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🎯 '''Index trigger''' is a payout mechanism used in [[Definition:Reinsurance | reinsurance]] contracts and [[Definition:Insurance-linked security (ILS) | insurance-linked securities]] that activates coverage when an independently compiled industry or parametric index crosses a predetermined threshold, rather than when the cedent's own losses reach a specified amount. Widely encountered in [[Definition:Catastrophe bond | catastrophe bonds]] and [[Definition:Industry loss warranty (ILW) | industry loss warranties]], this trigger type decouples the payout from the individual insurer's claims experience and ties it instead to a broader, transparent benchmark.

⚙️ A typical structure works like this: a [[Definition:Cedent | cedent]] sponsors a catastrophe bond with an index trigger referencing the PCS (Property Claim Services) estimate of total insured industry losses from U.S. hurricanes. If PCS reports that aggregate industry losses from a qualifying event exceed, say, $30 billion, the bond triggers and investors' principal is redirected to the cedent to cover its own losses. The cedent never has to prove its individual loss exceeded a certain figure — only that the industry-wide index breached the contractual threshold. Other common indices include modeled-loss outputs from firms like AIR Worldwide or RMS, as well as parametric readings such as earthquake magnitude or wind speed at designated stations.

📊 One of the primary advantages for investors is the reduced [[Definition:Moral hazard | moral hazard]] and [[Definition:Information asymmetry | information asymmetry]] compared to [[Definition:Indemnity trigger | indemnity triggers]], because the payout does not depend on the sponsor's internal claims handling or reserving practices. For the cedent, however, this convenience comes at the cost of [[Definition:Basis risk | basis risk]] — the possibility that the index triggers a payout that is either larger or smaller than the cedent's actual losses. Structuring the right index trigger therefore requires careful calibration by [[Definition:Actuary | actuaries]] and investment bankers, balancing the transparency that capital-market investors demand with the hedging precision the insurer needs to make the coverage economically meaningful.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Indemnity trigger]]
* [[Definition:Parametric trigger]]
* [[Definition:Modeled loss trigger]]
* [[Definition:Catastrophe bond]]
* [[Definition:Basis risk]]
* [[Definition:Industry loss warranty (ILW)]]
{{Div col end}}

Definition:Index trigger - Revision history

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