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Oil and Gas Stock Roundup: Welcome Back, $50 Oil

newsfeedback@fool.com (Matthew DiLallo)
Oil and Gas Stock Roundup: Welcome Back, $50 Oil

A rebound in the oil market, and some company-specific news items, sent Cobalt International Energy, ConocoPhillips, Chesapeake Energy, Weatherford International, and Seadrill up double-digits this week.