The investment seeks to provide current income that is generally exempt from federal income taxes and long-term total return. The fund invests in investment grade and non-investment grade municipal securities (known as junk bonds) that the sub-adviser considers to be attractive from a yield perspective while considering total return. At least 80% of the fund's net assets must be invested in municipal securities, and up to 35% of its net assets may be invested in non-investment grade municipal securities. The fund may invest in securities of any maturity or duration.