The T. Rowe Price US Treasury Funds Inc Money Fund (PRTXX) is a mutual fund that primarily invests in short-term US Treasury securities. This fund aims to provide investors with a low-risk investment option that offers stability and liquidity. It is managed by T. Rowe Price, a reputable investment management firm known for its expertise in fixed income investments. PRTXX is a suitable choice for investors seeking a conservative investment option with potential for modest returns.