OLDWICK, N.J.--(BUSINESS WIRE)--A.M. Best has upgraded the financial strength rating to B++ (Good) from B+ (Good) and the issuer credit rating to "bbb" from "bbb-" of Guarantee Trust Life Insurance Company (Guarantee Trust) (Glenview, IL). The outlook for both ratings has been revised to stable from positive. Guarantee Trust is a mutual company that utilizes independent agents and brokers to provide a portfolio of health, accident, life and special risk insurance programs to individuals and fam
