US STOCKS-Wall St slips on euro zone, spillover effect feared By: Reuters: Company News May 20, 2011 at 16:29 PM EDT * Dow down 0.7 pct, S&P off 0.8 pct, Nasdaq off 0.7 pct Read More >> Related Stocks: 3M Co Barnes & Noble Caterpillar Chevron Corp Exxon Mobil Gap Standard & Poors 500