Federal Funds Rate: DTJXX invests in short-term debt, making it sensitive to the Federal Reserve's interest rate policy. Higher rates generally lead to higher yields and potentially a slight increase in price, while lower rates can have the opposite effect. Treasury Yields: As a government money market fund, DTJXX is heavily influenced by the yields on U.S. Treasury securities, particularly short-term Treasury bills. Increases in these yields typically push DTJXX's yield and price slightly higher. Demand for Safe Assets: During times of economic uncertainty or market volatility, demand for safe-haven assets like Treasury bills and money market funds often rises. This increased demand can put upward pressure on DTJXX's price. Fund Expenses: The fund's expense ratio, which covers management fees and operating costs, directly impacts its net yield. Higher expenses can reduce the fund's attractiveness and potentially affect its relative price compared to similar funds.