NEW YORK--(BUSINESS WIRE)--Fitch Ratings has upgraded one and affirmed five classes of notes issued by Newstar Commercial Loan Trust 2007-1 (NewStar 2007-1). Fitch has also revised the Outlook on one class of notes to Positive. A complete list of rating actions follows at the end of this release. KEY RATING DRIVERS The upgrade and the revised Outlook are the result of increased credit enhancement due to the significant amortization of the capital structure, driven by loan prepayments in the por


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