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🔄 '''Swing-rated treaty''' is a [[Definition:Reinsurance | reinsurance]] arrangement in which the [[Definition:Ceding commission | ceding commission]] or the [[Definition:Reinsurance premium | reinsurance premium rate]] adjusts retrospectively based on the actual [[Definition:Loss experience | loss experience]] of the ceded portfolio during the treaty period. Rather than locking in a flat rate at inception, a swing-rated treaty establishes a sliding scale — typically defined by minimum and maximum commission or premium rates — that moves up or down as the [[Definition:Loss ratio | loss ratio]] develops. This mechanism shares risk between the [[Definition:Ceding company | cedant]] and the [[Definition:Reinsurer | reinsurer]], rewarding favorable results and penalizing poor performance.

⚙️ The mechanics hinge on a predefined formula linking the premium or commission to the treaty's incurred loss ratio at specified evaluation points. In a common structure, the provisional rate is charged at inception; once losses are reported and developed — often at 12, 24, and 36 months — the rate adjusts according to the agreed sliding scale. If losses come in below the expected level, the cedant benefits through a higher ceding commission (or lower premium rate); if losses deteriorate, the commission decreases (or the premium rate rises), shifting more of the cost back to the cedant, subject to a floor and ceiling. The minimum and maximum bounds protect both parties from extreme outcomes. Swing-rated provisions appear most frequently in [[Definition:Proportional reinsurance | proportional treaties]] — [[Definition:Quota share reinsurance | quota shares]] and [[Definition:Surplus reinsurance | surplus treaties]] — but analogous retrospective rating features also surface in certain [[Definition:Excess of loss reinsurance | excess of loss]] contracts. Proper application requires reliable and timely [[Definition:Loss development | loss development]] data, and [[Definition:Actuary | actuaries]] on both sides closely monitor [[Definition:Incurred but not reported (IBNR) | IBNR]] estimates to ensure fair evaluation.

📈 Swing-rated treaties appeal to both cedants and reinsurers because they align economic incentives more closely than flat-rated structures. A [[Definition:Primary insurer | primary insurer]] confident in its [[Definition:Underwriting | underwriting]] discipline stands to earn back significant commission if losses remain low, effectively reducing the net cost of reinsurance. Reinsurers, in turn, gain downside protection: if the book performs poorly, the swing mechanism claws back commission or increases premium, limiting the reinsurer's ultimate loss. This mutual accountability makes the structure especially common in long-tail lines such as [[Definition:Casualty insurance | casualty]] and [[Definition:Professional liability insurance | professional liability]], where loss development patterns extend over many years and initial pricing carries substantial uncertainty. During [[Definition:Soft market | soft market]] cycles, swing-rated treaties can serve as a middle ground — offering cedants competitive provisional terms while protecting reinsurers from the full impact of adverse development. From a financial reporting standpoint, the variable nature of the commission requires careful [[Definition:Reserving | reserving]] and disclosure under both [[Definition:IFRS 17 | IFRS 17]] and [[Definition:US GAAP | US GAAP]], as the ultimate economics of the treaty remain uncertain until the loss experience is fully developed.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Sliding scale commission]]
* [[Definition:Ceding commission]]
* [[Definition:Proportional reinsurance]]
* [[Definition:Loss ratio]]
* [[Definition:Retrospective rating]]
* [[Definition:Profit commission]]
{{Div col end}}

Definition:Swing-rated treaty - Revision history

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