iShares Dow Jones U.S. Oil & Gas Exploration & Production Index Fund (the Fund) seeks investment results that correspond generally to the price and yield performance of the Dow Jones U.S. Select Oil Exploration & Production Index (the Index). The Index measures the performance of the oil exploration and production sub-sector of the United States equity market, and includes companies that are engaged in the exploration for and extraction, production, refining and supply of oil and gas products. The Fund invests in a representative sample of securities included in the Index that collectively has an investment profile similar to the Index. The Fund’s investment advisor is Barclays Global Fund Advisors.