MFS® U.S. Government Money Market Fund

Effective February 27, 2009, new purchases into this fund have been suspended. Please see the prospectus for more information on purchase restrictions.

Facts and Overview

Insightful Investing

This publication is authorized for distribution only when preceded or accompanied by a prospectus, or summary prospectus, for the portfolio being offered. Consider the fund's investment objectives, risks, charges and expenses. Contact MFS or view online. Read it carefully.