NPSRX is a mutual fund that focuses on investing in preferred securities. These are a type of hybrid security that combines features of both stocks and bonds. The fund is managed by Nuveen, a leading investment management firm, and is classified as Class I, indicating it is designed for institutional investors. The fund aims to provide a steady stream of income through its investments in preferred securities, which typically offer higher yields than traditional bonds. NPSRX may be a suitable option for investors seeking a balance of income and potential for capital appreciation.