. . . "Federally tax-free but other state and local taxes may apply.INDEX DESCRIPTIONSThe Barclays US Aggregate Bond Index is a broad-based index that measures the investment grade,US dollar-denominated, fixed-rate taxable bond market.The Barclays Municipal Bond Index is a market capitalization-weighted index of investment-grademunicipal bonds with maturities of at least one year." .