US Energy stocks fall as oil drops below $91

Energy stocks fell back on Thursday as the Dow Jones Industrial Average DJIA -1.48% dropped more than 100 points. The NYSE Arca Oil Index XX:XOI -2.98% dropped 2.7% to 1,202, wiping out its gain for the year. The NYSE Arca Natural Gas Index XX:XNG -2.26% fell 2.2% to 666. The Philadelphia Oil Service Index OSX -3.23% dropped 3.2% to 253. Crude oil futrues declined 1.1% to $90.95 a barrel. The Dow Jones Industrial Average dropped 143. points. (Market Watch)