The Nuveen Municipal Credit Opportunities Fund (NMCO) is a mutual fund that focuses on investing in municipal bonds. These bonds are issued by state and local governments to fund public projects such as schools, roads, and hospitals. The fund aims to provide investors with a steady stream of tax-free income while also seeking to preserve capital. It may also invest in other fixed-income securities, such as corporate bonds, to diversify its portfolio. With a focus on credit opportunities, the fund may also actively manage its holdings to take advantage of market conditions and potentially generate higher returns. Overall, NMCO offers investors the potential for tax-free income and capital preservation through a diversified portfolio of municipal and other fixed-income securities.