The fund normally invests substantially all of its net assets in municipal bonds that provide income exempt from federal personal income tax. It invests principally in municipal bonds with remaining maturities of five years or less and generally maintains a dollar-weighted average portfolio maturity of one to three years. The fund invests at least 80% of its net assets in municipal bonds rated investment grade at the time of purchase or the unrated equivalent as determined by the fund's sub-adviser. It is non-diversified.