The market overreacts to bad news. So Buffett bought American Express during a scandal, which (he checked) didn't actually affect their business. For the USA,

The market overreacts to bad news. So Buffett bought American Express during a scandal, which (he checked) didn't actually affect their business. For the USA, business is affected, the question is if it's long term: Will closed businesses reopen? Will unemployed find work? Will the US lose its centrality to China? But however bad it is, the market overreacts.