OLDWICK, N.J.--(BUSINESS WIRE)--A.M. Best has upgraded the issuer credit ratings (ICR) to “a+” from “a” and affirmed the financial strength rating (FSR) of A (Excellent) of American Strategic Insurance Corp (ASI) (St. Petersburg, FL) and its affiliates. The ratings have been removed from under review with positive implications and assigned a stable outlook. The ratings were placed under review following the announcement that The Progressive Corporation (Progressive) [NYSE:PGR] had agreed to acq