The Eaton Vance High Yield Municipal Income Fund Class A (ticker: ETHYX) is a mutual fund that primarily invests in high-yield municipal bonds. These bonds are issued by state and local governments and are considered to have a lower risk of default compared to corporate bonds. The fund aims to provide investors with a steady stream of tax-free income while also seeking to preserve capital. It is managed by Eaton Vance, a well-established investment management firm.