Oil plunges 24% for worst day since 1991, hits multi-year low after OPEC deal failure sparks price war

Oil prices plunged to multi-year lows on Monday as tensions between Russia and Saudi Arabia escalate, sparking fears on the Street that an all-out price war is imminent. The sell-off in crude began last week when OPEC failed to strike a deal with its allies, led by Russia, about oil production cuts. That, in turn, caused Saudi Arabia to slash its oil prices as it reportedly looks to ramp up production U.S. West Texas Intermediate crude and international benchmark Brent crude posted their worst day since 1991. Source CNBC