MEXICO CITY–(BUSINESS WIRE)– #insurance–AM Best has upgraded the Long-Term Issuer Credit Rating (ICR) to “bbb+” (Good) from “bbb” (Good) and affirmed the Financial Strength Rating (FSR) of B++ (Good) of Golden Tree Reinsurance Limited (Golden Tree) (Bermuda). The outlook of the Long-Term ICR has been revised to stable from positive while the outlook of the FSR is stable. Golden Tree is a subsidiary of Iris Financial Services Limited (IFS) and is owned ultimately by Springbrook Capital Ltd., a private hol