FFFX is a mutual fund offered by Fidelity Investments that is designed for investors with a target retirement date of 2040. This fund aims to provide a diversified portfolio of stocks, bonds, and other assets to help investors reach their retirement goals. FFFFX offers a mix of growth and income investments, with a gradually decreasing allocation to stocks as the target date approaches. This fund is suitable for investors with a moderate risk tolerance and a long-term investment horizon.