US STOCKS-Wall St advances as Yellen keeps Fed policy intact By: Reuters: Company News February 11, 2014 at 12:05 PM EST * Indexes up: Dow 0.85 pct, S&P 0.75 pct, Nasdaq 0.62 pct Read More >> Related Stocks: CVS Health Corp ConAgra Foods Mallinckrodt plc Sentinelone Inc Cl A