Catastrophe models relied upon by Bermuda's reinsurance sector can become outdated in as little as two years, an industry expert has warned, raising fresh questions about how the island's risk carriers price exposure in a rapidly changing climate.

The caution carries particular weight for Bermuda, home to one of the world's largest concentrations of reinsurance capital, where catastrophe modelling underpins billions of dollars in underwriting decisions each year. Models that fail to keep pace with shifting weather patterns, new construction data and evolving loss experience could leave insurers and reinsurers mispricing risk, the expert noted.

The warning comes as the Atlantic hurricane seasons of recent years have tested assumptions built into earlier generations of models. Rapid urban development in coastal regions, inflation in rebuilding costs and the increasing frequency of severe convective storms have all contributed to model drift, making frequent updates and validation essential for firms operating in the Bermuda market.

Industry observers say the findings reinforce the need for reinsurers to invest continuously in model refinement and to treat vendor outputs as one tool among many rather than definitive answers. For Bermuda, whose economy depends heavily on the international reinsurance industry, maintaining confidence in the accuracy of risk assessment remains critical to the island's standing as a global hub for catastrophe coverage.