A broad sell-off in technology companies pulled U.S. stocks sharply lower Monday, knocking off more than 450 points from the Dow Jones Industrial Average. Apple, Amazon and other big names fell. Banks and consumer-focused companies and media and communications stocks also took heavy losses. Crude oil prices were headed higher, snapping a 10-day skid, after Saudi Arabia said it planned to cut its output. KEEPING SCORE: The S&P 500 index dropped 40 points, or 1.5 percent, to 2,740 as of 1:29 p.m.