Shares of homebuilders are all lower in afternoon trading as the 10-year yield reached 3.07% and mortgage rates are pushing up to the all-important 5% range. MATERIAL COSTS. Adding to homebuilder headwinds are the threat of a trade war and the subsequent impact that will have on the materials that builders use including prices on lumber, copper and other materials needed in building homes. PRICE ACTION: Shares of Beazer Homes (BZH) and D.R. Horton (DHI) are leading the decline, down 5.1% and 6.5% respectively, while the whole group, including KB Home (KBH), Lennar (LEN), M.D.C. Holdings (MDC), Meritage Corporation (MTH), and Pulte Group (PHM), are all falling.