One U.S. dollar today is worth about 9.92 Chinese yuan. That’s down nearly 10 percent from where it was last spring. That drop has the attention of Treasury Secretary Steven Mnuchin, who said Wednesday he wants to make sure China is not doing “competitive devaluations.” That’s when a country seeks an advantage by making its currency, and therefore its goods, cheaper relative to other countries. But the cheap yuan might have more to do with what’s going on in the United States than it does with China.

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