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Why oil could fall to $20 a barrel

oil fracking North Dakota
Andrew Cullen | Reuters

A new report from an economic research firm makes a surprising case for crude oil to eventually fall to $20 a barrel over the coming years as technology makes the process of extracting oil from the ground and getting it to the pump as easy as stocking a shelf at Wal-Mart.

The theory is probably not a concern for short-term traders snatching up WTI crude at its current price of about $57—a rise of more than 30 percent from a six-year low—but should be a concern for long-term investors in oil and the related stocks.