Hatteras Financial has ramped up its efforts to acquire jumbo mortgages and plans to issue a jumbo mortgage-backed security before the end of the year, according to officials at the real estate investment trust. “Our portfolio plus commitments of jumbo [adjustable-rate mortgages] today is estimated to be about $258 million, so we’re making progress and nearing scale where we can consider securitization,” Benjamin Hough, Hatteras’ president and COO, said this week ...