The investment seeks to track as closely as possible, before fees and expenses, the total return of the Dow Jones U.S. Large-Cap Total Stock Market Index. To pursue its goal, the fund generally invests in stocks that are included in the Dow Jones U.S. Large-Cap Total Stock Market Index. The index includes the large-cap portion of the Dow Jones U.S. Total Stock Market Index actually available to investors in the marketplace. The Dow Jones U.S. Large-Cap Total Stock Market Index includes the components ranked 1-750 by full market capitalization. The index is a float-adjusted market capitalization weighted index.