Zynga, Facebook slide; tech stocks rally By: MarketWatch October 05, 2012 at 10:34 AM EDT Zynga and Facebook fall sharply as investors reacted to Zynga’s drastically reduced outlook. But the tech sector joins a broad rally, lead by chip stocks. Read More >> Related Stocks: Cisco Systems Facebook Hewlett-Packard Intel Corp International Business Machines Micron Technology PHLX Semiconductor Sector Index Texas Instruments Zynga Inc Cl A