Credit enhancement levels for commercial MBS increased in the last quarter of 2014, which could lead to higher credit-support requirements for 2015 CMBS deals, according to Fitch Ratings. “The rating agencies are increasing credit enhancements on each tier of the CMBS bonds being offered because the underwriting has become more aggressive or the collateral is weak,” said Stephen Renna, president and CEO of the CRE Financial Council (CREFC), an industry trade group. The requirement for more credit support on the conduit deals shows...