US manufacturing contracted for a third straight month in May, based on survey data. The ISM Manufacturing Index edged lower last month to a six-month low of 48.5, moderately below the neutral 50 mark that separates growth from contraction. “The outlook for the manufacturing sector looks downbeat, particularly with the initial surge in demand from front-loading now behind us,” said Matthew Martin, senior economist at Oxford Economics. “Businesses are contending with higher input costs, supply disruptions, and domestic and foreign customers wary of committing to new orders.”