Early movers: JCP, COST, CMI, GRUB, KRFT, YUM By: CNBC.com News October 08, 2014 at 07:48 AM EDT These are the stocks posting the largest moves before the bell. Read More >> Related Stocks: Actavis Plc Applied Materials Costco Wholesale Cummins Grubhub Ord Shs Gsk Plc ADR J C Penney Company Inc Kraft Foods Group Symantec Corp Valeant Pharmaceuticals International, Inc. Yum Brands