Global markets plummeted on Thursday as fears over the coronavirus intensified.<br />A 7% slide after the opening bell on Wall Street triggered a 15-minute suspension of trading.<br />Later, stocks plunged even further to put the Dow Jones on course for its worst day since the 1987 "Black Monday" crash.<br />Major European bourses fell by double-digit percentages for their biggest daily losses on record, led by a 17% slide for Italian stocks.