Crude prices drop after Angola quits OPEC
Key figures around 1630 GMT West Texas Intermediate: DOWN 0.6 percent at $73.78 per barrel Brent North Sea crude: DOWN 0.5 percent at $79.29 per barrel New York - Dow: UP 0.7 percent at 37,325.53 points London - FTSE 100: DOWN 0.3 percent at