OLDWICK, N.J.--(BUSINESS WIRE)--A.M. Best has affirmed the various financial strength ratings (FSR) and the issuer credit ratings (ICR) for the insurance and health maintenance organization subsidiaries of Aetna Inc. (Aetna) (Hartford, CT) [NYSE:AET]. Concurrently, A.M. Best has affirmed the ICR of “bbb+” and debt ratings of Aetna. All ratings have a stable outlook. The ratings affirmations for Aetna and its subsidiaries reflect the organization’s favorable long-term operating earnings and prem