CNBC | Oil prices tumble as traders reassess Canada wildfire impact CNBC Oil prices fell more than 3 percent on Monday as traders assessed the impact of wildfires on Canada's oil output and after another reported inventory build at the U.S. hub for crude futures. The market rallied 2 percent earlier in the session as ... Oil prices volatile as Canadian wildfires overshadow Saudi change Saudi Minister Has Task of Easing Dependence on Oil Oil Prices Give Back Gains as Canada Fire Threat Weakens |