The NAHB says builder confidence in the market for newly built, single-family homes improved slightly in November, according to the National Association of Home Builders/Wells Fargo Housing Market Index (HMI). The HMI rose one notch to 16 from a downwardly revised level of 15 in the previous month. The Northeast was the only region to post a decline in its HMI score in November, with a three-point drop to 13. Meanwhile, the Midwest posted a five-point gain to 18, the West posted a three-point gain to 15 and the South held even at 18.