The Bridge Builder Municipal High-Income Bond Fund (BBMHX) is a mutual fund that primarily invests in municipal bonds with the goal of generating high levels of income for investors. These bonds are issued by state and local governments to fund various projects and are generally considered to be low-risk investments. The fund may also invest in other fixed-income securities, such as corporate bonds, to diversify its portfolio. With a focus on high-income bonds, this fund may be suitable for investors seeking regular income and potential tax benefits.