Mortgage companies that were hoping to launch initial public offerings this year are putting their plans on hold these days thanks to a weak origination market, according to investment bankers and stock analysts who follow the industry. “It’s deader than a doornail,” said Paul Miller, a senior analyst with FBR Capital Markets. According to Miller, who tracks publicly traded mortgage companies such as Nationstar Mortgage, PHH Corp., and Walter Investment Management, the origination market has...