Donald Trump Really Doesn't Understand The Economics Of Currency Markets.Then again, I'm not all that sure that Donald Trump understands the economics of anything much other than real estate development. Which isn't, when you come to think of it, all that much of a recommendation for someone who would become the chief executive of the nation. Specifically, here, Trump is getting awfully confused about the economics of currency rates and relative values. He thinks that a declining currency makes a nation richer: not so, entirely the other way around. He also seems to think that changes in currency rates change the number of jobs in a country. Again, not so, they can change the type of jobs but not the number.