Thursday’s biggest gaining and declining stocks By: MarketWatch October 25, 2012 at 07:06 AM EDT Zynga was pushing higher in premarket trade Thursday, while F5 Networks was sharply off. Among the top trending tickers, were Apple and Amazon. Read More >> Related Stocks: Amazon.com Apple F5 Networks Logitech Int S.A. Symantec Corp Zynga Inc Cl A