Borrowers are increasingly changing the terms for loans backing recently issued commercial MBS shortly after the deal closes, said Fitch Ratings. The rating service said it has received about 15 requests this year for rating confirmations pertaining to loans from 2014 or 2015 vintage deals. While the majority of requests have been loan assumptions by new borrowing entities or ownership structures, a handful have contemplated more fundamental changes to other loan terms. But Fitch said the problem arises when some of the proposed changes would have required that the loan be modeled differently or more conservatively, had it known about the changes prior to issuance. The rating agency is especially concerned about borrowers trying to add more debt. “Additional debt, ...