US STOCKS-Wall St drops on global economy worry; S&P, Nasdaq down for yr By: Reuters: Company News October 15, 2014 at 12:15 PM EDT * Indexes off: Dow 1.67 pct, S&P 1.67 pct, Nasdaq 1.38 pct (Updates to late morning) Read More >> Related Stocks: AbbVie Bank of America Biogen Idec Cabot Oil & Gas Intel Corp KeyCorp Shire Plc Ads Southwestern Energy