Interest Rate Changes: When the Federal Reserve raises interest rates, the yields on money market funds like TRSXX.US typically increase, making them more attractive and potentially influencing their price, although money market fund prices remain very stable.

Economic Conditions: A strong economy can lead to higher interest rates and increased demand for money market funds. Conversely, a weak economy can lead to lower interest rates and decreased demand.

Supply and Demand: If demand for TRSXX.US increases while supply remains constant, the price might slightly increase. Conversely, if supply increases while demand remains constant, the price might slightly decrease. These changes are generally small.

Fund Management: The fund's investment strategy and expense ratio can affect its yield, which in turn can affect its attractiveness to investors, indirectly impacting demand.

Regulatory Changes: New regulations regarding money market funds can affect their structure, operations, and yields, potentially influencing their appeal to investors and indirectly impacting demand.