Collateralized reinsurance and sidecar

Collateralized reinsurance is reinsurance in which the capacity provider's commitment is fully backed by collateral posted in advance, generally up to the maximum limit of the cover. In traditional reinsurance the cedant relies on the reinsurer's future financial strength; here credit risk disappears, since the funds needed to pay a possible loss are already locked away and available. The capacity most often comes from capital-market investors, specialist funds or pension funds, drawn by the low correlation between insurance risk and financial markets, and it is part of the insurance-linked securities (ILS) market. The sidecar is a variant: a dedicated, limited-duration vehicle created to co-invest alongside a reinsurer on a defined share of its portfolio, often in catastrophe reinsurance. The reinsurer quickly mobilizes external capacity without permanently loading its balance sheet, and investors get targeted exposure. For the market, these structures bring valuable alternative capacity, especially when traditional reinsurance capacity tightens, and are gradually opening insurance risk, cyber included, to the financial markets.