The Nuveen New York Select Tax-Free Income Portfolio (NXN) operates as a closed-end mutual fund, originally launched by Nuveen Investments Inc., specializing in fixed-income securities. The fund's oversight is shared between Nuveen Fund Advisors LLC and Nuveen Asset Management, LLC. It strategically allocates capital within New York's debt markets, with a primary focus on municipal bonds from various sectors. The portfolio targets an average credit quality of Baa/BBB or better for its bond holdings. To build its investment mix, the fund utilizes a fundamental analysis approach. Its financial results are measured against two prominent benchmarks: the Barclays Capital New York Municipal Bond Index and the S&P New York Municipal Bond Index. This U.S.-based portfolio commenced operations on June 19, 1992.