A short quote from Rothbard…
Myth 4: A major cause of the crash was the big trade deficit in the U.S.
Nonsense. There is nothing wrong with a trade deficit. In fact, there is no payment deficit at all. If U.S. imports are greater than exports, they must be paid for somehow, and the way they are paid is that foreigners invest in dollars, so that there is a capital inflow into the U.S. In that way, a big trade deficit results in a zero payment deficit.
Foreigners had been investing heavily in dollars–in Treasury deficits, in real estate, factories, etc.–for several years, and that’s a good thing, since it enables Americans to enjoy a higher-valued dollar (and consequently cheaper imports) than would otherwise be the case.
But, say the advocates of Myth 4, the terrible thing is that the U.S. has, in recent years, become a debtor instead of a creditor nation. So what’s wrong with that? The United States was in the same way a debtor nation from the beginning of the republic until World War I, and this was accompanied by the largest rate of economic and industrial growth and of rising living standards, in the history of mankind.