The BlackRock Municipal Income Fund, Inc. (MUI) is a mutual fund that primarily invests in municipal bonds issued by state and local governments. These bonds are used to fund public projects such as schools, roads, and utilities. The fund aims to provide investors with a steady stream of tax-free income while also preserving capital. Managed by BlackRock, one of the largest investment management firms in the world, MUI offers a diversified portfolio of high-quality municipal bonds with varying maturities and credit ratings. This fund is suitable for investors seeking tax-exempt income and a conservative investment approach.