Groupon, Juniper, Zynga lift tech stocks By: MarketWatch May 15, 2012 at 11:03 AM EDT Gains in shares of Groupon, Juniper Networks, Zynga and Amazon.com lift tech stocks early Tuesday. Read More >> Related Stocks: Amazon.com Cisco Systems Facebook Groupon Cl A Hewlett-Packard Juniper Networks Yahoo Zynga Inc Cl A