OREANDA-NEWS. A.M. Best has assigned a Long-Term Issue Credit Rating (Long-Term IR) of “a-” to the $300 million 2.875% 10-year senior unsecured notes and $400 million 4.00% 30-year senior unsecured notes recently issued by Aflac Incorporated (Aflac) (Columbus, GA) [NYSE: AFL]. The outlook assigned to these Credit Ratings (ratings) is stable. Aflac’s existing Long-Term Issuer Credit Ratings remain unchanged.