NEW YORK--(BUSINESS WIRE)--Fitch Ratings affirms the senior and subordinate notes issued by SLM Student Loan Trust 2012-4 trust at \'AAAsf\' and \'AAsf\', respectively. The Rating Outlook remains Stable for both the senior and subordinate notes. A detailed list of rating actions follows at the end of this press release. KEY RATING DRIVERS High Collateral Quality The collateral consists of 100% of Federal Family Education Loan Program (FFELP) loans. The credit quality of the trust collateral is high
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