MFS® Blended Research® Emerging Markets Equity Fund

MFS® Blended Research® Emerging Markets Equity Fund Summary of Key Information

Investment Objective

The fund’s investment objective is to seek capital appreciation.

Fees and Expenses

This table describes the fees and expenses that you may pay when you buy and hold shares of the fund. The annual fund operating expenses are based on estimated “Other Expenses” for the current fiscal year expressed as a percentage of the fund’s estimated average net assets during the period.

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 H-1 of the fund’s Statement of Additional Information (“SAI”).

Shareholder Fees (fees paid directly from your investment):

Shareholder Fees - MFS® Blended Research® Emerging Markets Equity Fund	A		B	C	I	R1	R2	R3	R4	R5
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	5.75%		none	none	none	none	none	none	none	none
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or redemption proceeds, whichever is less)	1.00%	[1]	4.00%	1.00%	none	none	none	none	none	none

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment):

Annual Fund Operating Expenses - MFS® Blended Research® Emerging Markets Equity Fund		A	B	C	I	R1	R2	R3	R4	R5
Management Fee		0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%	0.75%
Distribution and/or Service (12b-1) Fees		0.25%	1.00%	1.00%	none	1.00%	0.50%	0.25%	none	none
Other Expenses		1.97%	1.97%	1.97%	1.97%	1.97%	1.97%	1.97%	1.97%	1.93%
Total Annual Fund Operating Expenses		2.97%	3.72%	3.72%	2.72%	3.72%	3.22%	2.97%	2.72%	2.68%
Fee Reductions and/or Expense Reimbursements	[1]	(1.73%)	(1.73%)	(1.73%)	(1.73%)	(1.73%)	(1.73%)	(1.73%)	(1.73%)	(1.73%)
Total Annual Fund Operating Expenses After Fee Reductions and/or Expense Reimbursements		1.24%	1.99%	1.99%	0.99%	1.99%	1.49%	1.24%	0.99%	0.95%

Example

This example is intended to help you compare the cost of investing in the fund with the cost of investing in other mutual funds.

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 the fund’s operating expenses remain the same.

Although your actual costs will likely be higher or lower, under these assumptions your costs would be:

Expense Example - MFS® Blended Research® Emerging Markets Equity Fund - USD ($)	1 YEAR	3 YEARS
A	694	1,246
B	602	1,236
C	302	936
I	101	636
R1	202	936
R2	152	787
R3	126	712
R4	101	636
R5	97	624

Expense Example No Redemption - MFS® Blended Research® Emerging Markets Equity Fund - USD ($)	1 YEAR	3 YEARS
B	202	936
C	202	936

Portfolio Turnover

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. The portfolio turnover rate for the fund as of August 31, the fiscal year end of the fund, is not available because the fund had not commenced operations as of August 31.

Principal Investment Strategies

MFS (Massachusetts Financial Services Company, the fund’s investment adviser) normally invests at least 80% of the fund’s net assets in equity securities of issuers that are tied economically to emerging market countries. Emerging market countries are countries whose financial and capital markets are in the development phase and include countries located in Latin America, Asia, Africa, the Middle East, and developing countries of Europe, primarily Eastern Europe.

Equity securities include common stocks and other securities that represent an ownership interest (or right to acquire an ownership interest) in a company or other issuer.

MFS may invest the fund’s assets in companies of any size.

MFS may invest a large percentage of the fund’s assets in issuers in a single country, a small number of countries, or a particular geographic region.

MFS uses a bottom-up approach to buying and selling investments for the fund. Investments are selected primarily based on blending fundamental and quantitative research. MFS uses fundamental analysis of individual issuers to create a fundamental rating for an issuer.  MFS uses quantitative models to create a quantitative rating for an issuer. MFS then constructs the portfolio considering the blended rating from combining the fundamental rating and the quantitative rating, as well as issuer, industry, and sector weightings, market capitalization, measures of expected volatility of the fund’s return (e.g., predicted beta and predicted tracking error), and other factors, with a goal of constructing a portfolio that over time has a consistent level of active risk compared to the MSCI Emerging Markets Index. Active risk is the risk resulting from investment selection rather than market risk.

Principal Risks

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.

The principal risks of investing in the fund are:

Stock Market/Company Risk:  Stock markets are volatile and can decline significantly in response to issuer, market, economic, industry, political, regulatory, geopolitical, and other conditions, as well as to investor perceptions of these 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.

Investment Strategy Risk:  The fund’s strategy to blend fundamental and quantitative research and to have a consistent level of active risk over time may not produce the intended results. In addition, MFS fundamental research is not available for all issuers.

Foreign Risk:  Exposure to foreign markets through issuers or currencies can involve additional risks relating to market, economic, industry, political, regulatory, geopolitical, and 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 Risk:  Investments in emerging markets can involve additional and greater risks than the risks associated with investments in developed foreign markets.  Emerging markets can have less developed markets, greater custody and operational risk, less developed legal, regulatory, and accounting systems, 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, industry, political, regulatory, geopolitical, and 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 Focus Risk: The fund’s performance will be closely tied to the market, currency, economic, political, regulatory, geopolitical, and other conditions in the countries or regions in which the fund’s assets are invested.

Liquidity Risk:  It may be difficult to value, and it may not be possible to sell, certain investments, types of investments, and/or investments in certain segments of the market, and the fund may have to sell certain of these investments at a price or time that is not advantageous in order to meet redemptions or other cash needs.

Investment Selection Risk:  MFS’ investment analysis, its development and use of quantitative models, and its selection of investments may not produce the intended results and/or 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. Investments selected using quantitative models may not produce the intended results due to the factors used in the models, the weight placed on each factor in the models, changing sources of market return, and technical issues in the design, development, implementation, and maintenance of the models (e.g., incomplete or inaccurate data, programming or other software issues, and technology failures).

Performance Information

The bar chart and performance table are not included because the fund has not had a full calendar year of operations.

[1] This contingent deferred sales charge (CDSC) applies to shares purchased without an initial sales charge and redeemed within 18 months of purchase.

[1] Massachusetts Financial Services Company has agreed in writing to bear the fund's expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, and investment-related expenses (such as interest and borrowing expenses incurred in connection with the fund's investment activity), such that ''Total Annual Fund Operating Expenses" do not exceed 1.24% of the fund's average daily net assets annually for each of Class A and Class R3 shares, 1.99% of the fund's average daily net assets annually for each of Class B, Class C, and Class R1 shares, 0.99% of the fund's average daily net assets annually for each of Class I and Class R4 shares, 1.49% of the fund's average daily net assets annually for Class R2 shares, and 0.95% of the fund's average daily net assets annually for Class R5 shares. This written agreement will continue until modified by the fund's Board of Trustees, but such agreement will continue until at least December 31, 2016.