Nuveen Premium Income Municipal Fund, Inc. operates as a closed-end, diversified management investment company in the United States. The fund invests primarily in a diversified portfolio of municipal obligations issued by state and local government authorities. Its investment portfolio also comprises investments in companies operating in various industries, including healthcare, utilities, and transportation sectors, as well as in education and civic organizations. Nuveen Premium Income Municipal Fund was founded in 1988 and is based in Chicago, Illinois.