U.S. equity markets plunged Wednesday, pushing the Dow Jones Industrial Average briefly below 20,000.
The blue-chip index fell by about 1,300 points, or 6 percent, while the S&P 500 and Nasdaq Composite were lower by 5.4 percent and 5.5 percent, respectively. Trading is halted if the S&P 500 falls by 7 percent.-- More...