Plug Power (PLUG) fuel cell business surges ahead and is poised for even more success, says Global X's Andrew Little. How Chevron (CVX) has surpassed their initial climate change goals. Why all eyes are on CareDx’s (CDNA) novel DNA treatment for kidney disease -- and more. And why Caterpillar (CAT) is succeeding with autonomous driving even as Tesla fails. The Drill Down with Cory Johnson offers a daily look at the business stories behind stocks on the move.

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