Billionaires Make the Case For: GM, AMZN, HCA, BAX, VRX and Activism

Last week we heard from three top billionaire investors, publicly, and for different reasons. In all cases, they gave us some valuable nuggets.On Friday, Bill Ackman held a conference call defending his multi-billion dollar position inValeant( VRX ). In the face of the scrutiny, he predicted Valeant shares