Groupon Loses Groupies, Investors on the Run

Aug. 20 (Bloomberg) -- Citigroup Global Markets Managing Director Mark Mahaney discusses Groupon's poor performance. He speaks with Cory Johnson on Bloomberg Television's "Bloomberg West." (Source: Bloomberg)

Citi's Levkovich Is Bullish on Financials and Energy
56:21 - In today's "Single Best Chart," Bloomberg's Tom Keene displays the performance of the S&P 500 going back to 1930. He speaks with Tobias Levkovich, chief U.S. equity strategist at Citigroup, on "Bloomberg Surveillance." (Source: Bloomberg)
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