Trader Kevin Lodewick works on the floor of the New York Stock Exchange before the opening bell. World stock markets plunged Monday after China's main index sank 8.5 percent, its biggest drop since the early days of the global financial crisis, amid deepening fears over the health of the world's second-largest economy.

Credit: Richard Drew/AP

US stocks surge to at closing bell

U.S. stocks surged in afternoon trading, putting the stock market on track for its biggest gain in close to four years.



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