After the midday rebound lost steam, stocks have been on a downhill slide, with the Dow and S&P retouching session lows from this morning. Basic materials and energy are dragging. With an hour left, the Dow -1.2% to 10,265; S&P 500 -1.2% to 1,090; Nasdaq -0.8% to 2,172. Crude -1.6%. Gold -2.5%.