US STOCKS-Wall St flat after three-day run; Gilead drags By: Reuters: Company News December 22, 2014 at 11:18 AM EST * Indexes: Dow up 0.39 pct, S&P off 0.01 pct, Nasdaq up 0.04 pct Read More >> Related Stocks: AbbVie Achison Inc Caesars Entertainment Inc Express Scripts Holding Gilead Sciences