The Strategic Advisers Municipal Bond Fund (FSMUX) 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. The fund is managed by Strategic Advisers, a subsidiary of Fidelity Investments, and aims to provide investors with a steady stream of tax-free income while also preserving capital. FSMUX may be a suitable option for investors seeking a low-risk, tax-efficient investment with potential for long-term growth.