficient execution.  In such event, allocation of the
securities  so  purchased  or  sold,  as well as the  expenses  incurred  in the
transaction  will be made by FCEM in the  manner  it  considers  to be the  most
equitable.  FCEM agrees to allocate similarly opportunities to sell or otherwise
dispose of securities among the Fund and other clients of FCEM.


         6.  Compensation of FCEM. For the services to be rendered by FCEM under
this Agreement,  the Sub-Adviser  shall pay to FCEM  compensation,  computed and
paid monthly in arrears, at a rate of 1.00% of the average daily net asset value
of the Designated  Assets on an annualized  basis.  If FCEM shall serve for less
than the whole of any month,  the  compensation  payable to FCEM with respect to
the Fund will be prorated. FCEM will pay its expenses incurred in performing its
duties under this Agreement.  Neither the Trust,  the Adviser nor the Fund shall
be liable to FCEM for the  compensation  of FCEM. For the purpose of determining
fees  payable to FCEM,  the value of the Fund's net assets  shall be computed at
the times and in the manner specified in the Prospectus and/or Statement. In the
event that the  Sub-Adviser  reduces its  management  fee payable  under the FCM
Sub-Advisory  Agreement  in order to comply  with the expense  limitations  of a
State securities commission or otherwise (but not a voluntary  reduction),  FCEM
agrees to reduce its fee payable under this Agreement by a pro rata amount.


         7.  Limitation  of Liability of FCEM.  FCEM shall not 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
Fund,  except for  willful  misfeasance,  bad faith or gross  negligence  in the
performance of its duties and obligations hereunder. The Trust, on behalf of the
Fund,  may enforce any  obligations of FCEM under this Agreement and may recover
directly from FCEM for any liability it may have to the Fund.

         8.  Activities of FCEM. The services of FCEM to the Fund are not deemed
to be  exclusive,  FCEM being free to render  investment  advisory  and/or other
services  to  others.   It  is  understood  that  the  Trustees,   officers  and
shareholders  of the Trust,  the Fund, the Adviser or the
<PAGE>
Sub-Adviser  are or may become  interested  in FCEM or any  person  controlling,
controlled  by or  under  common  control  with  FCEM,  as  trustees,  officers,
employees or otherwise and that trustees,  officers and employees of FCEM or any
person  controlling,  controlled by or under common control with FCEM may become
similarly  interested in the Trust, the Fund, the Adviser or the Sub-Adviser and
that FCEM may be or become interested in the Fund as a shareholder or otherwise.

         9.  Covenants  of FCEM.  FCEM  agrees  that it (a)  will not deal  with
itself, "affiliated persons" of FCEM, the Sub-Adviser, the Trustees of the Trust
or the Fund's distributor,  as principals,  agents, brokers or dealers in making
purchases or sales of securities or other  property for the account of the Fund,
except  as  permitted  by the 1940 Act and the  rules,  regulations  and  orders
thereunder  and subject to the prior written  approval of the Adviser,  (b) will
not take a long or short  position in the shares of the Fund except as permitted
by the  Declaration  and (c)  will  comply  with  all  other  provisions  of the
Declaration  and the  By-Laws  and the  then-current  Prospectus  and  Statement
relative to FCEM and its trustees, officers, employees and affiliates.

         10. Representations, Warranties and Additional Agreements of FCEM.
FCEM represents, warrants and agrees that:

         (a) It: (i) is registered as an investment adviser under the U.S.
Investment Advisers Act of 1940 (the "Advisers Act"), is authorized to undertake
investment  business in the United  Kingdom by virtue of its  membership  in the
Investment Management  Regulatory  Organisation ("IMRO") and is registered under
the laws of any  jurisdiction  in which FCEM is required to be  registered as an
investment adviser in order to perform its obligations under this Agreement, and
will  continue  to be so  registered  for so long as this  Agreement  remains in
effect;  (ii)  is not  prohibited  by the  1940  Act or the  Advisers  Act  from
performing the services contemplated by this Agreement;  (iii) has met, and will
continue  to meet for so long as this  Agreement  remains in  effect,  any other
applicable Federal or State requirements,  or the applicable requirements of any
regulatory or industry  self-regulatory agency,  necessary to be met in order to
perform the services  contemplated by this Agreement;  (iv) has the authority to
enter into and perform the services  contemplated  by this  Agreement;  (v) will
immediately  notify the Adviser and the Sub-Adviser in writing of the occurrence
of any event that would disqualify FCEM from serving as an investment adviser of
an investment company pursuant to Section 9(a) of the 1940 Act or otherwise; and
(vi) will  immediately  notify the Adviser and the Sub-Adviser in writing of any
change of control of FCEM or any parent of FCEM resulting in an  "assignment" of
this Agreement.

         (b) It will maintain, keep current and preserve on behalf of the Fund,
in the manner and for the periods of time  required or permitted by the 1940 Act
and the rules,  regulations  and orders  thereunder and the Advisers Act and the
rules,  regulations  and  orders  thereunder,  records  relating  to  investment
transactions  made by FCEM for the Fund as may be  reasonably  requested  by the
Adviser or the Fund from time to time.  FCEM  agrees  that such  records are the
property of the Fund, and will be
<PAGE>
surrendered to the Fund promptly upon request; provided,  however, that FCEM may
retain copies of such records for archival purposes as required by IMRO.


         (c) FCEM has adopted a written code of ethics complying with the
requirements  of Rule 17j-1 under the 1940 Act and,  if it has not already  done
so, will provide the Adviser,  the Sub-Adviser and the Trust with a copy of such
code of ethics, and upon any amendment to such code of ethics,  promptly provide
such amendment.  At least annually FCEM will provide the Trust,  the Sub-Adviser
and the Adviser with a certificate  signed by the chief  compliance  officer (or
the person  performing such function) of FCEM certifying,  to the best of his or
her  knowledge,  compliance  with  the code of  ethics  during  the  immediately
preceding  twelve (12) month  period,  including  any material  violations of or
amendments to the code of ethics or the administration thereof.

         (d) It has provided the Adviser, the Sub-Adviser and the Trust with a
copy of its Form ADV as most  recently  filed with the  Securities  and Exchange
Commission (the "SEC") and will, promptly after filing any amendment to its Form
ADV  with  the  SEC,  furnish  a copy  of such  amendment  to the  Adviser,  the
Sub-Adviser and the Trust.

         11. Duration and  Termination of this  Agreement.  This Agreement shall
become  effective on the date first above written and shall govern the relations
between the parties hereto thereafter, and shall remain in force until August 1,
1997  and  each  year  thereafter  but  only  so  long  as  its  continuance  is
"specifically  approved at least  annually" (a) by the vote of a majority of the
Trustees  of the  Trust  who are not  "interested  persons"  of the  Trust,  the
Adviser,  the  Sub-Adviser  or FCEM at a  meeting  specifically  called  for the
purpose  of voting on such  approval,  and (b) by the Board of  Trustees  of the
Trust,  or by "vote of a majority of the outstanding  voting  securities" of the
Fund.  This  Agreement  may be terminated at any time without the payment of any
penalty by the Trustees of the Trust,  by "vote of a majority of the outstanding
voting securities" of the Fund or by the Adviser or the Sub-Adviser, on not more
than sixty days nor less than thirty days written notice, or by FCEM on not more
than ninety days nor less than sixty days written  notice.  This Agreement shall
automatically  terminate in the event of its  "assignment"  or in the event that
the FCM Sub-Advisory  Agreement or the Advisory  Agreement shall have terminated
for any reason.

         12. Amendments to this Agreement.  This Agreement may be amended only
if such amendment is approved by "vote of a majority of the outstanding
voting securities" of the Fund, by the Adviser, by the Sub-Adviser and by FCEM.

         13. Certain  Definitions.  The terms  "specifically  approved at least
annually",   "vote  of  a  majority  of  the  outstanding  voting   securities",
"assignment",  "control", "affiliated person" and "interested person", when used
in this Agreement,  shall have the respective meanings  specified,  and shall be
construed in a manner  consistent with, the 1940 Act and the rules,  regulations
and orders thereunder, subject, however, to such exemptions as may be granted by
the SEC under the 1940 Act.
<PAGE>

         14. Survival  of  Representations  and  Warranties;   Duty  to  Update
Information. All representations and warranties made by FCEM pursuant to Section
9 hereof  shall  survive  for the  duration  of this  Agreement  and FCEM  shall
immediately  notify,  but in no event  later than five (5)  business  days,  the
Adviser  and the  Sub-Adviser  in writing  upon  becoming  aware that any of the
foregoing representations and warranties are no longer true.

         15. Miscellaneous. This Agreement shall be governed by and construed in
accordance  with the internal laws of The  Commonwealth  of  Massachusetts.  All
notices  provided for by this Agreement  shall be in writing and shall be deemed
given when received, against appropriate receipt, by the Sub-Adviser's Secretary
in the case of the Sub-Adviser,  by the Adviser's General Counsel in the case of
the  Adviser,  by  FCEM's  Secretary  in the  case  of FCEM  and by the  Trust's
Secretary  in the  case of the  Fund,  or such  other  person  as a party  shall
designate by notice to the other parties.  This Agreement constitutes the entire
agreement  among the parties hereto and supersedes any prior agreement among the
parties  relating to the subject  matter  hereof.  The section  headings of this
Agreement are for convenience of reference and do not constitute a part hereof.
<PAGE>
         IN WITNESS  WHEREOF,  the  parties  have caused  this  Agreement  to be
executed and  delivered  in their names and on their behalf by the  undersigned,
thereunto duly authorized,  and their respective seals to be hereto affixed, all
as of the day and year first written above.

                                       FOREIGN & COLONIAL MANAGEMENT LTD.


                                       By:     JAMES OGILVY
                                               James Ogilvy


                                       By:     JONATHAN LUBRAN
                                               Jonathan Lubran


                                       FOREIGN & COLONIAL EMERGING MARKETS
                                         LIMITED



                                       By:     AUDLEY TWISTON DAVIES
                                               Audley Twiston Davies


                                       By:     KAREN CLARKE
                                               Karen Clarke


The foregoing is hereby agreed to:

         A copy of the  Declaration  of Trust of the  Trust is on file  with the
Secretary of State of The  Commonwealth  of  Massachusetts.  The parties  hereto
acknowledge  that the  obligations of or arising out of this  instrument are not
binding  upon  any of the  Trust's  trustees,  officers,  employees,  agents  or
shareholders  individually,  but are binding solely upon the assets and property
of the Trust in accordance with its proportionate  interest  hereunder.  If this
instrument  is  executed  by the Trust on  behalf  of one or more  series of the
Trust,  the parties hereto  acknowledge  that the assets and liabilities of each
series of the Trust are separate and  distinct  and that the  obligations  of or
arising out of this instrument are binding solely upon the assets or property of
the series on whose behalf the Trust has executed this instrument.  If the Trust
has executed this instrument on behalf of more than one series of the Trust, the
parties hereto also agree that the obligations of each series hereunder shall be
several and not joint, in accordance with its proportionate  interest hereunder,
and  the  parties  hereto  agree  not to  proceed  against  any  series  for the
obligations of another series.

MFS SERIES TRUST X
on behalf of MFS/FOREIGN & COLONIAL INTERNATIONAL GROWTH FUND

By: A. KEITH BRODKIN
    A. Keith Brodkin
    Chairman
<PAGE>

MASSACHUSETTS FINANCIAL SERVICES COMPANY

By: JEFFREY L. SHAMES
    Jeffrey L. Shames
    President

<PAGE>
                                                           EXHIBIT NO. 99.5(j)


                             SUB-ADVISORY AGREEMENT


         SUB-ADVISORY AGREEMENT,  dated this 1st day of September,  1995, by and
between FOREIGN & COLONIAL  MANAGEMENT  LTD., a company  incorporated  under the
laws of England and Wales (the  "Sub-Adviser"),  and FOREIGN & COLONIAL EMERGING
MARKETS  LIMITED,  a company  incorporated  under the laws of England  and Wales
("FCEM").

                                  WITNESSETH:

         WHEREAS,  Massachusetts  Financial  Services  Company  (the  "Adviser")
provides  MFS/Foreign  & Colonial  International  Growth  and  Income  Fund (the
"Fund"),  a series of MFS Series Trust X (the "Trust"),  an open-end  investment
company  registered  under the  Investment  Company Act of 1940, as amended (the
"1940  Act"),  business  services  pursuant  to the terms and  conditions  of an
investment advisory agreement dated September 1, 1995 (the "Advisory Agreement")
between the Adviser and the Trust, on behalf of the Fund;

         WHEREAS,  the Sub-Adviser  provides services to the Adviser pursuant to
the terms and conditions of a  sub-advisory  agreement  dated  September 1, 1995
(the "FCM Sub-Advisory Agreement") between the Adviser and the Sub-Adviser; and

         WHEREAS,  FCEM is willing to provide services to the Sub-Adviser on the
terms and conditions hereinafter set forth.

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
of the parties  hereto as herein set forth,  the parties  covenant  and agree as
follows:

         1.  Duties of FCEM.  Subject to the supervision  of the Trustees of the
Trust,  the Adviser and the  Sub-Adviser,  FCEM will: (a) manage such portion of
the Fund's assets as the Adviser,  Sub-Adviser  and FCEM shall from time to time
mutually designate (the "Designated Assets") on behalf of the Fund in accordance
with the Fund's investment objective,  policies and limitations as stated in the
Fund's then current  Prospectus (the  "Prospectus")  and Statement of Additional
Information (the "Statement"),  and the Trust's Amended and Restated Declaration
of Trust dated January 18, 1995 and Amended and Restated  By-Laws,  each as from
time to time in effect  (respectively,  the "Declaration" and the "By-Laws") and
in  compliance  with  the  1940  Act  and  the  rules,  regulations  and  orders
thereunder;  (b) make  investment  decisions  for the Fund with  respect  to the
Designated Assets; (c) place purchase and sale orders for portfolio transactions
for the Fund  with  respect  to the  Designated  Assets;  (d)  manage  otherwise
uninvested cash assets of the Fund with respect to the Designated Assets; (e) as
the  agent of the Fund,  give  instructions  (including  trade  tickets)  to the
custodian and any  sub-custodian  of the Fund as to  deliveries  of  securities,
transfers  of  currencies  and payments of cash for the account of the Fund with
respect to the Designated Assets (FCEM shall promptly notify the Adviser and the
Sub-Adviser of such
<PAGE>
instructions);  (f) employ  professional  portfolio managers to provide research
services to the Fund; (g) attend  periodic  meetings of the Board of Trustees of
the Trust and (h) obtain all the registrations,  qualifications and consents, on
behalf of the Fund, which are necessary for the Fund to purchase and sell assets
in each  jurisdiction  (other  than the United  States) in which the  Designated
Assets are to be  invested  (FCEM  shall  promptly  provide  the Adviser and the
Sub-Adviser with copies of any such registrations, qualifications and consents).
In providing  these  services,  FCEM will  furnish  continuously  an  investment
program with respect to the Designated  Assets.  FCEM shall be  responsible  for
monitoring  the  Fund's  compliance  with the  Prospectus,  the  Statement,  the
Declaration,  the By-Laws and the 1940 Act and the rules, regulations and orders
thereunder and in monitoring  such compliance FCEM shall do so in the functional
currency of the Fund.  FCEM shall only be responsible  for  compliance  with the
above-mentioned   restrictions  in  regards  to  the  Designated   Assets.   The
Sub-Adviser  agrees to provide FCEM with such  assistance  as may be  reasonably
requested  by FCEM in  connection  with its  activities  under  this  Agreement,
including,  without  limitation,  information  concerning  the  Fund,  its funds
available,  or to become  available,  for  investment  and  generally  as to the
conditions of the Fund's affairs.

         Should the Trustees of the Trust or the Adviser and the  Sub-Adviser at
any time make any  determination as to investment policy and notify FCEM thereof
in writing,  FCEM shall be bound by such  determination  for the period, if any,
specified  in such notice or until  notified  that such  determination  has been
revoked.  Further,  the Adviser and the Sub-Adviser or the Trustees of the Trust
may at any time,  upon written notice to FCEM,  suspend or restrict the right of
FCEM to  determine  what assets of the Fund shall be  purchased or sold and what
portion, if any, of the Fund's assets shall be held uninvested. It is understood
that the Adviser and the  Sub-Adviser  undertake  to discuss  with FCEM any such
determinations  of investment policy and any such suspensions or restrictions on
the right of FCEM to  determine  what assets of the Fund shall be  purchased  or
sold or held uninvested, prior to the implementation thereof.

         2.  Execution  of  Certain  Documents.  Subject  to any  other  written
instructions of the Adviser, the Sub-Adviser and the Trustees of the Trust, FCEM
is hereby appointed the Sub-Adviser's and the Trust's agent and attorney-in-fact
to execute account documentation,  agreements,  contracts and other documents as
FCEM shall be requested by brokers, dealers, counterparties and other persons in
connection with its management of the Designated Assets.

         3.  Brokerage. In connection with the selections of brokers, dealers or
other  entities and the placing of orders for the purchase and sale of portfolio
investments for the Fund with respect to the Designated Assets, FCEM is directed
to seek  for the  Fund  execution  at the most  favorable  price by  responsible
brokerage firms at reasonably  competitive  commission rates. In fulfilling this
requirement,  FCEM  shall  not be  deemed to have  acted  unlawfully  or to have
breached any duty,  created by this Agreement or otherwise,  solely by reason of
its having caused the Fund to pay a broker,  dealer or other entity an amount of
commission  for  effecting a securities  transaction  in excess of the amount of
commission  another  broker,  dealer or other  entity  would  have  charged  for
effecting that transaction, if FCEM determined in good faith that such amount of
commission was reasonable in relation to the value of the brokerage and research
services (within the meaning of Section 28(e) of the Securities  Exchange Act of
1934, as
<PAGE>
amended)  provided by such broker,  dealer or other  entity,  viewed in terms of
either that  particular  transaction  or FCEM's  overall  responsibilities  with
respect  to the Fund and to other  clients  of FCEM as to which  FCEM  exercises
investment discretion.

         4.  Reports.  FCEM shall  furnish  to the  Trustees  of the Trust,  the
Adviser or the  Sub-Adviser,  or all of them, as may be  appropriate,  quarterly
reports of its  activities on behalf of the Fund, as required by applicable  law
or as otherwise  requested  from time to time by the Trustees of the Trust,  the
Adviser  or  the  Sub-Adviser,   and  such  additional   information,   reports,
evaluations,  analyses and opinions as the Trustees of the Trust, the Adviser or
the Sub-Adviser, as appropriate, may request from time to time.

         5.  Services to Other  Companies  or Accounts.  On occasions  when FCEM
deems the purchase or sale of a security to be in the best  interest of the Fund
as well as other clients,  FCEM, to the extent  permitted by applicable laws and
regulations,  may, but shall be under no obligation to, aggregate the securities
to be so purchased or sold in order to obtain the most favorable  price or lower
brokerage commissions and efficient execution.  In such event, allocation of the
securities  so  purchased  or  sold,  as well as the  expenses  incurred  in the
transaction  will be made by FCEM in the  manner  it  considers  to be the  most
equitable.  FCEM agrees to allocate similarly opportunities to sell or otherwise
dispose of securities among the Fund and other clients of FCEM.


         6.  Compensation of FCEM. For the services to be rendered by FCEM under
this Agreement,  the Sub-Adviser  shall pay to FCEM  compensation,  computed and
paid monthly in arrears, at a rate of 1.00% of the average daily net asset value
of the Designated  Assets on an annualized  basis.  If FCEM shall serve for less
than the whole of any month,  the  compensation  payable to FCEM with respect to
the Fund will be prorated. FCEM will pay its expenses incurred in performing its
duties under this Agreement.  Neither the Trust,  the Adviser nor the Fund shall
be liable to FCEM for the  compensation  of FCEM. For the purpose of determining
fees  payable to FCEM,  the value of the Fund's net assets  shall be computed at
the times and in the manner specified in the Prospectus and/or Statement. In the
event that the  Sub-Adviser  reduces its  management  fee payable  under the FCM
Sub-Advisory  Agreement  in order to comply  with the expense  limitations  of a
State securities commission or otherwise (but not a voluntary  reduction),  FCEM
agrees to reduce its fee payable under this Agreement by a pro rata amount.

         7.  Limitation  of Liability of FCEM.  FCEM shall not 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
Fund,  except for  willful  misfeasance,  bad faith or gross  negligence  in the
performance of its duties and obligations hereunder. The Trust, on behalf of the
Fund,  may enforce any  obligations of FCEM under this Agreement and may recover
directly from FCEM for any liability it may have to the Fund.

         8.  Activities of FCEM. The services of FCEM to the Fund are not deemed
to be  exclusive,  FCEM being free to render  investment  advisory  and/or other
services  to  others.   It  is  understood  that  the  Trustees,   officers  and
shareholders  of the Trust,  the Fund, the Adviser or the Sub-Adviser are or may
become  interested  in FCEM or any person  controlling,  controlled  by or
<PAGE>
under common  control with FCEM, as trustees,  officers,  employees or otherwise
and that  trustees,  officers and  employees of FCEM or any person  controlling,
controlled by or under common control with FCEM may become similarly  interested
in the Trust,  the Fund, the Adviser or the  Sub-Adviser and that FCEM may be or
become interested in the Fund as a shareholder or otherwise.

         9.  Covenants  of FCEM.  FCEM  agrees  that it (a)  will not deal  with
itself, "affiliated persons" of FCEM, the Sub-Adviser, the Trustees of the Trust
or the Fund's distributor,  as principals,  agents, brokers or dealers in making
purchases or sales of securities or other  property for the account of the Fund,
except  as  permitted  by the 1940 Act and the  rules,  regulations  and  orders
thereunder  and subject to the prior written  approval of the Adviser,  (b) will
not take a long or short  position in the shares of the Fund except as permitted
by the  Declaration  and (c)  will  comply  with  all  other  provisions  of the
Declaration  and the  By-Laws  and the  then-current  Prospectus  and  Statement
relative to FCEM and its trustees, officers, employees and affiliates.

         10. Representations, Warranties and Additional Agreements of FCEM.
FCEM represents, warrants and agrees that:

         (a) It: (i) is registered as an  investment adviser under the U.S.
Investment Advisers Act of 1940 (the "Advisers Act"), is authorized to undertake
investment  business in the United  Kingdom by virtue of its  membership  in the
Investment Management  Regulatory  Organisation ("IMRO") and is registered under
the laws of any  jurisdiction  in which FCEM is required to be  registered as an
investment adviser in order to perform its obligations under this Agreement, and
will  continue  to be so  registered  for so long as this  Agreement  remains in
effect;  (ii)  is not  prohibited  by the  1940  Act or the  Advisers  Act  from
performing the services contemplated by this Agreement;  (iii) has met, and will
continue  to meet for so long as this  Agreement  remains in  effect,  any other
applicable Federal or State requirements,  or the applicable requirements of any
regulatory or industry  self-regulatory agency,  necessary to be met in order to
perform the services  contemplated by this Agreement;  (iv) has the authority to
enter into and perform the services  contemplated  by this  Agreement;  (v) will
immediately  notify the Adviser and the Sub-Adviser in writing of the occurrence
of any event that would disqualify FCEM from serving as an investment adviser of
an investment company pursuant to Section 9(a) of the 1940 Act or otherwise; and
(vi) will  immediately  notify the Adviser and the Sub-Adviser in writing of any
change of control of FCEM or any parent of FCEM resulting in an  "assignment" of
this Agreement.

         (b) It will maintain, keep current and preserve on behalf of the Fund,
in the manner and for the periods of time  required or permitted by the 1940 Act
and the rules,  regulations  and orders  thereunder and the Advisers Act and the
rules,  regulations  and  orders  thereunder,  records  relating  to  investment
transactions  made by FCEM for the Fund as may be  reasonably  requested  by the
Adviser or the Fund from time to time.  FCEM  agrees  that such  records are the
property of the Fund, and will be
<PAGE>
surrendered to the Fund promptly upon request; provided,  however, that FCEM may
retain copies of such records for archival purposes as required by IMRO.

         (c) FCEM has adopted a written code of ethics complying with the
requirements  of Rule 17j-1 under the 1940 Act and,  if it has not already  done
so, will provide the Adviser,  the Sub-Adviser and the Trust with a copy of such
code of ethics, and upon any amendment to such code of ethics,  promptly provide
such amendment.  At least annually FCEM will provide the Trust,  the Sub-Adviser
and the Adviser with a certificate  signed by the chief  compliance  officer (or
the person  performing such function) of FCEM certifying,  to the best of his or
her  knowledge,  compliance  with  the code of  ethics  during  the  immediately
preceding  twelve (12) month  period,  including  any material  violations of or
amendments to the code of ethics or the administration thereof.

         (d) It has provided the Adviser, the Sub-Adviser and the Trust with a
copy of its Form ADV as most  recently  filed with the  Securities  and Exchange
Commission (the "SEC") and will, promptly after filing any amendment to its Form
ADV  with  the  SEC,  furnish  a copy  of such  amendment  to the  Adviser,  the
Sub-Adviser and the Trust.

         11. Duration and  Termination of this  Agreement.  This Agreement shall
become  effective on the date first above written and shall govern the relations
between the parties hereto thereafter, and shall remain in force until August 1,
1997  and  each  year  thereafter  but  only  so  long  as  its  continuance  is
"specifically  approved at least  annually" (a) by the vote of a majority of the
Trustees  of the  Trust  who are not  "interested  persons"  of the  Trust,  the
Adviser,  the  Sub-Adviser  or FCEM at a  meeting  specifically  called  for the
purpose  of voting on such  approval,  and (b) by the Board of  Trustees  of the
Trust,  or by "vote of a majority of the outstanding  voting  securities" of the
Fund.  This  Agreement  may be terminated at any time without the payment of any
penalty by the Trustees of the Trust,  by "vote of a majority of the outstanding
voting securities" of the Fund or by the Adviser or the Sub-Adviser, on not more
than sixty days nor less than thirty days written notice, or by FCEM on not more
than ninety days nor less than sixty days written  notice.  This Agreement shall
automatically  terminate in the event of its  "assignment"  or in the event that
the FCM Sub-Advisory  Agreement or the Advisory  Agreement shall have terminated
for any reason.

         12. Amendments to this Agreement.  This Agreement may be amended only
if such amendment is approved by "vote of a majority of the  outstanding  voting
securities" of the Fund, by the Adviser, by the Sub-Adviser and by FCEM.

         13. Certain  Definitions.  The terms  "specifically  approved at least
annually",   "vote  of  a  majority  of  the  outstanding  voting   securities",
"assignment",  "control", "affiliated person" and "interested person", when used
in this Agreement,  shall have the respective meanings  specified,  and shall be
construed in a manner  consistent with, the 1940 Act and the rules,  regulations
and orders thereunder, subject, however, to such exemptions as may be granted by
the SEC under the 1940 Act.
<PAGE>

         14. Survival  of  Representations  and  Warranties;   Duty  to  Update
Information. All representations and warranties made by FCEM pursuant to Section
9 hereof  shall  survive  for the  duration  of this  Agreement  and FCEM  shall
immediately  notify,  but in no event  later than five (5)  business  days,  the
Adviser  and the  Sub-Adviser  in writing  upon  becoming  aware that any of the
foregoing representations and warranties are no longer true.

         15. Miscellaneous. This Agreement shall be governed by and construed in
accordance  with the internal laws of The  Commonwealth  of  Massachusetts.  All
notices  provided for by this Agreement  shall be in writing and shall be deemed
given when received, against appropriate receipt, by the Sub-Adviser's Secretary
in the case of the Sub-Adviser,  by the Adviser's General Counsel in the case of
the  Adviser,  by  FCEM's  Secretary  in the  case  of FCEM  and by the  Trust's
Secretary  in the  case of the  Fund,  or such  other  person  as a party  shall
designate by notice to the other parties.  This Agreement constitutes the entire
agreement  among the parties hereto and supersedes any prior agreement among the
parties  relating to the subject  matter  hereof.  The section  headings of this
Agreement are for convenience of reference and do not constitute a part hereof.
<PAGE>
         IN WITNESS  WHEREOF,  the  parties  have caused  this  Agreement  to be
executed and  delivered  in their names and on their behalf by the  undersigned,
thereunto duly authorized,  and their respective seals to be hereto affixed, all
as of the day and year first written above.

                                       FOREIGN & COLONIAL MANAGEMENT LTD.


                                       By:     JAMES OGILVY
                                               James Ogilvy


                                       By:     JONATHAN LUBRAN
                                               Jonathan Lubran


                                       FOREIGN & COLONIAL EMERGING MARKETS
                                         LIMITED


                                       By:     AUDLEY TWISTON DAVIES
                                               Audley Twiston Davies


                                       By:     KAREN CLARKE
                                               Karen Clarke

The foregoing is hereby agreed to:

         A copy of the  Declaration  of Trust of the  Trust is on file  with the
Secretary of State of The  Commonwealth  of  Massachusetts.  The parties  hereto
acknowledge  that the  obligations of or arising out of this  instrument are not
binding  upon  any of the  Trust's  trustees,  officers,  employees,  agents  or
shareholders  individually,  but are binding solely upon the assets and property
of the Trust in accordance with its proportionate  interest  hereunder.  If this
instrument  is  executed  by the Trust on  behalf  of one or more  series of the
Trust,  the parties hereto  acknowledge  that the assets and liabilities of each
series of the Trust are separate and  distinct  and that the  obligations  of or
arising out of this instrument are binding solely upon the assets or property of
the series on whose behalf the Trust has executed this instrument.  If the Trust
has executed this instrument on behalf of more than one series of the Trust, the
parties hereto also agree that the obligations of each series hereunder shall be
several and not joint, in accordance with its proportionate  interest hereunder,
and  the  parties  hereto  agree  not to  proceed  against  any  series  for the
obligations of another series.

MFS SERIES TRUST X
on behalf of MFS/FOREIGN & COLONIAL INTERNATIONAL GROWTH AND INCOME FUND


By: A. KEITH BRODKIN
    A. Keith Brodkin
    Chairman
<PAGE>

MASSACHUSETTS FINANCIAL SERVICES COMPANY

By: JEFFREY L. SHAMES
    Jeffrey L. Shames
    President

<PAGE>
                                                           EXHIBIT NO. 99.5(k)


                             SUB-ADVISORY AGREEMENT


         SUB-ADVISORY AGREEMENT,  dated this 1st day of September,  1995, by and
between FOREIGN & COLONIAL  MANAGEMENT  LTD., a company  incorporated  under the
laws of England and Wales (the  "Sub-Adviser"),  and FOREIGN & COLONIAL EMERGING
MARKETS  LIMITED,  a company  incorporated  under the laws of England  and Wales
("FCEM").

                                  WITNESSETH:

         WHEREAS,  Massachusetts  Financial  Services  Company  (the  "Adviser")
provides  MFS/Foreign & Colonial  Emerging  Markets Equity Fund (the "Fund"),  a
series of MFS Series  Trust X (the  "Trust"),  an  open-end  investment  company
registered  under the  Investment  Company  Act of 1940,  as amended  (the "1940
Act"),  business  services pursuant to the terms and conditions of an investment
advisory  agreement dated September 1, 1995 (the "Advisory  Agreement")  between
the Adviser and the Trust, on behalf of the Fund;

         WHEREAS,  the Sub-Adviser  provides services to the Adviser pursuant to
the terms and conditions of a  sub-advisory  agreement  dated  September 1, 1995
(the "FCM Sub-Advisory Agreement") between the Adviser and the Sub-Adviser; and

         WHEREAS,  FCEM is willing to provide services to the Sub-Adviser on the
terms and conditions hereinafter set forth.

         NOW, THEREFORE, in consideration of the mutual covenants and agreements
of the parties  hereto as herein set forth,  the parties  covenant  and agree as
follows:

         1.  Duties of FCEM. Subject to the supervision  of the Trustees of the
Trust,  the Adviser and the  Sub-Adviser,  FCEM will: (a) manage such portion of
the Fund's assets as the Adviser,  Sub-Adviser  and FCEM shall from time to time
mutually designate (the "Designated Assets") on behalf of the Fund in accordance
with the Fund's investment objective,  policies and limitations as stated in the
Fund's then current  Prospectus (the  "Prospectus")  and Statement of Additional
Information (the "Statement"),  and the Trust's Amended and Restated Declaration
of Trust dated January 18, 1995 and Amended and Restated  By-Laws,  each as from
time to time in effect  (respectively,  the "Declaration" and the "By-Laws") and
in  compliance  with  the  1940  Act  and  the  rules,  regulations  and  orders
thereunder;  (b) make  investment  decisions  for the Fund with  respect  to the
Designated Assets; (c) place purchase and sale orders for portfolio transactions
for the Fund  with  respect  to the  Designated  Assets;  (d)  manage  otherwise
uninvested cash assets of the Fund with respect to the Designated Assets; (e) as
the  agent of the Fund,  give  instructions  (including  trade  tickets)  to the
custodian and any  sub-custodian  of the Fund as to  deliveries  of  securities,
transfers  of  currencies  and payments of cash for the account of the Fund with
respect to the Designated Assets (FCEM shall promptly notify the Adviser and the
Sub-Adviser of such
<PAGE>
instructions);  (f) employ  professional  portfolio managers to provide research
services to the Fund; (g) attend  periodic  meetings of the Board of Trustees of
the Trust and (h) obtain all the registrations,  qualifications and consents, on
behalf of the Fund, which are necessary for the Fund to purchase and sell assets
in each  jurisdiction  (other  than the United  States) in which the  Designated
Assets are to be  invested  (FCEM  shall  promptly  provide  the Adviser and the
Sub-Adviser with copies of any such registrations, qualifications and consents).
In providing  these  services,  FCEM will  furnish  continuously  an  investment
program with respect to the Designated  Assets.  FCEM shall be  responsible  for
monitoring  the  Fund's  compliance  with the  Prospectus,  the  Statement,  the
Declaration,  the By-Laws and the 1940 Act and the rules, regulations and orders
thereunder and in monitoring  such compliance FCEM shall do so in the functional
currency of the Fund.  FCEM shall only be responsible  for  compliance  with the
above-mentioned   restrictions  in  regards  to  the  Designated   Assets.   The
Sub-Adviser  agrees to provide FCEM with such  assistance  as may be  reasonably
requested  by FCEM in  connection  with its  activities  under  this  Agreement,
including,  without  limitation,  information  concerning  the  Fund,  its funds
available,  or to become  available,  for  investment  and  generally  as to the
conditions of the Fund's affairs.

         Should the Trustees of the Trust or the Adviser and the  Sub-Adviser at
any time make any  determination as to investment policy and notify FCEM thereof
in writing,  FCEM shall be bound by such  determination  for the period, if any,
specified  in such notice or until  notified  that such  determination  has been
revoked.  Further,  the Adviser and the Sub-Adviser or the Trustees of the Trust
may at any time,  upon written notice to FCEM,  suspend or restrict the right of
FCEM to  determine  what assets of the Fund shall be  purchased or sold and what
portion, if any, of the Fund's assets shall be held uninvested. It is understood
that the Adviser and the  Sub-Adviser  undertake  to discuss  with FCEM any such
determinations  of investment policy and any such suspensions or restrictions on
the right of FCEM to  determine  what assets of the Fund shall be  purchased  or
sold or held uninvested, prior to the implementation thereof.

         2.  Execution  of  Certain  Documents.  Subject  to any  other  written
instructions of the Adviser, the Sub-Adviser and the Trustees of the Trust, FCEM
is hereby appointed the Sub-Adviser's and the Trust's agent and attorney-in-fact
to execute account documentation,  agreements,  contracts and other documents as
FCEM shall be requested by brokers, dealers, counterparties and other persons in
connection with its management of the Designated Assets.

         3.  Brokerage. In connection with the selections of brokers, dealers or
other  entities and the placing of orders for the purchase and sale of portfolio
investments for the Fund with respect to the Designated Assets, FCEM is directed
to seek  for the  Fund  execution  at the most  favorable  price by  responsible
brokerage firms at reasonably  competitive  commission rates. In fulfilling this
requirement,  FCEM  shall  not be  deemed to have  acted  unlawfully  or to have
breached any duty,  created by this Agreement or otherwise,  solely by reason of
its having caused the Fund to pay a broker,  dealer or other entity an amount of
commission  for  effecting a securities  transaction  in excess of the amount of
commission  another  broker,  dealer or other  entity  would  have  charged  for
effecting that transaction, if FCEM determined in good faith that such amount of
commission was reasonable in relation to the value of the brokerage and research
services (within the meaning of Section 28(e) of the Securities  Exchange Act of
1934, as
<PAGE>
amended)  provided by such broker,  dealer or other  entity,  viewed in terms of
either that  particular  transaction  or FCEM's  overall  responsibilities  with
respect  to the Fund and to other  clients  of FCEM as to which  FCEM  exercises
investment discretion.

         4.  Reports.  FCEM shall  furnish  to the  Trustees  of the Trust,  the
Adviser or the  Sub-Adviser,  or all of them, as may be  appropriate,  quarterly
reports of its  activities on behalf of the Fund, as required by applicable  law
or as otherwise  requested  from time to time by the Trustees of the Trust,  the
Adviser  or  the  Sub-Adviser,   and  such  additional   information,   reports,
evaluations,  analyses and opinions as the Trustees of the Trust, the Adviser or
the Sub-Adviser, as appropriate, may request from time to time.

         5.  Services to Other  Companies  or Accounts.  On occasions  when FCEM
deems the purchase or sale of a security to be in the best  interest of the Fund
as well as other clients,  FCEM, to the extent  permitted by applicable laws and
regulations,  may, but shall be under no obligation to, aggregate the securities
to be so purchased or sold in order to obtain the most favorable  price or lower
brokerage commissions and efficient execution.  In such event, allocation of the
securities  so  purchased  or  sold,  as well as the  expenses  incurred  in the
transaction  will be made by FCEM in the  manner  it  considers  to be the  most
equitable.  FCEM agrees to allocate similarly opportunities to sell or otherwise
dispose of securities among the Fund and other clients of FCEM.

         6.  Compensation of FCEM. For the services to be rendered by FCEM under
this Agreement,  the Sub-Adviser  shall pay to FCEM  compensation,  computed and
paid monthly in arrears, at a rate of 1.00% of the average daily net asset value
of the Designated  Assets on an annualized  basis.  If FCEM shall serve for less
than the whole of any month,  the  compensation  payable to FCEM with respect to
the Fund will be prorated. FCEM will pay its expenses incurred in performing its
duties under this Agreement.  Neither the Trust,  the Adviser nor the Fund shall
be liable to FCEM for the  compensation  of FCEM. For the purpose of determining
fees  payable to FCEM,  the value of the Fund's net assets  shall be computed at
the times and in the manner specified in the Prospectus and/or Statement. In the
event that the  Sub-Adviser  reduces its  management  fee payable  under the FCM
Sub-Advisory  Agreement  in order to comply  with the expense  limitations  of a
State securities commission or otherwise (but not a voluntary  reduction),  FCEM
agrees to reduce its fee payable under this Agreement by a pro rata amount.

         7.  Limitation  of Liability of FCEM.  FCEM shall not 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
Fund,  except for  willful  misfeasance,  bad faith or gross  negligence  in the
performance of its duties and obligations hereunder. The Trust, on behalf of the
Fund,  may enforce any  obligations of FCEM under this Agreement and may recover
directly from FCEM for any liability it may have to the Fund.

         8.  Activities of FCEM. The services of FCEM to the Fund are not deemed
to be  exclusive,  FCEM being free to render  investment  advisory  and/or other
services  to  others.   It  is  understood  that  the  Trustees,   officers  and
shareholders  of the Trust,  the Fund, the Adviser or the Sub-Adviser are or may
become  interested  in FCEM or any person  controlling,  controlled  by or
<PAGE>
under common  control with FCEM, as trustees,  officers,  employees or otherwise
and that  trustees,  officers and  employees of FCEM or any person  controlling,
controlled by or under common control with FCEM may become similarly  interested
in the Trust,  the Fund, the Adviser or the  Sub-Adviser and that FCEM may be or
become interested in the Fund as a shareholder or otherwise.

         9.  Covenants  of FCEM.  FCEM  agrees  that it (a)  will not deal  with
itself, "affiliated persons" of FCEM, the Sub-Adviser, the Trustees of the Trust
or the Fund's distributor,  as principals,  agents, brokers or dealers in making
purchases or sales of securities or other  property for the account of the Fund,
except  as  permitted  by the 1940 Act and the  rules,  regulations  and  orders
thereunder  and subject to the prior written  approval of the Adviser,  (b) will
not take a long or short  position in the shares of the Fund except as permitted
by the  Declaration  and (c)  will  comply  with  all  other  provisions  of the
Declaration  and the  By-Laws  and the  then-current  Prospectus  and  Statement
relative to FCEM and its trustees, officers, employees and affiliates.

         10. Representations, Warranties and Additional Agreements of FCEM.
FCEM represents, warrants and agrees that:

         (a) It: (i) is registered as an investment adviser under the U.S.
Investment Advisers Act of 1940 (the "Advisers Act"), is authorized to undertake
investment  business in the United  Kingdom by virtue of its  membership  in the
Investment Management  Regulatory  Organisation ("IMRO") and is registered under
the laws of any  jurisdiction  in which FCEM is required to be  registered as an
investment adviser in order to perform its obligations under this Agreement, and
will  continue  to be so  registered  for so long as this  Agreement  remains in
effect;  (ii)  is not  prohibited  by the  1940  Act or the  Advisers  Act  from
performing the services contemplated by this Agreement;  (iii) has met, and will
continue  to meet for so long as this  Agreement  remains in  effect,  any other
applicable Federal or State requirements,  or the applicable requirements of any
regulatory or industry  self-regulatory agency,  necessary to be met in order to
perform the services  contemplated by this Agreement;  (iv) has the authority to
enter into and perform the services  contemplated  by this  Agreement;  (v) will
immediately  notify the Adviser and the Sub-Adviser in writing of the occurrence
of any event that would disqualify FCEM from serving as an investment adviser of
an investment company pursuant to Section 9(a) of the 1940 Act or otherwise; and
(vi) will  immediately  notify the Adviser and the Sub-Adviser in writing of any
change of control of FCEM or any parent of FCEM resulting in an  "assignment" of
this Agreement.

         (b) It will maintain, keep current and preserve on behalf of the Fund,
in the manner and for the periods of time  required or permitted by the 1940 Act
and the rules,  regulations  and orders  thereunder and the Advisers Act and the
rules,  regulations  and  orders  thereunder,  records  relating  to  investment
transactions  made by FCEM for the Fund as may be  reasonably  requested  by the
Adviser or the Fund from time to time.  FCEM  agrees  that such  records are the
property of the Fund, and will be
<PAGE>
surrendered to the Fund promptly upon request; provided,  however, that FCEM may
retain copies of such records for archival purposes as required by IMRO.

         (c) FCEM has adopted a written code of ethics complying with the
requirements  of Rule 17j-1 under the 1940 Act and,  if it has not already  done
so, will provide the Adviser,  the Sub-Adviser and the Trust with a copy of such
code of ethics, and upon any amendment to such code of ethics,  promptly provide
such amendment.  At least annually FCEM will provide the Trust,  the Sub-Adviser
and the Adviser with a certificate  signed by the chief  compliance  officer (or
the person  performing such function) of FCEM certifying,  to the best of his or
her  knowledge,  compliance  with  the code of  ethics  during  the  immediately
preceding  twelve (12) month  period,  including  any material  violations of or
amendments to the code of ethics or the administration thereof.

         (d) It has provided the Adviser, the Sub-Adviser and the Trust with a
copy of its Form ADV as most  recently  filed with the  Securities  and Exchange
Commission (the "SEC") and will, promptly after filing any amendment to its Form
ADV  with  the  SEC,  furnish  a copy  of such  amendment  to the  Adviser,  the
Sub-Adviser and the Trust.

         11. Duration and  Termination of this  Agreement.  This Agreement shall
become  effective on the date first above written and shall govern the relations
between the parties hereto thereafter, and shall remain in force until August 1,
1997  and  each  year  thereafter  but  only  so  long  as  its  continuance  is
"specifically  approved at least  annually" (a) by the vote of a majority of the
Trustees  of the  Trust  who are not  "interested  persons"  of the  Trust,  the
Adviser,  the  Sub-Adviser  or FCEM at a  meeting  specifically  called  for the
purpose  of voting on such  approval,  and (b) by the Board of  Trustees  of the
Trust,  or by "vote of a majority of the outstanding  voting  securities" of the
Fund.  This  Agreement  may be terminated at any time without the payment of any
penalty by the Trustees of the Trust,  by "vote of a majority of the outstanding
voting securities" of the Fund or by the Adviser or the Sub-Adviser, on not more
than sixty days nor less than thirty days written notice, or by FCEM on not more
than ninety days nor less than sixty days written  notice.  This Agreement shall
automatically  terminate in the event of its  "assignment"  or in the event that
the FCM Sub-Advisory  Agreement or the Advisory  Agreement shall have terminated
for any reason.

         12. Amendments to this Agreement.  This Agreement may be amended only
if such amendment is approved by "vote of a majority of the  outstanding  voting
securities" of the Fund, by the Adviser, by the Sub-Adviser and by FCEM.

         13. Certain Definitions. The terms "specifically  approved at least
annually",   "vote  of  a  majority  of  the  outstanding  voting   securities",
"assignment",  "control", "affiliated person" and "interested person", when used
in this Agreement,  shall have the respective meanings  specified,  and shall be
construed in a manner  consistent with, the 1940 Act and the rules,  regulations
and orders thereunder, subject, however, to such exemptions as may be granted by
the SEC under the 1940 Act.
<PAGE>

         14. Survival  of  Representations  and  Warranties;   Duty  to  Update
Information. All representations and warranties made by FCEM pursuant to Section
9 hereof  shall  survive  for the  duration  of this  Agreement  and FCEM  shall
immediately  notify,  but in no event  later than five (5)  business  days,  the
Adviser  and the  Sub-Adviser  in writing  upon  becoming  aware that any of the
foregoing representations and warranties are no longer true.


         15. Miscellaneous. This Agreement shall be governed by and construed in
accordance  with the internal laws of The  Commonwealth  of  Massachusetts.  All
notices  provided for by this Agreement  shall be in writing and shall be deemed
given when received, against appropriate receipt, by the Sub-Adviser's Secretary
in the case of the Sub-Adviser,  by the Adviser's General Counsel in the case of
the  Adviser,  by  FCEM's  Secretary  in the  case  of FCEM  and by the  Trust's
Secretary  in the  case of the  Fund,  or such  other  person  as a party  shall
designate by notice to the other parties.  This Agreement constitutes the entire
agreement  among the parties hereto and supersedes any prior agreement among the
parties  relating to the subject  matter  hereof.  The section  headings of this
Agreement are for convenience of reference and do not constitute a part hereof.
<PAGE>

         IN WITNESS  WHEREOF,  the  parties  have caused  this  Agreement  to be
executed and  delivered  in their names and on their behalf by the  undersigned,
thereunto duly authorized,  and their respective seals to be hereto affixed, all
as of the day and year first written above.

                                       FOREIGN & COLONIAL MANAGEMENT LTD.


                                       By:     JAMES OGILVY
                                               James Ogilvy


                                       By:     JONATHAN LUBRAN
                                               Jonathan Lubran


                                       FOREIGN & COLONIAL EMERGING MARKETS
                                         LIMITED


                                       By:     AUDLEY TWISTON DAVIES
                                               Audley Twiston Davies


                                       By:     KAREN CLARKE
                                               Karen Clarke


The foregoing is hereby agreed to:

         A copy of the  Declaration  of Trust of the  Trust is on file  with the
Secretary of State of The  Commonwealth  of  Massachusetts.  The parties  hereto
acknowledge  that the  obligations of or arising out of this  instrument are not
binding  upon  any of the  Trust's  trustees,  officers,  employees,  agents  or
shareholders  individually,  but are binding solely upon the assets and property
of the Trust in accordance with its proportionate  interest  hereunder.  If this
instrument  is  executed  by the Trust on  behalf  of one or more  series of the
Trust,  the parties hereto  acknowledge  that the assets and liabilities of each
series of the Trust are separate and  distinct  and that the  obligations  of or
arising out of this instrument are binding solely upon the assets or property of
the series on whose behalf the Trust has executed this instrument.  If the Trust
has executed this instrument on behalf of more than one series of the Trust, the
parties hereto also agree that the obligations of each series hereunder shall be
several and not joint, in accordance with its proportionate  interest hereunder,
and  the  parties  hereto  agree  not to  proceed  against  any  series  for the
obligations of another series.

MFS SERIES TRUST X
on behalf of MFS/FOREIGN & COLONIAL EMERGING MARKETS EQUITY FUND

By:  A.KEITH BRODKIN
     A. Keith Brodkin
     Chairman
<PAGE>

MASSACHUSETTS FINANCIAL SERVICES COMPANY

By: JEFFREY L. SHAMES
    Jeffrey L. Shames
    President

<PAGE>
                                                            EXHIBIT NO. 99.6(a)

                             DISTRIBUTION AGREEMENT



         DISTRIBUTION  AGREEMENT,  made this 1st day of September,  1995, by and
between MFS SERIES TRUST X, a  Massachusetts  business trust (the  "Trust"),  on
behalf of each series from time to time of the Trust  (referred to  individually
as a "Fund" and collectively as the "Funds") and MFS FUND DISTRIBUTORS,  INC., a
Delaware corporation (the "Distributor");

         NOW,   THEREFORE,   in   consideration   of  the  mutual  promises  and
undertakings herein contained, the parties hereto agree as follows:

         1.  The Trust  grants to the  Distributor  the  right,  as agent of the
Trust,  to sell Shares of Beneficial  Interest,  without par value, of the Funds
(the  "Shares")  upon the terms  herein  below set forth during the term of this
Agreement.  While this Agreement is in force, the Distributor  agrees to use its
best efforts to find purchasers for Shares.

             The  Distributor  shall have the right, as agent of the Trust, to
order from the Trust the  Shares  needed,  but not more than the  Shares  needed
(except for clerical errors and errors of  transmission)  to fill  unconditional
orders  for  Shares  placed  with the  Distributor  by  dealers,  banks or other
financial  institutions or investors as set forth in the current  Prospectus and
Statement of Additional Information (collectively, the "Prospectus") relating to
the  Shares.  The  price  which  shall be paid to the  Trust  for the  Shares so
purchased  shall be the net asset value used in determining  the public offering
price on which  such  orders  were  based.  The  Distributor  shall  notify  the
Custodian of the Trust,  at the end of each business day, or as soon  thereafter
as the orders placed with it have been compiled, of the number of Shares and the
prices thereof which have been ordered through the Distributor  since the end of
the previous day.

             The right granted to the Distributor to place orders for Shares
with the Trust shall be exclusive,  except that said  exclusive  right shall not
apply to Shares  issued in the  event  that an  investment  company  (whether  a
regulated or private investment company or a personal holding
<PAGE>
company)  is merged or  consolidated  with the Trust (or a Fund) or in the event
that  the  Trust  (or a  Fund)  acquires  by  purchase  or  otherwise,  all  (or
substantially all) the assets or the outstanding shares of any such company; nor
shall it apply to Shares issued by the Trust (or a Fund) as a stock  dividend or
a stock split.  The  exclusive  right to place orders for Shares  granted to the
Distributor  may be waived by the Distributor by notice to the Trust in writing,
either  unconditionally  or subject to such conditions and limitations as may be
set forth in the notice to the Trust.  The Trust  hereby  acknowledges  that the
Distributor  may  render  distribution  and  other  services  to other  parties,
including other investment  companies.  In connection with its duties hereunder,
the  Distributor  shall also arrange for  computation of performance  statistics
with  respect  to the  Trust  and  arrange  for  publication  of  current  price
information in newspapers and other publications.

         2.  The Shares may be sold through the Distributor to dealers, banks
and other financial  institutions  having sales agreements with the Distributor,
upon the following terms and conditions:

             The public offering price, i.e., the price per Share at which the
Distributor or dealers, banks or other financial institutions  purchasing Shares
through  the  Distributor  may sell  Shares to the  public,  shall be the public
offering  price as set forth in the current  Prospectus  relating to the Shares,
including a sales charge (where  applicable) not to exceed the amount  permitted
by Article III,  Section 26 of the National  Association of Securities  Dealers,
Inc.'s Rules of Fair  Practice,  as amended from time to time.  The  Distributor
shall retain the sales charge (where  applicable) less any applicable  dealer or
comparable discount. If the resulting public offering price does not come out to
an even cent, the public offering price shall be adjusted to the nearer cent. In
addition,  the Trust agrees that the Distributor  may impose certain  contingent
deferred sales charges (where  applicable) in connection  with the redemption of
Shares,  not to exceed 6% of the net asset value of Shares,  and the Distributor
shall retain (or receive from the Trust, as the case may be) all such contingent
deferred sales charges.
<PAGE>

             The Distributor may place orders for Shares at the net asset value
for such Shares (as established pursuant to paragraph l above) on behalf of such
purchasers and under such  circumstances as the Prospectus  describes,  provided
that such sales comply with Rule 22d-1 under the Investment  Company Act of 1940
or any exemptive  order granted by the Securities and Exchange  Commission.  The
Distributor  may also place  orders  for Shares at net asset  value on behalf of
persons reinvesting the proceeds of the redemption or resale of Shares or shares
of other  investment  companies for which the Distributor acts as Distributor or
as otherwise provided in the current Prospectus.

             The net asset value of Shares shall be determined by the Trust or
by an agent of the  Trust,  as of the close of  regular  trading of the New York
Stock  Exchange  on each  business  day on  which  said  Exchange  is  open,  in
accordance  with  the  method  set  forth  in  the  governing   instruments  (as
hereinafter  defined) of the Trust. The Trust may also cause the net asset value
to be  determined in  substantially  the same manner or estimated in such manner
and as of such  other  hour or hours as may from time to time be agreed  upon in
writing by the Trust and Distributor.  The Trust shall have the right to suspend
the sale of Shares if,  because of some  extraordinary  condition,  the New York
Stock Exchange shall be closed, or if conditions obtaining during the hours when
the  Exchange is open render such  action  advisable,  or for any other  reasons
deemed adequate by the Trust.

         3.  The Trust agrees that it will, from time to time, take all
necessary  action  to  register  the  offering  and  sale of  Shares  under  the
Securities Act of l933, as amended (the "Act"),  and applicable state securities
laws.

             The Distributor shall be an independent contractor and neither the
Distributor nor any of its directors, officers or employees as such, is or shall
be an  employee of the Trust.  It is  understood  that  Trustees,  officers  and
shareholders of the Trust are or may become  interested in the  Distributor,  as
Directors, officers and employees, or otherwise and that Directors, officers and
employees of the Distributor are or may become similarly interested in the Trust
and  that  the  Distributor  may  be or  become  interested  in the  Trust  as a
shareholder or otherwise. The
<PAGE>
Distributor is responsible for its own conduct and the  employment,  control and
conduct of its agents and  employees  and for injury to such agents or employees
or to others  through its agents or  employees.  The  Distributor  assumes  full
responsibility for its agents and employees under applicable statutes and agrees
to pay all employer taxes thereunder.

         4.  The Distributor covenants and agrees that, in selling Shares, it
will use its best efforts in all respects duly to conform with the  requirements
of all state and federal  laws and the Rules of Fair  Practice  of the  National
Association  of Securities  Dealers,  Inc. (the "NASD")  relating to the sale of
Shares,  and will indemnify and hold harmless the Trust and each of its Trustees
and officers and each person,  if any, who controls the Trust within the meaning
of Section 15 of the Act, against any loss, liability, damages, claim or expense
(including the reasonable cost of  investigating  or defending any alleged loss,
liability,  damages,  claim or expense and  reasonable  counsel fees incurred in
connection  therewith),  arising by reason of any person's acquiring any Shares,
which may be based upon the Act or any other  statute or common  law, on account
of any wrongful act of the  Distributor  or any of its employees  (including any
failure to conform with any requirement of any state or federal law or the Rules
of Fair  Practice  of the NASD  relating to the sale of Shares) or on the ground
that the  registration  statement or Prospectus as from time to time amended and
supplemented,  includes an untrue statement of a material fact or omits to state
a material fact required to be stated  therein or necessary in order to make the
statements  therein not misleading,  unless any such act,  statement or omission
was made in reliance  upon  information  furnished to the  Distributor  by or on
behalf of the Trust; provided,  however, that in no case (i) is the indemnity of
the  Distributor in favor of any person  indemnified to be deemed to protect the
Trust or any such person  against any  liability  to which the Trust or any such
person would otherwise be subject by reason of willful misfeasance, bad faith or
gross  negligence in the performance of its or his duties or by reason of its or
his reckless  disregard of its obligations  and duties under this Agreement,  or
(ii) is the Distributor to be liable under its indemnity  agreement contained in
this  paragraph  with  respect to any claim made against the Trust or any person
indemnified  unless  the Trust or such  person,  as the case may be,  shall have
<PAGE>

notified the  Distributor in writing within a reasonable  time after the summons
or other first legal process giving information of the nature of the claim shall
have been  served upon the Trust or upon such person (or after the Trust or such
person shall have received notice of such service on any designated  agent), but
failure to notify the  Distributor  of any such claim  shall not relieve it from
any  liability  which it may have to the Trust or any person  against  whom such
action is brought otherwise than on account of its indemnity agreement contained
in this paragraph. The Distributor shall be entitled to participate,  at its own
expense, in the defense,  or, if it so elects, to assume the defense of any suit
brought to enforce any such liability,  but, if the Distributor elects to assume
the  defense,  such  defense  shall be  conducted  by  counsel  chosen by it and
satisfactory to the Trust, or to its officers or Trustees, or to any controlling
person or persons,  defendant or  defendants  in the suit. In the event that the
Distributor  elects to assume  the  defense  of any such  suit and  retain  such
counsel,  the  Trust or such  officers  or  Trustees  or  controlling  person or
persons,  defendant or defendants in the suit,  shall bear the fees and expenses
of any additional  counsel  retained by them, but, in case the Distributor  does
not elect to assume the defense of any such suit,  it shall  reimburse the Trust
and such officers and Trustees or  controlling  person or persons,  defendant or
defendants  in such suit,  for the  reasonable  fees and expenses of any counsel
retained by them.  The  Distributor  agrees  promptly to notify the Trust of the
commencement of any litigation or proceedings  against it in connection with the
issue and sale of any Shares.

             Neither the Distributor nor any other person is authorized to give
any information or to make any representation on behalf of the Trust, other than
those  contained  in the  registration  statement or  Prospectus  filed with the
Securities and Exchange Commission under the Act (as said registration statement
or Prospectus may be amended or  supplemented  from time to time),  covering the
Shares or other than those contained in periodic  reports to shareholders of the
Trust.

         5.  The Trust will pay, or cause to be paid -

             (i)   all costs and expenses of the Trust, including fees and
disbursements  of its counsel,  in connection with the preparation and filing of
any required registration  statement or
<PAGE>
Prospectus  under the Act covering  Shares and all  amendments  and  supplements
thereto and any notices regarding the registration of shares,  and preparing and
mailing to shareholders Prospectuses,  statements and confirmations and periodic
reports  (including  the  expense of  setting  up in type any such  registration
statement, Prospectus or periodic report);

             (ii)  the expenses (including auditing expenses) of qualification
of the Shares for sale, and, if necessary or advisable in connection  therewith,
of  qualifying  the  Trust as a dealer  or  broker,  in such  states as shall be
selected by the Distributor and the fees payable to each such state with respect
to  shares  sold  and  for  continuing  the  qualification   therein  until  the
Distributor  notifies  the  Trust  that  it does  not  wish  such  qualification
continued;

             (iii) the cost of preparing temporary or permanent certificates
for Shares;

             (iv)  all fees and disbursements of the transfer agent of the
Trust;

             (v)   the cost and expenses of delivering to the Distributor at its
office in Boston, Massachusetts, all Shares sold through it as Distributor
hereunder; and

             (vi)  all the federal and state issue and/or transfer taxes payable
upon the issue by or (in the case of treasury Shares) transfer from the Trust of
any and all Shares purchased through the Distributor hereunder.

             The Distributor agrees that, after the Prospectus and periodic
reports have been set up in type, it will bear the expense  (other than the cost
of mailing to shareholders of the Trust) of printing and distributing any copies
thereof  which  are to be used in  connection  with the  offering  of  Shares to
dealers,  banks or other financial  institutions  or investors.  The Distributor
further  agrees  that it will  bear the  expenses  of  preparing,  printing  and
distributing any other literature used by the Distributor or furnished by it for
use by dealers,  banks or other  financial  institutions  in connection with the
offering  of the Shares for sale to the public and  expenses of  advertising  in
connection  with such offering.  The  Distributor  will also bear the expense of
sending  confirmations  and  statements  to dealers,  banks and other  financial
institutions  having  sales  agreements  with the  Distributor.  Nothing in this
paragraph  5 shall be deemed to  prohibit  or  conflict  with any payment by the
Trust or any Fund to the Distributor  pursuant to any
<PAGE>
Distribution  Plan  adopted  as in  effect  pursuant  to Rule  12b-1  under  the
Investment Company Act of 1940.

         6.  The Trust hereby authorizes the Distributor to repurchase, upon the
terms and conditions set forth in written instructions given by the Trust to the
Distributor  from time to time, as agent of the Trust and for its account,  such
Shares  as may be  offered  for sale to the Trust  from time to time;  provided,
however, that the Distributor shall have the right, as stated above in paragraph
2 of this  Agreement,  to retain (or to receive from the Trust,  as the case may
be) a  deferred  sales  charge  not to exceed  6% of the net asset  value of the
Shares so repurchased.

             (a)   The Distributor shall notify in writing the Custodian of the
Trust, at the end of each business day, or as soon thereafter as the repurchases
have been compiled,  of the number of Shares  repurchased for the account of the
Trust since the last  previous  report,  together  with the prices at which such
repurchases  were made,  and upon the  request of any  Officer or Trustee of the
Trust shall furnish similar  information with respect to all repurchases made up
to the time of the request on any day.

             (b)   The Trust reserves the right to suspend or revoke the
foregoing   authorization  at  any  time.  Unless  otherwise  stated,  any  such
suspension or  revocation  shall be effective  forthwith  upon receipt of notice
thereof by an officer of the Distributor, by telegraph or by written notice from
the Trust.  In the event that the  authorization  of the  Distributor is, by the
terms of such notice, suspended for more than twenty-four hours or until further
notice, the authorization  given by this paragraph 6 shall not be revived except
by action of a majority of the members of the Board of Trustees of the Trust.

             (c)   The Distributor shall have the right to terminate the
operation  of this  paragraph 6 upon giving to the Trust  thirty  days'  written
notice thereof.

             (d)   The Trust agrees to authorize and direct the Custodian to
pay,  for the  account  of the  Trust,  the  purchase  price  of any  Shares  so
repurchased  against  delivery of the  certificates,  if any, in proper form for
transfer to the Trust or for cancellation by the Trust.
<PAGE>

             (e)   The Distributor shall receive no commission in respect of any
repurchase of Shares under the foregoing authorization and appointment as agent,
except in connection with  contingent  deferred sales charges as provided in the
current Prospectus relating to the Shares.

             (f)   The Trust agrees to reimburse the Distributor, from time to
time upon demand,  for any reasonable  expenses  incurred in connection with the
repurchase of Shares pursuant to this paragraph 6.

         7.  If, at any time during the existence of this Agreement, the Trust
shall deem it necessary or advisable in the best interests of the Trust that any
amendment to this Agreement be made in order to comply with the  recommendations
or requirements of the Securities and Exchange  Commission or other governmental
authority  or to  obtain  any  advantage  under  Massachusetts,  or any state or
federal tax laws, it shall notify the Distributor of the form of amendment which
it deems  necessary or advisable and the reasons  therefore.  If the Distributor
declines to assent to such  amendment,  the Trust may terminate  this  Agreement
forthwith by written notice to the  Distributor  without payment of any penalty.
If, at any time during the  existence  of this  Agreement,  upon  request by the
Distributor,  the Trust fails (after a  reasonable  time) to make any changes in
its  governing  instruments  or in its  methods  of  doing  business  which  are
necessary in order to comply with any  requirements  of federal or state laws or
regulations, laws or regulations of the Securities and Exchange Commission or of
a  national  securities  association  of which  the  Distributor  is or may be a
member,  relating to the sale of Shares,  the  Distributor  may  terminate  this
Agreement  forthwith  by  written  notice to the Trust  without  payment  of any
penalty.

         8.  The  Distributor  agrees  that it will  not  take any long or short
positions  in the  Shares  except as  permitted  by  paragraphs  l and 6 hereof.
Whenever used in this Agreement, the term "governing instruments" shall mean the
Declaration of Trust and the By-Laws of the Trust, as from time to time amended.

         9.  This Agreement shall become effective on September 1, 1995 and
shall  continue in force until  September 1, 1997 and each year  thereafter  but
only so long as its continuance is
<PAGE>
"specifically  approved at least  annually" (i) by the vote of a majority of the
Board of Trustees of the Trust who are not interested persons of the Trust or of
the  Distributor at a meeting  specifically  called for the purpose of voting on
such  approval,  and (ii) by the Board of  Trustees of the Trust or by vote of a
majority  of the  outstanding  voting  securities  of that Fund.  The  aforesaid
requirement  that  continuance  of this Agreement be  "specifically  approved at
least  annually"  shall be construed in a manner  consistent with the Investment
Company Act of l940 and the rules and regulations thereunder.

         This  Agreement  may be terminated as to any Fund at any time by either
party  without  payment of any penalty on not more than sixty days' or less than
thirty days' written notice to the other party.

         10. This Agreement shall automatically terminate in the event of its
assignment.

         11. The  terms  "vote  of  a  majority  of  the   outstanding   voting
securities",  "interested  person",  "assignment" and "specifically  approved at
least annually" shall have the respective  meanings  specified in the Investment
Company Act of l940 and the rules and regulations thereunder,  subject, however,
to such  exemptions as may be granted by the Securities and Exchange  Commission
under said Act.

         12. This Agreement shall be governed by the laws of The Commonwealth of
Massachusetts.  This Agreement supersedes and terminates, as of the date hereof,
the Distribution Agreement dated January 1, 1995 between MFS Government Mortgage
Fund and the Distributor.

         13. A copy of the Declaration of Trust of the Trust is on file with the
Secretary  of  State  of The  Commonwealth  of  Massachusetts.  The  Distributor
acknowledges  that the  obligations of or arising out of this instrument are not
binding  upon  any of the  Trust's  trustees,  officers,  employees,  agents  or
shareholders  individually,  but are binding solely upon the assets and property
of the Trust.  If this  instrument  is executed by the Trust on behalf of one or
more series of the Trust, the Distributor  further  acknowledges that the assets
and  liabilities  of each series of the Trust are separate and distinct and that
the obligations of or arising out of this instrument are
<PAGE>
binding  solely upon the assets or  property  of the series on whose  behalf the
Trust has executed this instrument. If the Trust has executed this instrument on
behalf of more than one series of the Trust,  the  Distributor  also agrees that
the  obligations  of each series  hereunder  shall be several and not joint,  in
accordance with its proportionate interest hereunder, and the Distributor agrees
not to proceed against any series for the obligations of another series.

         IN WITNESS WHEREOF,  the parties hereto have executed this Agreement as
of the day and year first above.

                                       MFS SERIES TRUST X

                                       On behalf of:
                                         MFS Government Mortgage Fund
                                         MFS/Foreign & Colonial Emerging Markets
                                           Equity Fund
                                         MFS/Foreign & Colonial International
                                           Growth and Income Fund
                                         MFS/Foreign & Colonial International
                                           Growth Fund


                                       By:     A. KEITH BRODKIN
                                               A. Keith Brodkin, as President
                                               and not individually



                                       MFS FUND DISTRIBUTORS, INC.


                                       By:     WILLIAM W. SCOTT, JR.
                                               William W. Scott, Jr.
                                               President

<PAGE>
                                                           EXHIBIT NO. 99.7

                       MFS GOVERNMENT INCOME PLUS TRUST

              RETIREMENT PLAN FOR NON-INTERESTED PERSON TRUSTEES



         MFS  Government   Income  Plus  Fund  (the  "Fund")  has  adopted  this
Retirement Plan for  Non-Interested  Person Trustees (the "Plan").  The Plan has
been  established  for the  purpose of  providing  certain  benefits to eligible
Independent Trustees of the Fund, or their  beneficiaries,  after termination of
the Independent Trustees' services as such.

         1.       DEFINITIONS

                  The following terms shall have the following meanings:

                  Accrued  Benefit:  A  benefit  which is  equal  to the  Normal
Retirement  Benefit  calculated using an Independent  Trustee's Years of Service
and Annual Compensation as of the determination date.

                  Actuarial  Equivalent:  A benefit equal in value, based on (a)
an interest  rate equal to the immediate  annuity rate  published by the Pension
Guaranty Corporation for the January of the Plan Year of calculation and (b) the
1983 Individual Annuity Mortality Tables for Males.

                  Annual  Compensation:  The  average of the total  compensation
(retainer and meeting fees)  received by an  Independent  Trustee during each of
the last three Plan Years  preceding  his  termination  of  services as such for
which he served either as an Independent Trustee or a Nonaffiliated  Trustee for
the  entire  year;  provided,  that  if  an  Independent  Trustee  served  as an
Independent  Trustee  and/or a  Nonaffiliated  Trustee for fewer than three full
Plan Years  prior to his  termination  of  services,  there  shall be taken into
account his annualized compensation for the one or more most recent partial Plan
Years (if any) for which he served as an Independent  Trustee or a Nonaffiliated
Trustee that, when  aggregated  with his full Plan Years,  does not exceed three
Plan Years.

                  Disability:  Disability as defined in ss.22(e)(3) of the
Internal Revenue Code of 1986, as amended.

                  Independent Trustee:  A Trustee of the Fund who is not an
"interested person" (as defined in Section 2(a)(19) of the Investment
Company Act of 1940, as amended) of the Fund, Lifetime Advisers, Inc.
("Lifetime"), Massachusetts Financial Services Company ("MFS") or MFS
Financial Services, Inc. ("FSI").
<PAGE>

                  Nonaffiliated  Trustee:  A  Trustee  of the  Fund  who  has no
material business or professional  relationship with the Fund, Lifetime,  MFS or
FSI and who is subject to being declared an "interested person" solely by reason
of his  relationship  with the Fund,  Lifetime,  MFS or FSI  during the two most
recently completed fiscal years of the Fund.

                  Normal  Retirement   Benefit:  An  annual  benefit  at  Normal
Retirement  Date equal to 5% of an  Independent  Trustee's  Annual  Compensation
multiplied by the Independent  Trustee's whole Years of Service, up to a maximum
of ten Years of Service,  payable in the Normal  Form of Benefit,  as defined in
ss.3(g).

                  Normal Retirement Date:  December 31 of the Plan Year in
which an Independent Trustee attains age 73.

                  Plan Year:  January 1 through December 31.

                  Retirement:  Termination of service of an Independent  Trustee
after having  completed  at least Five Years of Service and having  attained age
62, other than: (1) any termination by reason of death;  (ii) any termination by
reason of  Disability,  provided  that any  Independent  Trustee  who  suffers a
Disability and who has otherwise satisfied the requirements for Retirement shall
have the right to elect whether his termination is by reason of Retirement or by
reason of Disability;  or (iii) any  termination  resulting from the Independent
Trustee's willful misfeasance, bad faith, gross negligence or reckless disregard
of the duties  involved  in the  conduct of the  office of  Independent  Trustee
("Misconduct").

                  Year of  Service:  A Plan  Year  during  which an  Independent
Trustee  completed  at least six  months of  service  as either a  Nonaffiliated
Trustee or an Independent Trustee.

         2.       ELIGIBILITY

                  No Trustee of the Fund shall be eligible to participate in the
Plan or be  entitled  to any  rights or  benefits  hereunder  until the  Trustee
becomes an Independent Trustee.  Each individual who completes any service as an
Independent  Trustee on or after the  Effective  Date of this  Plan,  and who so
elects in such manner as the  Committee  determines  from time to time,  will be
eligible to participate in the Plan.

         3.       RETIREMENT DATE; AMOUNT OF BENEFIT

                  (a) Retirement.  Each Independent Trustee shall retire on that
Independent Trustee's Normal Retirement Date, if he has not previously ceased to
perform services as an Independent Trustee.  Each retired Independent Trustee is
referred to as a "Retired Trustee".
<PAGE>

                  (b) Normal Retirement Benefit.  Upon an Independent Trustee's
Retirement on his Normal Retirement Date, the Independent Trustee shall receive,
commencing on his Normal Retirement Date, his Normal Retirement Benefit.

                  (c) Early Retirement  Benefit.  Upon an Independent  Trustee's
Retirement prior to his Normal  Retirement  Date, the Independent  Trustee shall
receive an Early Retirement Benefit commencing on the Independent Trustee's date
of Retirement.  The benefit payable on an Independent Trustee's early Retirement
shall be his  Accrued  Benefit  reduced by 5% for every year that  payment of an
Early Retirement Benefit precedes that Trustee's Normal Retirement Date.

                  (d) Deferred Termination Benefit. If an Independent  Trustee's
service  as such  terminates,  other  than (i)  termination  as a result  of his
Misconduct or (ii)  termination  that  constitutes  termination by reason of his
Retirement,  Disability or death,  after he has completed at least five Years of
Service, he shall receive, commencing on the date he attains age 62, his Accrued
Benefit reduced by 55%.

                  (e) Disability Benefit. If an Independent Trustee's service as
such terminates by reason of his Disability  and, if the Independent  Trustee is
eligible for  Retirement,  he elects that his termination be treated as being by
reason of  Disability,  he shall  receive his Accrued  Benefit  paid for the one
hundred twenty (120) months immediately following the month in which his service
so terminates.  In the event the Independent Trustee dies before he has received
one hundred twenty (120) payments,  monthly payments in the same amount shall be
paid to his beneficiary until the number of payments to the Independent  Trustee
plus the number of payments to the  beneficiary  equal one hundred  twenty (120)
payments.

                  (f) Death  Benefit.  Each  Independent  Trustee  who elects to
participate  in this Plan  shall  designate  a  beneficiary  in such form as the
Committee  approves from time to time to receive any benefits payable under this
Plan in the event of his  death.  In the event  there is no  validly  designated
beneficiary  in existence on the date of an  Independent  Trustee's  death,  his
beneficiary shall be his surviving  spouse, if any, or if none, his estate.  The
beneficiary of an Independent Trustee who dies during service,  and with respect
to  whom  benefit  payments  have  not  commenced,  shall  be  entitled  to that
Independent  Trustee's  Accrued  Benefit  paid for the one hundred  twenty (120)
months immediately following death.

                  (g) Form of  Benefit.  Except as  otherwise  provided  in this
ss.3, benefits payable under this ss.3 shall be payable in the form of a monthly
annuity for the life of the Independent Trustee, and, if the Independent Trustee
dies before he has received one hundred twenty (120) payments,  monthly payments
in the same  amount  shall be  payable  to his  beneficiary  until the number of
payments  to  the
<PAGE>
Independent  Trustee  plus the number of payments to the  beneficiary  equal one
hundred  twenty  (120)  payments  (the  "Normal  Form  of  Benefit").   However,
notwithstanding  any other  provision of this Section 3 to the  contrary,  if an
Independent  Trustee's  beneficiary is entitled to payments under this Plan upon
the  Independent   Trustee's  death,  then  (i)  if  the  Independent  Trustee's
beneficiary is his estate,  the lump sum Actuarial  Equivalent  present value of
those  payments  shall be paid to the  estate  in a  single  lump sum as soon as
administratively  reasonable following the Independent Trustee's death, and (ii)
if the Independent Trustee's beneficiary is other than his estate, the Committee
in its sole discretion may direct that the Actuarial  Equivalent  value of those
payments be paid in such form other than the Normal  Form of Benefit  (including
without limitation a lump sum) as it determines.

         4.       PAYMENT OF BENEFIT; ALLOCATION OF COSTS

                  The Fund is  responsible  for the payment of the benefits,  as
well as all expenses of administration of the Plan, including without limitation
all  accounting,  legal and actuarial fees and expenses.  The obligations of the
Fund to pay such  benefits  and  expenses  will not be  secured or funded in any
manner,  and the obligations will not have any preference over the lawful claims
of the Fund's creditors and shareholders.  The Fund shall be under no obligation
to  segregate  any  assets  for the  purpose of  providing  retirement  benefits
pursuant  to this  Plan,  and to the  extent  that any  Independent  Trustee  or
beneficiary  acquires  a right to receive a benefit  under the Plan,  such right
shall be limited to that of a recipient of an unfunded, unsecured promise to pay
amounts in the future and such  person's  position  with respect to such amounts
shall be that of a general  unsecured  creditor of the Fund.  To the extent that
the Fund consists of one or more separate portfolios, costs and expenses will be
allocated  among  the  portfolios  by the  Board of  Trustees  of the Fund  (the
"Board") in a manner that is  determined  by the Board to be fair and  equitable
under the circumstances.

         5.       ADMINISTRATION

                  (a) The  Committee.  Any  question  involving  entitlement  to
payments  under or the  interpretation  or  administration  of the Plan  will be
referred to a committee (the "Committee") of Independent  Trustees designated by
the Board.  Except as otherwise  provided  herein,  the Committee  will make all
interpretations  and  determinations  necessary  or  desirable  for  the  Plan's
administration,  and such  interpretations  and determinations will be final and
conclusive.

                  (b) Powers of the Committee.  The Committee will represent and
act on  behalf of the Fund in  respect  of the Plan  and,  subject  to the other
provisions  of the Plan,  the Committee  may adopt,  amend or repeal  by-laws or
other  regulations,  relating to the  administration of the Plan, the conduct of
the  Committee's  affairs,  its  rights or powers or the rights or powers of its
members or of the
<PAGE>
Board.  The  Committee  will  report  to the  Board  from  time  to  time on its
activities  in respect of the Plan.  The  Committee or persons  designated by it
will cause such records to be kept as may be necessary for the administration of
the Plan.

         6.       MISCELLANEOUS PROVISIONS

                  (a) Rights Not Assignable.  The right to receive any payment
under the Plan may not be transferred, assigned, pledged or otherwise alienated.

                  (b) Amendment, etc. The Committee, with the concurrence of the
Board, may at any time amend or terminate the Plan or waive any provision of the
Plan,  provided that no amendment,  termination or waiver will impair the rights
of an  Independent  Trustee to receive upon  Retirement the payments which would
have been made to that  Independent  Trustee  had there been no such  amendment,
termination or waiver (based upon that Independent Trustee's Years of Service to
the date of such  amendment,  termination  or  waiver) or the rights of a former
Independent  Trustee or Retired  Trustee to receive  any  benefit  due under the
Plan,  without  the  consent of such  present or former  Independent  Trustee or
Retired Trustee,  as the case may be. A present or former Independent Trustee or
Retired  Trustee may elect to waive  receipt of his  benefit by so advising  the
Committee.

                           Notwithstanding any provision of this Plan to the
contrary,  however,  in the event of the sale of all or substantially all of the
assets of the Fund, the liquidation or dissolution of the Fund, or any merger or
other similar reorganization of the Fund that the Fund does not survive:

                           (i)      if although the Fund does not survive
there  is a  surviving  entity,  all  rights  and  benefits  (including  without
limitation  those  of  Retired   Trustees)  under  the  Plan  shall  cease  upon
consummation of such transaction, unless, and only to the extent that, the board
of trustees (or other similar  governing body) of the surviving entity agrees to
assume the Plan and/or to provide any such rights or benefits; and

                           (ii)     if there is no surviving entity, the
Board shall have the right to take specific  action to terminate the Plan and/or
to cause any or all rights and benefits  (including  without limitation those of
Retired  Trustees)  under the Plan to cease as of the date of such event but, in
the  absence of any such  specific  action,  the lump sum  Actuarial  Equivalent
present  value of the  Accrued  Benefit of each  present  or former  Independent
Trustee  or  Retired  Trustee  (or  beneficiary  thereof)  who  on the  date  of
liquidation  is  receiving  or entitled  to receive a benefit  under the Plan or
would be  entitled  to  receive a benefit  under the Plan based on his actual or
deemed
<PAGE>
termination of service as of the date of such liquidation  shall be paid to such
person.

                  (c) No Right to Re-election.  Nothing in the Plan will create
any obligation on the part of the Board to nominate any Independent  Trustee for
re-election.

                  (d)  Vacancies.  Although  the Board will  retain the right to
increase or decrease  its size,  it shall be the general  policy of the Board to
replace each person who ceases to serve as an Independent Trustee by selecting a
new Independent Trustee from candidates duly proposed.

                  (e) Consulting.  Each Retired Trustee may render such services
for the Fund, for such compensation,  as may be agreed upon from time to time by
such Trustee and the Board of the Fund.

                  (f) Construction.  Whenever any masculine  terminology is used
in this Plan,  it shall be taken to include  the  feminine,  unless the  context
otherwise indicates. The titles and headings included herein are for convenience
only and shall not be construed as in any way affecting or modifying the text of
this Plan, which text shall control.  This Plan shall be construed and regulated
in accordance with the laws of The Commonwealth of Massachusetts,  except to the
extent such state law is preempted by federal law.

                  (g) Effective Date.  This Plan will become effective on
January 1, 1991 (the "Effective Date").

<PAGE>
                                                       EXHIBIT NO. 99.8(a)


















                               CUSTODIAN CONTRACT

                                     BETWEEN

                   MFS GOVERNMENT SECURITIES HIGH YIELD TRUST

                                       AND

                       STATE STREET BANK AND TRUST COMPANY

<PAGE>

                                TABLE OF CONTENTS

                                                                          PAGE

1.    Employment of Custodian and Property to be Held By It..............   1

2.    Duties of the Custodian with Respect to Property of the Trust
      Held by the Custodian..............................................   1

      2.1       Holding Securities.......................................   1
      2.2       Delivery of Securities...................................   2
      2.3       Registration of Securities...............................   5
      2.4       Bank Accounts............................................   5
      2.5       Payments for Shares......................................   5
      2.6       Investment and Availability of Federal Funds.............   6
      2.7       Collection of Income.....................................   6
      2.8       Payment of Trust Monies..................................   7
      2.9       Liability for Payment in Advance of Receipt of
                Securities Purchased.....................................   8
      2.10      Payments for Repurchases or Redemptions of Shares of 
                the Trust................................................   8
      2.11      Appointment of Agents....................................   9
      2.12      Deposit of Trust Assets in Securities System.............   9
      2.13      Segregated Account.......................................  11
      2.14      Ownership Certificates for Tax Purposes..................  12
      2.15      Proxies..................................................  12
      2.16      Communications Relating to Trust Portfolio Securities....  12
      2.17      Proper Instructions......................................  13
      2.18      Actions Permitted Without Express Authority..............  13
      2.19      Evidence of Authority....................................  13

3.    Duties of Custodian with Respect to the Books of Account and
      Calculation of Net Asset Value and Net Income......................  14

4.    Records............................................................  14

5.    Opinion of Trust's Independent Accountants ........................  15

6.    Reports to Trust by Independent Public Accountants.................  15

7.    Compensation of Custodian..........................................  15

8.    Responsibility of Custodian........................................  15

9.    Effective Period, Termination and Amendment........................  16

10.   Successor Custodian................................................  17

11.   Interpretive and Additional Provisions.............................  18

12.   Massachusetts Law to Apply.........................................  19

13.   Prior Contracts....................................................  19


<PAGE>


                               CUSTODIAN CONTRACT



         This Contract  between MFS  Government  Securities  High Yield Trust, a
business  trust  organized and existing  under the laws of The  Commonwealth  of
Massachusetts,  having its principal  place of business at 200 Berkeley  Street,
Boston,  Massachusetts hereinafter called the "Trust", and State Street Bank and
Trust Company,  a  Massachusetts  trust company,  having its principal  place of
business at 225  Franklin  Street,  Boston,  Massachusetts,  02110,  hereinafter
called the "Custodian,"

         WITNESSETH,   that  in   consideration  of  the  mutual  covenants  and
agreements hereinafter contained, the parties hereto agree as follows:

1.       Employment of Custodian and Property to be Held by It

         The Trust hereby  employs the  Custodian as the custodian of its assets
pursuant to the  provisions  of the  Declaration  of Trust.  The Trust agrees to
deliver to the Custodian all  securities  and cash owned by it, and all payments
of income,  payments of principal or capital  distributions  received by it with
respect to all  securities  owned by the Trust  from time to time,  and the cash
consideration  received  by it for such new or  treasury  shares  of  beneficial
interest ("Shares") of the Trust as may be issued or sold from time to time. The
Custodian  shall  not be  responsible  for any  property  of the  Trust  held or
received by the Trust and not delivered to the Custodian.

         Upon  receipt of "Proper  Instructions"  (within the meaning of Section
2.17),  the Custodian shall from time to time employ one or more  subcustodians,
but only in accordance  with an applicable  vote by the Board of Trustees of the
Trust, and provided that the Custodian shall have no more or less responsibility
or  liability  to the  Trust on  account  of any  actions  or  omissions  of any
subcustodian so employed than any such subcustodian has to the Custodian.

2.       Duties of the Custodian with Respect to Property of the Trust Held By
the Custodian

2.1      Holding Securities. The Custodian shall hold and physically segregate
for the account of the Trust all non-cash  property,  including  all  securities
owned by the Trust,  other than  securities  which are  maintained  pursuant  to
Section 2.12 in a clearing agency which acts
<PAGE>
as a securities  depository  or in a book-entry  system  authorized  by the U.S.
Department  of the  Treasury,  collectively  referred to herein as a "Securities
System."

2.2      Delivery of Securities. The Custodian shall release and deliver
securities  owned by the Trust held by the  Custodian or in a Securities  System
account of the Custodian only upon receipt of Proper Instructions,  which may be
continuing  instructions when deemed appropriate by the parties, and only in the
following cases:

         1)  Upon sale of such securities for the account of the Trust and
receipt of payment therefor;

         2)  Upon the receipt of payment in connection with any repurchase
agreement related to such securities entered into by the Trust;

         3)  In the case of a sale effected through a Securities System, in
accordance with the provisions of Section 2.12 hereof;

         4)  To the depository agent in connection with tender or other similar
offers for portfolio securities of the Trust;

         5)  To the issuer thereof or its agent when such securities are called,
redeemed,  retired or otherwise become payable; provided that, in any such case,
the cash or other consideration is to be delivered to the Custodian;

         6)  To the issuer thereof, or its agent, for transfer into the name of
the Trust or into the name of any nominee or nominees of the  Custodian  or into
the name or nominee name of any agent appointed pursuant to Section 2.11 or into
the name or nominee name of any subcustodian appointed pursuant to Article l; or
for exchange for a different  number of bonds,  certificates  or other  evidence
representing  the same aggregate face amount or number of units;  provided that,
in any such case, the new securities are to be delivered to the Custodian;

         7)  Upon the sale of such securities for the account of the Trust, to
the  broker  or its  clearing  agent,  against a  receipt,  for  examination  in
accordance with
<PAGE>

"street  delivery"  custom;  provided that in any such case, the Custodian shall
have no  responsibility  or liability  for any loss arising from the delivery of
such securities  prior to receiving  payment for such  securities  except as may
arise from the Custodian's own negligence or willful misconduct;

         8)  For exchange or conversion pursuant to any plan of merger, 
consolidation,   recapitalization,   reorganization   or   readjustment  of  the
securities  of the issuer of such  securities,  or  pursuant to  provisions  for
conversion  contained in such securities,  or pursuant to any deposit agreement;
provided  that, in any such case, the new securities and cash, if any, are to be
delivered to the Custodian;

         9)  In the case of warrants, rights or similar securities, the
surrender thereof in the exercise of such warrants, rights or similar securities
or the  surrender of interim  receipts or temporary  securities  for  definitive
securities;  provided  that, in any such case,  the new  securities and cash, if
any, are to be delivered to the Custodian;

         10) For delivery in connection with any loans of securities made by the
Trust, but only against receipt of adequate  collateral as agreed upon from time
to time by the  Custodian  and the  Trust,  which  may be in the form of cash or
obligations   issued  by  the  United   States   government,   its  agencies  or
instrumentalities, except that in connection with any loans for which collateral
is to be credited to the Custodian's account in the book-entry system authorized
by the U.S. Department of the Treasury, the Custodian will not be held liable or
responsible  for the  delivery  of  securities  owned by the Trust  prior to the
receipt of such collateral;

         11) For delivery as security in connection with any borrowings by the
Trust  requiring a pledge of assets by the Trust,  but only  against  receipt of
amounts borrowed;
<PAGE>

         12) For delivery in accordance with the provisions of any agreement
among  the  Trust,  the  Custodian  and a  broker-dealer  registered  under  the
Securities  Exchange  Act of 1934  (the  "Exchange  Act")  and a  member  of The
National  Association  of  Securities  Dealers,   Inc.  ("NASD"),   relating  to
compliance  with  the  rules  of The  Options  Clearing  Corporation  and of any
registered  national  securities  exchange,  or of any similar  organization  or
organizations,  regarding  escrow  or  other  arrangements  in  connection  with
transactions by the Trust;

         13) For delivery in accordance with the provisions of any agreement
among the Trust, the Custodian,  and a Futures  Commission  Merchant  registered
under the Commodity  Exchange Act,  relating to compliance with the rules of the
Commodity Futures Trading  Commission and/or any Contract Market, or any similar
organization or  organizations,  regarding  account  deposits in connection with
transactions by the Trust;

         14) Upon receipt of instructions from the transfer agent ("Transfer
Agent") for the Trust,  for delivery to such Transfer Agent or to the holders of
shares in connection with  distributions  in kind, as may be described from time
to  time  in  the  Trust's  currently  effective  prospectus  and  statement  of
additional information ("prospectus"), in satisfaction of requests by holders of
Shares for repurchase or redemption; and

         15) For any other proper corporate purpose, but only upon receipt of,
in addition to Proper  Instructions,  a certified  copy of a  resolution  of the
Board of  Trustees  or of the  Executive  Committee  signed by an officer of the
Trust and  certified by the Secretary or an Assistant  Secretary,  setting forth
the purpose for which such delivery is to be made,  declaring such purpose to be
a proper corporate purpose, and naming the person or persons to whom delivery of
such securities shall be made.
<PAGE>

2.3      Registration of Securities. Securities held by the Custodian (other
than bearer  securities)  shall be registered in the name of the Trust or in the
name of any  nominee  of the  Trust or of any  nominee  of the  Custodian  which
nominee  shall be  assigned  exclusively  to the  Trust,  unless  the  Trust has
authorized  in writing  the  appointment  of a nominee to be used in common with
other registered  investment companies having the same investment adviser as the
Trust, or in the name or nominee name of any agent appointed pursuant to Section
2.11 or in the name or nominee name of any  subcustodian  appointed  pursuant to
Article 1. All securities accepted by the Custodian on behalf of the Trust under
the terms of this  Contract  shall be in "street  name" or other  good  delivery
form.

2.4      Bank Accounts. The Custodian shall open and maintain a separate bank
account or  accounts  (the  "Trust's  Account or  Accounts")  in the name of the
Trust,  subject only to draft or order by the Custodian  acting  pursuant to the
terms of this Contract,  and shall hold in such Account or Accounts,  subject to
the  provisions  hereof,  all cash received by it from or for the account of the
Trust, other than cash maintained by the Trust in a bank Account established and
used in  accordance  with Rule 17f-3 under the  Investment  Company Act of 1940.
Funds held by the  Custodian  for the Trust may be deposited by it to its credit
as Custodian in the Banking  Department  of the Custodian or in such other banks
or trust  companies as it may in its  discretion  deem  necessary or  desirable;
provided,  however,  that every such bank or trust company shall be qualified to
act as a custodian  under the Investment  Company Act of 1940 and that each such
bank or trust company and the funds to be deposited with each such bank or trust
company  shall be  approved  by vote of majority of the Board of Trustees of the
Trust.  Such funds  shall be  deposited  by the  Custodian  in its  capacity  as
Custodian and shall be withdrawable by the Custodian only in that capacity.

2.5      Payments for Shares. The Custodian shall receive from the distributor
for the Trust's  Shares or from the Transfer Agent of the Trust and deposit into
the Trust's Account such payments as are received for Shares of the Trust issued
or sold from time to time by the
<PAGE>
Trust.  The  Custodian  will provide  timely  notification  to the Trust and the
Transfer Agent of any receipt by it of payments for Shares of the Trust.

2.6      Investment and Availability of Federal Funds.  Upon mutual agreement
between the Trust and the Custodian, the Custodian shall, upon the receipt of
Proper Instructions,

         1)  invest in such instruments as may be set forth in such
instruments as may be set forth in such instructions on the same day as
received all federal funds received after a time agreed upon between the
Custodian and the Trust; and

         2)  make federal funds available to the Trust as of specified
times agreed upon from time to time by the Trust and the Custodian in the amount
of any checks  received in payment  for Shares of the Trust which are  deposited
into the Trust's account.

2.7      Collection of Income. The Custodian shall collect on a timely basis all
income and other payments with respect to registered  securities  held hereunder
to which the Trust shall be entitled  either by law or pursuant to custom in the
securities  business,  and shall  collect on a timely basis all income and other
payments  with  respect to bearer  securities  if, on the date of payment by the
issuer, such securities are held by the Custodian or its agent thereof and shall
credit such income,  as collected,  to the Trust's  custodian  account.  Without
limiting the generality of the foregoing, the Custodian shall detach and present
for payment all coupons and other income  items  requiring  presentation  as and
when they become due and shall  collect  interest  when due on  securities  held
hereunder.  Income due the Trust on securities loaned pursuant to the provisions
of Section 2.2 (10) shall be the responsibility of the Trust. The Custodian will
have no duty or  responsibility in connection  therewith,  other than to provide
the Trust with such  information or data as may be necessary to assist the Trust
in arranging for the timely delivery to the Custodian of the income to which the
Trust is properly entitled.
<PAGE>

2.8     Payment of Trust Monies.  Upon receipt of Proper Instructions, which may
continuing instructions when deemed appropriate by the parties, the Custodian
shall pay out monies of the Trust in the following cases only:

         1)  Upon the purchase of securities, for the account of the Trust but
only (a) against the delivery of such  securities to the Custodian (or any bank,
banking  firm or trust  company  doing  business in the United  States or abroad
which is qualified under the Investment Company Act of 1940, as amended,  to act
as a custodian  and has been  designated  by the Custodian as its agent for this
purpose)  registered in the name of the Trust or in the name of a nominee of the
Custodian referred to in Section 2.3 hereof or in proper form for transfer;  (b)
in the case of a purchase  effected through a Securities  System,  in accordance
with the  conditions  set forth in Section  2.12  hereof;  or (c) in the case of
repurchase  agreements  entered  into  between the Trust and the  Custodian,  or
another bank, or a broker-dealer which is a member of NASD, (i) against delivery
of the securities  either in certificate  form or through an entry crediting the
Custodian's  account at the Federal  Reserve Bank with such  securities  or (ii)
against delivery of the receipt  evidencing  purchase by the Trust of securities
owned by the  Custodian  along with  written  evidence of the  agreement  by the
Custodian to repurchase such securities from the Trust;

         2)  In connection with conversion, exchange or surrender of securities
owned by the Trust as set forth in Section 2.2 hereof;

         3)  For the redemption or repurchase of Shares issued by the Trust as
set forth in Section 2.10 hereof;

         4)  For the payment of any expense or liability incurred by the Trust,
including  but not  limited to the  following  payments  for the  account of the
Trust: interest, taxes, management,  accounting,  transfer agent and legal fees,
and operating
<PAGE>
expenses of the Trust  whether or not such  expenses  are to be in whole or part
capitalized or treated as deferred expenses;

         5)  For the payment of any dividends declared pursuant to the governing
documents of the Trust;

         6)  For payment of the amount of dividends received in respect of
securities sold short;

         7)  For any other proper purpose, but only upon receipt of, in addition
to  Proper  Instructions,  a  certified  copy of a  resolution  of the  Board of
Trustees or of the Executive  Committee of the Trust signed by an officer of the
Trust and  certified by its Secretary or an Assistant  Secretary,  setting forth
the purpose for which such payment is to be made, declaring such purpose to be a
proper  purpose,  and naming the person or persons to whom such payment is to be
made.

2.9      Liability for Payment in Advance of Receipt of Securities Purchased.
In any and every case where payment for purchase of  securities  for the account
of the Trust is made by the  Custodian  in advance of receipt of the  securities
purchased in the absence of specific written  instructions  from the Trust to so
pay in advance,  the Custodian shall be absolutely  liable to the Trust for such
securities  to the same  extent as if the  securities  had been  received by the
Custodian,  except that in the case of repurchase agreements entered into by the
Trust with a bank which is a member of the Federal Reserve System, the Custodian
may  transfer  funds to the account of such bank prior to the receipt of written
evidence that the securities  subject to such  repurchase  agreements  have been
transferred  by  book-entry  into a  segregated  non-proprietary  account of the
Custodian  maintained  with  the  Federal  Reserve  Bank  of  Boston  or of  the
safekeeping  receipt,  provided  that  such  securities  have  in  fact  been so
transferred by book-entry.

2.10     Payments for Repurchases or Redemptions of Shares of the Trust.  From
such funds as may be available for the purpose but subject to the limitations of
the  Declaration of Trust and any  applicable  votes of the Board of Trustees of
the Trust pursuant thereto, the
<PAGE>

Custodian  shall,  upon receipt of instructions  from the Transfer  Agent,  make
funds  available  for  payment to holders  of Shares who have  delivered  to the
Transfer  Agent a request for  redemption  or  repurchase  of their  Shares.  In
connection  with the  redemption  or  repurchase  of  Shares of the  Trust,  the
Custodian is authorized upon receipt of instructions  from the Transfer Agent to
wire  funds  to or  through  a  commercial  bank  designated  by  the  redeeming
shareholders.  In connection  with the redemption or repurchase of Shares of the
Trust,  the  Custodian  shall honor checks drawn on the Custodian by a holder of
Shares,  which checks have been  furnished by the Trust to the holder of Shares,
when presented to the Custodian in accordance  with such procedures and controls
as are  mutually  agreed  upon  from  time to time  between  the  Trust  and the
Custodian.

2.11     Appointment of Agents. The Custodian  may at any  time or times in its
discretion  appoint (and may at any time remove) any other bank or trust company
which is itself qualified under the Investment  Company Act of 1940, as amended,
to act as a custodian,  as its agent to carry out such of the provisions of this
Article 2 as the Custodian may from time to time direct; provided, however, that
the   appointment   of  any  agent  shall  not  relieve  the  Custodian  of  its
responsibilities or liabilities hereunder.

2.12     Deposit of Trust Assets in Securities Systems. The Custodian may
deposit  and/or  maintain  securities  owned by the Trust in a  clearing  agency
registered with the Securities and Exchange  Commission under Section 17A of the
Securities  Exchange Act of 1934, which acts as a securities  depository,  or in
the  book-entry  system  authorized  by the U.S.  Department of the Treasury and
certain federal agencies, collectively referred to herein as "Securities System"
in accordance with applicable  Federal Reserve Board and Securities and Exchange
Commission  rules  and  regulations,  if  any,  and  subject  to  the  following
provisions:

         1)  The Custodian may keep securities of the Trust in a Securities
System provided that such securities are represented in an account ("Custodian's
Account") of the
<PAGE>
Custodian  in the  Securities  System  which shall not include any assets of the
Custodian  other than assets held as a fiduciary,  custodian  or  otherwise  for
customers;

         2)  The records of the Custodian with respect to securities of the
Trust which are  maintained in a Securities  System shall identify by book-entry
those securities belonging to the Trust;

         3)  The Custodian shall pay for securities purchased for the account of
the Trust  upon (i)  receipt  of advice  from the  Securities  System  that such
securities have been transferred to the Custodian's Account, and (ii) the making
of an entry on the records of the Custodian to reflect such payment and transfer
for the account of the Trust.  The Custodian shall transfer  securities sold for
the account of the Trust upon (i) receipt of advice from the  Securities  System
that  payment  for such  securities  has  been  transferred  to the  Custodian's
Account,  and (ii) the  making of an entry on the  records of the  Custodian  to
reflect such  transfer  and payment for the account of the Trust.  Copies of all
advices from the Securities System of transfers of securities for the account of
the Trust shall identify the Trust, be maintained for the Trust by the Custodian
and be provided to the Trust at its request.  Upon request,  the Custodian shall
furnish the Trust  confirmation  of each  transfer to or from the account of the
Trust in the form of a written  advice or notice and shall  furnish to the Trust
copies of daily  transaction  sheets  reflecting each day's  transactions in the
Securities System for the account of the Trust.

         4)  The Custodian shall provide the Trust with any report obtained by
the Custodian on the Securities System's accounting system,  internal accounting
control and procedures for safeguarding  securities  deposited in the Securities
System;

         5)  The Custodian shall have received the initial or annual
certificate, as the case may be, required by Article 9 hereof;
<PAGE>

         6)  Anything to the contrary in this Contract notwithstanding, the
Custodian  shall be  liable  to the  Trust  for any loss or  damage to the Trust
resulting  from  use of the  Securities  System  by  reason  of any  negligence,
misfeasance or misconduct of the Custodian or any of its agents or of any of its
or their employees or from failure of the Custodian or any such agent to enforce
effectively  such rights as it may have against the  Securities  System;  at the
election of the Trust,  it shall be entitled to be  subrogated  to the rights of
the  Custodian  with respect to any claim against the  Securities  System or any
other person which the Custodian  may have as a consequence  of any such loss or
damage if and to the extent  that the Trust has not been made whole for any such
loss or damage.

2.13     Segregated Account. The Custodian shall upon receipt of Proper
Instructions  establish and maintain a segregated account or accounts for and on
behalf of the Trust,  into which  account or accounts  may be  transferred  cash
and/or  securities,  including  securities  maintained  in  an  account  by  the
Custodian pursuant to Section 2.12 hereof, (i) in accordance with the provisions
of any agreement among the Trust,  the Custodian and a broker-dealer  registered
under  the  Exchange  Act and a member  of the NASD (or any  futures  commission
merchant  registered under the Commodity  Exchange Act),  relating to compliance
with  the  rules  of The  Options  Clearing  Corporation  and of any  registered
national securities exchange (or the Commodity Futures Trading Commission or any
registered  contract market),  or of any similar  organization or organizations,
regarding  escrow or other  arrangements in connection with  transactions by the
Trust,  (ii) for  purposes  of  segregating  cash or  government  securities  in
connection  with  options  purchased,  sold or written by the Trust or commodity
futures contracts or options thereon  purchased or sold by the Trust,  (iii) for
the  purpose  of  compliance  by the  Trust  with  the  procedures  required  by
Investment  Company Act Release No. 10666, or any subsequent release or releases
of the  Securities  and  Exchange  Commission  relating  to the  maintenance  of
segregated accounts by registered investment companies and (iv) for
<PAGE>
other proper  corporate  purposes,  but only,  in the case of clause (iv),  upon
receipt of, in addition to Proper Instructions, a certified copy of a resolution
of the Board of Trustees or of the Executive  Committee  signed by an officer of
the Trust and  certified by the  Secretary or an  Assistant  Secretary,  setting
forth the purpose or  purposes of such  segregated  account and  declaring  such
purposes to be proper corporate purposes.

2.14     Ownership Certificates for Tax Purposes. The Custodian  shall execute
ownership and other  certificates  and  affidavits for all federal and state tax
purposes in connection  with receipt of income or other payments with respect to
securities  of the  Trust  held  by it  and  in  connection  with  transfers  of
securities.

2.15     Proxies. The Custodian shall, with  respect  to  the  securities  held
hereunder,  cause to be  promptly  executed  by the  registered  holder  of such
securities,  if the securities are registered  otherwise than in the name of the
Trust or a nominee of the Trust, all proxies,  without  indication of the manner
in which such proxies are to be voted,  and shall promptly  deliver to the Trust
such proxies,  all proxy  soliciting  materials and all notices relating to such
securities.

2.16     Communications Relating to Trust Portfolio Securities.  The Custodian
shall transmit promptly to the Trust all written information (including, without
limitation,  pendency of calls and maturities of securities  and  expirations of
rights in  connection  therewith and notices of exercise of call and put options
written by the Trust and the maturity of futures contracts  purchased or sold by
the Trust)  received by the Custodian from issuers of the securities  being held
for the Trust.  With respect to tender or exchange  offers,  the Custodian shall
transmit promptly to the Trust all written information received by the Custodian
from issuers of the  securities  whose tender or exchange is sought and from the
party (or his agents) making the tender or exchange  offer. If the Trust desires
to take action with  respect to any tender  offer,  exchange  offer or any other
similar  transaction,  the Trust  shall  notify  the  Custodian  at least  three
business days prior to the date on which the Custodian is to take such action.
<PAGE>

2.17     Proper Instructions. Proper Instructions as used throughout this
Article 2 means a writing  signed or initialled by one or more person or persons
as the Board of  Trustees  shall  have from time to time  authorized.  Each such
writing  shall  set  forth  the  specific  transaction  or type  of  transaction
involved, including a specific statement of the purpose for which such action is
requested.  Oral  instructions  will be considered  Proper  Instructions  if the
Custodian  reasonably believes them to have been given by a person authorized to
give such instructions with respect to the transaction involved. The Trust shall
cause all oral  instructions  to be  confirmed  in  writing.  Upon  receipt of a
certificate of the Secretary or an Assistant  Secretary as to the  authorization
by the Board of Trustees of the Trust  accompanied by a detailed  description of
procedures  approved by the Board of Trustees,  Proper  Instructions may include
communications  effected  directly  between   electro-mechanical  or  electronic
devices provided that the Board of Trustees and the Custodian are satisfied that
such procedures afford adequate safeguards for the Trust's assets.

2.18     Actions Permitted without Express Authority.  The Custodian may in its
discretion, without express authority from the Trust:

         1)  make payments to itself or others for minor expenses of handling
securities or other similar  items  relating to its duties under this  Contract,
provided that all such payments shall be accounted for to the Trust;

         2)  surrender securities in temporary form for securities in definitive
form;

         3)  endorse for collection, in the name of the Trust, checks, drafts
and other negotiable instruments; and

         4)  in general, attend to all non-discretionary details in connection
with the sale,  exchange,  substitution,  purchase,  transfer and other dealings
with the  securities  and property of the Trust except as otherwise  directed by
the Board of Trustees of the Trust.

2.19     Evidence of Authority.  The Custodian shall be protected in acting upon
any instructions,  notice, request, consent,  certificate or other instrument or
paper believed by it to be
<PAGE>
genuine and to have been  properly  executed  by or on behalf of the Trust.  The
Custodian  may  receive  and accept a  certified  copy of a vote of the Board of
Trustees of the Trust as conclusive  evidence (a) of the authority of any person
to act in accordance with such vote or (b) of any determination or of any action
by the Board of Trustees  pursuant to the  Declaration  of Trust as described in
such vote,  and such vote may be  considered  as in full force and effect  until
receipt by the Custodian of written notice to the contrary.

3.       Duties of Custodian with Respect to the Books of Account and
Calculation of Net Asset Value and Net Income

         The Custodian shall cooperate with and supply necessary information to
the entity or entities  appointed  by the Board of Trustees of the Trust to keep
the books of account of the Trust  and/or  compute the net asset value per share
of the  outstanding  shares of the Trust or, if  directed in writing to do so by
the Trust, shall itself keep such books of account and/or compute such net asset
value per share.  If so directed,  the Custodian  shall also calculate daily the
net  income  of the  Trust  as  described  in the  Trust's  currently  effective
prospectus  and shall advise the Trust and the Transfer Agent daily of the total
amounts of such net income  and, if  instructed  in writing by an officer of the
Trust to do so, shall advise the Transfer Agent  periodically of the division of
such net income among its various components.  The calculations of the net asset
value per share and the daily  income of the Trust  shall be made at the time or
times described from time to time in the Trust's currently effective prospectus.

4.       Records

         The Custodian shall create and  maintain all records  relating to its
activities and  obligations  under this Contract in such manner as will meet the
obligations  of the  Trust  under  the  Investment  Company  Act of  1940,  with
particular attention to Section 31 thereof and Rules 31a-1 and 31a-2 thereunder,
applicable federal and state tax laws and any other law or administrative  rules
or procedures  which may be  applicable to the Trust.  All such records shall be
the  property of the Trust and shall at all times  during the  regular  business
hours of the  Custodian  be open for  inspection  by duly  authorized  officers,
employees or agents of the Trust and employees and
<PAGE>
agents of the Securities and Exchange  Commission.  The Custodian  shall, at the
Trust's  request,  supply the Trust with a tabulation of securities owned by the
Trust and held by the Custodian and shall,  when requested to do so by the Trust
and for such  compensation  as shall be agreed  upon  between  the Trust and the
Custodian, include certificate numbers in such tabulations.

5.       Opinion of Trust's Independent Accountant

         The Custodian shall take all reasonable action, as the Trust may from
time to time request,  to obtain from year to year  favorable  opinions from the
Trust's  independent  accountants  with respect to its  activities  hereunder in
connection  with the  preparation  of the Trust's  Form N-lA,  and Form N-SAR or
other annual reports to the Securities and Exchange  Commission and with respect
to any other requirements of such Commission.

6.       Reports to Trust by Independent Public Accountants

         The Custodian shall provide the Trust, at such times as the Trust may
reasonably  require,  with  reports by  independent  public  accountants  on the
accounting system,  internal  accounting control and procedures for safeguarding
securities,  futures  contracts  and  options  on futures  contracts,  including
securities  deposited and/or maintained in a Securities System,  relating to the
services  provided by the Custodian  under this  Contract;  such reports,  which
shall be of sufficient  scope and in  sufficient  detail,  as may  reasonably be
required  by the  Trust  to  provide  reasonable  assurance  that  any  material
inadequacies  would be disclosed by such examination,  and, if there are no such
inadequacies, shall so state.

7.       Compensation of Custodian

         The Custodian shall be entitled to  reasonable  compensation  for its
services and expenses as Custodian, as agreed upon from time to time between the
Trust and the Custodian.

8.       Responsibility of Custodian

         So long as and to the extent that it is in the  exercise of  reasonable
care,  the  Custodian  shall  not be  responsible  for the  title,  validity  or
genuineness  of any  property  or evidence  of title  thereto  received by it or
delivered by it pursuant to this  Contract and shall be held  harmless in acting
upon any notice,  request,  consent,  certificate or other instrument reasonably
believed  by it
<PAGE>
to be genuine  and to be signed by the proper  party or parties.  The  Custodian
shall be held to the exercise of reasonable  care in carrying out the provisions
of this Contract,  but shall be kept indemnified by the Trust  transaction taken
or omitted by it in the proper  execution  of  instructions  from the Trust.  It
shall be entitled to rely on and may act upon advice of counsel for the Trust on
all matters and shall be without  liability for any action  reasonably  taken or
omitted   pursuant  to  such  advice.   Notwithstanding   the   foregoing,   the
responsibility  of the Custodian with respect to  redemptions  effected by check
shall be in  accordance  with a separate  Agreement  entered  into  between  the
Custodian and the Trust.

         The Trust agrees to indemnify  and hold  harmless the Custodian and its
nominee from and against all taxes, charges, expenses,  assessments,  claims and
liabilities  (including  counsel  fees)  incurred or assessed  against it or its
nominee in connection with the performance of this Contract,  except such as may
arise from it or its nominee's own negligent action, negligent failure to act or
willful  misconduct.  The  Custodian is  authorized to charge any account of the
Trust for such items and its fees. To secure any such authorized charges and any
advances of cash or  securities  made by the  Custodian to or for the benefit of
the Trust for any purpose which  results in the Trust  incurring an overdraft at
the end of any business day or for  extraordinary  or emergency  purposes during
any business day, the Trust hereby  grants to the Custodian a security  interest
in and pledges to the Custodian  securities held for it by the Custodian,  in an
amount not to exceed five  percent of the Trust's  gross  assets,  the  specific
securities  to be  designated  in writing  from time to time by the Trust or its
investment  adviser (the "Pledged  Securities").  Should the Trust fail to repay
promptly any advances of cash or securities,  the Custodian shall be entitled to
use available  cash and to dispose of the Pledged  Securities as is necessary to
repay any such advances.

9.       Effective Period, Termination and Amendment

         This Contract shall  become  effective  as of  its  execution,  shall
continue in full force and effect until terminated as hereinafter provided,  may
be  amended at any time by mutual  agreement  of the  parties  hereto and may be
terminated  by either  party by an  instrument  in writing  delivered
<PAGE>
or mailed,  postage prepaid to the other party,  such termination to take effect
not sooner  than  thirty  (30) days after the date of such  delivery or mailing;
provided,  however that the Custodian shall not act under Section 2.12 hereof in
the  absence  of  receipt  of an  initial  certificate  of the  Secretary  or an
Assistant  Secretary  that the Board of Trustees of the Trust has  approved  the
initial  use of a  particular  Securities  System  and the  receipt of an annual
certificate  of the  Secretary  or an  Assistant  Secretary  that  the  Board of
Trustees  has  reviewed  the use by the  Trust  of such  Securities  System,  as
required in each case by Rule 17f-4 under the Investment Company Act of 1940, as
amended;  provided further, however, that the Trust shall not amend or terminate
this Contract in contravention of any applicable  federal or state  regulations,
or any provision of the Declaration of Trust,  and (b) that the Trust may at any
time by action of its Board of Trustees  (i)  substitute  another  bank or trust
company for the Custodian by giving  notice as described  above to the Custodian
or (ii) immediately terminate this Contract in the event of the appointment of a
conservator  or receiver for the Custodian or upon the happening of a like event
at the  direction  of an  appropriate  regulatory  agency or court of  competent
jurisdiction.

         Upon termination of the Contract,  the Trust shall pay to the Custodian
such  compensation  as may be due as of the date of such  termination  and shall
likewise reimburse the Custodian for its costs, expenses and disbursements.

10.      Successor Custodian

         If a successor custodian shall be appointed by the Board of Trustees of
the Trust,  the Custodian  shall,  upon  termination,  deliver to such successor
custodian  at the office of the  Custodian,  duly  endorsed  and in the form for
transfer,  all  securities  then held by it hereunder  and shall  transfer to an
account of the  successor  custodian  all of the  Trust's  securities  held in a
Securities System.

         If no such successor custodian shall be appointed, the Custodian shall,
in like  manner,  upon  receipt  of a  certified  copy of a vote of the Board of
Trustees of the Trust,  deliver at the office of the Custodian and transfer such
securities, funds and other properties in accordance with such vote.
<PAGE>

         In the event that no written order designating a successor custodian or
certified  copy of a vote of the Board of Trustees  shall have been delivered to
the  Custodian  on or  before  the  date  when  such  termination  shall  become
effective, then the Custodian shall have the right to deliver to a bank or trust
company,  which is a "bank" as defined in the Investment Company Act of 1940, of
its own selection,  having an aggregate capital, surplus, and undivided profits,
as  shown by its last  published  report,  of not  less  than  $25,000,000,  all
securities, funds and other properties held by the Custodian and all instruments
held by the Custodian  relative  thereto and all other property held by it under
this Contract and to transfer to an account of such  successor  custodian all of
the Trust's securities held in any Securities System.  Thereafter,  such bank or
trust company shall be the successor of the Custodian under this Contract.

         In the event that securities,  funds and other properties remain in the
possession  of the  Custodian  after  the date of  termination  hereof  owing to
failure of the Trust to procure the certified copy of the vote referred to or of
the Board of Trustees to appoint a successor  custodian,  the Custodian shall be
entitled  to fair  compensation  for its  services  during  such  period  as the
Custodian retains possession of such securities,  funds and other properties and
the  provisions of this Contract  relating to the duties and  obligations of the
Custodian shall remain in full force and effect.

11.      Interpretive and Additional Provisions

         In connection  with the operation of this  Contract,  the Custodian and
the Trust may from time to time agree on such  provisions  interpretive of or in
addition to the  provisions  of this  Contract as may in their joint  opinion be
consistent  with the general tenor of this Contract.  Any such  interpretive  or
additional  provisions shall be in a writing signed by both parties and shall be
annexed  hereto,  provided that no such  interpretive  or additional  provisions
shall contravene any applicable federal or state regulations or any provision of
the Declaration of Trust of the Trust. No interpretive or additional  provisions
made as provided in the preceding sentence shall be deemed to be an amendment of
this Contract.
<PAGE>

12.      Massachusetts Law to Apply

         This Contract shall be construed and the provisions thereof interpreted
under and in accordance with laws of The Commonwealth of Massachusetts.

13.      Prior Contracts

         This Contract  supersedes and  terminates,  as of the date hereof,  the
existing custodian  contract between the Trust and the Custodian.  Any reference
to the  custodian  contract  between the Trust and the  Custodian  in  documents
executed prior to the date hereof shall be deemed to refer to this Contract.

         IN WITNESS  WHEREOF,  each of the parties has caused this instrument to
be executed in its name and behalf by its duly authorized representative and its
seal to be hereunder affixed as of the 19th day of February, 1988.

ATTEST                                 MFS GOVERNMENT SECURITIES HIGH YIELD
                                         TRUST




ARNOLD D. SCOTT                        By:     RICHARD B. BAILEY
Arnold D. Scott                                Richard B. Bailey



ATTEST                                 STATE STREET BANK & TRUST COMPANY



J. FARRELL                             By:     ILLEGIBLE
J. Farrell                                     [Illegible]
Assistant Secretary                            Vice President


<PAGE>
                                                           EXHIBIT NO. 99.8(b)

                                  AMENDMENT TO
                               CUSTODIAN CONTRACT


         Amendment to Custodian Contract between MFS Government  Securities High
Yield  Trust,  a  business  trust  organized  and  existing  under  the  laws of
Massachusetts,  having a principal  place of business  at 200  Berkeley  Street,
Boston,  Massachusetts 02116 (hereinafter  called the "Fund"),  and State Street
Bank and Trust Company,  a  Massachusetts  trust  company,  having its principal
place  of  business  at  225  Franklin  Street,   Boston,   Massachusetts  02110
(hereinafter called the "Custodian").

         WHEREAS:  The Fund and the Custodian are parties to a Custodian
Contract dated February 19, l988 (the "Custodian Contract") ;

         WHEREAS:  The Fund desires that the Custodian  issue a letter of credit
(the  "Letter of  Credit")  on behalf of the Fund for the  benefit of ICI Mutual
Insurance  Company (the "Company") in accordance  with the Continuing  Letter of
Credit and Security  Agreement and that the Fund's  obligations to the Custodian
with respect to the Letter of Credit shall be fully  collateralized at all times
while the Letter of Credit is  outstanding  by, among other  things,  segregated
assets of the Fund equal to 125% of the face  amount to the amount of the Letter
of Credit;

         WHEREAS:  The Custodian Contract provides for the establishment of
segregated accounts for proper Fund purposes upon Proper Instructions (as
defined in the Custodian Contract); and

         WHEREAS:  The Fund and the Custodian desire to establish a segregated
account to hold the collateral for the Fund's obligations to the Custodian
with respect to the Letter of Credit and to amend the Custodian Contract to
provide for the establishment and maintenance thereof;

         WITNESSETH:  That in consideration of the mutual covenants and
agreements hereinafter contained, the parties hereto hereby amend the
Custodian Contract as follows:

         1.  Capitalized terms used herein without definition shall have
the meanings ascribed to them in the Custodian Contract.

         2.  The Fund hereby instructs the Custodian to establish and maintain a
segregated account (the "Letter of Credit Custody Account") for and in behalf of
the Fund as contemplated by Section 2.13(iv) for the purpose of  collateralizing
the Fund's obligations under this Amendment to the Custodian Contract.

         3.  The Fund shall deposit with the Custodian and the Custodian  shall
hold in the Letter of Credit Custody  Account cash, U.S.  government  securities
and  other  high-grade  debt  securities  owned  by the Fund  acceptable  to the
Custodian  (collectively
<PAGE>
"Collateral  Securities")  equal to 125% of the face amount to the amount  which
the Company may draw under the Letter of Credit. Upon receipt of such Collateral
Securities in the Letter of Credit Custody  Account,  the Custodian  shall issue
the Letter of Credit to the Company.

         4.  The fund hereby grants to the Custodian a security interest in the
Collateral  Securities from time to time in the Letter of Credit Custody Account
(the  "Collateral")  to secure the performance of the Fund's  obligations to the
Custodian with respect to the Letter of Credit,  including,  without limitation,
under Section  5-114(3) of the Uniform  Commercial Code. The Fund shall register
the pledge of Collateral  and execute and deliver to the  Custodian  such powers
and  instruments  of assignment as may be requested by the Custodian to evidence
and perfect the limited interest in the Collateral granted hereby.

         5.  The Collateral Securities in the Letter of Credit  Custody  Account
may be  substituted or exchanged  (including  substitutions  or exchanges  which
increase or decrease the  aggregate  value of the  Collateral)  only pursuant to
Proper  Instructions  from the Fund after the Fund notifies the Custodian of the
contemplated  substitution  or  exchange  and the  Custodian  agrees  that  such
substitution or exchange is acceptable to the Custodian.

         6.  Upon any  payment  made  pursuant  to the  Letter  of Credit by the
Custodian  to the  Company,  after  notice to the  company,  the  Custodian  may
withdraw from the Letter of Credit Custody Account  Collateral  Securities in an
amount equal in value to the amount  actually so paid. The Custodian  shall have
with  respect  to the  Collateral  so  withdrawn  all of the rights of a secured
creditor under the Uniform  Commercial  Code as adopted in the  Commonwealth  of
Massachusetts  at the time of such  withdrawal  and all other rights  granted or
permitted to it under law.

         7.  The Custodian  will  transfer upon receipt all income earned on the
Collateral  to the Fund custody  account  unless the Custodian  receives  Proper
Instructions from the Fund to the contrary.

         8.  Upon the drawing  by the  Company of all  amounts  which may become
payable to it under the Letter of Credit and the  withdrawal  of all  Collateral
Securities with respect  thereto by the Custodian  pursuant to Section 6 hereof,
or upon the  termination  of the  Letter of Credit by the Fund with the  written
consent of the Company,  the Custodian shall transfer any Collateral  Securities
then remaining in the Letter of Credit  Custody  Account to another fund custody
account.

         9.  Collateral  held in the Letter of Credit  Custody  Account shall be
released only in accordance  with the  provisions of this Amendment to Custodian
Contract.  The Collateral shall at all times until withdrawn pursuant to Section
6 hereof  remain the  property  of the Fund,  subject  only to the extent of the
interest granted herein to the Custodian.
<PAGE>

         10. Notwithstanding  any other termination of the Custodian  Contract,
the Custodian Contract shall remain in full force and effect with respect to the
Letter of Credit Custody  Account until  transfer of all  Collateral  Securities
pursuant to Section 8 hereof.

         11. The Custodian shall be entitled to reasonable  compensation for its
issuance  of the Letter of Credit and for its  services in  connection  with the
Letter of Credit  Custody  Account as agreed upon from time to time  between the
Fund and the Custodian.

         12. The Custodian Contract as amended hereby, shall be governed
by, and construed and interpreted under, the laws of the Commonwealth of
Massachusetts.

         13. The parties agree to execute and deliver all such further documents
and  instruments and to take such further action as may be required to carry out
the purposes of the Custodian Contract, as amended hereby.

         14. Except as  provided in this  Amendment  to Custody  Contract,  the
Custodian  Contract shall remain in full force and effect,  without amendment or
modification,  and all  applicable  provisions  of the  Custodian  Contract,  as
amended hereby, including,  without limitation,  Section 8 thereof, shall govern
the Letter of Credit Custody  Account and the rights and obligations of the Fund
and the Custodian  under this Amendment to Custodian  Contract.  No provision of
this  Amendment to Custodian  Contract shall be deemed to constitute a waiver of
any rights of the Custodian under the Custodian Contract or under law.

         IN WITNESS  WHEREOF,  each of the parties has caused this  Amendment to
Custodian  Contract to be executed in its name and behalf by its duly authorized
representatives  and its  seal to be  hereunder  affixed  as of the  29th day of
February, 1988.

ATTEST:


By:  D. M. JAFFE                       By:     W. T. LONDON
     D. M. Jaffe                               W. T. London
                                               Treasurer


ATTEST:                                STATE STREET BANK & TRUST COMPANY


By:  K. M. KNEELAND                    By:     PHYLLIS A. SCHRODER
     K. M. Kneeland                            Phyllis A. Schroder
     Assistant Secretary                       Vice President

<PAGE>
                                                          EXHIBIT NO. 99.8(c)

                        AMENDMENT TO CUSTODIAN CONTRACT



         Agreement made as of this 1st day of October, 1989 by and between State
Street Bank and Trust Company (the  "Custodian") and MFS Government  Income Plus
Trust (the "Trust").

         WHEREAS,  the  Custodian  and the  Trust  are  parties  to a  Custodian
Contract dated  February 19, 1988 (the  "Custodian  Contract)  which governs the
terms  and  conditions  under  which  the  Custodian  maintains  custody  of the
securities and other assets of the Trust;

         WHEREAS, the Custodian may delegate to Massachusetts Financial Services
Company  ("MFS") the performance of certain duties the Custodian would otherwise
be obligated to perform pursuant to the Custodian Agreement;

         WHEREAS, the Trust agrees to any such delegation of certain Custodian
duties;

         NOW  THEREFORE,  the  Custodian and the Trust hereby amend the terms of
the Custodian Contract and mutually agree to the following:

         1)  Add new Section 14 which shall read as follows:

         14  Delegation of Certain Custodian Duties to MFS.

             The Custodian may delegate to MFS the performance of any or all of
its duties hereunder  relating to (i) accounting for investments in currency and
for financial instruments (including,  without limitation,  options,  contracts,
futures contracts, options on futures contracts, options on foreign currency and
forward  foreign  currency  exchange  contracts)  and  (ii)  federal  and  state
regulatory compliance. The Custodian shall compensate MFS for the performance of
such duties at such fee or fees as MFS shall determine to be equal to MFS's cost
for  performing  such duties (the "MFS Fees").  Following its payment of the MFS
Fees to MFS, the Custodian shall recover the amount of the MFS Fees and from the
Trust on such terms as the  Custodian  and the Trust  shall  agree.  MFS assumes
responsibility  for all duties delegated to it by the Custodian pursuant to this
Section 14, and the Custodian  may rely on MFS for the accuracy and  correctness
of the accounting  information provided by MFS to the Custodian pursuant to this
Section 14.

         IN  WITNESS  WHEREOF,  each of the  parties  hereto  have  caused  this
instrument  to be  executed  in its name and on its behalf by a duly  authorized
representative as of the aforementioned day and year.

ATTEST                                 MFS GOVERNMENT INCOME PLUS TRUST



LINDA J. HOARD                         By:     A. KEITH BRODKIN
Linda J. Hoard                                 A. Keith Brodkin

ATTEST                                 STATE STREET BANK & TRUST COMPANY


MARK MORGAN                            By:     PHYLLIS A. SCHRODER
Mark Morgan                                    Phyllis A. Schroder
Assistant Secretary                            Vice President

<PAGE>
                                                            EXHIBIT NO. 99.8(d)

                                   AMENDMENT



         The Custodian  Contract  dated February 19, 1988 between MFS Government
Income Plus Trust  (referred to herein as the "Trust") and State Street Bank and
Trust Company (the "Custodian") is hereby amended as follows:

         I.   Section 2.1 is amended to read as follows:

              "Holding  Securities.  The Custodian shall hold and physically
segregate  for the account of the Trust all  non-cash  property,  including  all
securities  owned by the Trust,  other than (a) securities  which are maintained
pursuant  to  Section  2.12 in a  clearing  agency  which  acts as a  securities
depository or in a book-entry  system  authorized by the U.S.  Department of the
Treasury,  collectively  referred  to  herein  as  "Securities  System"  and (b)
commercial paper of an issuer for which State Street Bank and Trust Company acts
as  issuing  and  paying  agent  ("Direct  Paper")  which  is  deposited  and/or
maintained  in the Direct  Paper  System of the  Custodian  pursuant  to Section
2.12A.

         II.  Section 2.2 is amended to read, in relevant part as follows:

              "Delivery  of  Securities.  The  Custodian  shall  release and
deliver  securities  owned by the Trust held by the Custodian or in a Securities
System  account of the Custodian or in the  Custodian's  Direct Paper book entry
system  account  ("Direct  Paper  System  Account")  only upon receipt of Proper
Instructions,  which may be continuing  instructions when deemed  appropriate by
the parties, and only in following cases:

              1)       . . . .

              .

              .

              .

              15)      . . . ."

         III. Section 2.8(1) is amended to read in relevant part as follows:

              "Payment of Trust Monies.  Upon receipt of Proper Instructions,
which may be continuing instructions when deemed appropriate by the parties, the
Custodian shall pay out monies of the Trust in the following cases only:
<PAGE>

              1)  Upon the purchase of securities, options, futures contracts
or  options  on  futures  contracts  for the  account  of the Trust but only (a)
against the delivery of such  securities  or evidence of title to such  options,
futures  contracts or options on futures  contracts,  to the  Custodian  (or any
bank,  banking  firm or trust  company  doing  business in the United  States or
abroad which is qualified under the Investment  Company Act of 1940, as amended,
to act as a custodian and has been  designated by the Custodian as its agent for
this purpose) registered in the name of the Trust or in the name of a nominee of
the Custodian  referred to in Section 2.3 hereof or in proper form for transfer;
(b) in  the  case  of a  purchase  effected  through  a  Securities  System,  in
accordance  with the conditions set forth in Section 2.12 hereof (c) in the case
of a  purchase  involving  the  Direct  Paper  System,  in  accordance  with the
conditions  set  forth  in  Section  2.12A;  or (d) in the  case  of  repurchase
agreements entered into between the Trust and the Custodian, or another bank, or
a  broker-dealer  which  is a  member  of  NASD,  (i)  against  delivery  of the
securities  either  in  certificate  form or  through  an  entry  crediting  the
Custodian's  account at the Federal  Reserve Bank with such  securities  or (ii)
against delivery of the receipt  evidencing  purchase by the Trust of securities
owned by the  Custodian  along with  written  evidence of the  agreement  by the
Custodian to repurchase  such securities from the Trust or (e) for transfer to a
time deposit account of the Trust in any bank, whether domestic or foreign; such
transfer may be effected prior to receipt of a confirmation from a broker and/or
the applicable bank pursuant to Proper Instructions from the Trust as defined in
Section 2.17;"

         IV.  Following Section 2.12 there is inserted a new Section
2.12.A to read as follows:

              2.12.A  "Trust  Assets Held in the  Custodian's  Direct  Paper
  System.  The Custodian may deposit  and/or  maintain  securities  owned by the
  Trust in the Direct Paper  System of the  Custodian  subject to the  following
  provisions:

              1)   No transaction relating to securities in the Direct Paper
System will be effected in the absence of Proper Instructions;

              2)   The Custodian may keep securities of the Trust in the Direct
Paper System only if such securities are  represented in an account  ("Account")
of the  Custodian  in the Direct Paper System which shall not include any assets
of the Custodian  other than assets held as a fiduciary,  custodian or otherwise
for customers;

              3)   The records of the Custodian with respect to securities of
the Trust which are  maintained  in the Direct Paper  System  shall  identify by
book-entry those securities belonging to the Trust;
<PAGE>

              4)   The Custodian shall pay for securities purchased for the
account of the Trust upon the making of an entry on the records of the Custodian
to reflect such payment and transfer of  securities to the account of the Trust.
The Custodian  shall transfer  securities sold for the account of the Trust upon
the making of an entry on the records of the  Custodian to reflect such transfer
and receipt of payment for the account of the Trust:

              5)   The Custodian shall furnish the Trust confirmation of each
transfer to or from the account of the Trust, in the form of a written advice or
notice,  of Direct Paper on the next  business day  following  such transfer and
shall furnish to the Trust copies of daily  transaction  sheets  reflecting each
day's transaction in the Securities System for the account of the Trust;

              6)   The Custodian shall provide the Trust with any report on its
system of internal  accounting  control as the Trust may reasonably request from
time to time."

         V.   Section 9 is hereby amended to read as follows:

              "Effective  Period,  Termination and Amendment.  This Contract
shall become  effective as of its  execution,  shall  continue in full force and
effect until terminated as hereinafter  provided,  may be amended at any time by
mutual  agreement of the parties hereto and may be terminated by either party by
an  instrument  in writing  delivered  or mailed,  postage  prepaid to the other
party,  such  termination  to take effect not sooner than thirty (30) days after
the date of such delivery or mailing; provided, however that the Custodian shall
not act under  Section  2.12  hereof in the  absence  of  receipt  of an initial
certificate  of the  Secretary  or an  Assistant  Secretary  that  the  Board of
Trustees of the Trust has approved  the initial use of a  particular  Securities
System and the receipt of an annual certificate of the Secretary or an Assistant
Secretary  that the Board of Trustees  has reviewed the use by the Trust of such
Securities  System,  as required in each case by Rule 17f-4 under the Investment
Company  Act of 1940,  as  amended  and that the  Custodian  shall not act under
Section 2.12.A hereof in the absence of receipt of an initial certificate of the
Secretary or an Assistant  Secretary that the Board of Trustees has approved the
initial use of the Direct Paper System and the receipt of an annual  certificate
of the  Secretary  or an  Assistant  Secretary  that the Board of  Trustees  has
reviewed  the use by the Trust of the Direct  Paper  System;  provided  further,
however,  that  the  Trust  shall  not  amend  or  terminate  this  Contract  in
contravention of any applicable federal or state  regulations,  or any provision
of the  Declaration of Trust,  and further  provided,  that the Trust may at any
time by action of its Board of Trustees  (i)  substitute  another  bank or trust
company for the Custodian by giving notice as described  above to the Custodian,
or (ii) immediately terminate this Contract in the event of the appointment of a
conservator or receiver for the Custodian by the  Comptroller of the Currency or
upon the happening of a like event at the direction of an appropriate regulatory
agency or court of competent jurisdiction.
<PAGE>

         Upon termination of the Contract,  the Trust shall pay to the Custodian
such  compensation  as may be due as of the date of such  termination  and shall
likewise reimburse the Custodian for its costs, expenses and disbursements."

         Except  as  otherwise   expressly  amended  and  modified  herein,  the
provisions of the Custodian Contract shall remain in full force and effect.

         IN  WITNESS  WHEREOF,  each  of the  parties  hereto  has  caused  this
Amendment  to be executed  in its name and on its behalf by its duly  authorized
representatives  and  its  Seal  to be  hereto  affixed  as of the  17th  day of
September, 1991.



ATTEST:                                MFS GOVERNMENT INCOME PLUS TRUST


LINDA J. HOARD                         By:     W. T. LONDON
Linda J. Hoard                                 W. T. London
Assistant Secretary                            Treasurer


ATTEST:                                STATE STREET BANK & TRUST COMPANY


JOE KENNALLY                           By:     JOHN HENRICH
Joe Kennally                                   John Henrich
Assistant Secretary                            Vice President

<PAGE>
                                                            EXHIBIT NO. 99.9(a)


                               MFS SERIES TRUST X
                              500 Boylston Street
                          Boston, Massachusetts 02116



                                       September 1, 1995




MFS Service Center, Inc.
500 Boylston Street
Boston, Massachusetts 02116

                     Shareholder Servicing Agent Agreement

Dear Sir:

         MFS Series Trust X which is a Massachusetts business trust (referred to
as the  "Fund"),  is an open-end  registered  investment  company.  The Fund has
selected you to act as its  Shareholder  Servicing Agent and you hereby agree to
act as such Agent and to perform the duties and functions  thereof in the manner
and on the conditions hereinafter set forth. Accordingly, the Fund hereby agrees
with you as follows:

         1.  The Facility.  You represent  that you have the necessary  computer
equipment,  software and other office equipment ("Facility") adequate to perform
the services  contemplated  hereby for the Fund as well as for other  investment
companies  (such  investment  companies,  together  with the  Fund,  are  herein
collectively  referred to as the "MFS Funds") for which Massachusetts  Financial
Services Company ("MFS") acts as investment  adviser.  The Facility is presently
located at 500 Boylston Street,  Boston,  Massachusetts,  and is to be dedicated
solely to the  performance  of  services  for the MFS Funds,  provided  that the
Facility may be utilized to perform  services for others with the  permission of
the MFS Funds.

         2.  Name. Unless otherwise directed in writing by MFS, you shall
perform the services  contemplated  hereby  under the name "MFS Service  Center,
Inc.",  which name and any similar names and any logos of which shall remain the
property and under the control of MFS. Upon  termination of this Agreement,  you
shall cease to use such name or any similar name within a  reasonable  period of
time.

         3.  Services to be Performed. As Shareholder Servicing Agent ("Agent"),
you shall be responsible for administering and performing  transfer and dividend
and distribution disbursing
<PAGE>
functions in connection with the issuance,  transfer and redemption of shares of
beneficial  interest  ("Shares").  The details of the  operating  standards  and
procedures  to be  followed  by you  shall be  determined  from  time to time by
agreement between you and the Fund.

         4.  Standard  of Service.  As Agent for the Fund,  you agree to provide
service  equal to or better  than  that  provided  by you or  others  furnishing
shareholder  services to other open-end investment  companies  ("Standard") at a
fee  comparable  to the fee paid you for your services  hereunder.  The Standard
shall include at least the following:

             (a) Prompt reconciliation of any differences as to the number of
outstanding shares between various Facility records or between Facility
records and records of the Fund's custodian;

             (b) Prompt processing of shareholder correspondence and of other
matters requiring action by you;

             (c) Prompt clearance of any daily volume backlog;

             (d) Providing innovative services and technological improvements;

             (e) Meeting the requirements of any governmental authority having
jurisdiction over you or the Fund; and

             (f) Prompt reconciliation of all bank accounts under your control
belonging to the Fund or MFS.

         If any MFS Fund  serviced  by you is  reasonably  of the view  that the
service  provided by you does not meet the  Standard,  it shall give you written
notice specifying the particulars,  and you then shall have 120 days in which to
restore the service so that it meets the Standard, except that such period shall
be 180 days with respect to meeting that portion of the Standard described above
in item (d) of this  paragraph  4. If at the end of such period the Fund remains
reasonably  of the view that the service  provided  by you,  in the  particulars
specified,  does  not  meet the  Standard,  then the MFS Fund or Funds  having a
majority of the accounts for which you are then Agent may, by appropriate action
(including  the  concurrence  of a majority of the  Trustees of such MFS Fund or
Funds, who are not interested persons of MFS), elect to terminate this Agreement
for cause as to all such  Funds  upon 90 days  notice to you.  Upon  termination
hereof,  the Fund shall pay you such compensation as may be due to you as of the
date of such  termination,  and  shall  likewise  reimburse  you for any  costs,
expenses,  and  disbursements  reasonably  incurred  by you to such  date in the
performance of your duties hereunder.

         5.  Purchase of  Facility.  In the event that you have given  notice of
termination of this Agreement pursuant to the provisions of paragraph 14 hereof,
or for cause as  provided in  paragraph  4 hereof,  the MFS Funds shall have the
right,  but shall not be required  (a) to purchase  the  Facility and assume the
unexpired  portion of any leases of  equipment  or real  estate  relating to the
Facility  from you at a price equal to your  estimated  unrecovered  acquisition
value (as
<PAGE>
supported by the schedules and records used in determining  monthly billings) of
the  machinery,   equipment,   software,   furniture,   fixtures  and  leasehold
improvements  included in the Facility,  and (b) to negotiate  with persons then
employed  by you in the  operation  of the  Facility  and to hire all of them in
connection  with the  purchase of the  Facility  from you by the MFS Funds.  You
agree to  release  each such  employee  from any  contractual  obligations  such
persons may have to you that may  interfere  with such  person's  being hired at
such time by the MFS Funds and agree not to interfere with the  negotiation  and
hiring of any such  persons  at any such  time.  In the event that the MFS Funds
have given notice of termination of this Agreement pursuant to the provisions of
paragraph  14 hereof,  for  reasons  other than cause as defined in  paragraph 4
hereof, the MFS Funds shall purchase the Facility under the terms and conditions
set forth in subsections (a) and (b) of this paragraph 5.

         You  shall  effect  the  transfer  of the  Facility  pursuant  to  this
paragraph 5 upon the termination date specified in the notice,  or at such other
time as shall be agreed upon by the parties hereto.

         6.  Rights in Data and  Confidentiality.  You agree  that all  records,
data, files, input materials,  reports, forms and other data received,  computed
or stored in the performance of this Agreement are the exclusive property of the
Fund and that all  such  records  and  other  data  shall be  furnished  without
additional  charge,  except for actual  processing costs, to the Fund in machine
readable as well as printed form  immediately upon termination of this Agreement
or at the Fund's request.  You shall safeguard and maintain the  confidentiality
of the Fund's data and information supplied to you by the Fund and you shall not
transfer or disclose the Fund's data to any third party without the Fund's prior
written  consent  unless  compelled  to do so by order of a court or  regulatory
authority.

         7.  Fees.  The fee per  Fund  shareholder  account  for  your  services
hereunder  shall not be in excess of such  amount as shall be agreed in  writing
between us. Such fee shall be  calculated  daily and paid monthly based upon the
average  daily net  assets of the Fund or any  series  thereof,  as set forth in
Exhibit A hereto.  Such fee shall be  subject  to review at least  annually  and
fixed by the parties in good faith  negotiation  on the basis of a statement  of
the expenses of the Facility  prepared by you,  which either you or the Fund may
require to be certified by a major  accounting  firm  acceptable to the parties.
The party or parties  requesting  such  certification  shall  bear all  expenses
thereof.  In addition to the  foregoing  fee, you will be reimbursed by the Fund
for  out-of-pocket  expenses  reasonably  incurred by you on behalf of the Fund,
including but not limited to expenses for stationery  (including  business forms
and  checks),  postage,  telephone  and  telegraph  line and toll  charges,  and
premiums for negotiable instrument insurance and similar items.

         8. Record  Keeping.  You will maintain  records in a form acceptable to
the Fund and in compliance  with the rules and regulations of the Securities and
Exchange  Commission,  including  but not  limited  to  records  required  to be
maintained by Section 31(a) of the Investment  Company Act of 1940 and the rules
thereunder,  which at all  times  will be the  property  of the Fund and will be
available for inspection and use by the Fund.
<PAGE>

         9. Duty of Care and Indemnification.  You will at all times act in good
faith in performing your duties hereunder. You will not be liable or responsible
for delays or errors by reason of circumstances  beyond your control,  including
acts of civil or military authority,  national emergencies,  labor difficulties,
fire,  mechanical breakdown beyond your control,  flood or catastrophe,  acts of
God, insurrection,  war, riots or failure beyond your control of transportation,
communication or power supply.  The Fund will indemnify you against and hold you
harmless  from any and all  losses,  claims,  damages,  liabilities  or expenses
(including  reasonable  counsel  fees and  expenses)  resulting  from any claim,
demand,  action or suit not  resulting  from your bad faith or  negligence,  and
arising  out of,  or in  connection  with,  your  duties  on  behalf of the Fund
hereunder.  In  addition,  the Fund  will  indemnify  you  against  and hold you
harmless  from any and all  losses,  claims,  damages,  liabilities  or expenses
(including  reasonable  counsel  fees and  expenses)  resulting  from any claim,
demand,  action  or suit as a  result  of your  acting  in  accordance  with any
instructions  reasonably  believed  by you  to  have  been  executed  or  orally
communicated  by any  person  duly  authorized  by  the  Fund  or its  Principal
Underwriter,  or as a result of acting in accordance with written or oral advice
reasonably  believed by you to have been given by counsel for the Fund,  or as a
result  of  acting  in  accordance  with any  instrument  or  share  certificate
reasonably  believed by you to have been  genuine and signed,  countersigned  or
executed by any person or persons authorized to sign, countersign or execute the
same (unless  contributed to by your gross negligence or bad faith). In any case
in which the Fund may be asked to indemnify you or hold you  harmless,  the Fund
shall be advised of all pertinent facts concerning the situation in question and
you will use reasonable care to identify and notify the Fund promptly concerning
any  situation  which  presents  or  appears  likely  to  present  a  claim  for
indemnification  against the Fund.  The Fund shall have the option to defend you
against any claim which may be the subject of this  indemnification,  and in the
event that the Fund so elects such defense shall be conducted by counsel  chosen
by the Fund and satisfactory to you and it will so notify you, and thereupon the
Fund shall  take over  complete  defense  of the claim and you shall  sustain no
further  legal  or  other   expenses  in  such  situation  for  which  you  seek
indemnification  under  this  paragraph,  except the  expense of any  additional
counsel  retained  by you.  You will in no case  confess  any  claim or make any
compromise  in any case in which the Fund will be asked to indemnify  you except
with the Fund's prior written  consent.  The  obligations  of the parties hereto
under this paragraph shall survive the termination of this Agreement.

         If any officer of the Fund shall no longer be vested with  authority to
sign for the Fund, written notice thereof shall forthwith be given to you by the
Fund and until receipt of such notice by it, you shall be fully  indemnified and
held harmless by the Fund in recognizing  and acting upon  certificates or other
instruments bearing the signatures or facsimile signatures of such officer.

         10. Insurance.  You will notify the Fund should any of your insurance
coverage  be changed for any reason,  such  notification  to include the date of
change and reason or reasons therefor.
<PAGE>

         11. Notices.  All notices or other communications hereunder shall be in
writing  and  shall be  deemed  sufficient  if  mailed  to  either  party at the
addresses set forth in this Agreement, or at such other addresses as the parties
hereto may designate by notice to each other.

         12. Further Assurances.  Each party agrees to perform such further
acts and execute such  further  documents as are  necessary  to  effectuate  the
purposes hereof.

         13. Use of a Sub- or  Co-Transfer  Agent.  Notwithstanding  any  other
provision of this Agreement,  it is expressly understood and agreed that you are
authorized in the performance of your duties  hereunder to employ,  from time to
time, one or more Sub-Transfer Agents and/or Co-Transfer Agents.

         14. Termination. Neither this Agreement nor any provision hereof may be
changed,  waived,  discharged or terminated orally, but only by an instrument in
writing, which, except in the case of termination,  shall be signed by the party
against which enforcement of such change,  waiver or discharge is sought. Except
as  otherwise  provided in paragraph 4 hereof,  this  Agreement  shall  continue
indefinitely  until  terminated by 90 days' written  notice given by the Fund to
you or by you to the Fund. Upon termination  hereof, the Fund shall pay you such
compensation as may be due to you as of the date of such termination,  and shall
likewise  reimburse you for any costs,  expenses,  and disbursements  reasonably
incurred by you to such date in the  performance of your duties  hereunder.  You
agree to  cooperate  with  the Fund and  provide  all  necessary  assistance  in
effectuating an orderly transition upon termination of this Agreement.

         15. Successor.  In the event that in  connection  with  termination  a
successor to any of your duties or  responsibilities  hereunder is designated by
the Fund by written notice to you, you will,  promptly upon such termination and
at the expense of the Fund,  transfer to such  successor a certified list of the
shareholders of the Fund (with name,  address and tax  identification  or Social
Security  number),  an historical  record of the account of each shareholder and
the status thereof, and all other relevant books, records,  correspondence,  and
other  data  established  or  maintained  by you under  this  Agreement  in form
reasonably  acceptable  to the Fund (if such form differs from the form in which
you have  maintained the same, the Fund shall pay any expenses  associated  with
transferring  the same to such form), and will cooperate in the transfer of such
duties  and  responsibilities,  including  provision  for  assistance  from your
cognizant  personnel in the  establishment  of books,  records and other data by
such successor.

         16. Miscellaneous.  This Agreement  shall be construed and enforced in
accordance with and governed by the laws of The  Commonwealth of  Massachusetts.
The captions in this  Agreement are included for  convenience  of reference only
and in no way define or delimit any of the provisions hereof or otherwise affect
their construction or effect.  This Agreement may be executed  simultaneously in
two or more counterparts,  each of which shall be deemed an original, but all of
which taken  together  shall  constitute  one and the same. A copy of the Fund's
Declaration of Trust is on file with the Secretary of State of The  Commonwealth
of  Massachusetts.  The obligations of or arising out of this instrument are not
binding  upon  any  of the  Fund's  trustees,  officers,  employees,  agents  or
shareholders  individually,  but are binding
<PAGE>
solely  upon  the  assets  and  property  of the  Fund in  accordance  with  its
proportionate  interest hereunder.  If this Agreement is executed by the Fund on
behalf of one or more  series  of the Fund,  you  further  acknowledge  that the
assets and  liabilities of each series of the Fund are separate and distinct and
that the obligations of or arising out of this Agreement are binding solely upon
the assets and property of the series on whose behalf the Fund has executed this
Agreement.  If the Fund has executed  this  Agreement on behalf of more than one
series of the Fund, you also agree that the obligations of each series hereunder
shall be several and not joint,  in accordance with its  proportionate  interest
hereunder,  and you agree not to proceed  against any series for the obligations
of another  series.  This Agreement  supersedes and  terminates,  as of the date
hereof,  the  Shareholder  Servicing Agent Agreement dated December 19, 1985, as
modified, among you, MFS and MFS Government Mortgage Fund.

                                       Very truly yours,

                                       MFS SERIES TRUST X


                                       A. KEITH BRODKIN
                                       A. Keith Brodkin
                                       Chairman

The foregoing is hereby accepted as of the date thereof.

                                       MASSACHUSETTS FINANCIAL SERVICES COMPANY


                                       JEFFREY L. SHAMES
                                       Jeffrey L. Shames
                                       President


                                       MFS SERVICE CENTER, INC.


                                       JANET A. CLIFFORD
                                       Janet A. Clifford
                                       Executive Vice President
<PAGE>

                                                               ATTACHMENT 1
                                                               September 1, 1995



                                   EXHIBIT A



1. The fees to be paid by the Fund on behalf of its series with respect to Class
A shares of each series of the Fund to MFSC, for MFSC's  services as shareholder
servicing agent, shall be:

   0.15% of the first $500  million of the assets of the series attributable to
   such  class;
   0.12% of the second $500 million of the assets of the series attributable to
   such class; and
   0.09% of the assets of the series attributable to such class over $1 billion.


2. The fees to be paid by the Fund on behalf of its series with respect to Class
B shares of each series of the Fund to MFSC, for MFSC's  services as shareholder
servicing agent, shall be:

   0.22% of the first $500 million of the assets of the series attributable to
   such class;
   0.18% of the second $500 million of the assets of the series attributable to
   such class; and
   0.13% of the assets of the series  attributable to such class over $1 billion

<PAGE>
                                                            EXHIBIT NO. 99.9(b)


                          EXCHANGE PRIVILEGE AGREEMENT


         AGREEMENT, dated as of September 1, 1993 and as amended and restated as
of September 1, 1995,  by and among each of the trusts (on behalf of each Series
thereof from time to time) listed below (collectively, the "Funds") and MFS Fund
Distributors, Inc. ("MFD").

                                WITNESSETH THAT:

         WHEREAS,  pursuant  to the  terms of a  distribution  agreement  by and
between each Trust and MFD, MFD has the exclusive  right to arrange for the sale
of shares of each class of each Fund at the net asset value used in  determining
the public offering price on which orders for shares were based,  but subject to
the exceptions therein set forth or referred to;

         WHEREAS, the Funds have differing  investment  objectives as set out in
their  offering  prospectuses  and consider it  appropriate to make available to
existing  and future  shareholders  of the Funds the  opportunity  to  implement
changes in their investment  objective  through the  acquisition,  without sales
charge  or  reinitiating  the time  period  used in  calculating  the  amount of
contingent deferred sales charge assessable upon redemption,  of the shares of a
class of any one or more of the Funds by use of the  proceeds of  redemption  of
shares of the same  class of any  other  Fund  (herein  referred  to in  various
grammatical  forms of the word  "exchange"),  subject to  reasonable  conditions
designed to limit  expense and  administrative  inconvenience  or imposed in the
best interest of the other shareholders of any of the Funds;

         WHEREAS,  while MFS Money Market Fund, MFS Government Money Market Fund
and MFS Cash  Reserve Fund (the "Money  Market  Funds")  offer their  respective
shares (Class A shares only in the case of MFS Cash Reserve Fund), to the public
without a sales charge,  each  recognizes  the utility of permitting  its shares
acquired  through  an  exchange  from  Class  A  shares  of  another  Fund to be
reexchanged  for Class A shares of any other Fund,  subject to the  restrictions
hereinafter set forth;

         WHEREAS, while certain Funds offer their respective Class A shares at a
sales charge less than that of the other Funds,  each  recognizes the utility of
permitting its Class A shares  acquired  through an exchange from Class A shares
of another Fund (except the Money Market  Funds) or otherwise to be  reexchanged
for Class A shares of any other Fund,  subject to the  restrictions  hereinafter
set forth; and
<PAGE>

         WHEREAS, MFD currently acts as the distributor of each of the Funds;

NOW, THEREFORE, the parties hereto agree as follows:

         1(a). During the term of this Agreement, shares of each class of a Fund
may,  subject to the  restrictions  hereinafter  set forth, be offered by MFD as
agent at net asset value to  shareholders  of the same class (e.g.,  Class A for
Class A,  Class B for  Class B,  etc.) of each of the other  Funds,  who wish to
apply the proceeds of  redemption  of shares of the same class of any such Fund,
provided  that  either the net asset  value of the shares to be  redeemed in the
exchange is at least  $1,000 ($50 in the case of  accounts  of  retirement  plan
participants  whose  sponsoring  organizations  subscribe to the MFS Fundamental
401(k) Plan or another similar 401(k) recordkeeping system made available by MFS
Service  Center,  Inc.) or such  other  amount or  amounts  as from time to time
described  in the current  Prospectuses  of the Funds or all the shares owned by
the  shareholder in a particular  class are to be redeemed.  MFD may specify the
manner in which such  shareholders  may accept its offer to arrange for the sale
of such shares at net asset value (each such acceptance is hereinafter  referred
to as an "Exchange Request").

         1(b). For the purpose of calculating any applicable contingent deferred
sales charge upon redemption of shares acquired in an exchange,  the purchase of
shares  acquired in one or more exchanges will be deemed to have occurred at the
time of the original purchase of the exchanged shares (prior to their exchange).

         1(c). Shares of the Money Market Funds (Class A shares only in the case
of MFS Cash Reserve  Fund) may be exchanged for Class A shares of any other Fund
in accordance with paragraph 1(a) hereof, but only if they have been acquired by
an  exchange  effected in  accordance  with  paragraph  1(a) hereof from Class A
shares  of  another  Fund  (except  the  Money  Market  Funds) or in the form of
dividends  on Money  Market Fund shares  (Class A shares only in the case of MFS
Cash Reserve  Fund)  reinvested  on and after June 1, 1992.  Shares of the Money
Market Funds (Class A shares only in the case of MFS Cash Reserve Fund) acquired
through  direct  purchase or in the form of dividends on such shares  reinvested
prior to June 1, 1992 may not be exchanged for shares of another Fund.

         2. MFD shall  process all  exchanges in the usual manner as though they
were unrelated  purchases and sales. MFD may charge the shareholder a reasonable
amount for its services in effecting the exchange. MFD shall report daily to the
Funds  concerning  all exchanges made pursuant to this  Agreement.  MFD will not
seek  reimbursement from the Funds for any expenses incurred by it in connection
with any such purchases.
<PAGE>

         3.  Each of the Funds may, by written notice to each of the other Funds
and MFD, terminate its exchange offer provided by this Agreement and require MFD
and the other Funds to terminate the exchange  offer in respect of the shares of
the Fund so giving  notice.  MFD may by written notice to any Fund terminate its
services in effecting such exchanges on behalf of such Fund. The exchange offers
with  respect to shares of a Fund made by MFD to the  shareholders  of the other
Funds pursuant to this Agreement shall in any event be terminated effective upon
the  termination  of the  services of MFD as  distributor  of the shares of such
Fund.

         4.  Nothing in this Agreement shall modify or reduce the obligations of
a Fund or MFD contained in the distribution  agreement,  if any, between MFD and
such Fund as the same may from time to time be modified or amended.

         5.  To the extent that a Fund's current Prospectus contains  provisions
that  are  inconsistent  with  the  terms of this  Agreement,  the  terms of the
Prospectus shall be controlling.

         6.  This Agreement hereby supersedes all prior or contemporaneous
agreements between the parties hereto relating to the subject matter hereof.

         7.  The terms of this Agreement shall become effective as of the date
first above written.

         8.  A copy of the Declaration of Trust of each Fund is on file with the
Secretary of State of The Commonwealth of  Massachusetts.  MFD acknowledges that
the obligations of or arising out of this instrument are not binding upon any of
the Funds' trustees,  officers,  employees, agents or shareholders individually,
but are  binding  solely  upon the  assets  and  property  of the Fund.  If this
instrument  is  executed  by a Fund on behalf of one or more series of the Fund,
MFD further  acknowledges  that the assets and liabilities of each series of the
Fund are separate and  distinct  and that the  obligations  of or arising out of
this  instrument are binding solely upon the assets or property of the series on
whose behalf the Fund has executed this instrument.  If a Fund has executed this
instrument  on behalf of more than one series of the Fund,  MFD also agrees that
the  obligations  of each series  hereunder  shall be several and not joint,  in
accordance  with its  proportionate  interest  hereunder,  and MFD agrees not to
proceed against any series for the obligations of another series.

         IN WITNESS WHEREOF,  the parties hereto have executed this Agreement as
of the date first above  written  and caused  their seals to be affixed by their
representatives thereunto duly authorized.

MFS SERIES TRUST I

MFS SERIES TRUST II

MFS SERIES TRUST III

MFS SERIES TRUST IV

MFS SERIES TRUST V

MFS SERIES TRUST VI

MFS SERIES TRUST VII

MFS SERIES TRUST VIII

MFS SERIES TRUST IX

MFS SERIES TRUST X

MFS MUNICIPAL SERIES TRUST

MFS GROWTH OPPORTUNITIES FUND

MFS GOVERNMENT SECURITIES FUND

MASSACHUSETTS INVESTORS GROWTH STOCK FUND

MFS GOVERNMENT LIMITED MATURITY FUND

MASSACHUSETTS INVESTORS TRUST

                                       By:     A. KEITH BRODKIN
                                               A. Keith Brodkin
                                               Chairman


                                       MFS FUND DISTRIBUTORS, INC.


                                       By:     WILLIAM W. SCOTT, JR.
                                               William W. Scott, Jr.,
                                               President





<PAGE>

                                       November 28, 1995




MFS Series Trust X
500 Boylston Street
Boston, MA  02116

Re:  Post-Effective Amendment No. 13 to Registration Statement on Form N-1A
     (File No. 33-1657) (the "Registration Statement") for MFS Series Trust X
     (the "Trust") on Behalf of MFS Government Mortgage Fund

Gentlemen:

    I am Senior Counsel of Massachusetts Financial Services Company, which
serves as investment adviser to the Trust, and the Assistant Secretary Pro
Tempore of the Trust.  I am admitted to practice law in The Commonwealth of
Massachusetts.  The Trust was created under a written Declaration of Trust
dated November 18, 1985, and executed and delivered in Boston, Massachusetts,
as amended and restated January 19, 1995 and amended June 2, 1995 (the
"Declaration of Trust").  The beneficial  interest  thereunder is represented by
transferable shares without par value. The Trustees have the powers set forth in
the  Declaration  of Trust,  subject to the  terms,  provisions  and  conditions
therein provided.

    I am of the opinion that the legal requirements have been complied with in
the  creation  of the  Trust,  and that said  Declaration  of Trust is legal and
valid.

    Under Article III, Section 3.4 and Article VI, Section 6.4 of the
Declaration of Trust, the Trustees are empowered, in their discretion, from time
to time to issue shares of the Trust for such amount and type of  consideration,
at such time or times and on such terms as the  Trustees  may deem  best.  Under
Article VI,  Section 6.1, it is provided that the number of Shares of Beneficial
Interest  (without  par  value)  ("Shares")  authorized  to be issued  under the
Declaration of Trust is unlimited.

    By vote adopted on January 18, 1995, the Trustees of the Trust determined to
sell to the public the authorized but unissued shares of beneficial  interest of
the Trust for cash at a price which will net the Trust  (before  taxes) not less
than the net asset value thereof, as defined in the Trust's By-Laws,  determined
next after the sale is made or at some later time after such sale.
<PAGE>

    The Trust is about to register under the Securities Act of 1933, as amended,
58,685,834 shares of beneficial  interest by Post-Effective  Amendment No. 13 to
the Trust's Registration  Statement.  W. Thomas London,  Treasurer of the Trust,
has certified  that the Trust  received cash  consideration  for the issuance of
each of the Shares of the Trust sold during the  Trust's  fiscal year ended July
31, 1995,  including the 58,642,744 Shares which were sold in reliance upon Rule
24f-2 of the General Rules and Regulations  under the Investment  Company Act of
1940, as amended, at a price which netted the Trust (before taxes) not less than
the net asset value per share,  as defined in the Trust's  Declaration of Trust,
determined next after the sale was made.

    I am of the opinion that all necessary Trust action precedent to the issue
of the Shares of the Trust,  comprising  the  shares  covered by  Post-Effective
Amendment No. 13 to the Registration Statement has been duly taken, and that all
such shares may  legally  and validly be issued for cash,  and when sold will be
fully paid and nonassessable by the Trust upon receipt by the Trust or its agent
of  consideration  thereof  in  accordance  with  the  terms  described  in  the
Registration  Statement,  subject to compliance with the Securities Act of 1933,
the Investment Company Act of 1940 and applicable state laws regulating the sale
of securities.

    I consent to your filing this opinion with the Securities and Exchange
Commission as an exhibit to Post-Effective  Amendment No. 13 to the Registration
Statement.

                                       Very truly yours,



                                       JAMES F. DESMARAIS
                                       James F. DesMarais
                                       Assistant Secretary Pro Tempore

JFD/bjn

<PAGE>

                                                            EXHIBIT NO. 99.11


                              INDEPENDENT AUDITORS' CONSENT


         We consent to the  incorporation  by reference  in this  Post-Effective
Amendment No. 13 to Registration  Statement No. 33-1657 of MFS Series Trust X on
behalf of MFS  Government  Mortgage  Fund of our report dated  September 8, 1995
appearing in the annual report to shareholders  for the year ended July 31, 1995
of MFS Government  Mortgage Fund, and to the references to us under the headings
"Condensed Financial Information" in the Prospectus and "Independent Accountants
and Financial Statements" in the Statement of Additional Information,  which are
part of such Registration Statement.




/s/DELOITTE & TOUCHE, LLP
Boston, Massachusetts
November 27, 1995

<PAGE>
          
                                                              EXHIBIT NO. 99.13

                      MASSACHUSETTS FINANCIAL SERVICES COMPANY
                    200 BERKELEY STREET, BOSTON, MASSACHUSETTS
                                   617 423-3500




                                       December 13, 1986



MFS Goverment Securities High Yield Trust
200 Berkeley Street
Boston, Massachusetts  02116

Gentlemen:

         In connection with our purchase of 10,499 Shares of Beneficial Interest
(without par value) of MFS  Government  Securities  High Yield Trust,  we hereby
represent and warrant to you that we are purchasing said shares as an investment
with no intention  of  redeeming or reselling  said shares until a date at least
two years hereafter.

                                       Very truly yours,



                                       By:     RICHARD B. BAILEY
                                               Richard B. Bailey
                                               Chairman


<PAGE>
                                                         EXHIBIT NO. 99.15(c)


                               MFS SERIES TRUST X

                MFS/FOREIGN & COLONIAL INTERNATIONAL GROWTH FUND

                               DISTRIBUTION PLAN


DISTRIBUTION  PLAN with  respect  to the  shares of  beneficial  interest  to be
designated  "Class A" of the  MFS/Foreign & Colonial  International  Growth Fund
(the  "Fund"),  a series of MFS Series Trust X (the  "Trust"),  a  Massachusetts
business trust, dated the 1st of September, 1995.

                                  WITNESSETH:

WHEREAS,  the Trust is engaged in business as an open-end management  investment
company and is registered under the Investment  Company Act of 1940 (the "Act");
and

WHEREAS,  the Trust  intends to  distribute  the Shares of  Beneficial  Interest
(without par value) of the Fund designated Class A Shares (the "Shares") in part
in accordance with Rule 12b-1 under the Act ("Rule 12b-1"), and desires to adopt
this Distribution  Plan (the "Plan") as a plan of distribution  pursuant to such
Rule; and

WHEREAS, the Trust has entered into a distribution  agreement (the "Distribution
Agreement") in a form approved by the Board of Trustees of the Trust (the "Board
of Trustees") in the manner specified in Rule 12b-1, with MFS Fund Distributors,
Inc., a Delaware  corporation,  as distributor (the "Distributor"),  whereby the
Distributor  provides  facilities and personnel and renders services to the Fund
in connection with the offering and distribution of the Shares; and

WHEREAS,  the Trust  recognizes and agrees that the Distributor  will enter into
agreements  ("Dealer  Agreements")  with  various  securities  dealers and other
financial  intermediaries  ("Dealers") pursuant to which the Dealers will act as
dealers of the Shares in connection with the offering of Shares; and

WHEREAS, the Distribution  Agreement provides that a sales charge may be paid by
investors who purchase  Shares and that the Distributor and Dealers will receive
such sales charge as partial  compensation for their services in connection with
the sale of Shares; and
<PAGE>

WHEREAS, the Board of Trustees, in considering whether the Fund should adopt and
implement this Plan, has evaluated such information as it deemed necessary to an
informed determination as to whether this Plan should be adopted and implemented
and has  considered  such pertinent  factors as it deemed  necessary to form the
basis  for a  decision  to use  assets  of the Fund for such  purposes,  and has
determined  that  there  is  a  reasonable  likelihood  that  the  adoption  and
implementation of this Plan will benefit the Fund and its Class A shareholders;

NOW, THEREFORE,  the Board of Trustees hereby adopts this Plan for the Fund as a
plan of distribution  relating to the Shares in accordance with Rule 12b-1 under
the Act, on the following terms and conditions:

         1.  As specified in the Distribution Agreement,  the Distributor  shall
provide  facilities,  personnel  and a program  with respect to the offering and
sale of Shares. Among other things, the Distributor shall be responsible for any
ongoing maintenance  commissions to Dealers (excluding service fees described in
paragraph 4), all expenses of printing (excluding  typesetting) and distributing
prospectuses  to  prospective  shareholders  and  providing  such other  related
services as are reasonably necessary in connection therewith.

         2.  The  Distributor  shall  bear  all  distribution-related   expenses
described  in Section 1,  including  without  limitation,  the  compensation  of
personnel  necessary  to provide such  services and all costs of travel,  office
expenses  (including  rent and  overhead),  equipment,  printing,  delivery  and
mailing costs.

         3.  As partial consideration for the services performed as specified in
the  Distribution  Agreement  and expenses  incurred in the  performance  of its
obligations under the Distribution Agreement, the Fund shall pay the Distributor
a distribution  fee  periodically at a rate not to exceed 0.25% per annum of the
average daily net assets of the Fund  attributable to the Shares.  Such payments
shall  commence  following  shareholder  approval  of the  Plan  but  only  upon
notification by the Distributor to the Fund of the commencement of the Plan (the
"Commencement  Date"). All or a portion of the distribution fee paid by the Fund
to the Distributor may be paid by the Distributor to Dealers in consideration of
the Dealer's  services as a dealer of the Shares.  The Distributor may from time
to time establish minimum amount requirements and additional or different dealer
qualification  standards  or other  criteria to be met by dealers for payment of
any fee under this paragraph 3. It is understood that the  Distributor  may, but
is not  required  to, pay  reduced  fees or no fees under  this  paragraph  3 to
Dealers with respect to assets  represented  by Shares  that have  converted  
from  shares of beneficial interest of the Fund designated "Class B."

         4.  As partial consideration  for the personal  services and/or account
maintenance  services  performed  by  each  Dealer  in  the  performance  of its
obligations  under  its  Dealer  Agreement,  the  Fund  shall  on or  after  the
Commencement  Date pay each Dealer a service fee  periodically  at a rate not to
exceed  0.25% per annum of the  portion of the  average  daily net assets of the
Fund that is  represented  by Shares that are owned by  investors  for whom such
Dealer is the holder or dealer of record.  The Distributor may from time to time
reduce the amount of the  service  fee paid to a Dealer  with  respect to Shares
sold prior to a certain date.

         5.  In addition to fees payable pursuant to Sections 3 and 4 hereof,
the expenses  permitted to be paid by the Fund pursuant to this Plan on or after
the Commencement Date shall include other distribution  related expenses.  These
other  distribution  related  expenses  may  include,  but are not limited to, a
dealer  commission and a payment to wholesalers  employed by the  Distributor on
net asset value purchases at or above a certain dollar level.

         The  aggregate  amount of fees and expenses paid pursuant to Sections 3
and 4 hereof and this  Section 5 shall not exceed 0.50% per annum of the average
daily net assets of the Fund  attributable to the Shares.  No fees shall be paid
pursuant to Section 4 hereof or this Section 5 to any  insurance  company  which
has  entered  into an  agreement  with the  Trust on  behalf of the Fund and the
Distributor that permits such insurance company to purchase Shares from the Fund
at their  net  asset  value in  connection  with  annuity  agreements  issued in
connection with the insurance  company's separate accounts.  That portion of the
Fund's average daily net assets on which fees payable under Section 4 hereof and
this  Section  5 are  calculated  may  be  subject  to  certain  minimum  amount
requirements  as may be  determined,  and  additional  or  different  dealer  or
wholesaler qualification standards that may be established, from time to time by
the Distributor.  The Distributor  shall be entitled to be paid any fees payable
under  Section 4 hereof or this  Section 5 with respect to accounts for which no
Dealer of record exists or qualification  standards have not been met as partial
consideration for personal services and/or account maintenance services provided
by the  Distributor  to the Shares.  The fees and expenses  payable  pursuant to
Section  4 and this  Section  5 may from time to time be paid by the Fund to the
Distributor  and the  Distributor  will then pay these expenses on behalf of the
Fund.
<PAGE>

         6.  Nothing  herein  contained  shall be deemed to require the Trust to
take  any  action  contrary  to its  Declaration  of  Trust  or  By-Laws  or any
applicable  statutory  or  regulatory  requirement  to which it is subject or by
which it is  bound,  or to  relieve  or  deprive  the Board of  Trustees  of the
responsibility for and control of the conduct of the affairs of the Fund.

         7.  This Plan shall become effective  upon (a) approval by a vote of at
least a "majority of the outstanding  voting  securities" of the Shares, and (b)
approval  by a vote of the  Board  of  Trustees  and vote of a  majority  of the
Trustees who are not "interested persons" of the Trust and who have no direct or
indirect  financial  interest  in the  operation  of the  Plan  or in any of the
agreements related to the Plan (the "Qualified Trustees"), such votes to be cast
in person at a meeting called for the purpose of voting on this Plan.

         8.  This Plan shall continue in effect indefinitely; provided, however,
that such  continuance  is subject to annual  approval by a vote of the Board of
Trustees  and a majority  of the  Qualified  Trustees,  such votes to be cast in
person at a meeting  called  for the  purpose of voting on  continuance  of this
Plan. If such annual approval is not obtained,  this Plan shall expire 12 months
after the effective date of the last approval.

         9.  This  Plan may be  amended  at any time by the  Board of  Trustees;
provided,  however,  that (a) any amendment to increase materially the amount to
be spent for the services described herein shall be effective only upon approval
by a vote of a "majority of the outstanding voting securities" of the Shares and
(b) any material amendment of this Plan shall be effective only upon approval by
a vote of the Board of Trustees and a majority of the Qualified  Trustees,  such
votes to be cast in person at a meeting called for the purpose of voting on such
amendment.  This Plan may be terminated at any time by vote of a majority of the
Qualified  Trustees  or by a  vote  of a  "majority  of the  outstanding  voting
securities" of the Shares.

         10. The Distributor shall provide the Board of Trustees,  and the Board
of Trustees shall review,  at least  quarterly,  a written report of the amounts
expended under the Plan and the purposes for which such expenditures were made.

         11. While this Plan is in effect, the selection and nomination of
Qualified  Trustees shall be committed to the discretion of the Trustees who are
not "interested persons" of the Trust.

         12. For the purposes of this Plan, the terms "interested person" 
and "majority of the outstanding voting securities" are used as defined in the
Act. In addition, for purposes of determining the fees payable to Dealers and
wholesalers, the value of a Share's net assets shall be computed in the manner
specified in the Fund's then current prospectus for computation of the net asset
value of the Shares.

         13. The Trust shall  preserve  copies of this Plan,  and each agreement
related hereto and each report  referred to in Section 10 hereof  (collectively,
the  "Records")  for a period of six years  from the end of the  fiscal  year in
which  such  Record  was made and each  such  Record  shall be kept in an easily
accessible place for the first two years of said record keeping.

         14. This Plan shall be construed in accordance with the laws of The
Commonwealth of Massachusetts and the applicable provisions of the 1940 Act.

         15. If any  provision  of this Plan shall be held or made  invalid by a
court decision,  statute, rule or otherwise, the remainder of the Plan shall not
be affected thereby.

<PAGE>
                                                           EXHIBIT NO. 99.15(d)


                               MFS SERIES TRUST X

          MFS/FOREIGN & COLONIAL INTERNATIONAL GROWTH AND INCOME FUND

                               DISTRIBUTION PLAN


DISTRIBUTION  PLAN with  respect  to the  shares of  beneficial  interest  to be
designated  "Class A" of the  MFS/Foreign  & Colonial  International  Growth and
Income  Fund (the  "Fund"),  a series of MFS  Series  Trust X (the  "Trust"),  a
Massachusetts business trust, dated the 1st day of September, 1995.

                                  WITNESSETH:

WHEREAS,  the Trust is engaged in business as an open-end management  investment
company and is registered under the Investment  Company Act of 1940 (the "Act");
and

WHEREAS,  the Trust  intends to  distribute  the Shares of  Beneficial  Interest
(without par value) of the Fund designated Class A Shares (the "Shares") in part
in accordance with Rule 12b-1 under the Act ("Rule 12b-1"), and desires to adopt
this Distribution  Plan (the "Plan") as a plan of distribution  pursuant to such
Rule; and

WHEREAS, the Trust has entered into a distribution  agreement (the "Distribution
Agreement") in a form approved by the Board of Trustees of the Trust (the "Board
of Trustees") in the manner specified in Rule 12b-1, with MFS Fund Distributors,
Inc., a Delaware  corporation,  as distributor (the "Distributor"),  whereby the
Distributor  provides  facilities and personnel and renders services to the Fund
in connection with the offering and distribution of the Shares; and

WHEREAS,  the Trust  recognizes and agrees that the Distributor  will enter into
agreements  ("Dealer  Agreements")  with  various  securities  dealers and other
financial  intermediaries  ("Dealers") pursuant to which the Dealers will act as
dealers of the Shares in connection with the offering of Shares; and
<PAGE>

WHEREAS, the Distribution  Agreement provides that a sales charge may be paid by
investors who purchase  Shares and that the Distributor and Dealers will receive
such sales charge as partial  compensation for their services in connection with
the sale of Shares; and

WHEREAS, the Board of Trustees, in considering whether the Fund should adopt and
implement this Plan, has evaluated such information as it deemed necessary to an
informed determination as to whether this Plan should be adopted and implemented
and has  considered  such pertinent  factors as it deemed  necessary to form the
basis  for a  decision  to use  assets  of the Fund for such  purposes,  and has
determined  that  there  is  a  reasonable  likelihood  that  the  adoption  and
implementation of this Plan will benefit the Fund and its Class A shareholders;

NOW, THEREFORE,  the Board of Trustees hereby adopts this Plan for the Fund as a
plan of distribution  relating to the Shares in accordance with Rule 12b-1 under
the Act, on the following terms and conditions:

         1.  As specified in the Distribution Agreement,  the Distributor  shall
provide  facilities,  personnel  and a program  with respect to the offering and
sale of Shares. Among other things, the Distributor shall be responsible for any
ongoing maintenance  commissions to Dealers (excluding service fees described in
paragraph 4), all expenses of printing (excluding  typesetting) and distributing
prospectuses  to  prospective  shareholders  and  providing  such other  related
services as are reasonably necessary in connection therewith.

         2.  The  Distributor  shall  bear  all  distribution-related   expenses
described  in Section 1,  including  without  limitation,  the  compensation  of
personnel  necessary  to provide such  services and all costs of travel,  office
expenses  (including  rent and  overhead),  equipment,  printing,  delivery  and
mailing costs.

         3.  As partial consideration for the services performed as specified in
the  Distribution  Agreement  and expenses  incurred in the  performance  of its
obligations under the Distribution Agreement, the Fund shall pay the Distributor
a distribution  fee  periodically at a rate not to exceed 0.25% per annum of the
average daily net assets of the Fund  attributable to the Shares.  Such payments
shall  commence  following  shareholder  approval  of the  Plan  but  only  upon
notification by the Distributor to the Fund of the commencement of the Plan (the
"Commencement  Date"). All or a portion of the distribution fee paid by the Fund
to the Distributor may be paid by the Distributor to Dealers in consideration of
the Dealer's  services as a dealer of the Shares.  The Distributor may from time
to time establish minimum amount
<PAGE>
requirements and additional or different dealer qualification standards or other
criteria to be met by dealers for payment of any fee under this  paragraph 3. It
is understood that the Distributor may, but is not required to, pay reduced fees
or no fees under this paragraph 3 to Dealers with respect to assets  represented
by Shares that have  converted  from shares of  beneficial  interest of the Fund
designated "Class B."

         4.  As partial consideration  for the personal  services and/or account
maintenance  services  performed  by  each  Dealer  in  the  performance  of its
obligations  under  its  Dealer  Agreement,  the  Fund  shall  on or  after  the
Commencement  Date pay each Dealer a service fee  periodically  at a rate not to
exceed  0.25% per annum of the  portion of the  average  daily net assets of the
Fund that is  represented  by Shares that are owned by  investors  for whom such
Dealer is the holder or dealer of record.  The Distributor may from time to time
reduce the amount of the  service  fee paid to a Dealer  with  respect to Shares
sold prior to a certain date.

         5.  In addition to fees payable pursuant to Sections 3 and 4 hereof,
the expenses  permitted to be paid by the Fund pursuant to this Plan on or after
the Commencement Date shall include other distribution  related expenses.  These
other  distribution  related  expenses  may  include,  but are not limited to, a
dealer  commission and a payment to wholesalers  employed by the  Distributor on
net asset value purchases at or above a certain dollar level.

         The  aggregate  amount of fees and expenses paid pursuant to Sections 3
and 4 hereof and this  Section 5 shall not exceed 0.50% per annum of the average
daily net assets of the Fund  attributable to the Shares.  No fees shall be paid
pursuant to Section 4 hereof or this Section 5 to any  insurance  company  which
has  entered  into an  agreement  with the  Trust on  behalf of the Fund and the
Distributor that permits such insurance company to purchase Shares from the Fund
at their  net  asset  value in  connection  with  annuity  agreements  issued in
connection with the insurance  company's separate accounts.  That portion of the
Fund's average daily net assets on which fees payable under Section 4 hereof and
this  Section  5 are  calculated  may  be  subject  to  certain  minimum  amount
requirements  as may be  determined,  and  additional  or  different  dealer  or
wholesaler qualification standards that may be established, from time to time by
the Distributor.  The Distributor  shall be entitled to be paid any fees payable
under  Section 4 hereof or this  Section 5 with respect to accounts for which no
Dealer of record exists or qualification  standards have not been met as partial
consideration for personal services and/or account maintenance services provided
by the  Distributor  to the Shares.  The fees and expenses  payable  pursuant to
Section  4 and this  Section  5 may from time to time be paid by the Fund to the
Distributor  and the  Distributor  will then pay these expenses on behalf of the
Fund.
<PAGE>

         6.  Nothing  herein  contained  shall be deemed to require the Trust to
take  any  action  contrary  to its  Declaration  of  Trust  or  By-Laws  or any
applicable  statutory  or  regulatory  requirement  to which it is subject or by
which it is  bound,  or to  relieve  or  deprive  the Board of  Trustees  of the
responsibility for and control of the conduct of the affairs of the Fund.

         7.  This Plan shall become effective upon (a) approval by a vote of at
least a "majority of the outstanding  voting  securities" of the Shares, and (b)
approval  by a vote of the  Board  of  Trustees  and vote of a  majority  of the
Trustees who are not "interested persons" of the Trust and who have no direct or
indirect  financial  interest  in the  operation  of the  Plan  or in any of the
agreements related to the Plan (the "Qualified Trustees"), such votes to be cast
in person at a meeting called for the purpose of voting on this Plan.

         8.  This Plan shall continue in effect indefinitely; provided, however,
that such  continuance  is subject to annual  approval by a vote of the Board of
Trustees  and a majority  of the  Qualified  Trustees,  such votes to be cast in
person at a meeting  called  for the  purpose of voting on  continuance  of this
Plan. If such annual approval is not obtained,  this Plan shall expire 12 months
after the effective date of the last approval.

         9.  This  Plan may be  amended  at any time by the  Board of  Trustees;
provided,  however,  that (a) any amendment to increase materially the amount to
be spent for the services described herein shall be effective only upon approval
by a vote of a "majority of the outstanding voting securities" of the Shares and
(b) any material amendment of this Plan shall be effective only upon approval by
a vote of the Board of Trustees and a majority of the Qualified  Trustees,  such
votes to be cast in person at a meeting called for the purpose of voting on such
amendment.  This Plan may be terminated at any time by vote of a majority of the
Qualified  Trustees  or by a  vote  of a  "majority  of the  outstanding  voting
securities" of the Shares.

         10. The Distributor shall provide the Board of Trustees,  and the Board
of Trustees shall review,  at least  quarterly,  a written report of the amounts
expended under the Plan and the purposes for which such expenditures were made.

         11. While this Plan is in effect, the selection and nomination of
Qualified Trustees shall be committed to the discretion of the Trustees who are
not "interested persons" of the Trust.
<PAGE>

         12. For the purposes of this Plan,  the terms  "interested  person" and
"majority of the outstanding  voting securities" are used as defined in the Act.
In  addition,  for  purposes  of  determining  the fees  payable to Dealers  and
wholesalers,  the value of a Share's net assets  shall be computed in the manner
specified in the Fund's then current prospectus for computation of the net asset
value of the Shares.

         13. The Trust shall  preserve  copies of this Plan,  and each agreement
related hereto and each report  referred to in Section 10 hereof  (collectively,
the  "Records")  for a period of six years  from the end of the  fiscal  year in
which  such  Record  was made and each  such  Record  shall be kept in an easily
accessible place for the first two years of said record keeping.

         14. This Plan shall be construed in accordance with the laws of The
Commonwealth of Massachusetts and the applicable provisions of the 1940 Act.

         15. If any  provision  of this Plan shall be held or made  invalid by a
court decision,  statute, rule or otherwise, the remainder of the Plan shall not
be affected thereby.

<PAGE>
                                                        EXHIBIT NO. 99.15(e)


                               MFS SERIES TRUST X

              MFS/FOREIGN & COLONIAL EMERGING MARKETS EQUITY FUND

                               DISTRIBUTION PLAN


DISTRIBUTION  PLAN with  respect  to the  shares of  beneficial  interest  to be
designated  "Class A" of the MFS/Foreign & Colonial Emerging Markets Equity Fund
(the  "Fund"),  a series of MFS Series Trust X (the  "Trust"),  a  Massachusetts
business trust, dated the 1st of September, 1995.

                                  WITNESSETH:

WHEREAS,  the Trust is engaged in business as an open-end management  investment
company and is registered under the Investment  Company Act of 1940 (the "Act");
and

WHEREAS,  the Trust  intends to  distribute  the Shares of  Beneficial  Interest
(without par value) of the Fund designated Class A Shares (the "Shares") in part
in accordance with Rule 12b-1 under the Act ("Rule 12b-1"), and desires to adopt
this Distribution  Plan (the "Plan") as a plan of distribution  pursuant to such
Rule; and

WHEREAS, the Trust has entered into a distribution  agreement (the "Distribution
Agreement") in a form approved by the Board of Trustees of the Trust (the "Board
of Trustees") in the manner specified in Rule 12b-1, with MFS Fund Distributors,
Inc., a Delaware  corporation,  as distributor (the "Distributor"),  whereby the
Distributor  provides  facilities and personnel and renders services to the Fund
in connection with the offering and distribution of the Shares; and

WHEREAS,  the Trust  recognizes and agrees that the Distributor  will enter into
agreements  ("Dealer  Agreements")  with  various  securities  dealers and other
financial  intermediaries  ("Dealers") pursuant to which the Dealers will act as
dealers of the Shares in connection with the offering of Shares; and
<PAGE>

WHEREAS, the Distribution  Agreement provides that a sales charge may be paid by
investors who purchase  Shares and that the Distributor and Dealers will receive
such sales charge as partial  compensation for their services in connection with
the sale of Shares; and

WHEREAS, the Board of Trustees, in considering whether the Fund should adopt and
implement this Plan, has evaluated such information as it deemed necessary to an
informed determination as to whether this Plan should be adopted and implemented
and has  considered  such pertinent  factors as it deemed  necessary to form the
basis  for a  decision  to use  assets  of the Fund for such  purposes,  and has
determined  that  there  is  a  reasonable  likelihood  that  the  adoption  and
implementation of this Plan will benefit the Fund and its Class A shareholders;

NOW, THEREFORE,  the Board of Trustees hereby adopts this Plan for the Fund as a
plan of distribution  relating to the Shares in accordance with Rule 12b-1 under
the Act, on the following terms and conditions:

         1.  As specified in the Distribution  Agreement, the Distributor shall
provide  facilities,  personnel  and a program  with respect to the offering and
sale of Shares. Among other things, the Distributor shall be responsible for any
ongoing maintenance  commissions to Dealers (excluding service fees described in
paragraph 4), all expenses of printing (excluding  typesetting) and distributing
prospectuses  to  prospective  shareholders  and  providing  such other  related
services as are reasonably necessary in connection therewith.

         2.  The  Distributor  shall  bear  all  distribution-related   expenses
described  in Section 1,  including  without  limitation,  the  compensation  of
personnel  necessary  to provide such  services and all costs of travel,  office
expenses  (including  rent and  overhead),  equipment,  printing,  delivery  and
mailing costs.

         3.  As partial consideration for the services performed as specified in
the  Distribution  Agreement  and expenses  incurred in the  performance  of its
obligations under the Distribution Agreement, the Fund shall pay the Distributor
a distribution  fee  periodically at a rate not to exceed 0.25% per annum of the
average daily net assets of the Fund  attributable to the Shares.  Such payments
shall  commence  following  shareholder  approval  of the  Plan  but  only  upon
notification by the Distributor to the Fund of the commencement of the Plan (the
"Commencement  Date"). All or a portion of the distribution fee paid by the Fund
to the Distributor may be paid by the Distributor to Dealers in consideration of
the Dealer's  services as a dealer of the Shares.  The Distributor may from time
to time establish minimum amount
<PAGE>
requirements and additional or different dealer qualification standards or other
criteria to be met by dealers for payment of any fee under this  paragraph 3. It
is understood that the Distributor may, but is not required to, pay reduced fees
or no fees under this paragraph 3 to Dealers with respect to assets  represented
by Shares that have  converted  from shares of  beneficial  interest of the Fund
designated "Class B."

         4.  As partial consideration  for the personal  services and/or account
maintenance  services  performed  by  each  Dealer  in  the  performance  of its
obligations  under  its  Dealer  Agreement,  the  Fund  shall  on or  after  the
Commencement  Date pay each Dealer a service fee  periodically  at a rate not to
exceed  0.25% per annum of the  portion of the  average  daily net assets of the
Fund that is  represented  by Shares that are owned by  investors  for whom such
Dealer is the holder or dealer of record.  The Distributor may from time to time
reduce the amount of the  service  fee paid to a Dealer  with  respect to Shares
sold prior to a certain date.

         5.  In addition to fees payable pursuant to Sections 3 and 4 hereof,
the expenses  permitted to be paid by the Fund pursuant to this Plan on or after
the Commencement Date shall include other distribution  related expenses.  These
other  distribution  related  expenses  may  include,  but are not limited to, a
dealer  commission and a payment to wholesalers  employed by the  Distributor on
net asset value purchases at or above a certain dollar level.

         The  aggregate  amount of fees and expenses paid pursuant to Sections 3
and 4 hereof and this  Section 5 shall not exceed 0.50% per annum of the average
daily net assets of the Fund  attributable to the Shares.  No fees shall be paid
pursuant to Section 4 hereof or this Section 5 to any  insurance  company  which
has  entered  into an  agreement  with the  Trust on  behalf of the Fund and the
Distributor that permits such insurance company to purchase Shares from the Fund
at their  net  asset  value in  connection  with  annuity  agreements  issued in
connection with the insurance  company's separate accounts.  That portion of the
Fund's average daily net assets on which fees payable under Section 4 hereof and
this  Section  5 are  calculated  may  be  subject  to  certain  minimum  amount
requirements  as may be  determined,  and  additional  or  different  dealer  or
wholesaler qualification standards that may be established, from time to time by
the Distributor.  The Distributor  shall be entitled to be paid any fees payable
under  Section 4 hereof or this  Section 5 with respect to accounts for which no
Dealer of record exists or qualification  standards have not been met as partial
consideration for personal services and/or account maintenance services provided
by the  Distributor  to the Shares.  The fees and expenses  payable  pursuant to
Section  4 and this  Section  5 may from time to time be paid by the Fund to the
Distributor  and the  Distributor  will then pay these expenses on behalf of the
Fund.
<PAGE>

         6.  Nothing  herein  contained  shall be deemed to require the Trust to
take  any  action  contrary  to its  Declaration  of  Trust  or  By-Laws  or any
applicable  statutory  or  regulatory  requirement  to which it is subject or by
which it is  bound,  or to  relieve  or  deprive  the Board of  Trustees  of the
responsibility for and control of the conduct of the affairs of the Fund.

         7.  This Plan shall become effective  upon (a) approval by a vote of at
least a "majority of the outstanding  voting  securities" of the Shares, and (b)
approval  by a vote of the  Board  of  Trustees  and vote of a  majority  of the
Trustees who are not "interested persons" of the Trust and who have no direct or
indirect  financial  interest  in the  operation  of the  Plan  or in any of the
agreements related to the Plan (the "Qualified Trustees"), such votes to be cast
in person at a meeting called for the purpose of voting on this Plan.

         8.  This Plan shall continue in effect indefinitely; provided, however,
that such  continuance  is subject to annual  approval by a vote of the Board of
Trustees  and a majority  of the  Qualified  Trustees,  such votes to be cast in
person at a meeting  called  for the  purpose of voting on  continuance  of this
Plan. If such annual approval is not obtained,  this Plan shall expire 12 months
after the effective date of the last approval.

         9.  This Plan may be  amended  at any time by the  Board of  Trustees;
provided,  however,  that (a) any amendment to increase materially the amount to
be spent for the services described herein shall be effective only upon approval
by a vote of a "majority of the outstanding voting securities" of the Shares and
(b) any material amendment of this Plan shall be effective only upon approval by
a vote of the Board of Trustees and a majority of the Qualified  Trustees,  such
votes to be cast in person at a meeting called for the purpose of voting on such
amendment.  This Plan may be terminated at any time by vote of a majority of the
Qualified  Trustees  or by a  vote  of a  "majority  of the  outstanding  voting
securities" of the Shares.

         10. The Distributor shall provide the Board of Trustees,  and the Board
of Trustees shall review,  at least  quarterly,  a written report of the amounts
expended under the Plan and the purposes for which such expenditures were made.

         11. While this Plan is in effect, the selection and nomination
of Qualified Trustees shall be committed to the discretion of the Trustees who
are not "interested persons" of the Trust.
<PAGE>

         12. For the purposes of this Plan,  the terms  "interested  person" and
"majority of the outstanding  voting securities" are used as defined in the Act.
In  addition,  for  purposes  of  determining  the fees  payable to Dealers  and
wholesalers,  the value of a Share's net assets  shall be computed in the manner
specified in the Fund's then current prospectus for computation of the net asset
value of the Shares.

         13. The Trust shall  preserve  copies of this Plan,  and each agreement
related hereto and each report  referred to in Section 10 hereof  (collectively,
the  "Records")  for a period of six years  from the end of the  fiscal  year in
which  such  Record  was made and each  such  Record  shall be kept in an easily
accessible place for the first two years of said record keeping.

         14. This Plan shall be construed in accordance with the laws of The
Commonwealth of Massachusetts and the applicable provisions of the 1940 Act.

         15. If any  provision  of this Plan shall be held or made  invalid by a
court decision,  statute, rule or otherwise, the remainder of the Plan shall not
be affected thereby.

<PAGE>
                                                          EXHIBIT NO. 99.15(f)


                               MFS SERIES TRUST X
                MFS/FOREIGN & COLONIAL INTERNATIONAL GROWTH FUND
                              PLAN OF DISTRIBUTION

PLAN OF  DISTRIBUTION  with respect to the shares of  beneficial  interest to be
designated  "Class B" of the  MFS/Foreign & Colonial  International  Growth Fund
(the  "Fund"),  a series of MFS Series Trust X (the  "Trust"),  a  Massachusetts
business trust, dated the 1st day of September, 1995.

                                  WITNESSETH:

WHEREAS,  the Trust is engaged in business as an open-end management  investment
company and is registered  under the Investment  Company Act of 1940, as amended
(collectively with the rules and regulations promulgated  thereunder,  the "1940
Act"); and

WHEREAS,  the Trust  intends to  distribute  the shares of  beneficial  interest
(without  par value) of the Fund  designated  Class B Shares (the  "Shares")  in
accordance  with Rule 12b-1  under the 1940 Act ("Rule  12b-1"),  and desires to
adopt this Distribution Plan (the "Plan") as a plan of distribution  pursuant to
such Rule; and

WHEREAS,  the  Trust  desires  for  MFS  Fund  Distributors,  Inc.,  a  Delaware
corporation,  to  provide  certain  distribution  services  for  the  Fund  (the
"Distributor"); and

WHEREAS, the Trust has entered into a distribution  agreement (the "Distribution
Agreement")  (in a form  approved  by the  Board of  Trustees  of the Trust in a
manner  specified  in  such  Rule  12b-1)  with  the  Distributor,  whereby  the
Distributor  will provide  facilities  and personnel and render  services to the
Fund in connection with the offering and distribution of the Shares; and

WHEREAS, the Trust recognizes and agrees that (a) the Distributor may retain the
services of firms or individuals to act as dealers (the "Dealers") of the Shares
in  connection  with the offering of Shares,  and (b) the  Distributor  may make
payments for such services to the Dealers out of the fee paid to the Distributor
hereunder,  any deferred sales charges  imposed by the Distributor in connection
with the repurchase of Shares,  its profits or any other source available to it;
and
<PAGE>

WHEREAS, the Trust recognizes and agrees that the Distributor may impose certain
deferred sales charges in connection  with the repurchase of Shares by the Fund,
and the  Distributor  may retain (or receive from the Fund,  as the case may be)
all such deferred sales charges; and

WHEREAS,  the Board of Trustees of the Trust,  in  considering  whether the Fund
should adopt and implement  this Plan,  has  evaluated  such  information  as it
deemed necessary to an informed  determination as to whether this Plan should be
adopted and implemented  and has considered such pertinent  factors as it deemed
necessary  to form the basis for a  decision  to use assets of the Fund for such
purposes,  and has  determined  that there is a reasonable  likelihood  that the
adoption and  implementation  of this Plan will benefit the Fund and its Class B
shareholders;

NOW,  THEREFORE,  the Board of Trustees of the Trust hereby adopts this Plan for
the Fund as a plan for  distribution  relating to the Shares in accordance  with
Rule 12b-1, on the following terms and conditions:

1. As specified in the  Distribution  Agreement,  the Distributor  shall provide
facilities,  personnel  and a program  with  respect to the offering and sale of
Shares. Among other things, the Distributor shall be responsible for commissions
payable to  Dealers,  all  expenses  of  printing  (excluding  typesetting)  and
distributing  prospectuses to prospective  shareholders and providing such other
related services as are reasonably necessary in connection therewith.

2. The Distributor  shall bear all  distribution-related  expenses to the extent
specified in the Distribution  Agreement in providing the services  described in
paragraph  1,  including  without  limitation,  the  compensation  of  personnel
necessary to provide  such  services  and all costs of travel,  office  expenses
(including rent and overhead), equipment, printing, delivery and mailing costs.

3. It is understood  that the  Distributor  may impose  certain  deferred  sales
charges  in  connection  with  the  repurchase  of  Shares  by the  Fund and the
Distributor  may retain (or receive from the Fund,  as the case may be) all such
deferred sales charges.  As additional  consideration for all services performed
and  expenses   incurred  in  the  performance  of  its  obligations  under  the
Distribution  Agreement,  the Fund shall pay the Distributor a distribution  fee
periodically at a rate of 0.75% per annum of the Fund's average daily net assets
attributable to the shares.

4. As partial consideration for the personal services and/or account maintenance
services  performed by each Dealer in the performance of its  obligations  under
its dealer  agreement  with
<PAGE>
the Distributor,  the Fund shall pay each Dealer a service fee periodically at a
rate not to exceed  0.25%  per annum of the  portion  of the  average  daily net
assets of the Fund that is represented by Shares that are owned by investors for
whom such Dealer is the holder or dealer of record.  That  portion of the Fund's
average daily net assets on which the fees payable under this paragraph 4 hereof
are calculated may be subject to certain  minimum amount  requirements as may be
determined,  and additional or different dealer qualification standards that may
be established from time to time, by the Distributor.  The Distributor  shall be
entitled to be paid any fees payable under this  paragraph 4 hereof with respect
to Shares for which no Dealer of record exists or  qualification  standards have
not been met as partial  consideration  for  personal  services  and/or  account
maintenance  services provided by the Distributor to the Shares. The service fee
payable  pursuant to this  paragraph 4 may from time to time be paid by the Fund
to the Distributor and the Distributor will then pay these fees on behalf of the
Fund.

5. The Fund understands that agreements  between the Distributor and the Dealers
may provide for payment of commissions  to Dealers in connection  with the sales
of Shares and may provide for a portion (which may be all or substantially  all)
of the  fees  payable  by the Fund to the  Distributor  under  the  Distribution
Agreement to be paid by the  Distributor  to the Dealers in  consideration  of a
Dealer's services as a dealer of the Shares. Except as described in paragraph 4,
nothing  in this  Plan  shall be  construed  as  requiring  the Fund to make any
payment to any  Dealer or to have any  obligations  to any Dealer in  connection
with  services  as a dealer  of the  Shares.  The  Distributor  shall  agree and
undertake that any agreement entered into between the Distributor and any Dealer
shall  provide  that,  except as provided in paragraph 4, such Dealer shall look
solely to the Distributor for compensation for its services  thereunder and that
in no event shall such Dealer seek any payment from the Fund.

6. The Fund shall pay all fees and expenses of any  independent  auditor,  legal
counsel,   investment  adviser,   administrator,   transfer  agent,   custodian,
shareholder servicing agent, registrar or dividend disbursing agent of the Fund;
expenses  of  distributing  and  redeeming  Shares  and  servicing   shareholder
accounts; expenses of preparing, printing and mailing prospectuses,  shareholder
reports,  notices,  proxy  statements and reports to  governmental  officers and
commissions and to shareholders of the Fund,  except that the Distributor  shall
be responsible for the distribution-related expenses as provided in paragraphs 1
and 2 hereof.

7.  Nothing  herein  contained  shall be deemed to require the Trust to take any
action  contrary  to its  Declaration  of Trust  or  By-Laws  or any  applicable
statutory  or  regulatory  requirement
<PAGE>
to which it is  subject or by which it is bound,  or to  relieve or deprive  the
Board of  Trustees of the  responsibility  for and control of the conduct of the
affairs of the Fund.

8. This Plan shall  become  effective  upon (a) approval by a vote of at least a
"majority of the outstanding  voting securities" of the Shares, and (b) approval
by a vote of the Board of Trustees  and a vote of a majority of the Trustees who
are not  "interested  persons"  of the Trust and who have no direct or  indirect
financial  interest in the operation of the Plan or in any agreement  related to
the Plan  (the  "Qualified  Trustees"),  such  votes to be cast in  person  at a
meeting called for the purpose of voting on this Plan.

9. This Plan shall continue in effect indefinitely; provided, however, that such
continuance  is  "specifically  approved at least  annually" by a vote of both a
majority of the Trustees of the Trust and a majority of the Qualified  Trustees.
If such annual approval is not obtained,  this Plan shall expire 12 months after
the effective date of the last approval.

10.  This Plan may be  amended at any time by the Board of  Trustees;  provided,
however,  that this Plan may not be amended to increase materially the amount of
permitted  expenses  hereunder without the approval of holders of a "majority of
the  outstanding  voting  securities"  of the Shares  and may not be  materially
amended in any case  without a vote of a majority of both the  Trustees  and the
Qualified  Trustees.  This  Plan  may be  terminated  at any time by a vote of a
majority of the Qualified Trustees or by a vote of the holders of a "majority of
the outstanding voting securities" of the Shares.

11. The Fund and the  Distributor  shall provide the Board of Trustees,  and the
Board of Trustees  shall review,  at least  quarterly,  a written  report of the
amounts  expended  under this Plan and the purposes for which such  expenditures
were made.

12. While this Plan is in effect,  the  selection  and  nomination  of Qualified
Trustees  shall be  committed  to the  discretion  of the  Trustees  who are not
"interested persons" of the Trust.

13. For the purposes of this Plan, the terms "interested persons",  "majority of
the outstanding voting securities" and "specifically approved at least annually"
are used as defined in the 1940 Act. In addition,  for  purposes of  determining
the fees  payable  to the  Distributor  hereunder,  the value of the  Fund's net
assets  shall be computed  in the manner  specified  in the Fund's  then-current
prospectus and statement of additional  information  for  computation of the net
asset value of the Shares of the Fund.
<PAGE>

14. The Trust shall preserve  copies of this Plan,  and each  agreement  related
hereto and each report  referred to in  paragraph 11 hereof  (collectively,  the
"Records")  for a period of six years from the end of the  fiscal  year in which
such Record was made and each such record shall be kept in an easily  accessible
place for the first two years of said record-keeping.

15. This Plan shall be construed in accordance with the laws of The Commonwealth
of Massachusetts and the applicable provisions of the 1940 Act.

16. If any  provision  of this  Plan  shall be held or made  invalid  by a court
decision,  statute,  rule or  otherwise,  the remainder of the Plan shall not be
affected thereby.

<PAGE>
                                                              EXHIBIT NO. 15(g)


                               MFS SERIES TRUST X
          MFS/FOREIGN & COLONIAL INTERNATIONAL GROWTH AND INCOME FUND
                              PLAN OF DISTRIBUTION

PLAN OF  DISTRIBUTION  with respect to the shares of  beneficial  interest to be
designated  "Class B" of the  MFS/Foreign  & Colonial  International  Growth and
Income  Fund (the  "Fund"),  a series of MFS  Series  Trust X (the  "Trust"),  a
Massachusetts business trust, dated the 1st day of September, 1995.

                                  WITNESSETH:

WHEREAS,  the Trust is engaged in business as an open-end management  investment
company and is registered  under the Investment  Company Act of 1940, as amended
(collectively with the rules and regulations promulgated  thereunder,  the "1940
Act"); and

WHEREAS,  the Trust  intends to  distribute  the shares of  beneficial  interest
(without  par value) of the Fund  designated  Class B Shares (the  "Shares")  in
accordance  with Rule 12b-1  under the 1940 Act ("Rule  12b-1"),  and desires to
adopt this Distribution Plan (the "Plan") as a plan of distribution  pursuant to
such Rule; and

WHEREAS,  the  Trust  desires  for  MFS  Fund  Distributors,  Inc.,  a  Delaware
corporation,  to  provide  certain  distribution  services  for  the  Fund  (the
"Distributor"); and

WHEREAS, the Trust has entered into a distribution  agreement (the "Distribution
Agreement")  (in a form  approved  by the  Board of  Trustees  of the Trust in a
manner  specified  in  such  Rule  12b-1)  with  the  Distributor,  whereby  the
Distributor  will provide  facilities  and personnel and render  services to the
Fund in connection with the offering and distribution of the Shares; and

WHEREAS, the Trust recognizes and agrees that (a) the Distributor may retain the
services of firms or individuals to act as dealers (the "Dealers") of the Shares
in  connection  with the offering of Shares,  and (b) the  Distributor  may make
payments for such services to the Dealers out of the fee paid to the Distributor
hereunder,  any deferred sales charges  imposed by the Distributor in connection
with the repurchase of Shares,  its profits or any other source available to it;
and
<PAGE>

WHEREAS, the Trust recognizes and agrees that the Distributor may impose certain
deferred sales charges in connection  with the repurchase of Shares by the Fund,
and the  Distributor  may retain (or receive from the Fund,  as the case may be)
all such deferred sales charges; and

WHEREAS,  the Board of Trustees of the Trust,  in  considering  whether the Fund
should adopt and implement  this Plan,  has  evaluated  such  information  as it
deemed necessary to an informed  determination as to whether this Plan should be
adopted and implemented  and has considered such pertinent  factors as it deemed
necessary  to form the basis for a  decision  to use assets of the Fund for such
purposes,  and has  determined  that there is a reasonable  likelihood  that the
adoption and  implementation  of this Plan will benefit the Fund and its Class B
shareholders;

NOW,  THEREFORE,  the Board of Trustees of the Trust hereby adopts this Plan for
the Fund as a plan for  distribution  relating to the Shares in accordance  with
Rule 12b-1, on the following terms and conditions:

1. As specified in the  Distribution  Agreement,  the Distributor  shall provide
facilities,  personnel  and a program  with  respect to the offering and sale of
Shares. Among other things, the Distributor shall be responsible for commissions
payable to  Dealers,  all  expenses  of  printing  (excluding  typesetting)  and
distributing  prospectuses to prospective  shareholders and providing such other
related services as are reasonably necessary in connection therewith.

2. The Distributor  shall bear all  distribution-related  expenses to the extent
specified in the Distribution  Agreement in providing the services  described in
paragraph  1,  including  without  limitation,  the  compensation  of  personnel
necessary to provide  such  services  and all costs of travel,  office  expenses
(including rent and overhead), equipment, printing, delivery and mailing costs.

3. It is understood  that the  Distributor  may impose  certain  deferred  sales
charges  in  connection  with  the  repurchase  of  Shares  by the  Fund and the
Distributor  may retain (or receive from the Fund,  as the case may be) all such
deferred sales charges.  As additional  consideration for all services performed
and  expenses   incurred  in  the  performance  of  its  obligations  under  the
Distribution  Agreement,  the Fund shall pay the Distributor a distribution  fee
periodically at a rate of 0.75% per annum of the Fund's average daily net assets
attributable to the shares.

4. As partial consideration for the personal services and/or account maintenance
services  performed by each Dealer in the performance of its  obligations  under
its dealer  agreement  with
<PAGE>
the Distributor,  the Fund shall pay each Dealer a service fee periodically at a
rate not to exceed  0.25%  per annum of the  portion  of the  average  daily net
assets of the Fund that is represented by Shares that are owned by investors for
whom such Dealer is the holder or dealer of record.  That  portion of the Fund's
average daily net assets on which the fees payable under this paragraph 4 hereof
are calculated may be subject to certain  minimum amount  requirements as may be
determined,  and additional or different dealer qualification standards that may
be established from time to time, by the Distributor.  The Distributor  shall be
entitled to be paid any fees payable under this  paragraph 4 hereof with respect
to Shares for which no Dealer of record exists or  qualification  standards have
not been met as partial  consideration  for  personal  services  and/or  account
maintenance  services provided by the Distributor to the Shares. The service fee
payable  pursuant to this  paragraph 4 may from time to time be paid by the Fund
to the Distributor and the Distributor will then pay these fees on behalf of the
Fund.

5. The Fund understands that agreements  between the Distributor and the Dealers
may provide for payment of commissions  to Dealers in connection  with the sales
of Shares and may provide for a portion (which may be all or substantially  all)
of the  fees  payable  by the Fund to the  Distributor  under  the  Distribution
Agreement to be paid by the  Distributor  to the Dealers in  consideration  of a
Dealer's services as a dealer of the Shares. Except as described in paragraph 4,
nothing  in this  Plan  shall be  construed  as  requiring  the Fund to make any
payment to any  Dealer or to have any  obligations  to any Dealer in  connection
with  services  as a dealer  of the  Shares.  The  Distributor  shall  agree and
undertake that any agreement entered into between the Distributor and any Dealer
shall  provide  that,  except as provided in paragraph 4, such Dealer shall look
solely to the Distributor for compensation for its services  thereunder and that
in no event shall such Dealer seek any payment from the Fund.

6. The Fund shall pay all fees and expenses of any  independent  auditor,  legal
counsel,   investment  adviser,   administrator,   transfer  agent,   custodian,
shareholder servicing agent, registrar or dividend disbursing agent of the Fund;
expenses  of  distributing  and  redeeming  Shares  and  servicing   shareholder
accounts; expenses of preparing, printing and mailing prospectuses,  shareholder
reports,  notices,  proxy  statements and reports to  governmental  officers and
commissions and to shareholders of the Fund,  except that the Distributor  shall
be responsible for the distribution-related expenses as provided in paragraphs 1
and 2 hereof.

7.  Nothing  herein  contained  shall be deemed to require the Trust to take any
action  contrary  to its  Declaration  of Trust  or  By-Laws  or any  applicable
statutory  or  regulatory  requirement  to
<PAGE>
which it is subject or by which it is bound,  or to relieve or deprive the Board
of Trustees of the  responsibility for and control of the conduct of the affairs
of the Fund.

8. This Plan shall  become  effective  upon (a) approval by a vote of at least a
"majority of the outstanding  voting securities" of the Shares, and (b) approval
by a vote of the Board of Trustees  and a vote of a majority of the Trustees who
are not  "interested  persons"  of the Trust and who have no direct or  indirect
financial  interest in the operation of the Plan or in any agreement  related to
the Plan  (the  "Qualified  Trustees"),  such  votes to be cast in  person  at a
meeting called for the purpose of voting on this Plan.

9. This Plan shall continue in effect indefinitely; provided, however, that such
continuance  is  "specifically  approved at least  annually" by a vote of both a
majority of the Trustees of the Trust and a majority of the Qualified  Trustees.
If such annual approval is not obtained,  this Plan shall expire 12 months after
the effective date of the last approval.

10.  This Plan may be  amended at any time by the Board of  Trustees;  provided,
however,  that this Plan may not be amended to increase materially the amount of
permitted  expenses  hereunder without the approval of holders of a "majority of
the  outstanding  voting  securities"  of the Shares  and may not be  materially
amended in any case  without a vote of a majority of both the  Trustees  and the
Qualified  Trustees.  This  Plan  may be  terminated  at any time by a vote of a
majority of the Qualified Trustees or by a vote of the holders of a "majority of
the outstanding voting securities" of the Shares.

11. The Fund and the  Distributor  shall provide the Board of Trustees,  and the
Board of Trustees  shall review,  at least  quarterly,  a written  report of the
amounts  expended  under this Plan and the purposes for which such  expenditures
were made.

12. While this Plan is in effect,  the  selection  and  nomination  of Qualified
Trustees  shall be  committed  to the  discretion  of the  Trustees  who are not
"interested persons" of the Trust.

13. For the purposes of this Plan, the terms "interested persons",  "majority of
the outstanding voting securities" and "specifically approved at least annually"
are used as defined in the 1940 Act. In addition,  for  purposes of  determining
the fees  payable  to the  Distributor  hereunder,  the value of the  Fund's net
assets  shall be computed  in the manner  specified  in the Fund's  then-current
prospectus and statement of additional  information  for  computation of the net
asset value of the Shares of the Fund.
<PAGE>

14. The Trust shall preserve  copies of this Plan,  and each  agreement  related
hereto and each report  referred to in  paragraph 11 hereof  (collectively,  the
"Records")  for a period of six years from the end of the  fiscal  year in which
such Record was made and each such record shall be kept in an easily  accessible
place for the first two years of said record-keeping.

15. This Plan shall be construed in accordance with the laws of The Commonwealth
of Massachusetts and the applicable provisions of the 1940 Act.

16. If any  provision  of this  Plan  shall be held or made  invalid  by a court
decision,  statute,  rule or  otherwise,  the remainder of the Plan shall not be
affected thereby.

<PAGE>
                                                          EXHIBIT NO. 99.15(h)


                               MFS SERIES TRUST X
              MFS/FOREIGN & COLONIAL EMERGING MARKETS EQUITY FUND
                              PLAN OF DISTRIBUTION

PLAN OF  DISTRIBUTION  with respect to the shares of  beneficial  interest to be
designated  "Class B" of the MFS/Foreign & Colonial Emerging Markets Equity Fund
(the  "Fund"),  a series of MFS Series Trust X (the  "Trust"),  a  Massachusetts
business trust, dated the 1st day of September, 1995.

                                  WITNESSETH:

WHEREAS,  the Trust is engaged in business as an open-end management  investment
company and is registered  under the Investment  Company Act of 1940, as amended
(collectively with the rules and regulations promulgated  thereunder,  the "1940
Act"); and

WHEREAS,  the Trust  intends to  distribute  the shares of  beneficial  interest
(without  par value) of the Fund  designated  Class B Shares (the  "Shares")  in
accordance  with Rule 12b-1  under the 1940 Act ("Rule  12b-1"),  and desires to
adopt this Distribution Plan (the "Plan") as a plan of distribution  pursuant to
such Rule; and

WHEREAS,  the  Trust  desires  for  MFS  Fund  Distributors,  Inc.,  a  Delaware
corporation,  to  provide  certain  distribution  services  for  the  Fund  (the
"Distributor"); and

WHEREAS, the Trust has entered into a distribution  agreement (the "Distribution
Agreement")  (in a form  approved  by the  Board of  Trustees  of the Trust in a
manner  specified  in  such  Rule  12b-1)  with  the  Distributor,  whereby  the
Distributor  will provide  facilities  and personnel and render  services to the
Fund in connection with the offering and distribution of the Shares; and

WHEREAS, the Trust recognizes and agrees that (a) the Distributor may retain the
services of firms or individuals to act as dealers (the "Dealers") of the Shares
in  connection  with the offering of Shares,  and (b) the  Distributor  may make
payments for such services to the Dealers out of the fee paid to the Distributor
hereunder,  any deferred sales charges  imposed by the Distributor in connection
with the repurchase of Shares,  its profits or any other source available to it;
and
<PAGE>

WHEREAS, the Trust recognizes and agrees that the Distributor may impose certain
deferred sales charges in connection  with the repurchase of Shares by the Fund,
and the  Distributor  may retain (or receive from the Fund,  as the case may be)
all such deferred sales charges; and

WHEREAS,  the Board of Trustees of the Trust,  in  considering  whether the Fund
should adopt and implement  this Plan,  has  evaluated  such  information  as it
deemed necessary to an informed  determination as to whether this Plan should be
adopted and implemented  and has considered such pertinent  factors as it deemed
necessary  to form the basis for a  decision  to use assets of the Fund for such
purposes,  and has  determined  that there is a reasonable  likelihood  that the
adoption and  implementation  of this Plan will benefit the Fund and its Class B
shareholders;

NOW,  THEREFORE,  the Board of Trustees of the Trust hereby adopts this Plan for
the Fund as a plan for  distribution  relating to the Shares in accordance  with
Rule 12b-1, on the following terms and conditions:

1. As specified in the  Distribution  Agreement,  the Distributor  shall provide
facilities,  personnel  and a program  with  respect to the offering and sale of
Shares. Among other things, the Distributor shall be responsible for commissions
payable to  Dealers,  all  expenses  of  printing  (excluding  typesetting)  and
distributing  prospectuses to prospective  shareholders and providing such other
related services as are reasonably necessary in connection therewith.

2. The Distributor  shall bear all  distribution-related  expenses to the extent
specified in the Distribution  Agreement in providing the services  described in
paragraph  1,  including  without  limitation,  the  compensation  of  personnel
necessary to provide  such  services  and all costs of travel,  office  expenses
(including rent and overhead), equipment, printing, delivery and mailing costs.

3. It is understood  that the  Distributor  may impose  certain  deferred  sales
charges  in  connection  with  the  repurchase  of  Shares  by the  Fund and the
Distributor  may retain (or receive from the Fund,  as the case may be) all such
deferred sales charges.  As additional  consideration for all services performed
and  expenses   incurred  in  the  performance  of  its  obligations  under  the
Distribution  Agreement,  the Fund shall pay the Distributor a distribution  fee
periodically at a rate of 0.75% per annum of the Fund's average daily net assets
attributable to the shares.

4. As partial consideration for the personal services and/or account maintenance
services  performed by each Dealer in the performance of its  obligations  under
its dealer  agreement  with
<PAGE>
the Distributor,  the Fund shall pay each Dealer a service fee periodically at a
rate not to exceed  0.25%  per annum of the  portion  of the  average  daily net
assets of the Fund that is represented by Shares that are owned by investors for
whom such Dealer is the holder or dealer of record.  That  portion of the Fund's
average daily net assets on which the fees payable under this paragraph 4 hereof
are calculated may be subject to certain  minimum amount  requirements as may be
determined,  and additional or different dealer qualification standards that may
be established from time to time, by the Distributor.  The Distributor  shall be
entitled to be paid any fees payable under this  paragraph 4 hereof with respect
to Shares for which no Dealer of record exists or  qualification  standards have
not been met as partial  consideration  for  personal  services  and/or  account
maintenance  services provided by the Distributor to the Shares. The service fee
payable  pursuant to this  paragraph 4 may from time to time be paid by the Fund
to the Distributor and the Distributor will then pay these fees on behalf of the
Fund.

5. The Fund understands that agreements  between the Distributor and the Dealers
may provide for payment of commissions  to Dealers in connection  with the sales
of Shares and may provide for a portion (which may be all or substantially  all)
of the  fees  payable  by the Fund to the  Distributor  under  the  Distribution
Agreement to be paid by the  Distributor  to the Dealers in  consideration  of a
Dealer's services as a dealer of the Shares. Except as described in paragraph 4,
nothing  in this  Plan  shall be  construed  as  requiring  the Fund to make any
payment to any  Dealer or to have any  obligations  to any Dealer in  connection
with  services  as a dealer  of the  Shares.  The  Distributor  shall  agree and
undertake that any agreement entered into between the Distributor and any Dealer
shall  provide  that,  except as provided in paragraph 4, such Dealer shall look
solely to the Distributor for compensation for its services  thereunder and that
in no event shall such Dealer seek any payment from the Fund.

6. The Fund shall pay all fees and expenses of any  independent  auditor,  legal
counsel,   investment  adviser,   administrator,   transfer  agent,   custodian,
shareholder servicing agent, registrar or dividend disbursing agent of the Fund;
expenses  of  distributing  and  redeeming  Shares  and  servicing   shareholder
accounts; expenses of preparing, printing and mailing prospectuses,  shareholder
reports,  notices,  proxy  statements and reports to  governmental  officers and
commissions and to shareholders of the Fund,  except that the Distributor  shall
be responsible for the distribution-related expenses as provided in paragraphs 1
and 2 hereof.

7.  Nothing  herein  contained  shall be deemed to require the Trust to take any
action  contrary  to its  Declaration  of Trust  or  By-Laws  or any  applicable
statutory  or  regulatory  requirement  to
<PAGE>
which it is subject or by which it is bound,  or to relieve or deprive the Board
of Trustees of the  responsibility for and control of the conduct of the affairs
of the Fund.

8. This Plan shall  become  effective  upon (a) approval by a vote of at least a
"majority of the outstanding  voting securities" of the Shares, and (b) approval
by a vote of the Board of Trustees  and a vote of a majority of the Trustees who
are not  "interested  persons"  of the Trust and who have no direct or  indirect
financial  interest in the operation of the Plan or in any agreement  related to
the Plan  (the  "Qualified  Trustees"),  such  votes to be cast in  person  at a
meeting called for the purpose of voting on this Plan.

9. This Plan shall continue in effect indefinitely; provided, however, that such
continuance  is  "specifically  approved at least  annually" by a vote of both a
majority of the Trustees of the Trust and a majority of the Qualified  Trustees.
If such annual approval is not obtained,  this Plan shall expire 12 months after
the effective date of the last approval.

10.  This Plan may be  amended at any time by the Board of  Trustees;  provided,
however,  that this Plan may not be amended to increase materially the amount of
permitted  expenses  hereunder without the approval of holders of a "majority of
the  outstanding  voting  securities"  of the Shares  and may not be  materially
amended in any case  without a vote of a majority of both the  Trustees  and the
Qualified  Trustees.  This  Plan  may be  terminated  at any time by a vote of a
majority of the Qualified Trustees or by a vote of the holders of a "majority of
the outstanding voting securities" of the Shares.

11. The Fund and the  Distributor  shall provide the Board of Trustees,  and the
Board of Trustees  shall review,  at least  quarterly,  a written  report of the
amounts  expended  under this Plan and the purposes for which such  expenditures
were made.

12. While this Plan is in effect,  the  selection  and  nomination  of Qualified
Trustees  shall be  committed  to the  discretion  of the  Trustees  who are not
"interested persons" of the Trust.

13. For the purposes of this Plan, the terms "interested persons",  "majority of
the outstanding voting securities" and "specifically approved at least annually"
are used as defined in the 1940 Act. In addition,  for  purposes of  determining
the fees  payable  to the  Distributor  hereunder,  the value of the  Fund's net
assets  shall be computed  in the manner  specified  in the Fund's  then-current
prospectus and statement of additional  information  for  computation of the net
asset value of the Shares of the Fund.
<PAGE>

14. The Trust shall preserve  copies of this Plan,  and each  agreement  related
hereto and each report  referred to in  paragraph 11 hereof  (collectively,  the
"Records")  for a period of six years from the end of the  fiscal  year in which
such Record was made and each such record shall be kept in an easily  accessible
place for the first two years of said record-keeping.

15. This Plan shall be construed in accordance with the laws of The Commonwealth
of Massachusetts and the applicable provisions of the 1940 Act.

16. If any  provision  of this  Plan  shall be held or made  invalid  by a court
decision,  statute,  rule or  otherwise,  the remainder of the Plan shall not be
affected thereby.

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE FINANCIAL STATEMENTS OF MFS GOVERNMENT
MORTGAGE FUND CLASS A AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
   <NUMBER>001
   <NAME> MFS GOVERNMENT MORTGAGE FUND CLASS A
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                   JUL-31-1995
<PERIOD-END>                        JUL-31-1995
<INVESTMENTS-AT-COST>               1,353,250,045   
<INVESTMENTS-AT-VALUE>              1,355,622,211   
<RECEIVABLES>                          13,642,208   
<ASSETS-OTHER>                             19,877   
<OTHER-ITEMS-ASSETS>                      157,067   
<TOTAL-ASSETS>                      1,369,441,363   
<PAYABLE-FOR-SECURITIES>               20,134,375   
<SENIOR-LONG-TERM-DEBT>                         0   
<OTHER-ITEMS-LIABILITIES>               3,254,191   
<TOTAL-LIABILITIES>                    23,388,566   
<SENIOR-EQUITY>                                 0   
<PAID-IN-CAPITAL-COMMON>            1,471,569,421   
<SHARES-COMMON-STOCK>                  80,276,379   
<SHARES-COMMON-PRIOR>                  65,284,398   
<ACCUMULATED-NII-CURRENT>                       0   
<OVERDISTRIBUTION-NII>                    121,221   
<ACCUMULATED-NET-GAINS>                         0   
<OVERDISTRIBUTION-GAINS>              127,510,438   
<ACCUM-APPREC-OR-DEPREC>                2,115,035   
<NET-ASSETS>                       (1,346,052,797)  
<DIVIDEND-INCOME>                               0   
<INTEREST-INCOME>                     120,116,845   
<OTHER-INCOME>                                  0   
<EXPENSES-NET>                         25,579,049   
<NET-INVESTMENT-INCOME>               (94,537,796)  
<REALIZED-GAINS-CURRENT>              (44,236,628)  
<APPREC-INCREASE-CURRENT>              68,708,743   
<NET-CHANGE-FROM-OPS>                 119,009,911   
<EQUALIZATION>                                  0   
<DISTRIBUTIONS-OF-INCOME>             (26,574,630)  
<DISTRIBUTIONS-OF-GAINS>                        0   
<DISTRIBUTIONS-OTHER>                  (2,036,802)  
<NUMBER-OF-SHARES-SOLD>                27,491,721   
<NUMBER-OF-SHARES-REDEEMED>            14,375,598   
<SHARES-REINVESTED>                     1,875,858   
<NET-CHANGE-IN-ASSETS>               (306,930,559)  
<ACCUMULATED-NII-PRIOR>                         0   
<ACCUMULATED-GAINS-PRIOR>                       0   
<OVERDISTRIB-NII-PRIOR>                    50,624   
<OVERDIST-NET-GAINS-PRIOR>             88,989,835   
<GROSS-ADVISORY-FEES>                   9,450,684   
<INTEREST-EXPENSE>                              0   
<GROSS-EXPENSE>                        25,579,049   
<AVERAGE-NET-ASSETS>                1,454,041,604   
<PER-SHARE-NAV-BEGIN>                        6.49   
<PER-SHARE-NII>                              0.45   
<PER-SHARE-GAIN-APPREC>                      0.14   
<PER-SHARE-DIVIDEND>                        (0.42)  
<PER-SHARE-DISTRIBUTIONS>                    0.00   
<RETURNS-OF-CAPITAL>                        (0.01)  
<PER-SHARE-NAV-END>                          6.65   
<EXPENSE-RATIO>                              1.25   
<AVG-DEBT-OUTSTANDING>                          0   
<AVG-DEBT-PER-SHARE>                            0   
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION
EXTRACTED FROM THE FINANCIAL STATEMENTS OF MFS GOVERNMENT
MORTGAGE FUND CLASS B AND IS QUALIFIED IN ITS ENTIRETY BY
REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<SERIES>
   <NUMBER>002
   <NAME> MFS GOVERNMENT MORTGAGE FUND CLASS B
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                   JUL-31-1995
<PERIOD-END>                        JUL-31-1995
<INVESTMENTS-AT-COST>               1,353,250,045
<INVESTMENTS-AT-VALUE>              1,355,622,211
<RECEIVABLES>                          13,642,208
<ASSETS-OTHER>                             19,877
<OTHER-ITEMS-ASSETS>                      157,067
<TOTAL-ASSETS>                      1,369,441,363
<PAYABLE-FOR-SECURITIES>               20,134,375
<SENIOR-LONG-TERM-DEBT>                         0
<OTHER-ITEMS-LIABILITIES>               3,254,191
<TOTAL-LIABILITIES>                    23,388,566
<SENIOR-EQUITY>                                 0
<PAID-IN-CAPITAL-COMMON>            1,471,569,421
<SHARES-COMMON-STOCK>                 122,148,159
<SHARES-COMMON-PRIOR>                 189,497,087
<ACCUMULATED-NII-CURRENT>                       0
<OVERDISTRIBUTION-NII>                    121,221
<ACCUMULATED-NET-GAINS>                         0
<OVERDISTRIBUTION-GAINS>              127,510,438
<ACCUM-APPREC-OR-DEPREC>                2,115,035
<NET-ASSETS>                       (1,346,052,797)
<DIVIDEND-INCOME>                               0
<INTEREST-INCOME>                     120,116,845
<OTHER-INCOME>                                  0
<EXPENSES-NET>                         25,579,049
<NET-INVESTMENT-INCOME>               (94,537,796)
<REALIZED-GAINS-CURRENT>              (44,236,628)
<APPREC-INCREASE-CURRENT>              68,708,743
<NET-CHANGE-FROM-OPS>                 119,009,911
<EQUALIZATION>                                  0
<DISTRIBUTIONS-OF-INCOME>             (62,269,346)
<DISTRIBUTIONS-OF-GAINS>                        0
<DISTRIBUTIONS-OTHER>                           0
<NUMBER-OF-SHARES-SOLD>                 4,039,025
<NUMBER-OF-SHARES-REDEEMED>            75,797,892
<SHARES-REINVESTED>                     4,409,939
<NET-CHANGE-IN-ASSETS>               (306,930,559)
<ACCUMULATED-NII-PRIOR>                         0
<ACCUMULATED-GAINS-PRIOR>                       0
<OVERDISTRIB-NII-PRIOR>                    50,624
<OVERDIST-NET-GAINS-PRIOR>             88,989,835
<GROSS-ADVISORY-FEES>                   9,450,684
<INTEREST-EXPENSE>                              0
<GROSS-EXPENSE>                        25,579,049
<AVERAGE-NET-ASSETS>                1,454,041,604
<PER-SHARE-NAV-BEGIN>                        6.49
<PER-SHARE-NII>                              0.41
<PER-SHARE-GAIN-APPREC>                      0.14
<PER-SHARE-DIVIDEND>                        (0.38)
<PER-SHARE-DISTRIBUTIONS>                    0.00
<RETURNS-OF-CAPITAL>                        (0.01)
<PER-SHARE-NAV-END>                          6.65
<EXPENSE-RATIO>                              1.96
<AVG-DEBT-OUTSTANDING>                          0
<AVG-DEBT-PER-SHARE>                            0
        


</TABLE>


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