Interest Rates: Changes in prevailing interest rates directly impact the yield, and therefore the price, of MVVXX. Higher rates generally increase yield and price, while lower rates decrease them.

Credit Risk: The creditworthiness of the securities held within the fund's portfolio influences its price. Concerns about issuers defaulting could lower the fund's value.

Maturity: MVVXX invests in short-term securities. Changes in the weighted average maturity of its holdings can slightly affect price sensitivity to interest rate fluctuations.

Supply and Demand: Market demand for money market funds relative to the supply of MVVXX shares can create small price variations.

Fund Management Fees: The fund's expense ratio, representing management fees, can affect the net yield and therefore the attractiveness and price of MVVXX.

Economic Conditions: Broader economic factors, such as inflation expectations and overall market sentiment, can indirectly influence investor demand for money market funds like MVVXX, impacting its price.