(HAR Report): A continued slowdown of new listings entering the market combined with another vibrant month of sales sent single-family homes inventory down to a 2.4-month supply compared to 3.8 months a year earlier. The last time inventory dropped that low was in December 2014. For October, new listings rose just 2.5 percent year-over-year. Housing inventory nationally stands at a 2.7-months supply, according to the National Association of Realtors (NAR).