Economy: Broader economic conditions such as inflation, interest rates, and economic growth influence the attractiveness of money market funds like MIFXX.

Interest Rates: Changes in prevailing interest rates directly impact the yield and attractiveness of money market funds, affecting their price.

Federal Reserve Policy: Actions by the Federal Reserve, particularly adjustments to the federal funds rate, have a significant impact on money market fund yields.

Credit Risk: Perceived creditworthiness of the issuers of securities held by the fund can affect its price; higher risk leads to lower prices.

Fund Management: Decisions made by the fund's managers, such as security selection and maturity allocation, can influence its performance.

Supply and Demand: The balance between investors buying and selling shares of MIFXX affects its market price.

Inflation Expectations: Anticipated changes in inflation influence interest rates and consequently affect money market fund yields.

Regulatory Changes: New regulations governing money market funds can impact their structure, operations, and ultimately, their price.