China's currency devaluation ripped global risk markets, but the real fear is that what's behind the move could be a bigger problem for the world economy.
Global stock markets fell and commodities were crushed. Emerging market equities were casualties, and currencies from the Mexican peso to the Australian dollar were smacked. The U.S. dollar was higher against a basket of currencies, and buyers moved into the safety of bunds and Treasurys, driving yields sharply lower. The U.S. 10-year was yielding 2.13 percent.
"It's a little bit of damage to the global growth psychology. If the country that's been growing the fastest and been one of the mainstays of global growth momentum ... is allowing their currency to sink a little bit, if they're resorting to that, how bad are things around the world?" said Robert Sinche, chief global strategist at Amherst Pierpont Securities.