Demand for non-agency products, including non-qualified mortgages, is growing among real estate investment trusts. A number of REITs have ramped up their investments in the non-agency sector, with some issuing mortgage-backed securities. Annaly Capital Management, the largest mortgage REIT, had $525.0 million in residential whole loans at the end of September, up from $392.0 million a year ago. The REIT didn’t disclose the total unpaid principal balance of its whole-loan holdings ...