Monday's biggest gaining and declining stocks By: MarketWatch September 13, 2010 at 08:49 AM EDT Here's a roundup of stocks expected to move significantly in Monday’s trading, including ArcSight, Dollar Thrifty and Genzyme. Read More >> Related Stocks: Biogen Idec CME Group Hewlett-Packard Intuit Laboratory Corp American Holdings Lam Research PG&E Corp Sanofi-Aventis S.A. ADR Seagen Inc