Most real estate investment trusts that invest in MBS and other mortgage-related assets reported declines in their holdings of agency and non-agency securities during the fourth quarter, according to a new Inside MBS & ABS ranking and analysis. The top publicly traded REITs had a combined residential MBS portfolio valued at $228.28 billion as of the end of 2016. That was down 3.5 percent from the previous quarter and off 6.5 percent from the end of 2015. The figures are preliminary because several smaller REITs have not yet reported fourth-quarter results. Agency MBS continued...[Includes one data table]