The Nuveen Select Maturities Municipal Fund, established in the United States on September 18, 1992, is a closed-end mutual fund concentrating on fixed income. Initially launched by Nuveen Investments, Inc., it is now jointly managed by Nuveen Fund Advisors LLC and Nuveen Asset Management, LLC. This fund primarily allocates capital to municipal debt instruments within the U.S. fixed income landscape, specifically targeting those with a credit rating of Baa/BBB or better. A key feature for investors is that the income generated from these holdings is exempt from federal taxation. The portfolio is constructed using a bottom-up security selection methodology guided by fundamental analysis. Its performance is evaluated against the S&P Intermediate Municipal Bond Index and the S&P National Municipal Bond Index.