Stephen Roach, Columnist

How the Coming Crash in the Dollar Will Unfold

The argument that there is no alternative to the U.S. currency makes little sense. 

The dollar’s supremacy is threatened.

Photographer: China Photos/Getty Images

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Scorn has long been heaped on those daring to question the supremacy of the U.S. dollar as the world’s dominant reserve currency. I certainly received more than my fair share in reaction to a column I recently wrote for Bloomberg Opinion on the likelihood of a sharp decline in the greenback. The counter-arguments were strong and highly political, basically boiling down to the so-called TINA defense – that when it comes to the dollar, “there is no alternative.”

That argument is very important in one critical sense: The dollar, like any foreign-exchange rate, is a relative price. As such, it encapsulates a broad constellation of a nation’s value proposition — economic, financial, social, and political — as viewed against comparable characterizations of other nations. It follows that shifts in foreign-exchange rates capture changes in these relative comparisons — the U.S. versus Europe, the U.S. versus Japan, the U.S. versus China, and so on.