The investment seeks total return with an emphasis on income exempt from federal income tax, but also considering capital appreciation. The fund invests normally at least 80% of its net assets in securities and other investments, the interest on which is exempt from federal income tax. Interest from its investments may be subject to the federal alternative minimum tax. The fund normally invests its assets primarily in municipal instruments. It may invest 25% or more of its total assets in municipal instruments that finance similar projects, such as those relating to education, healthcare, housing, utilities, water, or sewers.