MFS® BLENDED RESEARCH CORE EQUITY PORTFOLIO	MFS® INTERNATIONAL GROWTH PORTFOLIO
MFS® BLENDED RESEARCH GROWTH PORTFOLIO	MFS® INTERNATIONAL VALUE PORTFOLIO
MFS® BLENDED RESEARCH VALUE PORTFOLIO	MFS® MASSACHUSETTS INVESTORS GROWTH STOCK PORTFOLIO
MFS® BOND PORTFOLIO	MFS® MID CAP GROWTH PORTFOLIO
MFS® CORE EQUITY PORTFOLIO	MFS® MONEY MARKET PORTFOLIO
MFS® EMERGING MARKETS EQUITY PORTFOLIO	MFS® NEW DISCOVERY PORTFOLIO
MFS® GLOBAL GOVERNMENTS PORTFOLIO	MFS® RESEARCH INTERNATIONAL PORTFOLIO
MFS® GLOBAL GROWTH PORTFOLIO	MFS® STRATEGIC INCOME PORTFOLIO
MFS® GLOBAL RESEARCH PORTFOLIO	MFS® TECHNOLOGY PORTFOLIO
MFS® GLOBAL TACTICAL ALLOCATION PORTFOLIO	MFS® TOTAL RETURN PORTFOLIO
MFS® GOVERNMENT SECURITIES PORTFOLIO	MFS® UTILITIES PORTFOLIO
MFS® GROWTH PORTFOLIO	MFS® VALUE PORTFOLIO
MFS® HIGH YIELD PORTFOLIO

This SAI supplement supersedes and replaces the Trust’s SAI supplements dated May 28, 2010, July 29, 2010, and September 28, 2010.

Effective November 28, 2010, the section entitled “Portfolio Transactions and Brokerage Commissions” is restated in its entirety as follows:

 PORTFOLIO TRANSACTIONS AND BROKERAGE COMMISSIONS

Specific decisions to purchase or sell securities for the Funds are made by persons affiliated with the Adviser. Any such person may serve other clients of the Adviser or any subsidiary of the Adviser in a similar capacity.

The Adviser places all Fund orders for the purchase or sale of securities with the primary objective of seeking to obtain the best price and execution from responsible broker/dealers at competitive rates. The Adviser seeks to deal with broker/dealers that can meet a high standard of quality regarding execution services. The Adviser may also place value on a broker/dealer’s ability to provide useful research assistance. The Adviser takes into account all factors it deems relevant, including by way of illustration: price; the size of the transaction; the nature of the market of the security; the amount of the commission; the timing and impact of the transaction taking into account market prices and trends; the reputation, experience and financial stability of the broker/dealer involved; the willingness of the broker/dealer to commit capital; the need for anonymity in the market; and the quality of services rendered by the broker/dealer in other transactions, including the quality of the broker/dealer’s research.

In certain circumstances, such as a buy in for failure to deliver, the Adviser is not able to select the broker/dealer who will transact to cover the failure.  For example, if the Fund sells a security short and is unable to deliver the securities sold short the broker/dealer through whom the Fund sold short must deliver securities purchased for cash, i.e., effect a "buy in," unless it knows that the Fund either is in the process of forwarding the securities to the broker/dealer or will do so as soon as possible without undue inconvenience or expense.  Similarly, there can also be a failure to deliver in a long transaction and a resulting buy in by the broker/dealer through whom the securities were sold.  If the broker/dealer effects a buy-in, the Adviser will be unable to control the trading techniques, methods, venues or any other aspect of the trade used by the broker/dealer.

Commission rates vary depending upon trading techniques, methods, venues and broker/dealers selected as well as the market(s) in which the security is traded and its relative liquidity.  As noted above, the Adviser may utilize numerous broker/dealers and trading venues and strategies in order to seek the best execution for client transactions.  The Adviser periodically and systematically reviews the performance of the broker/dealers that execute Fund transactions, including the commission rates paid to broker/dealers by considering the value and quality of brokerage and research services provided.  The quality of a broker/dealer’s services is measured by analyzing various factors that could effect the execution of trades.  These factors include the ability to execute trades with a minimum of market impact, the speed and efficiency of executions, electronic trading capabilities, adequacy of capital, research provided to the adviser, and accommodation of the adviser’s special needs.  The Adviser may employ outside vendors to provide reports on the quality of broker/dealer executions.

In the case of securities traded in the over-the-counter market, portfolio transactions may be effected either on an agency basis, which involves the payment of negotiated brokerage commissions to the broker/dealer, including electronic communication networks, or on a principal basis at net prices without commissions, but which include compensation to the broker/dealer in the form of a mark-up or mark-down, depending on where the Adviser believes best execution is available. In the case of securities purchased from underwriters, the cost of such securities generally includes a fixed underwriting commission or concession. From time to time, soliciting dealer fees are available to the Adviser on tender or exchange offers. Such soliciting or dealer fees are, in effect, recaptured by the Funds.

In allocating brokerage, the Adviser may take into consideration the receipt of research and brokerage services, consistent with its obligation to seek best price and execution for Fund transactions. As permitted by Section 28(e) of the Securities Exchange Act of 1934, as amended (‘‘Section 28(e)’’), the Adviser may cause the Funds to pay a broker/dealer which provides “brokerage and research services” (as defined by the Securities Exchange Act of 1934, as amended) to the Adviser an amount of commission for effecting a securities transaction for the Funds in excess of the amount other broker/dealers would have charged for the transaction if the Adviser determines in good faith that the greater commission is reasonable in relation to the value of the brokerage and research services provided by the effecting broker/dealer viewed in terms of either a particular transaction or the Adviser’s overall responsibilities to the Funds and its other clients. ‘‘Commissions,’’ as interpreted by the SEC, include fees paid to brokers for trades conducted on an agency basis, and certain mark-ups, markdowns, commission equivalents and other fees received by dealers in riskless principal transactions placed in the NASDAQ market.

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The term ‘‘brokerage and research services’’ includes advice as to the value of securities, the advisability of investing in, purchasing or selling securities, and the availability of securities or purchasers or sellers of securities; furnishing analyses and reports concerning issuers, industries, securities, economic factors and trends, portfolio strategy, and the performance of accounts; and effecting securities transactions and performing functions incidental thereto (such as clearance and settlement) or required in connection therewith by applicable rules. Such services (‘‘Research’’) includes statistical, research, and other factual information or services such as: investment research reports; access to analysts; execution systems and trading analytics; reports or databases containing corporate, fundamental, and technical analyses; portfolio modeling strategies; and economic research services, such as publications, chart services, and advice from economists concerning macroeconomics information, and analytical investment information about particular corporations. Such brokerage and research services are provided to the Adviser for no consideration other than brokerage or underwriting commissions. In determining whether a service or product qualifies as “brokerage and research services,” the Adviser evaluates whether the service or product provides lawful and appropriate assistance to the Adviser in carrying out its investment decision-making responsibilities. It is often not possible to place a dollar value on the brokerage and research services the Adviser receives from brokers. The determination and evaluation of the reasonableness of the brokerage commissions paid in connection with portfolio transactions is based primarily on the professional opinions of the persons responsible for the placement and review of such transactions.

MFS has entered into Client Commission Agreements with broker/dealers that are involved from time to time in executing, clearing or settling securities transactions on behalf of Funds (“Executing Brokers”) which provide for the Executing Brokers to pay a portion of the Commissions paid by the Funds for securities transactions (“Pooled Commissions”) to providers of Research (“Research Providers”). Such Research Providers produce Research for the benefit of MFS.

Because a Research Provider may play no role in executing client securities transactions, any Research prepared by that Research Provider may constitute third party research. MFS may use brokerage commissions, including Pooled Commissions, from the Funds’ portfolio transactions to acquire Research, subject to the procedures and limitations described in this discussion.

From time to time, MFS prepares a list of Research Providers that have been deemed by MFS to provide valuable Research (‘‘Research Firms’’) as determined periodically by MFS’ investment staff (“Research Votes”). Executing Brokers are eligible to be included in the list of Research Firms. All trades with Research Firms will be effected in accordance with MFS’ obligation to seek best execution for its client accounts. MFS uses a Research Vote as a guide for allocating Pooled Commissions. Compensation for Research may also be made pursuant to commissions paid on trades (“Trade Commissions”) executed by a Research Provider who is registered as a broker/dealer (“Broker Provider”).  Under normal circumstances, Executing Brokers are compensated for Research solely through Trade Commissions.  To the extent that payments for Research to a Broker Provider other than an Executing Broker are made pursuant to Trade Commissions, MFS will reduce the amount of Pooled Commissions to be paid to that Broker Provider for its Research. However, MFS will reduce the amount of Pooled Commissions to be paid to that Broker Provider by less than the full amount of Trade Commissions paid to that Broker Provider. The research vote is also used as a guide for allocating cash payments, if any, made by MFS from its own resources and Pooled Commissions to Research Firms that are not Broker Providers.  Neither MFS nor the Funds have an obligation to any Research Firm if the amount of Trade Commissions and Pooled Commissions paid to the Research Firm is less than the applicable non-binding target.  MFS reserves the right to pay cash to the Research Firm from its own resources in an amount MFS determines in its discretion.

If the Adviser determines that any service or product has a mixed use (i.e., it also serves functions that do not assist the investment decision-making or trading process), the Adviser may allocate the costs of such service or product accordingly in its reasonable discretion. MFS will allocate Trade Commissions and Pooled Commissions to Research Firms only for the portion of the service or product that MFS determines assists it in the investment decision-making or trading process and will pay for the remaining value of the product or service in cash.

In effecting portfolio transactions on behalf of the Funds and the Adviser’s other clients, the Adviser from time to time may instruct the broker/dealer that executes a transaction to allocate, or ‘‘step out,’’ a portion of such transaction to another broker/dealer. The broker/dealer to which the Adviser has ‘‘stepped out’’ would then settle and complete the designated portion of the transaction, and the executing broker/dealer would settle and complete the remaining portion of the transaction that has not been ‘‘stepped out.’’ Each broker/dealer may receive a commission or brokerage fee with respect to that portion of the transaction that it settles and completes.

The advisory fee paid by each of the Funds to the Adviser is not reduced as a consequence of the Adviser’s receipt of Research. To the extent the Funds’ portfolio transactions are used to obtain Research, the brokerage commissions paid by the Funds might exceed those that might otherwise be paid for execution only. The Research received may be useful and of value to the Adviser or its affiliates in serving both the Funds and other clients of the Adviser or its affiliates; accordingly, not all of the Research provided by broker/dealers through which the Funds effect securities transactions may be used by the Adviser in connection with the Funds. The Adviser, through the use of the Research, avoids the additional expenses that it would incur if it attempted to develop comparable information through its own staff or if it purchased such Research with its own resources.

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In certain instances there are securities that are suitable for the Funds’ portfolios as well as for one or more of the other clients of the Adviser or of any subsidiary of the Adviser (or that the Adviser believes should no longer be held by the Funds’ portfolios or by other clients of the Adviser or any subsidiary of the Adviser). It is possible 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. Transactions for each client are generally effected independently unless the Adviser determines to purchase or sell the same securities for several clients at approximately the same time. The Adviser may, but is not required to, aggregate together purchases and sales for several clients and will allocate the trades in a fair and equitable manner, across participating clients. The Adviser has adopted policies that are reasonably designed to ensure that 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 fair and equitable to each. For example, with respect to MFS, among other things, these policies prohibit allocations of equity initial public offerings, equity limited offerings or fixed income new issues to, among others: (1) Private Portfolio Management accounts; (2) accounts principally owned by:  (a) officers, directors, and employees of the Adviser or its subsidiaries; (b) trustees of any MFS fund (either directly or through retirement plan vehicles) which accounts are not being offered to the public; (c) the Adviser or its subsidiaries; or (d) any combination thereof; (3) any account which is neither publicly registered nor offered to the public which the Adviser has determined pursuant to its internal guidelines to be an "alternative" account with respect to which twenty-five percent (25%) or more of the account’s assets are attributable to the Adviser and or its subsidiaries, its directors, officers, or employees; and (4) any accounts owned beneficially solely by MFS or any direct or indirect subsidiary of MFS except accounts in which MFS or any of its direct or indirect subsidiaries is the sole beneficial owner, which generally will be allocated investment opportunities (other than with respect to equity initial public offerings, equity limited offerings or fixed income new issues) on the same basis as Funds or other clients of MFS when the account has been established and seeded by MFS or the subsidiary with a limited amount of assets either for the purpose of establishing a performance record to enable MFS or the subsidiary to offer the account’s investment style to unaffiliated third parties or if the account is being offered to the general public. However, these policies do not prohibit allocations to funds or other accounts owned beneficially by Sun Life of Canada (U.S.) Financial Services Holdings, Inc., or Sun Life Financial Inc., or their affiliates other than MFS and its direct and indirect subsidiaries.

It is recognized that in some cases this system could have a detrimental effect on the price or availability of a security as far as the Funds are concerned.

Brokerage commissions paid by each Fund for certain specified periods, information concerning purchases by each Fund of securities issued by its regular broker/dealers for its most recent fiscal year, and information concerning the amount of transactions and related commissions to broker/dealer firms that MFS has determined provide valuable research for each Fund’s most recent fiscal year, are set forth in Appendix K.

The MFS Global Research Portfolio's portfolio turnover rate decreased from 144% for the fiscal year ended 2008 to 63% for the fiscal year ended 2009. The decrease in the Fund's portfolio turnover rate over the preceding fiscal year was due, in large part, to the change in the fund's investment strategy from investing primarily in U.S. equity securities to investing primarily in U.S. and foreign equity securities.

Effective September 28, 2010, the sub-section entitled “Public Disclosure of Portfolio Holdings” beneath the main heading “Disclosure of Portfolio Holdings" is restated in its entirety as follows:

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Public Disclosure of Portfolio Holdings

In addition to the public disclosure of Fund portfolio holdings through required SEC quarterly filings, a Fund may make its portfolio holdings publicly available on the MFS Web site in such scope and form and with such frequency as MFS reasonably determines.

For each Fund, the following information is generally available to you on the MFS Web site (mfs.com):

Information	Approximate Date of Posting to Web Site
Fund’s top 10 holdings as of each month’s end	14 days after month end
Fund’s full holdings as of each month’s end	24 days after month end

Holdings also include short positions. Portfolio holdings are determined based on the equivalent exposure of holdings. The equivalent exposure of a holding is a calculated amount that approximates the market value of an underlying asset that is expected to have the same impact on performance as the holding. The equivalent exposure of a derivative may be different than the market value of the derivative. For most other holdings, the equivalent exposure is the same as the market value of the holding. If a fund has substantial investments in both equity and debt instruments, the fund’s top 10 equity holdings and top 10 debt holdings will be made available.

In addition, for MFS Money Market Portfolio, the following information is generally available to you on the MFS Web site (mfs.com):

Information	Approximate Date of Posting to Web Site
Fund’s full holdings as of each month’s end	5 business days after month end

If approved by an Authorized Person, a Fund may from time to time make available on the MFS Web site and/or in a press release, information about the holdings of a Fund or Funds in a particular investment or investments as of a current date, including the equivalent exposure of such holding or holdings.

Note that the Fund or MFS may suspend the posting of this information or modify the elements of this Web posting policy without notice to shareholders. Once posted, the above information will generally remain available on the Web site until at least the date on which the Fund files a Form N-CSR or Form N-Q for the period that includes the date as of which the Web site information is current.

Certain registered investment companies that are advised by MFS and registered investment companies that are sub-advised by MFS or its affiliates are subject to different portfolio holdings disclosure policies that may permit public disclosure of portfolio holdings information in different forms and at different times. In addition, separate account and unregistered product clients of MFS or its affiliates have same day access to their portfolio holdings, and prospective clients and their advisers have access to representative portfolio holdings. Some of these registered investment companies, sub-advised Funds, separate accounts, and unregistered products, all advised or sub-advised by MFS or its affiliates, have substantially similar, or in some cases, nearly identical, portfolio holdings to certain Funds (Similarly Managed Investment Products). A Similarly Managed Investment Product is not subject to the portfolio holdings disclosure policies of the Fund to which it is similar and may disclose its similar or nearly identical portfolio holdings information in different forms and at different times than such Fund.

A Fund’s portfolio holdings are considered to be publicly disclosed: (a) upon the disclosure of the portfolio holdings in a publicly available, routine filing with the SEC that is required to include the information; (b) the day after the Fund makes such information available on its Web site (assuming that it discloses in its prospectus that such information is available on its Web site); or (c) at such additional times and on such additional basis as determined by the SEC or its staff.

Effective May 28, 2010, the sub-section entitled “Money Market Fund(s)” under the main heading “Determination of Net Asset Value” is restated in its entirety as follows:

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Money Market Fund(s)

Pursuant to procedures approved by the Board of Trustees, money market instruments are generally valued at amortized cost, which approximates market value. Amortized cost involves valuing an instrument at its cost as adjusted for amortization of premium or accretion of discount rather than its current market value. The amortized cost value of an instrument can be different from the market value of an instrument.

The Board of Trustees for each money market fund has established procedures designed to stabilize its net asset value per share at $1.00 and has delegated to the Adviser the responsibility for the implementation and administration of such procedures. Under the procedures, the adviser is responsible for monitoring and notifying the Board of Trustees of circumstances where the net asset value calculated by using market valuations may deviate from $1.00 per share and might result in a material dilution or other unfair result to investors or existing shareholders. Under such circumstances, the Board may take such corrective action, if any, as it deems appropriate to eliminate or reduce, to the extent reasonably practicable, any such dilution or unfair results. Such corrective action could include selling portfolio instruments prior to maturity to realize capital gains or losses; shortening average portfolio maturity; withholding dividends; suspending redemptions in connection with liquidating the money market fund; postponing payment of redemption proceeds; or processing transactions at a net asset value per share using available market quotations; and such other measures as the Trustees may deem appropriate.

Effective July 29, 2010, the fifth paragraph in the sub-section entitled “Non-Money Market Fund(s)” under the main heading “Determination of Net Asset Value” is restated in its entirety as follows:

Exchange-traded options are generally valued at the last sale or official closing price as provided by a third-party pricing service on the exchange on which such options are primarily traded. Exchange-traded options for which there were no sales reported that day are generally valued at the last daily bid quotation as provided by a third-party pricing service on the exchange on which such options are primarily traded. Options not traded on an exchange are generally valued at a broker/dealer bid quotation. Foreign currency options are generally valued at valuations provided by a third-party pricing service.

Effective November 28, 2010, the sub-section entitled “Country Location” in Appendix H entitled “Investment Strategies and Risks” is restated in its entirety as follows:

Country Location. The issuer of a security or other investment is generally deemed to be economically tied to a particular country if: (a) the security or other investment is issued or guaranteed by the government of that country or any of its agencies, authorities or instrumentalities; (b) the issuer is organized under the laws of, and maintains a principal office in, that country; (c) the issuer has its principal securities trading market in that country; (d) the issuer derives 50% or more of its total revenues from goods sold or services performed in that country; (e) the issuer has 50% or more of its assets in that country; (f) the issuer is included in an index which is representative of that country; or (g) the issuer is exposed to the economic fortunes and risks of that country.  For purposes of determining if a security or other investment is considered a foreign security, revenues from goods sold or services performed in all countries other than the United States and assets in all countries other than the United States may be aggregated.

Effective November 28, 2010, the sub-section entitled “Short Sales” in Appendix H entitled “Investment Strategies and Risks” is restated in its entirety as follows:

Short Sales. A seller may make short sales that are made “against the box” and also those that are not made “against the box.”  A short sale that is not made “against the box” is a transaction in which a party sells a security it does not own, in anticipation of a decline in the market value of that security. To complete such a transaction, the seller must borrow the security to make delivery to the buyer. The seller then is obligated to replace the security borrowed by purchasing it at the market price at the time of replacement. It may not be possible to liquidate or close out the short sale at any particular time or at an acceptable price. In addition, a fund may need to sell other investments to meet its short sale obligations at a time when it would not otherwise do so.  The price at such time may be more or less than the price at which the security was sold by the seller. To the extent that the seller invests the proceeds from the short sale in other securities, the seller is subject to the risks of the securities purchased with the proceeds in addition to the risks of the securities sold short. Until the security is replaced, the seller is required to repay the lender any dividends or interest which accrue during the period of the loan. To borrow the security, the seller also may be required to pay a premium, which would increase the cost of the security sold. The seller also will incur transaction costs in effecting short sales.

The seller will incur a loss as a result of the short sale if the price of the security or index increases between the date of the short sale and the date on which the seller replaces the borrowed security. Such loss may be unlimited.  The seller will realize a gain if the price of the security declines between those dates. The amount of any gain will be decreased, and the amount of any loss increased, by the amount of the premium, dividends or interest the seller may be required to pay in connection with a short sale. The overall benefit to the seller will depend on how the short sale performs relative to the market price of the securities purchased with the proceeds from the short sale.

A seller may also make short sales “against the box,” i.e., when a security identical to one owned by the seller is borrowed and sold short. If the seller enters into a short sale against the box, it is required to hold securities equivalent in-kind and amount to the securities sold short (or securities convertible or exchangeable into such securities) while the short sale is outstanding. The seller will incur transaction costs, including interest, in connection with opening, maintaining, and closing short sales against the box and will forgo an opportunity for capital appreciation in the security

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Effective May 28, 2010, the first paragraph under non-fundamental policy (1) in Appendix I entitled “Investment Restrictions” is replaced in its entirety by the following:

In addition, each Fund has adopted the following non-fundamental policies, which may be changed without shareholder approval:

The MFS Money Market Portfolio will not:

(1) invest in illiquid investments if more than 5% of the Fund’s net assets (taken at market value) would be invested in such securities.

Each Fund (except MFS Money Market Portfolio) will not:

(1) invest in illiquid investments, including securities subject to legal or contractual restrictions on resale or for which there is no readily available market (e.g., trading in the security is suspended, or, in the case of unlisted securities, where no market exists), if more than 15% of the Fund’s net assets (taken at market value) would be invested in such securities. Repurchase agreements maturing in more than seven days will be deemed to be illiquid for purposes of the Fund’s limitation on investment in illiquid securities. Securities that are not registered under the Securities Act of 1933, as amended, and sold in reliance on Rule 144A thereunder, but are determined to be liquid by the Trust’s Board of Trustees (or its delegee) will not be subject to this 15% limitation.