The portion of collateral an investor cannot recover at maturity because losses remain uncertain.
Trapped collateral means the sums a collateralized reinsurance investor cannot withdraw at the end of the cover period, because incurred losses remain too uncertain to settle. The contract then provides for a holdback, on the cedant's estimate, which can last years. The problem the concept names is specific to the collateralized model: where a traditional reinsurer reserves and keeps underwriting with the same capital, a collateralized investor has locked a precise amount for a precise period, and any extended holdback prevents it from redeploying at the next renewal, exactly when prices are rising. The effect is therefore doubly costly, since capital is immobilized when it is worth most. Heavy seasons have shown the scale of the phenomenon and led to tighter drafting: release thresholds, mandatory review dates, and recourse to an independent expert to arbitrate the amount withheld.
After a heavy hurricane season, a fund finds in early 2026 that 31 percent of its collateral, that is 218 million dollars, remains trapped on 2024 and 2025 contracts whose losses are unsettled. January renewal prices having risen 22 percent, the opportunity cost on capital it cannot redeploy is put at 14 million dollars for that year alone.
Trapped collateral, Collatéral immobilisé, Capital piégé, Trapped capital