Introducing Fracklog, the New-Fangled Oil Storage System: Energy

Photographer: Ty Wright/Bloomberg
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Oil drillers expecting prices to rebound after the biggest drop in six years have come up with an alternative to storing their crude in tanks: They’re keeping it in the ground.

It’s a new twist on an old oil-trading technique, known as a contango storage play, in which a trader buys cheap crude in an oversupplied market and saves it to lock in profits at higher future prices. Drillers who have spent millions boring holes through petroleum-rich shale rock are just waitingBloomberg Terminal for prices to go up before turning on the spigot.