A dump truck works near the Syncrude oilsands extraction facility near the city of Fort McMurray, Alta., on June 1, 2014. Photo by THE CANADIAN PRESS/Jason Franson

Canadian crude prices have fallen to their weakest relative to the U.S. benchmark since March as surging production from Alberta meets an already well-supplied world market.

Heavy Western Canadian Select, traded in Alberta for January, fell to US$13 below West Texas Intermediate on Tuesday, according to data from brokerage Modern Commodities. That’s the biggest discount since March, when the Trump administration briefly imposed 10 per cent tariffs on Canadian oil.

On the U.S. Gulf Coast, Canadian heavy crude for January is trading US$4.55 shy of WTI, the widest discount since January, according to Link Data Services.

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