OLDWICK, N.J.--(BUSINESS WIRE)--A.M. Best has affirmed the financial strength rating (FSR) of A (Excellent) and the issuer credit ratings (ICR) of “a” of the property/casualty subsidiaries of AmTrust Financial Services, Inc. (AFSI) (New York, NY) (NASDAQ:AFSI), also known as AmTrust Group (AmTrust). Concurrently, A.M. Best has affirmed the ICR of “bbb” and the debt ratings of AFSI. The outlook for all ratings is stable. (See below for a detailed list of the companies and ratings.) In addition,