To provide a high level of current income exempt from regular federal income tax. Distinguishing Characteristics Primarily invests in state, municipal and public authority bonds and notes. Normally, at least 80% of assets will be invested in tax-exempt securities. (May invest up to 100% of assets in bonds whose interest may be subject to the alternative minimum tax.) The fund will normally invest at least 60% of assets in debt securities rated BBB+ or below or Baa1 or below at the time of purchase by Nationally Recognized Statistical Rating Organizations designated by the fund’s investment adviser, or unrated but determined by the fund’s investment adviser to be of equivalent quality.