Obama's Commerce Choice, Armstrong May Talk Doping

Feb. 7 (Bloomberg) -- Bloomberg's Sara Eisen reports on today's "Top Headlines." She speaks on Bloomberg Television's "Bloomberg Surveillance."
What Investors Don't Like About Twitter's Earnings
47:26 - Estimize CEO Leigh Drogen, Raymond James' Aaron Kessler and Bloomberg Intelligence's Paul Sweeney discuss Twitter's revised full-year forecast with Bloomberg's Matt Miller on "Street Smart." (Source: Bloomberg)
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