The single most astonishing fact about foreign exchange is not the high volume of transactions, as incredible as that growth has been. Nor is it the volatility of currency rates, as wild as the markets are these days. Instead, it's the extent to which the market remains dollar-centric.The greenback, in other words, is not just America's currency. It's the world's. But as astonishing as that is, what may be even more astonishing is this: The dollar's reign is coming to an end. I believe that over the next 10 years, we're going to see a profound shift toward a world in which several currencies compete for dominance.
The impact of such a shift will be equally profound, with implications for, among other things, the stability of exchange rates, the stability of financial markets, the ease with which the U.S. will be able to finance budget and current-account deficits, and whether the Fed can follow a policy of benign neglect toward the dollar.
But just because this has been true in the past doesn't guarantee that it will be true in the future. In fact, all three pillars supporting the dollar's international dominance are eroding.
Now, however, nearly everyone carries hand-held devices that can be used to compare prices in different currencies in real time. Just as we have learned that in a world of open networks there is room for more than one operating system for personal computers, there is room in the global economic and financial system for more than one international currency.
Second, the dollar is about to have real rivals in the international sphere for the first time in 50 years. There will soon be two viable alternatives, in the form of the euro and China's yuan.
But now, mainly as a result of the financial crisis, federal debt is approaching 75% of U.S. gross domestic product. Trillion-dollar deficits stretch as far as the eye can see. And as the burden of debt service grows heavier, questions will be asked about whether the U.S. intends to maintain the value of its debts or might resort to inflating them away. Foreign investors will be reluctant to put all their eggs in the dollar basket. At a minimum, the dollar will have to share its safe-haven status with other currencies.
