The investment seeks to provide investment results that correspond to the total return of stocks of mid- to small-capitalization United States companies. The fund normally invests at least 80% of assets in common stocks included in the Dow Jones U.S. Completion Total Stock Market Index, which represents the performance of stocks of mid- to small-capitalization U.S. companies. It uses statistical sampling techniques based on such factors as capitalization, industry exposures, dividend yield, price/earnings (P/E) ratio, price/book (P/B) ratio, and earnings growth to attempt to replicate the returns of the index using a smaller number of securities.