A closed-end fund, also known as an investment trust, is a company that issues a set number of securities. These securities are then traded on a stock exchange or in the over-the-counter market. The assets of a closed-end fund are managed by professionals, following the fund's investment objective and policies. This allows for a diverse range of financial instruments and assets to be invested in. Similar to other publicly traded securities, the market price of closed-end fund securities is subject to change based on supply and demand in the marketplace.