NEW YORK--(BUSINESS WIRE)--Fitch Ratings has downgraded three and affirmed 18 classes of Merrill Lynch Mortgage Trust commercial mortgage pass-through certificates, series 2007-C1 (MLMT 2007-C1). A detailed list of rating actions follows at the end of this press release. KEY RATING DRIVERS The affirmations reflect sufficient credit enhancement relative to Fitch-modeled loss expectations for the pool. The downgrades to the already distressed classes are due to a greater certainty of losses as th