OREANDA-NEWS. A.M. Best has removed from under review with negative implications and affirmed the financial strength rating of A++ (Superior) of most subsidiaries of Chubb Limited (Chubb) (formerly known as ACE Limited) (Zurich, Switzerland) [NYSE: CB], following the completion of The Chubb Corporation’s merger into ACE INA Holdings Inc., which was subsequently renamed Chubb INA Holdings, Inc. A.M. Best also has removed from under review with negative implications and downgraded the issuer credit rating (ICR) to “aa+” from “aaa” of the former property/casualty subsidiaries of The Chubb Corporation. Concurrently, A.M. Best has affirmed the ICR of “aa+” of most of the remaining Chubb subsidiaries, including ACE European Group Limited (United Kingdom).