The stock market cratered again on Friday, marking the seventh day of a massive sell-off sparked by rising fears about the coronavirus epidemic. The Dow Jones Industrial Average plunged by 800 points at the opening bell, with the S&P 500 and the Nasdaq each falling by 3 percent.

The sell-off comes as traders abandon any hope that the spread of the highly infectious disease has been staunched, with the number of cases continuing to spiral globally.