Stocks sold off Friday after new federal data showed prices rising faster than expected, reigniting inflation fears on Wall Street.

The Dow Jones Industrial Average was down more than 630 points shortly after 12:30 p.m. EDT, a loss of 1.5 percent. The Nasdaq composite was down 2.4 percent and the S&P 500 index was down 1.8 percent.

The stock slide began shortly after the Commerce Department released data showing an unexpectedly steep increase in........

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