Stocks were essentially flat at today's open on the heels of yesterday’s huge rally. The Dow inched down 15 points, while the Nasdaq and S&P fell 0.5% and 0.3%, respectively. Commodity prices were backing off, though oil still hovered around $68 a barrel. Financials were mixed, with Barclays down 12% in US trading after Abu Dhabi’s International Petroleum Investment Co, announced it would sell more than a billion shares. (More stock market stories.)