Bank of America, Morgan Stanley and Wells Fargo are preparing to issue the first commercial MBS that will comply with risk-retention requirements, according to presale reports published this week. While industry participants continue to debate which type of risk-retention will be more commonly used, the pending $870.56 million MBS will include vertical retention. Wells Fargo Commercial Mortgage Trust 2016-BNK1 received provisional AAA ratings from Fitch Ratings, Kroll Bond Rating Agency and Standard & Poor’s. Fitch said the three originators contributing to the MBS will retain credit risk representing 5.0 percent of pool balance via the vertical retention option. Risk-retention requirements for commercial MBS take effect...