The investment seeks to track the investment results of an index composed of U.S. equities in the real estate sector. The fund generally invests at least 90% of its assets in securities of the underlying index and in depositary receipts representing securities of the underlying index. It seeks to track the investment results of the Dow Jones U.S. Real Estate Index (the "underlying index"), which measures the performance of the real estate sector of the U.S. equity market. The underlying index may include large-, mid- or small-capitalization companies, and components primarily include real estate investment trusts ("REITs").