(CNBC) Stocks tumbled more than 2 percent on Thursday, with the Dow on track for the worst day of 2013, dropping over 300 points on a day when Asian and European markets also plunged.
A day after Federal Reserve Chairman Ben Bernanke hinted the central bank may scale back its asset purchases later this year, the world's markets were in turmoil.
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European shares closed deeply in the red across the board with the FTSEurofirst 300 index falling nearly 3 percent. Markets in Asia were slammed, with the Japanese Nikkei closing down nearly 2 percent. South Korea's Kospi and the Shanghai Composite traded near 2013 lows.