( Foxbusiness ) - Oil and gas stocks marched higher Friday, in step with a 150-point gain on the Dow Jones Industrials and a 70-cent uptick in crude-oil prices. Opening trades sent the Amex Oil Index 1.2% higher to 1,526 points while the Amex Natural Gas Index rose 0.7% at 573 points and the Philadelphia Oil Service Index added 1.4% to 295. Hess Corp. led percentage gainers in the Amex Oil Index, up 4% as it bounced back from Thursday's Citigroup downgrade. Crude for February delivery was last trading 67 cents higher at $91.73 a barrel in thin volume.