Fannie Mae and Freddie Mac are unlikely to shun AA-rated mortgage insurers as a result of recent changes in the final risk-based capital rules governing both government-sponsored enterprises, according to Wall Street mortgage industry analysts. Modifications proposed by the Office of Federal Housing Enterprise Oversight to the “haircut” provisions in its risk-based capital rule have diminished chances that the GSEs will revamp their MI requirements, analysts say. Consequently, double-A rated MIs would not have to