Economic Conditions: Broader economic factors like inflation, interest rates, and overall economic growth influence money market fund yields, affecting MMKSX's price.

Interest Rate Changes: MMKSX's price is sensitive to changes in short-term interest rates set by the Federal Reserve. Higher rates generally lead to higher yields and potentially a higher price.

Credit Risk: The creditworthiness of the issuers of the securities held by MMKSX affects investor confidence and the fund's price. Concerns about defaults can lower the price.

Supply and Demand: General investor sentiment and demand for money market funds can drive MMKSX's price up or down. High demand can increase the price.

Fund Management: The expertise and strategy of MMKSX's fund managers in selecting and managing investments contribute to its performance and, consequently, its price.

Liquidity: High liquidity of the underlying assets helps the fund maintains stability. In events where the fund has insufficient liquidity, it may affect the price.

Regulatory changes: Any changes in regulations affecting money market funds can influence investor confidence and affect price of MMKSX.US.