In 2016, retail sales conducted over the Internet boomed while traffic at America’s shopping malls remained tepid, raising new concerns about CMBS deals where the collateral includes a troubled “anchor” tenant. According to figures compiled by Morningstar, roughly $49 billion of CMBS transactions are backed by regional malls. When the anchor closes, it raises all sorts of concerns about whether the entire mall will be able to survive. (Earlier this year, Sears and Macy’s separately announced they will close a total of 218 stores.) “As online shopping, the diminishing importance of department stores, and store closures all contribute...