Home Business Oil prices plunge by a third after Saudi Arabia launches output war Business Oil prices plunge by a third after Saudi Arabia launches output war By Genpie - March 9, 2020 114 0 Facebook Twitter Google+ Pinterest WhatsApp Oil prices lost as much as a third of their value on Monday in their biggest daily rout since the 1991 Gulf War after Saudi Arabia signalled it would hike output to win market share when the coronavirus has already left the market oversupplied.