Costolo Has Done a Great Job at Twitter: Sarver

Feb. 6 -- Redpoint Ventures' Ryan Sarver discusses Twitter's fourth-quarter performance with Bloomberg's Cory Johnson on "Bloomberg West."

Oil Holds Gains as U.S. Drilling Slows
43:53 - Independent Energy Analyst and Economist Anas Alhajji discusses the price and production of oil. He speaks on "Bloomberg Markets: Middle East." (Source: Bloomberg)
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