BY JANN SWANSON
The National Association of Home Builders (NAHB)/Wells Fargo Housing Market Index (HMI) is flirting with the danger zone. Although stressing that the index remains in positive territory, NAHB said its measure of home builder confidence lost 4 points compared to November, landing at 56. It was the lowest reading since May 2015 and followed an 8-point drop last month. NAHB said the index is reflecting concerns over housing affordability.