July 17. The US homebuilder confidence index fell to a new low in July 2008, the National Association of Home Builders (NAHB) reported. The NAHB/Wells Fargo Housing Market Index dropped to 16 in June from 18 a month earlier. The reading below 50 means most construction firms still consider market conditions as negative. The future sales expectations index for the next six months dipped to 23 in July from 27 a month ago.