Fund Type: FUGXX.US is likely a money market fund.

Interest Rates: Money market fund yields, and thus prices, are very sensitive to changes in short-term interest rates. Higher rates generally lead to higher yields and vice versa.

Federal Reserve Policy: The Federal Reserve's monetary policy decisions, especially regarding the federal funds rate, directly impact money market fund yields.

Credit Risk: Although money market funds primarily invest in high-quality, short-term debt, the creditworthiness of the underlying securities still influences the fund's price. Defaults or downgrades can negatively affect it.

Maturity of Holdings: The average maturity of the fund's holdings impacts its sensitivity to interest rate changes. Longer maturities typically mean greater price volatility.

Supply and Demand: Investor demand for money market funds can influence their net asset value (NAV). Increased demand can push prices slightly higher.

Fund Expenses: Management fees and other expenses charged by the fund reduce the yield and can affect the fund's overall return, impacting price.

Economic Conditions: Overall economic health affects interest rate expectations and the perceived risk of underlying investments, indirectly influencing the fund's price.