Stocks Flat After Philly Fed Survey; FB Below $20 By: CNBC.com News August 16, 2012 at 10:14 AM EDT Stocks hovered around the flatline Thursday, following a batch of weaker-than-expected economic reports and as optimism for further Fed action diminished. Read More >> Related Stocks: Cisco Systems Electronic Arts Facebook GX Defense Tech ETF Gap Groupon Cl A Marvell Technology Inc Wal-Mart Stores, Inc. Zynga Inc Cl A