All 10 major S&P sectors were in the red and all 30 Dow components lower. The beaten-down energy sector’s 4.43 percent slide led the declines, as oil prices fell 6.5 percent. At 13:01 p.m. ET (1801 GMT), the Dow Jones industrial average was down 448.5 points, or 2.74 percent, at 15,930.55.