The Dow Jones Industrial Average turned slightly higher in morning trade Friday after giving back nearly all of a 1.3% intraday gain Thursday. Sellers hit technology stocks this morning, but the Nasdaq composite pared losses. X Early gainers in the Dow Jones today included Walmart (WMT). WMT stock is trading near its all-time high ahead of next week's earnings report. It's a busy week of retail earnings, with names like Home Depot (HD), Target (TGT), TJX Cos. (TJX) and Ross Stores (ROST) set to report. Merck (MRK) and UnitedHealth Group (UNH) also outperformed in the Dow Jones index during the…