Protection Growth, Balance-Sheet Capacity and the Economics of Risk
Transfer
Valeria D’Amato
Abstract
Mortality risk transfer is often approached from the perspective of available instruments, reinsurance structures or capital-market capacity. This paper adopts a cedant-side perspective and identifies the conditions under which growth in the primary protection market generates a mortality exposure large and systematic enough to create an economically meaningful demand for additional risk-bearing capacity. The framework separates diversifiable mortality variation from common mortality shocks, introduces Systematic Mortality Intensity (SMI), and measures the insurer’s Net Demographic Exposure (NDE) after allowing for the interaction between mortality-sensitive and longevity-sensitive liabilities. These quantities feed into a Mortality Risk Capacity Frontier (MRCF), which characterises the combinations of protection scale, systematic dependence and balance-sheet capacity that can be supported before the preferred allocation of risk changes. The associated thresholds P^RI, P^K and P^dagger identify, respectively, the activation of conventional risk sharing, the capital-only scale limit and the point at which broader capacity becomes economically relevant. An illustrative calibration shows that reinsurance can more than double the sustainable protection scale relative to full retention, while a broader capacity set can increase it further. The analysis is extended to regime-dependent mortality dynamics, under which shifts in systematic mortality intensity move the capacity frontier even if nominal protection volume is unchanged. The paper also distinguishes technical transferability from economic investability: broader institutional participation requires sufficiently pure exposure, reliable data, transparent modelling, manageable basis risk and maturity alignment. The resulting development chain runs from protection demand and product design to mortality exposure, risk measurement, capacity allocation and, where economically justified, additional sources of risk-bearing capacity.
Keywords:
mortality risk; life insurance; protection market; systematic mortality; natural hedging; reinsurance; risk-bearing capacity; insurance-linked risk; capital allocation.
