The iShares Core SP 500 ETF seeks to track the investment results of an index composed of large-capitalization U.S. equities. The Fund seeks investment results that correspond generally to the price and yield performance, before fees and expenses, of the SP 500 Index (the Underlying Index). The Underlying Index measures the performance of the large-capitalization sector of the U.S. equity market. The Underlying Index includes approximately 82.9% of the market capitalization of all publicly-traded U.S. equity securities. The component stocks are weighted according to the float-adjusted market value of their outstanding shares. 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.