https://www.insurerbrain.com/w/index.php?action=history&feed=atom&title=Definition%3AClash_riskDefinition:Clash risk - Revision history2026-05-04T06:54:38ZRevision history for this page on the wikiMediaWiki 1.43.8https://www.insurerbrain.com/w/index.php?title=Definition:Clash_risk&diff=7415&oldid=prevPlumBot: Bot: Creating new article from JSON2026-03-10T12:54:41Z<p>Bot: Creating new article from JSON</p>
<p><b>New page</b></p><div>💥 '''Clash risk''' arises when a single event or occurrence triggers losses across multiple [[Definition:Insurance policy | policies]], [[Definition:Line of business | lines of business]], or [[Definition:Reinsurance | reinsurance]] contracts written by the same [[Definition:Insurance carrier | insurer]] or [[Definition:Reinsurance | reinsurer]]. Unlike the straightforward aggregation of losses on a single policy, clash risk captures the hidden correlation between seemingly independent exposures — a dynamic particularly important in [[Definition:Reinsurance | reinsurance]] pricing and [[Definition:Catastrophe modeling | catastrophe modeling]]. A major industrial explosion, for example, might simultaneously generate [[Definition:Property insurance | property]], [[Definition:Workers' compensation insurance | workers' compensation]], [[Definition:General liability insurance | general liability]], and [[Definition:Environmental liability insurance | environmental liability]] claims that all funnel back to the same reinsurer.<br />
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🔗 Reinsurers manage clash risk primarily through [[Definition:Clash cover | clash covers]] — a form of [[Definition:Excess of loss reinsurance | excess-of-loss reinsurance]] that sits above per-policy retentions and responds when aggregate losses from a single event exceed a specified threshold across the cedant's portfolio. Quantifying this exposure requires sophisticated [[Definition:Accumulation management | accumulation management]] and scenario analysis, because standard per-risk models may not capture the correlations between disparate accounts. [[Definition:Underwriting | Underwriters]] must map their exposures geographically and by peril, looking for concentrations where a single catastrophe or liability event could cascade through multiple books simultaneously.<br />
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🛡️ Neglecting clash risk has historically produced some of the most severe reinsurer losses on record, including those arising from large-scale [[Definition:Natural catastrophe | natural catastrophes]] and mass tort events like asbestos litigation. Regulators and [[Definition:Rating agency | rating agencies]] increasingly expect carriers and reinsurers to demonstrate robust clash-risk monitoring as part of their [[Definition:Enterprise risk management (ERM) | enterprise risk management]] frameworks. For [[Definition:Cedant | cedants]] purchasing reinsurance, properly structuring protections against clash exposure can mean the difference between a manageable loss year and a capital-threatening one.<br />
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'''Related concepts'''<br />
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* [[Definition:Clash cover]]<br />
* [[Definition:Excess of loss reinsurance]]<br />
* [[Definition:Accumulation management]]<br />
* [[Definition:Catastrophe modeling]]<br />
* [[Definition:Aggregate exposure]]<br />
* [[Definition:Enterprise risk management (ERM)]]<br />
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