The fund invests at least 80% of its net assets (plus borrowings for investment purposes) in securities the income from which, in the opinion of counsel to the issuer of each security, is exempt from regular federal individual and, as applicable, the fund's state income tax. It invests mainly in New York municipal securities that pay interest that, in the opinion of counsel to the issuer of each security, is exempt from federal and New York personal income taxes. The fund can invest up to 25% of its total assets in below-investment-grade securities (commonly called "junk bonds").