"You can take some encouragement from this but it's probably not as strong as the headline number suggests," said Millan Mulraine, a senior U.S. strategist at TD Securities in New York.
Also Friday, the Labor Department said consumer prices in the world's biggest economy rose more than expected in August, as gasoline prices soared by 9%. U.S. CPI jumped 0.6%, while there was no change in the prior month. Analysts had expected U.S. inflation rate to accelerate to 0.5% last month.