The Blackrock Municipal Income Trust (BFK) 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. BFK is managed by Blackrock, one of the largest investment management firms in the world, and has a diversified portfolio of municipal bonds from various regions and sectors. This fund may be suitable for investors seeking tax-exempt income and a conservative investment approach.