(RTTNews) - Despite inflation concerns and ongoing production bottlenecks, the National Association of Home Builders released a report on Wednesday showing a modest improvement in U.S. homebuilder confidence in the month of December. The report said the NAHB/Wells Fargo Housing Market Index inched up to 84 in December from 83 in November, reaching its highest level since a matching reading in February. "The most pressing issue for the housing sector remains lack of inventory," said NAHB Chief Economist Robert Dietz.