The investment seeks to track the investment results of the Dow Jones U.S. Select Dividend Index composed of relatively high dividend paying U.S. equities. The fund seeks to track the investment results of the underlying index, which measures the performance of the U.S.'s leading stocks by dividend yield. Dividend yield is calculated using a stock's indicated annual dividend (not including any special dividends) divided by its price. The underlying index is composed of 100 of the highest dividend-yielding securities (excluding REITs) in the Dow Jones U.S. Index, a broad-based index representative of the total market for U.S. equity securities.