Morning Movers: Barnes & Noble, Deutsche Boerse

Feb. 25 (Bloomberg) -- Bloomberg's Tom Keene, Sara Eisen and Scarlet Fu highlight the news you need to follow for today's trading. They speak on Bloomberg Television's "Bloomberg Surveillance."

Fed's Yellen: Exploring Factors Affecting Liquidity
17:33 - Federal Reserve Chair Janet Yellen testifies before the Senate Banking Committee. She speaks on "Bloomberg Markets." (Source: Bloomberg)
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