The silhouette of an electric oil pump jack is seen near a flare at night in the oil fields surrounding Midland, Texas, U.S. (Photographer: Luke Sharrett/Bloomberg)

Oil Extends Rally Above $58 as Keystone Outage Cuts U.S. Supply

(Bloomberg) -- Oil extended its rally above $58 a barrel as supply disruptions on the Keystone pipeline added to optimism that the U.S. glut is waning and that OPEC will prolong its output curbs.

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