AM Best has affirmed A [Excellent] and “a” [Excellent] ratings for Rembrandt Insurance Company, Ltd., with a stable outlook. The ratings agency said, “AM Best has affirmed the Financial Strength Rating of A [Excellent] and the Long-Term Issuer Credit Rating of “a” [Excellent] of Rembrandt Insurance Company, Ltd. [Rembrandt] [Bermuda], a captive [re]insurer of Vitol …