Global stocks tumbled and oil prices collapsed Friday as investors panicked over the expected damage of the coronavirus to global economic growth. Haven investments gold and the yen surged as the World Health Organization (WHO) warned that the epidemic must be taken seriously. At the close of trade, the Paris stock market was down by 4.1 percent, Frankfurt dived 3.4 percent, London shed 3.5 percent and Milan tumbled 3.7 percent ...