Rating agency AM Best has assigned a financial strength rating of A+ (Superior) and an issuer credit rating of "aa-" to Swiss Re Corporate Solutions Ltd. The outlook assigned to both ratings is stable. In a statement the agency said: "The ratings of SRCSL are based on its strong expected risk-based capitalization, profitable projected operating results and worldwide scope of operations. SRCSL is the top level operating and holding company of Swiss Re Group's Corporate Solutions business segment, which provides property, casualty and special lines insurance to commercial businesses. "Swiss Re Group had been writing these lines of business through existing legal entities for many years, with a geographic focus on North America, Europe and Asia. "Initially, SRCSL's role will be to aggregate risk from its affiliated companies by providing various forms of internal and external reinsurance protection. The company will not initially write external business."