Far more individuals are invested in the stock market through mutual funds than in the past. This phenomenon is due in part to the creation of many forms of tax deferred retirement savings programs such as IRAs, Roth IRAs, company sponsored 401(k) and 403(b) plans. But mutual funds also benefit from the long-standing belief that they allow investors to diversify their holdings without buying individual stocks. From a planning viewpoint, here are some great mutual fund tips. These tips assume your mutual fund investment is NOT in a retirement account unless noted.