Under normal market conditions, the fund invests at least 80% of its net assets in a diversified portfolio of municipal obligations, the interest on which is exempt from regular federal income tax. The fund normally invests in municipal obligations rated A or higher by S&P Global Ratings, Fitch Ratings or Moody"s Investors Service, Inc. or, if unrated, determined by the Subadvisor to be of comparable quality at the time of purchase.