U.S. stocks edge higher at open By: MarketWatch February 18, 2010 at 09:57 AM EST U.S. stocks edge higher Thursday morning as weekly jobless claims and January inflation at the wholesale level rise more than expected, but materials sector strengthens. Read More >> Related Stocks: Dow Jones Industrial Average (EOD) DuPont USA Hewlett-Packard Standard & Poors 500 Wal-Mart Stores, Inc.