Einhorn: I'm adding to 'bubble' shorts like Amazon By: CNBC.com News November 05, 2014 at 12:44 PM EST Greenlight Capital founder David Einhorn is tweaking his bets after losing money in a "frustrating" third quarter. Read More >> Related Stocks: Amazon.com CONSOL Energy EMC Corp Keurig Green Mountain Lululemon Athletica Mallinckrodt plc Under Armour United States Steel Corp