The fund normally invests at least 80% of assets in stocks of companies with medium market capitalizations (which, for purposes of this fund, are those companies with market capitalizations similar to companies in the Russell Midcap ® Index or the S&P MidCap 400 ® Index). It potentially invests in companies with smaller or larger market capitalizations. The fund invests in domestic and foreign issuers. It invests in either growth stocks or value stocks or both.