JCPenney, the largest retail tenant in the commercial mortgage-backed securities universe, suffered a 24.8% drop in sales in 2012 as market execs began to question what will happen to big box retailers with poor earnings that are also major CMBS tenants [After several rough quarters, JCPenney is expected to report positive fourth quarter results. And bookseller Barnes & Noble, another major CMBS tenant, just reported earnings of $173 million for fiscal 2013, compared to $59 million during the same period in 2012]ÉThe estate of Lehman Brothers sold The Bond Building at 1400 New York Avenue in Washington, D.C., for around $107 millionÉA private letter ruling from the Internal Revenue Service was being seen as a green light to include sustainable and renewable energy assets in real estate investment trusts.