Interest Rates: VGSH.MX tracks short-term U.S. Treasury bonds. Rising interest rates typically cause bond prices (and thus VGSH.MX's price) to fall, while falling rates cause prices to rise.

Economic Conditions: Broad economic indicators like inflation, GDP growth, and unemployment can influence investor expectations about future interest rate policy by the Federal Reserve, thereby impacting VGSH.MX's price.

Federal Reserve Policy: Actions and statements by the Federal Reserve regarding monetary policy, especially concerning short-term interest rates, have a direct and immediate effect on the prices of short-term Treasury ETFs like VGSH.MX.

Supply and Demand: General market sentiment towards fixed-income investments affects the supply and demand for VGSH.MX shares. Increased demand drives up the price, while increased supply or selling pressure causes it to fall.

Credit Risk: While U.S. Treasury bonds are considered very low risk, any perceived change in the creditworthiness of the U.S. government could theoretically affect demand, although this is a very rare occurrence.