Stocks edge higher at open By: MarketWatch June 22, 2010 at 10:00 AM EDT U.S. stocks edge up Tuesday, even as worries grew over the European banking system. Consumer discretionary and technology stocks strengthened. Read More >> Related Stocks: Chevron Corp Cisco Systems Dow Jones Industrial Average (EOD) Exxon Mobil Hewlett-Packard Johnson & Johnson Microsoft Standard & Poors 500 Walgreen Company