iShares U.S. Energy ETF(AMEX:IYE)

IYE covers the energy segment of the US large-cap equity market. The fund holds a concentrated portfolio of companies that facilitate production and distribution of oil and gas. The underlying index is part of Russells US large cap sector indicesa series of representative indices that integrates ICBs sector classification framework on Russell 1000. Holdings are market-cap-weighted, subject to regulatory capping which limits single security weights at 22.5% and aggregate weight of securities exceeding 4.5% allocation at 45%. Index rebalancing occurs quarterly. Prior to September 20, 2021, the fund tracked the Dow Jones U.S. Oil & Gas Index.