Interest Rates: MMTKX.US, a money market fund, is heavily influenced by prevailing interest rates. When interest rates rise, the fund's yield and price tend to increase, and vice versa.

Credit Risk: The creditworthiness of the securities held by MMTKX.US plays a role. Higher credit risk, indicating potential defaults, can negatively impact the fund's price.

Fund Expenses: The expense ratio, which covers the fund's operating costs, directly affects the net return and thus, the attractiveness and relative price of MMTKX.US.

Supply and Demand: Market demand for MMTKX.US can impact its price. Higher demand can lead to increased prices, while increased selling pressure can depress them.

Economic Conditions: Overall economic health, including inflation and unemployment, affects interest rate expectations and influences the attractiveness of money market funds like MMTKX.US.

Regulatory Changes: New regulations impacting money market funds can alter their risk profile and yield, ultimately affecting their price.