NEW YORK--(BUSINESS WIRE)--Fitch Ratings takes the following rating actions on the SLM Student Loan Trust 2005-10 notes: --Class A-4 notes affirmed at 'AAAsf'; Outlook Stable; --Class A-5 notes affirmed at 'AAAsf'; Outlook revised to Negative from Stable; --Class B notes affirmed at 'A+sf'; Outlook Stable. The Rating Outlook revision is due to Fitch's belief that the class A-5 outstanding notes carry a heightened level of extension risk. Based on Fitch's cash flow modelling runs, the notes were