Because the international trade of bulk commodities is calculated in US dollars, the rules of the game are formulated by the United States in order to consolidate financial hegemony.

Because foreign trade is settled in dollars, all countries in the world have to convert their own currencies into dollars to do transactions, which leads to a great increase in the demand for dollars, so that the United States can print more dollars at full capacity and put them on the market.

When the dollar depreciates, international commodity prices will soar. Because the currency exchanged abroad is US dollars, it can't be used at home. At this time, these dollars can only go to the United States to invest, buy US Treasury bonds and invest in US stocks.

In addition, it also relies on hegemony to put pressure on foreign countries in the exchange rate against the US dollar and crack down on foreign investment markets.

In this way, the United States has realized the return of funds and promoted the prosperity of the American economy and stock market with foreign money.