ISHARES NATIONAL MUNI BOND ETF ETF

The investment seeks to track the investment results of the S&P National AMT-Free Municipal Bond IndexTM. The fund generally will invest at least 80% of its assets in the component securities of the underlying index and may invest up to 20% of its assets in certain futures, options and swap contracts, cash and cash equivalents. The index measures the performance of the investment-grade segment of the tax-exempt U.S. municipal bond market.