The Dodge Momentum Index fell 3.7 percent in November to 119.9 (2000=100) from its October reading of 124.5. The Momentum Index is a monthly measure of the first (or initial) report for nonresidential building projects in planning, which have been shown to lead construction spending for nonresidential buildings by a full year.

Previously, the Index had posted large month-to-month increases in July (+4.6 percent) and September (+4.9 percent). The loss of momentum seen in October and again in November is returning the Index to a level that’s more consistent with the gentle upward trend in planning activity that began in 2012. The decline in November for the overall Index was the result of a 10.2-percent slide in commercial planning activity, while projects entering planning in the institutional sector increased by 5.3 percent, according to the report.

There were a total of seven projects entering planning in November, each with a value that exceeded $100 million. For the commercial building sector, the leading projects were a $160 million office building in Boston and a $130 million retail project in Somerville, Mass. For the institutional building sector, the leading projects were a $325 million alteration of the American Museum of Natural History in New York and a $238 million hospital in Chula Vista, Calif.