iShares U.S. Oil & Gas Exploration & Production ETF (IEO)

The fund generally will invest at least 80% of its assets in the component securities of its underlying indexand may invest up to 20% of its assets in certain futures, options and swap contracts, cash and cash equivalents, including shares of money market funds advised by BFA or its affiliates, as well as in securities not included in the underlying index, but which BFA believes will help the fund track the underlying index. The fund is non-diversified.