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🤝 '''Capacity sharing''' is an arrangement in insurance and [[Definition:Reinsurance | reinsurance]] markets where two or more [[Definition:Insurance carrier | carriers]], [[Definition:Lloyd's syndicate | syndicates]], or capital providers jointly commit [[Definition:Underwriting capacity | underwriting capacity]] to write a particular book of business, line of coverage, or individual risk, distributing both the [[Definition:Premium | premium income]] and the [[Definition:Loss | loss exposure]] among participants according to agreed proportions. This practice is foundational to large-scale commercial, specialty, and [[Definition:Reinsurance | reinsurance]] markets, where individual risks — such as an offshore energy platform, a major construction project, or a catastrophe [[Definition:Treaty reinsurance | treaty]] — frequently exceed the appetite or regulatory limits of any single insurer. Capacity sharing enables the market to underwrite risks of a magnitude that no single balance sheet could prudently absorb alone.

⚙️ In practice, capacity sharing takes many forms. In the [[Definition:Lloyd's of London | Lloyd's]] market, it is the fundamental operating model: a [[Definition:Broker | broker]] presents a risk to a lead [[Definition:Underwriter | underwriter]], who sets the terms and takes a share, after which the broker approaches following markets to fill the remaining capacity on the [[Definition:Slip | slip]]. [[Definition:Coinsurance | Coinsurance]] panels in continental European and Asian markets operate similarly, with each participating insurer taking a defined percentage of the risk and issuing its own [[Definition:Policy | policy]] portion or signing onto a shared contract. In [[Definition:Facultative reinsurance | facultative reinsurance]], capacity sharing occurs when a ceding insurer places portions of a single large risk with multiple reinsurers. More structured forms include [[Definition:Insurance pool | pools]] and [[Definition:Consortium | consortia]] — such as nuclear insurance pools or aviation war risk pools — where members pre-commit capacity to a jointly managed program. [[Definition:Managing general agent (MGA) | MGAs]] and [[Definition:Coverholder | coverholders]] may also facilitate capacity sharing by aggregating paper from several carriers onto a single program.

🌍 Effective capacity sharing is what allows the global insurance market to absorb peak exposures — from natural catastrophe seasons to emerging risks like [[Definition:Cyber insurance | cyber]] accumulation — without concentrating undue [[Definition:Risk | risk]] on any single entity. It also promotes competitive pricing, because the availability of multiple capacity sources for a given risk class prevents monopolistic behavior. However, capacity sharing introduces coordination challenges: participants must align on [[Definition:Policy wording | policy wording]], [[Definition:Claims management | claims handling]] protocols, and [[Definition:Reserving | reserving]] practices, and the lead underwriter's terms must be acceptable to followers who may have different [[Definition:Risk appetite | risk appetites]] and regulatory environments. Regulators in several jurisdictions scrutinize capacity-sharing arrangements for potential [[Definition:Antitrust | antitrust]] concerns, particularly when pools or consortia concentrate market power. Despite these complexities, the principle of spreading risk across multiple balance sheets remains one of the insurance industry's most enduring and essential mechanisms.

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Underwriting capacity]]
* [[Definition:Coinsurance]]
* [[Definition:Insurance pool]]
* [[Definition:Lloyd's of London]]
* [[Definition:Facultative reinsurance]]
* [[Definition:Consortium]]
{{Div col end}}

Definition:Capacity sharing - Revision history

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