iShares U.S. Preferred Stock ETF (the Fund) is an exchange-traded fund. The Fund seeks investment results, which correspond to the price and yield performance, before fees and expenses, of the S&P U.S. Preferred Stock Index (the Underlying Index). The Underlying Index measures the performance of a select group of preferred stocks listed on the New York Stock Exchange (NYSE), NYSE Arca, Inc. (NYSE Arca), NYSE Amex, NASDAQ Global Select Market, NASDAQ Select Market or NASDAQ Capital Market. The Underlying Index includes preferred stocks with a market capitalization over $100 million, which meet minimum price, liquidity, trading volume, maturity and other requirements determined by Standard & Poor�s Financial Services LLC, a subsidiary of The McGraw Hill Companies (S&P). BlackRock Fund Advisors acts as an investment adviser of the Fund.