https://www.insurerbrain.com/w/index.php?action=history&feed=atom&title=Definition%3ACatastrophe_excess-of-loss_reinsuranceDefinition:Catastrophe excess-of-loss reinsurance - Revision history2026-06-14T00:07:45ZRevision history for this page on the wikiMediaWiki 1.43.8https://www.insurerbrain.com/w/index.php?title=Definition:Catastrophe_excess-of-loss_reinsurance&diff=7362&oldid=prevPlumBot: Bot: Creating new article from JSON2026-03-10T12:50:59Z<p>Bot: Creating new article from JSON</p>
<p><b>New page</b></p><div>⛈️ '''Catastrophe excess-of-loss reinsurance''' is a form of [[Definition:Non-proportional reinsurance | non-proportional reinsurance]] that responds when a [[Definition:Cedent | ceding insurer's]] aggregate losses from a single catastrophic event surpass a contractually defined retention. The hyphenated spelling — "excess-of-loss" — appears frequently in treaty documentation and market parlance and is functionally identical to [[Definition:Catastrophe excess of loss reinsurance | catastrophe excess of loss reinsurance]]; the variation is purely stylistic. Regardless of how it is rendered on the page, this mechanism remains one of the most essential tools in the global [[Definition:Reinsurance | reinsurance]] market for absorbing the financial shock of natural and man-made catastrophes.<br />
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📐 Coverage operates on a per-occurrence basis: the contract defines an event through a combination of peril type, geographic scope, and a [[Definition:Hours clause | hours clause]] that sets the time window within which individual losses are aggregated into a single occurrence. The insurer retains the first tranche of loss — the [[Definition:Attachment point | attachment point]] — and recovers from reinsurers only for the excess, up to the layer's limit. Programs are typically tiered, with a working layer near the retention that activates relatively often and remote upper layers that respond only to extreme tail events. Pricing reflects this structure: reinsurers use [[Definition:Catastrophe model | catastrophe model]] output, historical loss experience, and their own [[Definition:Risk appetite | risk appetite]] to set [[Definition:Rate on line (ROL) | rates on line]] for each layer, and cedents negotiate terms such as [[Definition:Reinstatement | reinstatement]] premiums, exclusions for specific perils like [[Definition:Cyber risk | cyber]] or pandemic, and [[Definition:Co-participation | co-participation]] requirements.<br />
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🌐 The availability and cost of catastrophe excess-of-loss reinsurance directly shape the contours of the primary [[Definition:Property insurance | property insurance]] market. After a year of heavy catastrophe losses — such as 2017's trio of Hurricanes Harvey, Irma, and Maria — reinsurers tighten terms, raise retentions, and increase pricing, compelling primary carriers to adjust their own [[Definition:Underwriting | underwriting]] strategies and rate levels. Conversely, periods of benign loss experience attract fresh capital, including from [[Definition:Insurance-linked securities (ILS) | ILS]] investors, which exerts downward pressure on pricing. [[Definition:Rating agency | Rating agencies]] evaluate the adequacy of an insurer's catastrophe excess-of-loss program as a key input to financial strength ratings, making program design a strategic rather than purely tactical exercise.<br />
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'''Related concepts'''<br />
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* [[Definition:Catastrophe excess of loss reinsurance]]<br />
* [[Definition:Non-proportional reinsurance]]<br />
* [[Definition:Hours clause]]<br />
* [[Definition:Rate on line (ROL)]]<br />
* [[Definition:Insurance-linked securities (ILS)]]<br />
* [[Definition:Attachment point]]<br />
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