US STOCKS-Wall St down as Portugal weighs ahead of earnings By: Reuters: Company News January 10, 2011 at 11:41 AM EST * Indexes off: Dow 0.6 pct, S&P 0.5 pct, Nasdaq 0.6 pct Read More >> Related Stocks: Alcoa DuPont USA Ducommun Inc General Electric Standard & Poors 500 Strayer Education