Less than $1 million separated Fitch Ratings and DBRS in the ranking of top rating agencies serving the non-agency MBS market in the first quarter of 2017, a new Inside MBS & ABS analysis reveals. Fitch was on top, although both companies had equal shares (36.5 percent) of the market. Kroll Bond Rating (21.7 percent) and Moody’s Investors Services (17.5 percent) ranked third and fourth. S&P Global was the least active rater of non-agency MBS with just an 11.5 percent share. A significant share of non-agency MBS are issued...[Includes two data tables]