Stocks opened near the unchanged mark on Thursday, as investors sorted through a handful of earnings reports from Ciena Corp. and others, and naggingly high oil prices kept Wall Street on edge. The Dow Jones industrial average <.DJI> was down 11.64 points, or 0.12 percent, at 9,926.07. The Standard & Poor's 500 Index <.SPX> was down 0.46 points, or 0.04 percent, at 1,088.22. The technology-laced Nasdaq Composite Index <.IXIC> was up 0.86 points, or 0.05 percent, at 1,899.03.///