The investment seeks capital growth over the long-term. The fund normally invests at least 80% of its assets (net assets plus the amount of any borrowings made for investment purposes) in a broad portfolio of common stocks of companies with market capitalizations equal to those within the universe of Russell MidCap Growth Index stocks at the time of purchase. It may use derivatives to hedge various investments, for risk management and to increase the fund's income or gain. The fund may also invest up to 20% of its total assets in all types of foreign securities.