A mutual fund is a professionally managed type of collective investment scheme that pools money from many investors and invests typically in investment securities (stocks, bonds, short-term money market instruments, other mutual funds, other securities, and/or commodities.

The mutual fund will have a fund manager that trades (buys and sells) the fund's investments in accordance with the fund's investment objective An open-ended fund operated by an investment company which raises money from shareholders and invests in a group of assets, in accordance with a stated set of objectives. mutual funds raise money by selling shares of the fund to the public, much like any other type of company can sell stock in itself to the public.

Mutual funds then take the money they receive from the sale of their shares (along with any money made from previous investments) and use it to purchase various investment vehicles, such as stocks, bonds and money market instruments. In return for the money they give to the fund when purchasing shares, shareholders receive an equity position in the fund and, in effect, in each of its underlying securities.

For most mutual funds, shareholders are free to sell their shares at any time, although the price of a share in a mutual fund will fluctuate daily, depending upon the performance of the securities held by the fund.