US stock indices plummet amid China worries

Our live blog is tracking a global market sell-off following a 7 percent drop in Chinese shares overnight. It triggered newly-introduced circuit breaker, halting trade in Chinese shares for the second time this week.

U.S. stocks traded sharply lower following the news but pared earlier losses after the China Securities Regulatory Commission suspended its circuit breaker system. Stocks took another leg down after a report that China wants a quick, sharp currency decline.

We'll bring you the latest developments below.

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