Mutual funds definition A mutual fund is a professionally managed investment fund that pools money from many investors to purchase securities. A Mutual fund has a number of investors with one common investment objective (which is to make money that is). This money is then invested into bonds, equities and other securities, the income that is generated is then distributed proportionately amongst investors A better understanding functions Raises money by selling its own shares to investors to pool money to purchase a portfolio of stocks, bonds. This is the end