To pursue its goal, the fund generally invests in securities that are included in the Russell Midcap® Index. It is the fund's policy that under normal circumstances it will invest at least 90% of its net assets (including, for this purpose, any borrowings for investment purposes) in securities included in the index. The Russell Midcap Index measures the performance of the mid-cap segment of the U.S. equity universe. It is a subset of the Russell 1000® Index, representing the smallest issuers in the Russell 1000 Index.