National AMT-Free Muni Bond iShares

iShares National AMT-Free Muni Bond ETF (the Fund), formerly iShares S&P National AMT-Free Municipal Bond Fund, is an exchange-traded fund (ETF). The Fund seeks investment results that correspond generally to the price and yield performance of the S&P National AMT-Free Municipal Bond Index (the Index). The Index measures the performance of the investment-grade segment of the United States municipal bond market. The Fund invests in a representative sample of the securities included in the Index that collectively has an investment profile similar to the Index. Due to the use of representative sampling, the Fund may or may not hold all of the securities that are included in the Index. The Fund’s investment advisor is BlackRock Fund Advisors (formerly known as Barclays Global Fund Advisors).