US STOCKS-Dow, S&P 500 slip with energy, Wal-Mart; Nasdaq gains By: Reuters: Company News February 19, 2015 at 13:32 PM EST * Dow down 0.3 pct, S&P down 0.2 pct, Nasdaq up 0.3 pct (Updates to afternoon trading) Read More >> Related Stocks: ConocoPhillips Exxon Mobil Halliburton Co Marathon Oil The Priceline Group Wal-Mart Stores, Inc.