WASHINGTON (AP) -- US factory activity expanded last month at the fastest pace in 21 2 years, an encouraging sign that manufacturing could lift economic growth and hiring in the coming months.
The Institute for Supply Management, a trade group of purchasing managers, said Tuesday that its manufacturing index rose in September to 56.2, the highest since April 2011. That's up from 55.7 in August and the fourth straight increase in the index. A reading above 50 indicates growth.
Manufacturers added jobs last month at the fastest pace in more than a year and ramped up production, the survey showed. They also received new orders at a healthy pace, though slower than in August.
U.S. factories are showing signs of picking up after slumping earlier this year. A modest recovery in housing and strong auto sales are pushing up demand for steel and other metals, auto parts, furniture and appliances.
Economists said the strong figures suggest that the annual growth rate in the July-September quarter could be healthier than forecasts of about 2 percent. The index has averaged 55.8 in the past three months, up from 50.2 in the April-June quarter.
And the strength at factories has the potential to set the stage for even faster growth in the October-December quarter.
"Another stronger than expected showing," Jim O'Sullivan, chief U.S. economist at High Frequency Economics, said. "The data unambiguously point to a pick-up in the trend in manufacturing output growth."