After two of the most punishing years of his hedge fund life, Pershing Square founder and CEO William Ackman has learned from his trying experiences. “Success is found in how you deal with failure,” he said after attending a Chicago showing of Ted Braun’s film “Betting on Zero.” Along with a packed audience at Chicago’s Facets Cinematheque theater, Ackman said he was done with public short selling, as was the case with his widely watched short on Herbalife, the subject of the film.


