The MainStay MacKay High Yield Municipal Bond Fund, Class Investor (MMHVX) is a mutual fund that primarily invests in high-yield municipal bonds. These bonds are issued by state and local governments to fund various projects and are considered to have a lower risk of default compared to corporate bonds. This fund aims to provide investors with a steady stream of income through the interest payments from these bonds. It is managed by MainStay Investments and MacKay Municipal Managers and is suitable for investors seeking a combination of income and potential tax benefits.