NEW YORK–(BUSINESS WIRE)–Fitch Ratings has upgraded one and affirmed eight classes of Sovereign Commercial Mortgage Securities Trust commercial mortgage pass-through certificates series 2007-C1. A detailed list of rating actions follows at the end of this release. KEY RATING DRIVERS The affirmation of class D at ‘BBsf’ reflects the pool’s generally stable performance since Fitch’s rating action; The rating was capped as a result of the pool’s significant concentrations and adverse selection.