Morning Movers: Halliburton, Best Buy, Garmin

Feb. 20 (Bloomberg) -- Bloomberg's Tom Keene, Sara Eisen and Alix Steel highlight the news you need to follow for today's trading. They speak on Bloomberg Television's "Bloomberg Surveillance."

Yellen: Prudent to Adjust Policy Gradually Over Time
36:16 - Federal Reserve Chair Janet Yellen speaks about the state of the U.S. economy during a speech at the Stanford Institute for Economic Policy Research in California. (Source: Bloomberg)
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