A Fund Supermarket is a relatively new concept, a fund supermarket is an investment firm (often called a family) which offers not only its own mutual funds, but the ability to invest in the mutual funds of other families. The nice thing about this is that all of your investments in these funds would be displayed on one statement from your primary family. On the down side, sometimes supermarkets will tack on additional charges for investing in funds outside the family if that fund doesn’t separately pay a commission.