The Pioneer Municipal High Income Fund, Inc. (MHI) is a mutual fund that focuses on investing in high-yield municipal bonds. These bonds are issued by state and local governments to fund various projects and are considered to be relatively safe investments. The fund aims to provide investors with a steady stream of tax-free income while also seeking to preserve capital. MHI may also invest in other fixed-income securities, such as corporate bonds, to diversify its portfolio. This fund is suitable for investors seeking a tax-efficient way to generate income while also maintaining a moderate level of risk.