Tuesday's biggest gaining and declining stocks By: MarketWatch July 13, 2010 at 08:46 AM EDT NEW YORK (MarketWatch) -- Stocks expected to move significantly in trading on Tuesday include Alcoa, Amedisys, CommVault, Fastenal, MBIA and Vivus: Read More >> Related Stocks: Alcoa Amedisys Inc Commvault Systems Fastenal Co MBIA Inc Tower Semiconductor Vivus Inc