A transportation underwriter notices that 40% of their cargo book is concentrated in a single Gulf Coast port. Which portfolio management action best addresses this exposure?
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A
Purchase a quota share reinsurance treaty covering only Gulf Coast shipments
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B
Implement geographic spread guidelines to cap port concentration below a defined threshold
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C
Increase premium rates for Gulf Coast cargo by 40% to reflect the concentration
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D
Exclude catastrophic perils from all Gulf Coast policies