The securitization of income-property mortgages nosedived in the first quarter of 2017, with most of the downturn in the volatile non-agency sector, according to an Inside MBS & ABS analysis. A total of $48.29 billion of MBS backed by commercial properties was issued in the first quarter, down 27.7 percent from the previous period. Although production was down 6.1 percent from the same period in 2016, it was close to the average quarterly volume of $49.35 billion that the market has produced since the beginning of 2014. The average for the 2011-2013 period was just $32.00 billion. Average volume is...[Includes one data table]