This Oil Sands Deal Soured in Less Than 3 Months

One of these companies agreed to buy $13.3 billion worth of oil-sands assets in March, and one agreed to sell:I...

Oil Sands Batter Major Explorers’ Reserves as Rout Sinks Value

Oil-sands investments in Western Canada that gobbled tens of billions of dollars over the past decade are proving an Achilles heel for some of the world’s biggest energy producers.