Redwood Trust increased its acquisitions of jumbo mortgages in the third quarter, helped by strong demand for jumbo mortgage-backed securities. The real estate investment trust acquired jumbos with a total unpaid principal balance of $1.50 billion in the third quarter, up 25.0 percent from the previous period and up 15.4 percent a year ago. Officials said spread tightening helped the REIT compete with banks for jumbos. In the third quarter, Redwood closed two super-prime jumbo MBS with ...