iShares 20+ Year Treasury Bond BuyWrite Strategy ETF is an exchange traded fund launched by BlackRock, Inc. It is managed by BlackRock Fund Advisors. The fund invests in fixed income markets of the United States. The fund invests through derivatives in U.S. dollar denominated fixed rate U.S. treasury securities with remaining maturity of greater than or equal to twenty years. It employs long/short strategy and uses derivatives such as options to create its portfolio. The fund seeks to track the performance of the Cboe TLT 2% OTM BuyWrite Index, by using representative sampling technique. IShares 20+ Year Treasury Bond BuyWrite Strategy ETF is domiciled in the United States.