Cobalt slips deeper into red on Shenandoah impairment

American oil company Cobalt International Energy sank deeper into the red during the first quarter of this year due to an impairment related to the Anadarko-operated Shenandoah discovery in the Gulf of Mexico in which Cobalt owns a 20% working interest.  The oil company on Monday posted a net loss of $306.3 million for the first quarter […]

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