The Morningstar Municipal Bond Fund (MSTPX) is a mutual fund that primarily invests in municipal bonds. These bonds are issued by state and local governments to fund public projects such as schools, roads, and utilities. This fund aims to provide investors with a steady stream of tax-free income while also preserving their capital. It is managed by Morningstar, a leading investment research and management company, and may be a suitable option for investors seeking a low-risk, tax-efficient investment option.