UPDATE 1-MOVES-Pershing Square's Valeant analyst to exit, Ackman sees stock rising
August 26, 2016 at 19:22 PM EDT
BOSTON, Aug 26 (Reuters) - Billionaire investor William Ackman said on Friday that Jordan Rubin, who had worked closely on Pershing Square Capital Management's controversial investment in battered drug maker Valeant Pharmaceuticals, is leaving the hedge fund.