Interest Rates: EJPXX.US, being a money market fund, is heavily influenced by prevailing interest rates. When rates rise, its yield and thus its price generally increase, and vice-versa. Federal Reserve Policy: Actions by the Federal Reserve, such as adjusting the federal funds rate or engaging in quantitative easing, have a direct impact on short-term interest rates, affecting EJPXX.US. Credit Risk: While money market funds aim for safety, the creditworthiness of the underlying securities (e.g., Treasury bills, commercial paper) can affect its value. Higher perceived risk may lower the fund's price. Market Liquidity: The ease with which assets can be bought or sold affects EJPXX.US. Reduced liquidity in money markets may lead to price fluctuations. Fund Management Fees: The expense ratio of EJPXX.US, which covers management fees and operating costs, directly reduces the yield and, consequently, the fund's price.