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Stochastic Mortality, Macroeconomic Risks and Life Insurer Solvency

Authors
Disciplines
  • Economics
  • Mathematics

Abstract

Motivated by a recent demographic study establishing a link between macroeconomic fluctuations and the mortality index kt in the Lee–Carter model, we develop a dynamic asset-liability model to assess the impact of macroeconomic fluctuations on the solvency of a life insurance company. Liabilities in this stochastic simulation framework are driven by a GDP-linked variant of the Lee–Carter mortality model. Furthermore, interest rates and stock prices react to changes in GDP, which itself is modelled as a stochastic process. Our simulation results show that insolvency probabilities are significantly higher when the reaction of mortality rates to changes in GDP is incorporated.

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