http://www.newsweek.com/id/220936 This article explains it easy for the Joe the Plumber. Lots of US companies are selling things to foreign markets made in those markets. And Companies know no borders, if the US dollar collapses, equity is still a better deal especially as the rest of the world moves on without us. So if the US collapses, Coke,GE,PG HQ's will just shift somewhere else. Just make sure to fill your suitcases with share certificates before you board that plane with the one way ticket out of the US.