Construction input prices fell for the fifth consecutive month in November, according to a recent analysis of the Bureau of Labor Statistics’ Producer Price Index done by the Associated Builders and Contractors. Input prices fell 0.4% on a monthly basis and are down 4.2% on a year-over-year basis. Nonresidential construction prices behaved similarly, falling 0.5% month-over-month and 4.6% year-over-year. Only two of the 11 key input prices have risen since November 2014.

“There are many factors at work, all helping to push commodity prices lower,” said ABC Chief Economist Anirban Basu. “These factors include a stronger U.S. dollar, weak economic performance among major emerging countries like China, Brazil and Russia, ongoing softness in economies in Europe, OPEC’s recent decision to maintain high levels of output, elevated levels of oil and gas output from private companies wrestling with debt service payments and the impact of energy-saving technologies.

“For now, the world is glutted with key construction inputs ranging from steel and copper to oil and natural gas,” said Basu. “While prices may stabilize during the months ahead, a sharp increase in input prices remains unlikely. With the Federal Reserve Bank contemplating interest rate increases in the near term, the U.S. dollar could get even stronger in 2016, helping to further suppress input price inflation.”

Only four key input prices rose in November on a monthly basis:

• Softwood lumber prices increased 2.4% on a monthly basis but fell 4.6% on a yearly basis.
• Prices for prepared asphalt and tar roofing and siding products rose 2.4% from the previous month but are 2.7% lower than at the same time a year ago.
• Plumbing fixtures and fittings prices were up 1.1% from October 2015 and 2.1% from November 2014.
• Concrete product prices rose 0.3% for the month and 2.9% on a year-over-year basis.

Seven key input prices fell in November on a monthly basis:

• Natural gas prices plunged 15.4% for the month and are 44% lower than at the same time a year ago.
• Crude petroleum prices fell 10.4% from October 2015 and are down 46.2% from November 2014.
• Crude energy materials prices slipped 9.2% during the month and are 36.9% lower than they were a year ago.
• Iron and steel prices dipped 3.7% for the month and 22.8% year-over-year.
• Prices for steel mill products fell 3.3% on a monthly basis and 18.4% on a yearly basis.
• Nonferrous wire and cable prices slid 0.8% month-over-month and 7.2% year-over-year.
• Prices for fabricated structural metal products fell 0.3% for the month and are 0.8% lower than at the same time a year ago.