The Fidelity Series Treasury Bill Index Fund (FHQFX) is a mutual fund that seeks to track the performance of the U.S. Treasury Bill market. This fund is managed by Fidelity Investments and primarily invests in short-term, high-quality government debt securities. It is designed to provide investors with a low-risk, stable investment option with potential for modest returns. The ticker symbol for this fund is FHQFX.