High Frequency Trading That's Causing Huge Problems

Sept. 27 (Bloomberg) -- Cory Johnson reports on problems associated with high frequency trading. He speaks on Bloomberg Television's "Bloomberg West." (Source: Bloomberg)
Aetna to Buy Humana for $37 Billion
16:52 - Bloomberg's Francine Lacqua and Manus Cranny report on today's "Top Headlines." They speak on Bloomberg Television's "The Pulse." (Source: Bloomberg)
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