According to the requirements of the Federal Reserve, all financial institutions in the United States that absorb depositors' deposits have their own reserve accounts in the Federal Reserve. This account is mainly to meet the potential sudden withdrawal needs of depositors. The Federal Reserve will set the deposit reserve ratio, and the amount in the reserve account of financial institutions shall not be lower than this figure.

The dollar is the international currency issued by the United States, and all the circulating dollars come from the Federal Reserve.

Because the previous loan policy close to zero interest rate attracted a large number of investors to borrow money in the United States and make overseas investments, such as in China and so on. After raising interest rates, the cost of capitalist loans increased. At this time, the economies of China and other emerging market countries went down, and the return on loan investment became lower, which inevitably led to the decline in loan investment and the withdrawal of funds.