A gauge of U.S. manufacturing unexpectedly rose last month to the highest in almost two decades as increased demand prompted more factories to hire than at any time in 31 years, an industry report showed.
The Institute for Supply Management's factory index for May rose to 62.8 from 62.4 for April. A reading greater than 50 signals expansion. The index reached 63.6 in January, the highest since December 1983. Construction spending rose in April for a third month, the Commerce Department reported separately.
Manufacturers are hiring workers and buying new equipment to boost production as sales improve. Inventories ended the first quarter at a record low compared with sales, suggesting factories still need to churn out more products to satisfy demand as it takes longer to fill orders.
``Delivery times are lengthening, and that's a sign that there isn't as much spare capacity as there was,'' said Stuart Hoffman, chief economist at PNC Financial Services Group in Pittsburgh. ``Companies may need to hire more.''
U.S. Treasury notes fell amid worries about inflation and speculation that Federal Reserve policy makers will start raising interest rates at the end of this month. The ISM's measure of prices paid for raw materials such as fuel held close to the highest since November 1979.
The employment index increased to 61.9, the highest since April 1973, from 57.8. The index of supplier deliveries, which measures how long it takes to get materials, rose to 69.4, the highest since April 1979, from 67.1.