U.S.: What If The Greenback Suddenly Gets Sick?

It's strong now, but increasingly vulnerable. And that carries big risks

Treasury Secretary Lawrence H. Summers has taken on a tricky balancing act: The U.S. decided to assist other governments in the Sept. 22 currency-market intervention aimed at propping up the euro at the cost of a weaker dollar. But at the same time, Summers must continue to assure foreign investors that the U.S. remains committed to a strong greenback.

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