mweprospectus.htm

Before you invest, you may want to review the fund’s prospectus, which contains more information about the fund and its risks. You can find the fund’s prospectus and other information about the fund, including the fund’s statement of additional information, online at funds.mfs.com. You can also get this information at no cost by calling 1-800-225-2606 or by sending an e-mail request to orderliterature@mfs.com. The fund’s prospectus and statement of additional information, both dated March 1, 2010, as may be supplemented from time to time, are incorporated by reference into this Summary Prospectus.

You may qualify for sales charge reductions if you and certain members of your family invest, or agree to invest in the future, at least $50,000 in MFS Funds. More information about these and other waivers and reductions is available from your financial intermediary and in “Sales Charges and Waivers or Reductions” on page 7 of the fund’s prospectus and “Waivers of Sales Charges” on page 13 of the fund’s statement of additional information Part I.

Share Class	A	B	C	I	ALL R
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	5.75%	N/A	N/A	N/A	N/A
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, whichever is less)	1.00%#	4.00%	1.00%	N/A	N/A

Share Class	A	B	C	I	R1	R2	R3	R4
Management Fee	0.90%	0.90%	0.90%	0.90%	0.90%	0.90%	0.90%	0.90%
Distribution and/or Service (12b-1) Fees	0.25%	1.00%	1.00%	N/A	1.00%	0.50%	0.25%	N/A
Other Expenses	0.39%	0.39%	0.39%	0.39%	0.39%	0.39%	0.39%	0.39%
Total Annual Fund Operating Expenses	1.54%	2.29%	2.29%	1.29%	2.29%	1.79%	1.54%	1.29%

The example assumes that: you invest $10,000 in the fund for the time periods indicated and you redeem your shares at the end of the time periods (unless otherwise indicated); your investment has a 5% return each year and dividends and other distributions are reinvested; and the fund’s operating expenses remain the same.

	1 YEAR		3 YEARS		5 YEARS		10 YEARS
Class A Shares	$	723	$	1,033	$	1,366	$	2,304
Class B Shares assuming
redemption at end of period	$	632	$	1,015	$	1,425	$	2,438
no redemption	$	232	$	715	$	1,225	$	2,438
Class C Shares assuming
redemption at end of period	$	332	$	715	$	1,225	$	2,626
no redemption	$	232	$	715	$	1,225	$	2,626
Class I Shares	$	131	$	409	$	708	$	1,556
Class R1 Shares	$	232	$	715	$	1,225	$	2,626
Class R2 Shares	$	182	$	563	$	970	$	2,105
Class R3 Shares	$	157	$	486	$	839	$	1,835
Class R4 Shares	$	131	$	409	$	708	$	1,556

The fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when shares are held in a taxable account. These transaction costs, which are not reflected in “Annual Fund Operating Expenses” or in the “Example,” affect the fund’s performance. During the most recent fiscal year, the fund’s portfolio turnover rate was 17% of the average value of its portfolio.

In selecting investments for the fund, MFS is not constrained to any particular investment style. MFS may invest the fund’s assets in the stocks of companies it believes to have above average earnings growth potential compared to other companies (growth companies), in the stocks of companies it believes are undervalued compared to their perceived worth (value companies), or in a combination of growth and value companies.

MFS uses a bottom-up approach to buying and selling investments for the fund. Investments are selected primarily based on fundamental analysis of issuers. Quantitative models that systematically evaluate issuers may also be considered.

As with any mutual fund, the fund may not achieve its objective and/or you could lose money on your investment in the fund. An investment in the fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other governmental agency.

Stock Market/Company Risk: Stock markets are volatile and can decline significantly in response to issuer, market, economic, political, regulatory, geopolitical, and other conditions. The price of an equity security can decrease significantly in response to these conditions, and these conditions can affect a single issuer or type of security, issuers within a broad market sector, industry or geographic region, or the market in general.

Foreign and Emerging Markets Risk: Exposure to foreign markets, especially emerging markets, through issuers or currencies can involve additional risks relating to market, economic, political, regulatory, geopolitical, or other conditions. These factors can make foreign investments, especially those in emerging markets, more volatile and less liquid than U.S. investments. In addition, foreign markets can react differently to these conditions than the U.S. market. Emerging markets can have less market structure, depth, and regulatory oversight and greater political, social, and economic instability than developed markets.

Currency Risk: The value of foreign currencies relative to the U.S. dollar fluctuates in response to market, economic, political, regulatory, geopolitical or other conditions, and a decline in the value of a foreign currency versus the U.S. dollar reduces the value in U.S. dollars of investments denominated in that foreign currency.

Geographic Concentration Risk: The fund’s performance could be closely tied to the market, currency, economic, political, regulatory, geopolitical, or other conditions in the countries or regions in which the fund invests and could be more volatile than the performance of more geographically-diversified funds.

Derivatives Risk: Derivatives can be used to take both long and short positions. Derivatives can be highly volatile and involve risks in addition to the risks of the underlying indicator(s) on which the derivative is based. Gains or losses from derivatives can be substantially greater than the derivatives’ original cost and can involve leverage.

Investment Selection Risk: The MFS analysis of an investment can be incorrect and can lead to an investment focus that results in the fund underperforming other funds with similar investment strategies and/or underperforming the markets in which the fund invests.

Counterparty and Third Party Risk: Transactions involving a counterparty or third party other than the issuer of the instrument are subject to the credit risk of the counterparty or third party, and to the counterparty’s or third party’s ability to perform in accordance with the terms of the transaction.

The bar chart and performance table below are intended to indicate some of the risks of investing in the fund by showing changes in the fund’s performance over time and how the fund’s performance over time compares with that of a broad measure of market performance.

The chart and table provide past performance information. The fund’s past performance (before and after taxes) does not indicate how the fund will perform in the future. Updated performance is available online at mfs.com or by calling 1-800-225-2606.

Bar Chart. The bar chart does not take into account any sales charges (loads) that you may be required to pay upon purchase or redemption of the fund’s shares. If these sales charges were included, they would reduce the returns shown.

During the period(s) shown in the bar chart, the highest quarterly return was 18.83% (for the calendar quarter ended June 30, 2009) and the lowest quarterly return was (18.24)% (for the calendar quarter ended December 31, 2008).

Share Class	1 YEAR	5 YEARS	10 YEARS
Returns Before Taxes
B Shares, with CDSC (Declining over Six Years from 4% to 0%)	26.22%	3.62%	2.78%
C Shares, with CDSC (1% for 12 Months)	29.27%	3.93%	2.64%
I Shares, at Net Asset Value	31.54%	4.96%	3.66%
R1 Shares, at Net Asset Value	30.22%	3.85%	2.60%
R2 Shares, at Net Asset Value	30.90%	4.33%	2.87%
R3 Shares, at Net Asset Value	31.19%	4.61%	3.37%
R4 Shares, at Net Asset Value	31.49%	4.88%	3.50%
A Shares, With Initial Sales Charge (5.75%)	23.65%	3.46%	2.80%
Returns After Taxes (Class A Shares Only)
A Shares’ Return After Taxes on Distributions, with Initial Sales Charge (5.75%)	23.64%	2.35%	2.06%
A Shares’ Return After Taxes on Distributions and Sale of Class A Shares, with Initial Sales Charge (5.75%)	15.73%	2.99%	2.31%
Benchmark Comparisons (Returns Before Taxes)
MSCI World Index (gross div)	30.79%	2.57%	0.23%

After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. Your actual after-tax returns will depend on your own tax situation, and will likely differ from those shown. The after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. The after-tax returns are shown for only one of the fund’s classes of shares, and after-tax returns for the fund’s other classes of shares will vary from the returns shown.

The fund commenced investment operations December 29, 1986, with the offering of Class B shares, and subsequently offered Class A shares on September 7, 1993, Class C shares on January 3, 1994, Class I shares on January 2, 1997, Class R2 shares on October 31, 2003, and Class R1, R3, and R4 shares on April 1, 2005.

Performance for each of Class R3 and Class R4 shares includes the performance of the fund’s Class A shares for periods prior to their offering. Performance for each of Class R1 and Class R2 shares includes the performance of the fund’s Class B shares for periods prior to their offering. Blended class performance has been adjusted to take into account differences in sales loads, if any, applicable to these share classes, but has not been adjusted to take into account differences in class specific operating expenses (such as Rule 12b-1 fees). The use of blended performance generally results in higher performance for share classes with higher operating expenses than those of the share class to which they are blended, and lower performance for share classes with lower operating expenses than those of the share class to which they are blended.

You may purchase and redeem shares of the fund each day the New York Stock Exchange is open for trading. You may purchase or redeem shares either by having your financial intermediary process your purchase or redemption, or by overnight mail (MFS Service Center, Inc. (MFSC), c/o Boston Financial Data Services, 30 Dan Road, Canton, MA 02021-2809), by mail ([Fund Name], P.O. Box 55824, Boston, MA 02205-5824), by telephone (1-800-225-2606), or via the Internet at mfs.com (MFS Access).

The fund’s initial and subsequent investment minimums generally are as follows. Minimums may be waived or reduced for certain types of investors and investments and your financial intermediary may have different minimums.

Class	Initial Minimum	Subsequent Minimum
Class A, Class B, Class C	None – automatic investment plans and certain asset-based fee programs $25 – employer-sponsored retirement plans $250 – Traditional and Roth IRAs $1,000 – other accounts	$50 – by check and non-systematic written exchange request, and via MFSC telephone representatives None – other purchases
Class I, Class R1, Class R2, Class R3, Class R4	None	None

Taxes

If you purchase shares of the fund through a financial intermediary, the fund, MFS, and MFS’ affiliates may pay the financial intermediary for the sale of shares of a fund and/or the servicing of shareholder accounts. These payments may create a conflict of interest by influencing your financial intermediary to recommend the fund over another investment. Ask your financial intermediary or visit your financial intermediary’s Web site for more information.

CLASS	TICKER SYMBOL
Class A	MWEFX
Class B	MWEBX
Class C	MWECX
Class I	MWEIX
Class R1	MWEGX
Class R2	MEQRX
Class R3	MWEHX
Class R4	MWELX

Portfolio Manager	Since	Title
David Mannheim	1992	Investment Officer of MFS
Roger Morley	2009	Investment Officer of MFS