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Red flags at Green Mountain?

Wednesday, 7 Aug 2013 | 12:41 PM ET

CNBC's Herb Greenberg and traders Jon and Pete Najarian debate one of the best-performing stocks this year, Green Mountain. CNBC's Josh Lipton reports on Amgen and Onyx. And shares of Tesla have been in overdrive, up 300 percent this year. Is it time to tap the breaks on Tesla? Dan Galves, Deutsche Bank, weighs in.