https://www.insurerbrain.com/w/index.php?action=history&feed=atom&title=Definition%3ACatastrophe_%28CAT%29 2026-04-30T06:40:31Z Revision history for this page on the wiki MediaWiki 1.43.8 https://www.insurerbrain.com/w/index.php?title=Definition:Catastrophe_(CAT)&diff=8666&oldid=prev 2026-03-11T04:27:46Z

<p>Bot: Creating new article from JSON</p> <p><b>New page</b></p><div>🌪️ &#039;&#039;&#039;Catastrophe (CAT)&#039;&#039;&#039; refers, in the insurance context, to a severe event — natural or man-made — that produces a large concentration of [[Definition:Loss | losses]] across many [[Definition:Insurance policy | policies]] within a short timeframe and a defined geographic area. The [[Definition:Insurance Services Office (ISO) | Insurance Services Office (ISO)]] and [[Definition:Property Claim Services (PCS) | Property Claim Services (PCS)]] in the United States formally designate a catastrophe when insured losses from a single event exceed a specified dollar threshold and affect a significant number of [[Definition:Policyholder | policyholders]] and [[Definition:Insurance carrier | insurers]]. Hurricanes, earthquakes, wildfires, floods, and terrorist attacks all qualify, as do severe convective storms that generate widespread [[Definition:Hail damage | hail]] and wind damage.<br /> <br /> 🔍 The industry treats catastrophes differently from attritional losses because their size and correlation break the normal pooling assumptions that underpin [[Definition:Insurance | insurance]]. A single hurricane can trigger hundreds of thousands of [[Definition:Claim | claims]] simultaneously, overwhelming an insurer&#039;s expected [[Definition:Loss ratio | loss ratio]] for an entire year. To manage this concentration risk, carriers rely on [[Definition:Catastrophe modeling | catastrophe models]], purchase [[Definition:Catastrophe reinsurance | catastrophe reinsurance]], and may transfer peak exposures to [[Definition:Capital markets | capital markets]] through instruments like [[Definition:Catastrophe bond (CAT bond) | catastrophe bonds]]. [[Definition:Underwriter | Underwriters]] also impose [[Definition:Catastrophe sublimit | sublimits]], [[Definition:Deductible | deductibles]], and geographic restrictions to contain their aggregate [[Definition:Catastrophe exposure | catastrophe exposure]].<br /> <br /> ⚠️ Catastrophes shape nearly every strategic dimension of property insurance — from [[Definition:Rate | pricing]] and [[Definition:Reserve | reserving]] to [[Definition:Capital management | capital management]] and [[Definition:Reinsurance | reinsurance]] buying. A single active hurricane season can harden the entire global [[Definition:Reinsurance market | reinsurance market]], while consecutive quiet years can soften it. With climate change intensifying the frequency and severity of extreme weather, the definition and financial footprint of catastrophes continue to expand, making CAT risk one of the most closely watched variables across the industry.<br /> <br /> &#039;&#039;&#039;Related concepts:&#039;&#039;&#039;<br /> {{Div col|colwidth=20em}}<br /> * [[Definition:Catastrophe event]]<br /> * [[Definition:Catastrophe modeling]]<br /> * [[Definition:Catastrophe reinsurance]]<br /> * [[Definition:Catastrophe bond (CAT bond)]]<br /> * [[Definition:Probable maximum loss (PML)]]<br /> * [[Definition:Aggregate exposure]]<br /> {{Div col end}}</div>

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