iShares PHLX Semiconductor ETF, formerly iShares PHLX SOX Semiconductor Sector Index Fund (the Fund), is an exchange-traded fund. The Fund seeks investment results that correspond generally to the price and yield performance, before fees and expenses, of the United States-listed semiconductor stocks as represented by the PHLX Semiconductor Sector Index (the Index). The Index is an equity benchmark for the United States-listed semiconductor stocks. The Index includes companies primarily involved in the design, distribution, manufacture and sale of semiconductors. The Fund generally invests at least 90% of its assets in securities of the Index and in depositary receipts representing securities of the Index. BlackRock Fund Advisors (BFA) serves as the investment adviser to the Fund.