MMRUX.US, a money market fund, primarily aims to maintain a stable $1 share price, but slight fluctuations can occur. Interest Rates: Rising interest rates generally lead to higher yields and potentially slightly increased share prices as fund holdings mature and are reinvested at the new, higher rates.

Credit Risk: If the fund holds securities that experience downgrades or defaults, the share price could be negatively affected, although money market funds are typically very conservatively invested.

Fund Expenses: Higher expense ratios reduce the overall return to investors, potentially impacting demand and subtly influencing the share price compared to similar, lower-cost funds.

Supply and Demand: While designed to be stable, unusually high redemption requests could temporarily exert downward pressure on the share price, requiring the fund to sell assets to meet those requests.

Economic Conditions: Broader economic uncertainty can indirectly affect money market funds, as investors may shift assets causing minor price variations due to changes in demand.