The Fund's investment objective is current income exempt from regular federal income tax, consistent with preservation of capital. The Fund invests in municipal securities that are exempt from federal income taxes. The Fund invests at least 80% of its managed assets in municipal securities rated investment grade (Baa/BBB or better by S&P, Moody's, or Fitch) at the time of investment, or, if they are unrated, are judged by the manager to be of comparable quality.