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🔐 '''Reinsurer security''' refers to the financial strength and creditworthiness of a [[Definition:Reinsurer | reinsurer]], assessed in terms of its ability to honor [[Definition:Reinsurance | reinsurance]] obligations — particularly the payment of large or long-tail [[Definition:Claims settlement | claims]] — over the full duration of the contracts it has written. Because a [[Definition:Cedent | ceding company's]] reinsurance recoveries are only as reliable as the reinsurer standing behind them, evaluating reinsurer security is a critical discipline for [[Definition:Insurance carrier | primary insurers]], [[Definition:Reinsurance broker | brokers]], regulators, and [[Definition:Credit rating | rating agencies]] alike.

🔍 Assessment of reinsurer security draws on multiple sources. [[Definition:Credit rating | Credit-rating agencies]] — principally AM Best, S&P Global Ratings, Moody's, and Fitch — assign [[Definition:Financial strength rating (FSR) | financial strength ratings]] that signal a reinsurer's capacity to meet its policyholder obligations. Beyond ratings, sophisticated cedents and brokers conduct their own due diligence, analyzing [[Definition:Solvency | solvency]] ratios, [[Definition:Capital adequacy | capital adequacy]] under applicable regulatory regimes (such as [[Definition:Solvency II | Solvency II]] in Europe, [[Definition:Risk-based capital (RBC) | RBC]] in the United States, or [[Definition:C-ROSS | C-ROSS]] in China), [[Definition:Loss reserve | reserving]] adequacy, investment portfolio quality, and management track record. Many markets impose regulatory requirements tied to reinsurer security: U.S. states, for instance, restrict [[Definition:Reinsurance credit | reinsurance credit]] — the cedent's ability to reduce statutory [[Definition:Reserves | reserves]] by the amount ceded — to reinsurers that meet minimum capital, collateral, or rating thresholds. The [[Definition:National Association of Insurance Commissioners (NAIC) | NAIC's]] certified reinsurer framework and the EU–US Covered Agreement represent efforts to harmonize these standards across borders.

⚖️ Weak reinsurer security has been at the root of some of the industry's most painful episodes. When a reinsurer becomes insolvent or financially impaired, the cedent may be unable to collect on [[Definition:Reinsurance recoverables | recoverables]] precisely when it needs them most — after a major loss event or during a period of elevated [[Definition:Claims | claims]] activity. This counterparty concentration risk is why prudent cedents diversify their [[Definition:Reinsurance panel | reinsurance panels]], impose minimum-rating requirements in their [[Definition:Reinsurance buying | buying]] guidelines, and periodically stress-test their recoverable positions against hypothetical reinsurer defaults. The use of [[Definition:Collateral | collateral]] mechanisms — including [[Definition:Letter of credit | letters of credit]], [[Definition:Trust fund | trust funds]], and [[Definition:Funds withheld | funds-withheld]] arrangements — provides additional protection, particularly when ceding to unrated or lower-rated counterparties. In an industry built on promises, the security behind those promises matters as much as the terms printed on the contract.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Financial strength rating (FSR)]]
* [[Definition:Reinsurance recoverables]]
* [[Definition:Reinsurance credit]]
* [[Definition:Solvency]]
* [[Definition:Collateral]]
* [[Definition:Counterparty risk]]
{{Div col end}}

Definition:Reinsurer security - Revision history

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