NUVBX is a mutual fund that focuses on investing in intermediate duration municipal bonds. These bonds are issued by state and local governments to fund public projects and services. The fund is managed by Nuveen, a leading investment firm, and is classified as Class I, indicating it is designed for institutional investors. This fund aims to provide investors with a steady stream of tax-free income while maintaining a moderate level of risk. It may be a suitable option for those seeking a conservative investment with potential tax benefits.