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🌪️ '''Catastrophe loss''' refers to the aggregate financial damage an [[Definition:Insurance carrier | insurer]] or the broader insurance market sustains from a single large-scale event — such as a hurricane, earthquake, wildfire, or flood — that triggers a surge of [[Definition:Claim | claims]] across a wide geographic area within a compressed timeframe. Unlike attritional losses that accumulate gradually and predictably, catastrophe losses are sudden, correlated, and often severe enough to strain an insurer's [[Definition:Loss reserve | reserves]] and challenge the assumptions embedded in its [[Definition:Pricing model | pricing models]].

📊 Insurers quantify catastrophe losses using sophisticated [[Definition:Catastrophe model | catastrophe models]] that simulate the frequency and severity of natural and man-made disasters. Once an event occurs, [[Definition:Claims adjuster | claims adjusters]] and third-party assessment firms work to tally insured damages, while actuarial teams compare actual losses against modeled expectations. A significant portion of catastrophe losses is typically transferred to [[Definition:Reinsurance | reinsurers]] through [[Definition:Treaty reinsurance | treaty]] or [[Definition:Facultative reinsurance | facultative]] arrangements, and further layers may flow into the [[Definition:Insurance-linked securities (ILS) | insurance-linked securities]] market via [[Definition:Catastrophe bond | catastrophe bonds]]. The final net retained loss — what remains after all recoveries — is the figure that hits the [[Definition:Cedent | cedent's]] bottom line.

💡 The scale and unpredictability of catastrophe losses make them a defining challenge for the property and casualty sector. A single season of severe events can erode years of [[Definition:Underwriting profit | underwriting profit]], force [[Definition:Insurance carrier | carriers]] to raise [[Definition:Premium | premiums]], tighten [[Definition:Coverage | coverage]] terms, or exit certain markets altogether. For this reason, regulators, rating agencies, and investors scrutinize an insurer's catastrophe loss exposure as a core measure of financial resilience, and effective [[Definition:Catastrophe risk | catastrophe risk]] management remains one of the most consequential competencies in the industry.

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Catastrophe model]]
* [[Definition:Catastrophe risk]]
* [[Definition:Catastrophe bond]]
* [[Definition:Reinsurance]]
* [[Definition:Loss reserve]]
* [[Definition:Aggregate excess of loss]]
{{Div col end}}

Definition:Catastrophe loss - Revision history

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