Interest Rates: GFCXX.US's price is primarily affected by short-term interest rates. When rates rise, the fund's yield and price tend to increase, and vice versa.

Federal Reserve Policy: The Federal Reserve's monetary policy decisions, such as changes to the federal funds rate, significantly impact GFCXX.US as it invests in short-term debt securities.

Credit Risk: Although GFCXX.US invests in high-quality securities, changes in perceived creditworthiness of the issuers can affect its price, even if minimally.

Market Liquidity: The liquidity of the money market impacts GFCXX.US. Higher liquidity typically supports price stability, while lower liquidity can increase volatility.

Economic Conditions: Overall economic health influences interest rate expectations and credit market conditions, thus affecting GFCXX.US's price.

Supply and Demand: Investor demand for money market funds can influence GFCXX.US's price, with increased demand potentially leading to slight price appreciation.

Fund Management: Decisions made by the fund's managers, such as the specific securities chosen and portfolio duration, can influence performance and price.

Regulatory Changes: Changes in regulations governing money market funds can have a significant impact on their operations and, consequently, their prices.