BlackRock National Municipal Fund (BlackRock National Muni A) fond

The fund seeks to achieve its objective by investing at least 80% of its assets in municipal bonds. Although the advisor intends to invest at least 65% of the fund's net assets in municipal bonds rated investment grade or in unrated municipal bonds that fund management believes are of comparable quality, it is possible that in the future the fund could invest up to 100% of its assets in "junk bonds." It will primarily invest in municipal bonds that have a maturity of five years or longer.