Stocks Rise After Jobs Report; Zynga Skids 20% By: CNBC.com News October 05, 2012 at 10:04 AM EDT Stocks opened higher Friday, with the S&P 500 looking to log its fifth-straight rally, as Wall Street cheered a surprise decline in the unemployment rate. Read More >> Related Stocks: Alcoa Avon Products Hewlett-Packard Home Depot Zynga Inc Cl A