[Interest Rates]: Changes in interest rates, particularly the federal funds rate, directly impact money market fund yields and therefore their prices. Higher rates generally lead to higher yields and potentially increased fund value.

[Credit Risk]: The creditworthiness of the securities held within the fund (e.g., commercial paper, Treasury bills) affects the fund's perceived safety and yield. Downgrades can lead to price declines.

[Maturity of Holdings]: The average maturity of the fund's investments influences its sensitivity to interest rate changes. Longer maturities make the fund more vulnerable to rate fluctuations.

[Supply and Demand]: Market demand for money market funds can impact their prices. High demand can drive up prices, while redemptions can put downward pressure.

[Economic Conditions]: Overall economic health and outlook influence interest rates and credit risk, indirectly affecting money market fund values.

[Inflation Expectations]: Anticipated inflation levels influence interest rates and therefore affect money market yields and prices.

[Regulatory Changes]: Government regulations and policies related to money market funds can impact their operations, attractiveness, and ultimately their prices.