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📜 '''Catastrophe bond (cat bond)''' is a [[Definition:Capital markets | capital-markets]] security through which [[Definition:Insurance carrier | insurers]] and [[Definition:Reinsurance | reinsurers]] transfer peak [[Definition:Catastrophe | catastrophe]] exposure to institutional investors in exchange for a risk premium, using a [[Definition:Special purpose vehicle (SPV) | special purpose vehicle]] to hold fully collateralized proceeds. The structure emerged in the 1990s as a response to capacity shortages in traditional [[Definition:Reinsurance | reinsurance]] markets following major hurricane and earthquake losses. Today, cat bonds represent one of the most mature and liquid segments of the [[Definition:Insurance-linked securities (ILS) | insurance-linked securities]] market, covering perils ranging from U.S. hurricanes and Japanese earthquakes to European windstorms and [[Definition:Pandemic risk | pandemic]] events.

⚙️ A sponsor — often a large [[Definition:Insurance carrier | carrier]], [[Definition:Reinsurance | reinsurer]], or government entity — works with investment banks to structure a bond around a specific risk layer, selecting a trigger mechanism that determines when investor principal is at risk. Common trigger types include [[Definition:Indemnity trigger | indemnity]] (based on the sponsor's actual losses), [[Definition:Industry loss index trigger | industry-loss index]] (based on aggregate market losses), [[Definition:Parametric trigger | parametric]] (based on physical event characteristics), and [[Definition:Modeled loss trigger | modeled loss]] (based on output from a [[Definition:Catastrophe modeling | catastrophe model]] applied to the sponsor's exposures). Investors — typically [[Definition:Institutional investor | pension funds]], hedge funds, and dedicated [[Definition:Insurance-linked securities (ILS) | ILS]] fund managers — evaluate the expected loss, coupon spread, and modeled risk profile before committing capital. Coupons combine a money-market rate on the collateral with the [[Definition:Premium | risk premium]] paid by the sponsor.

💡 Cat bonds occupy a strategic role for both sides of the transaction. For sponsors, they provide multi-year, fully collateralized protection that diversifies their [[Definition:Reinsurance | reinsurance]] panel and eliminates [[Definition:Counterparty risk | counterparty credit risk]]. For investors, they offer attractive yields with low correlation to equity and bond markets, though the tail risk of total principal loss is real and demands rigorous analysis. The market's continued expansion has spurred innovation in trigger design, parametric product development, and data transparency — trends that benefit [[Definition:Insurtech | insurtech]] platforms exploring new [[Definition:Distribution channel | distribution channels]] for risk transfer.

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Insurance-linked securities (ILS)]]
* [[Definition:Catastrophe modeling]]
* [[Definition:Parametric insurance]]
* [[Definition:Special purpose vehicle (SPV)]]
* [[Definition:Reinsurance]]
* [[Definition:Basis risk]]
{{Div col end}}

Definition:Catastrophe bond (cat bond) - Revision history

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