WASHINGTON (AP) -- U.S. manufacturers saw orders for their products decline in December by the largest amount in five months although the setback for a key category that tracks business investment was not as large as first reported.
Orders to U.S. factories fell 1.5 percent in December, the biggest drop since July, with much of the weakness coming from a plunge in aircraft orders, the Commerce Department reported Tuesday. Orders had risen 1.5 percent in November after a 0.5 percent October decrease.
Orders in a closely watched category that serves as a proxy for business investment declined 0.6 percent, a smaller fall than the 1.3 percent drop estimated in a preliminary report last week. The decrease followed a sizable 3 percent jump in November, an increase spurred by an expiring tax break.
Demand for durable goods, items expected to last at least three years, fell 4.2 percent, slightly less than the 4.3 percent preliminary estimate. Orders for nondurable goods such as chemicals, paper and food rose 1.1 percent in December following a 0.4 percent November gain.
Analysts say part of the weakness in December reflected a temporary slowdown following a rush to purchase capital goods in November to take advantage of expiring federal tax breaks.
Orders for all of 2013 totaled $5.82 trillion, up 2.5 percent from 2012, as manufacturing continued to recover from the Great Recession.
For December, demand for commercial aircraft, a volatile category, fell 17.5 percent after having risen 21.1 percent in November. While the drop in airplane orders led the declines, there was weakness in a number of categories. Orders for iron and steel fell 10 percent while demand for construction machinery was down 2.9 percent and demand for computers and other electronic products fell 6.3 percent.
The Institute for Supply Management, a trade group of purchasing managers, said Monday that its index of manufacturing activity fell to 51.3 in January from 56.5 in December. It was the lowest reading since May although any reading above 50 signals growth in manufacturing.
The January performance of the ISM index suggests that U.S. manufacturing slowed at the beginning of this year.
Auto sales have decelerated and businesses are spending cautiously on machinery and other large factory goods.
The slowdown could mean that economic growth in the first three months of this year will get less support from manufacturing.
But some economists said that the weak ISM reading may reflect unusually bad weather in January.
The Federal Reserve reported that factory output in December rose for a fifth straight month. Manufacturers produced more cars, trucks and appliances in December.