The investment seeks to track the investment results of a broad-based index composed of U.S. equities. 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 S&P Composite 1500® (the "underlying index"), which comprises the S&P 500®, S&P MidCap 400® and S&P SmallCap 600®, which together represent approximately 89% of the total U.S. equity market as of March 31, 2013.