SEC investigates Valeant, shares plunge

7:23 AM ET Tue, 1 March 2016

CNBC's Meg Tirrell reports Valeant CEO Michael Pearson returns from medical leave and cancel's the company's fourth quarter report, all this after Valeant reveals it's under investigation by the SEC. Shares dropped by more than 18 percent and some very high profile investors are taking a hit.