Federal Funds Rate: The Federal Reserve's monetary policy directly impacts short-term interest rates, influencing TOCXX's yield and price.

Treasury Bill Yields: TOCXX invests in short-term Treasury securities, so changes in Treasury bill yields affect its overall return.

Demand for Safe Assets: Increased demand for safe assets like Treasury bills can drive up their prices and lower yields, potentially affecting TOCXX's price.

Overall Market Liquidity: General liquidity conditions in the market can influence demand for money market funds, impacting TOCXX's price.

Expense Ratio: The fund's expense ratio directly impacts the net return to investors, affecting its attractiveness relative to other options.

Credit Risk: Although TOCXX primarily invests in U.S. government securities, perceived credit risk in the broader market can influence investor demand.

Inflation Expectations: Expectations about future inflation can affect interest rates, and therefore, the yield and price of TOCXX.

Economic Growth: Stronger economic growth often leads to higher interest rates, which could impact TOCXX's performance.