US STOCKS-Wall St ends lower as biotechs fall; indexes up for week By: Reuters: Company News March 21, 2014 at 16:54 PM EDT * Dow off 0.2 pct; S&P 500 down 0.3 pct; Nasdaq off 1 pct (Updates to close) Read More >> Related Stocks: Biogen Idec Darden Restaurants First Solar Gilead Sciences Nike Inc Symantec Corp Tiffany & Co Zions Bancorp