ECONOMY

Survey: Growth in US manufacturing drops again in August, slips to lowest level since May 2013

FILE - In this July 1, 2015 file photo, Elder Brandao, working under ultraviolet lights, glues an outsole to a midsole of the New Balance proposed 950v2 sneaker, that has passed military testing, at one of company's manufacturing facilities in Boston. The Institute for Supply Management, a trade group of purchasing managers, issues its index of manufacturing activity for August on Tuesday, Sept. 1, 2015. (AP Photo/Stephan Savoia, File)

FILE - In this July 1, 2015 file photo, Elder Brandao, working under ultraviolet lights, glues an outsole to a midsole of the New Balance proposed 950v2 sneaker, that has passed military testing, at one of company's manufacturing facilities in Boston. The Institute for Supply Management, a trade group of purchasing managers, issues its index of manufacturing activity for August on Tuesday, Sept. 1, 2015. (AP Photo/Stephan Savoia, File)  (The Associated Press)

A private survey finds that growth in US manufacturing slowed last month to the lowest pace in more than two years.

The Institute for Supply Management, a trade group for purchasing managers, reported Tuesday that its manufacturing index slid to 51.1 last month from 52.7 in July. It was the second straight drop, and marked the weakest reading since May 2013. Anything above 50 signals growth. Economists had expected the index to rise last month.

Raw materials prices fell for the 10th straight month. Growth fell in production, employment and exports.

The strong dollar has made U.S. goods more expensive in foreign markets. China's economic slowdown has also pinched manufacturers and pushed commodities prices lower.