> The US economy depends on the country's position of world hegemon

Citation needed? This feels like a retcon. Remember that the U.S. became the biggest economy in the world in 1890: https://www.digitalhistory.uh.edu/disp_textbook.cfm?smtid=2&.... That was half a century before World War II and the military empire that followed.

The trillion dollars a year pumped into the military support the stock prices of quite a few highly-valued companies. A sudden collapse of hegemony would be bad for "the market", but that seems unlikely unless WW3 actually kicks off instead of a few more rounds of opportunistic snatching and bullying by the big countries, and in that case few people would care about the stock market.