ValueWalk On What Might Be Pershing Square's 'Big Secret Short' By: Benzinga via Benzinga February 19, 2015 at 15:53 PM EST ValueWalk’s Jacob Wolinsky published a model analyzing Bill Ackman’s Pershing Square Holdings on Thursday. Using data ... Read More >> Related Stocks: Actavis Plc Best Buy Herbalife Ltd NRG Energy Wal-Mart Stores, Inc. Zoetis