Fund Description: To pursue its goal, the fund normally invests at least 80% of its net assets, plus any borrowings for investment purposes, in U.S. dollar-denominated fixed-income securities that provide income exempt from federal personal income tax (municipal bonds). It may invest up to 20% of its assets in taxable fixed-income securities, including taxable municipal bonds and non-U.S. dollar-denominated foreign debt securities such as Brady bonds and sovereign debt obligations.