In the past few years, the U.S. current account deficit has shrunk from over 6% of GDP in mid-2006 to less than 3% today. Since these current account deficits reflect capital account surpluses, many people view them as a symptom of the problems that led to the crisis. That is, funds from abroad were fueling the credit boom in the United States, which in turn fed the boom in housing prices, etc.
Over the past three decades the U.S current account has been in surplus only briefly in the first half of 1990. Since then, it has been continuously in deficit. How is it that the United States can keep borrowing without a collapse in the currency or a surge in borrowing costs? Is there some sort of limit?
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