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Two CEOs of exchanges got in a nasty brawl on CNBC's "Power Lunch" over high-frequency trading.  William "Bill" O'Brien, the CEO of BATS, slammed Brad Katsuyama, the CEO and president of IEX, and author Michael Lewis.Katsuyama is the hero in Michael Lewis' new book, "Flash Boys." His firm, IEX, is an alternative exchange. "I've been shaking my head a lot quite frankly the last 36 hours ... Michael and Brad, shame on both of you," he said, adding that they've possibly scared "millions of investors in an effort to promote a business model."CNBC correspondent Bob Pisani asked Katsuyama if he thought the...

CNBC has been a hotbed for commentary - both left and right, from Rick Santelli's call for a tea party on the floor of the Chicago Mercantile Exchange to the hiring of former Democratic Committee Chairman Howard Dean as a CNBC contributor. This time, one of the hosts on CNBC's March 26 "Power Lunch" dropped an expletive during President Barack Obama's online town hall meeting as the network broke away from their coverage: ...more (w/video)...

At the Power Lunch, the Check Is Kryptonite By LAURA M. HOLSON ON a recent Monday night, Christine Peters, a producer of “How to Lose a Guy in 10 Days,” tucked into a corner booth in the Polo Lounge at the Beverly Hills Hotel with a fellow producer and an actress. They chattered about a possible film for an hour or so before Ms. Peters excused herself to go to the ladies’ room. When she returned, she noticed a thin leather case sitting on the table, with the check inside. “Did anybody get this?” she asked. Both women stared blankly,...