FAPFX is a mutual fund offered by Fidelity Investments that focuses on providing sustainable income with a low duration. This means that the fund invests in fixed-income securities with shorter maturities, reducing the risk of interest rate fluctuations. The fund also follows socially responsible investing principles, considering environmental, social, and governance factors in its investment decisions. FAPFX aims to provide investors with a steady stream of income while promoting sustainable practices.