Federal Funds Rate: SUTXX's price is heavily influenced by the Federal Funds Rate. Higher rates typically increase yields and net asset value (NAV), while lower rates decrease them.

Treasury Yields: As a government money market fund, SUTXX's price reacts to changes in U.S. Treasury yields. Higher yields mean higher potential returns for the fund, and vice versa.

Demand for Safe Assets: Increased investor demand for safe, liquid assets like government money market funds can drive up the price, and decreased demand can lower it.

Fund Management Fees: The expense ratio and other management fees can impact the overall return and price of SUTXX. Higher fees will reduce the yield.

Economic Conditions: Broader economic conditions, such as inflation and GDP growth, indirectly affect SUTXX's price by influencing interest rate policy and investor sentiment.

Regulatory Changes: Changes in regulations governing money market funds can also impact SUTXX's investment strategy and, consequently, its price.