Real estate investment trusts focused on the residential mortgage market had a stellar year in 2014, returning 19.4 percent to investors, a nice comeback from the year before when performance was measured at negative 12.7 percent. According to figures compiled by the National Association of Real Estate Investment Trusts, commercial financing REITs fared a bit worse, returning 14.5 percent compared to a mouth-watering yield of 41.8 percent in 2013. But now both sectors face...