MFS New Discovery Value Fund (Prospectus Summary) | MFS New Discovery Value 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 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 6 of the fund's prospectus and "Waivers of Sales Charges" on page 11 of the
fund's statement of additional information Part I.

Shareholder Fees (fees paid directly from your investment):

Shareholder Fees MFS New Discovery Value Fund	A		B	C	I	R1	R2	R3	R4
Shareholder Fees, Column Name	A		B	C	I	ALL R	ALL R	ALL R	ALL R
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	5.75%		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

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

Annual Fund Operating Expenses MFS New Discovery Value Fund	A	B	C	I	R1	R2	R3	R4
Operating Expenses, Column Name	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%	none	1.00%	0.50%	0.25%	none
Other Expenses	0.21%	0.21%	0.21%	0.21%	0.21%	0.21%	0.21%	0.21%
Total Annual Fund Operating Expenses	1.36%	2.11%	2.11%	1.11%	2.11%	1.61%	1.36%	1.11%

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 New Discovery Value Fund (USD $)	Expense Example, By Year, Column Name	Expense Example, With Redemption, 1 Year	Expense Example, With Redemption, 3 Years
A	Class A Shares	706	981
B	Class B Shares assuming redemption at end of period	614	961
C	Class C Shares assuming redemption at end of period	314	661
I	Class I Shares	113	353
R1	Class R1 Shares	214	661
R2	Class R2 Shares	164	508
R3	Class R3 Shares	138	431
R4	Class R4 Shares	113	353

Expense Example, No Redemption MFS New Discovery Value Fund (USD $)	Expense Example, No Redemption, By Year, Column Name	Expense Example, No Redemption, 1 Year	Expense Example, No Redemption, 3 Years
B	Class B Shares assuming no redemption at end of period	214	661
C	Class C Shares assuming no redemption at end of period	214	661

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.

Principal Investment Strategies

MFS (Massachusetts Financial Services Company, the fund's investment adviser)
normally invests the fund's assets primarily in equity securities. Equity
securities include common stocks, preferred stocks, securities convertible into
stocks, and depositary receipts for those securities.

MFS focuses on investing the fund's assets in the stocks of companies it
believes are undervalued compared to their perceived worth (value companies).

While MFS may invest the fund's assets in companies of any size, MFS generally
focuses on companies with small capitalizations.

MFS may invest the fund's assets in foreign securities.

MFS uses a bottom-up investment approach to buying and selling investments for
the fund. Investments are selected primarily based on fundamental analysis of
individual issuers and their potential in light of their current financial
condition, and market, economic, political, and regulatory conditions. Factors
considered may include analysis of an issuer's earnings, cash flows, competitive
position, and management ability. Quantitative models that systematically
evaluate an issuer's valuation, price and earnings momentum, earnings quality,
and other factors may also be considered.

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.

Value Company Risk:  The stocks of value companies can continue to be
undervalued for long periods of time and not realize their expected value and
can be more volatile than the market in general.

Small Cap Risk:  The stocks of small cap companies can be more volatile than
stocks of larger companies.

Foreign Risk:  Exposure to foreign 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.

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.

Liquidity Risk:  It may not be possible to sell certain investments, types of
investments, and/or segments of the market at any particular time or at an
acceptable price.

Performance Information

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

[1] On shares purchased without an initial sales charge and redeemed within 24 months of purchase.