Nuveen California Select Tax-Free Income Portfolio is a closed-ended fixed income mutual fund launched by Nuveen Investments Inc. The fund is co-managed by Nuveen Fund Advisors LLC and Nuveen Asset Management, LLC. It invests in the fixed income markets of California. The fund invests in the securities of companies that operate across diversified sectors. It primarily invests in municipal bonds. The fund employs fundamental analysis to create its portfolio. It benchmarks the performance of its portfolio against Barclays Capital California Municipal Bond Index and S&P California Municipal Bond Index. Nuveen California Select Tax-Free Income Portfolio was formed on June 19, 1992 and is domiciled in the United States.