OLDWICK, N.J.--(BUSINESS WIRE)--A.M. Best has upgraded the issuer credit rating (ICR) to “bbb+” from “bbb” and affirmed the financial strength rating (FSR) of B++ (Good) of USIC Life Insurance Company (USIC Life) (San Juan, PR). Concurrently, A.M. Best has affirmed the FSR of A (Excellent) and ICR of “a+” of United Surety & Indemnity Company (USIC) (San Juan, PR). The outlook for all ratings is stable. The upgrade reflects A.M. Best’s view of the growing strategic importance and risk divers