Oil falls for fourth week; US crude posts steepest weekly loss since 1991

NEW YORK (Reuters) - U.S. crude tumbled 10.7% on Friday and posted its biggest weekly decline since the 1991 Gulf War as the coronavirus epidemic dried up global demand and as officials in Washington said an envoy would head to Saudi Arabia to deal with fallout of a Saudi-Russia oil price war.The week featured four days of massive selling as the growing pandemic kept people from driving and booking flights. Major forecasters like trading giant Vitol and energy researcher IHS Markit said oil..