US STOCKS-Wall St falls for 2nd day as materials, tech weigh By: Reuters: Company News January 20, 2011 at 11:12 AM EST * Indexes off: Dow 0.6 pct, S&P 0.8 pct, Nasdaq 1.2 pct Read More >> Related Stocks: Alcoa Exxon Mobil F5 Networks Juniper Networks Standard & Poors 500