These mutual funds are designed with a target retirement ... Currently, FFIJX's portfolio features an allocation of roughly 55% in U.S. stocks, 35.6% in international stocks and 9.5% in bonds.

An example is the Fidelity 500 Index Fund, which is the third-largest U.S. mutual fund in terms of net assets. There are more than 2,100 Fidelity funds specializing in U.S. equities, plus hundreds ...