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Pricing guaranteed annuity options in a linear-rational Wishart mortality model

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  • Da Fonseca, José

Abstract

This paper proposes a new model, the linear-rational Wishart model, which allows the joint modelling of mortality and interest rate risks. Within this framework, we obtain closed-form solutions for the survival bond and the survival floating rate bond. We also derive a closed-form solution for the guaranteed annuity option, i.e., an option on a sum of survival (floating rate) bonds, which can be computed explicitly up to a one-dimensional numerical integration, independent of the model dimension. Using realistic parameter values, we provide a model implementation for these complex derivatives that illustrates the flexibility and efficiency of the linear-rational Wishart model.

Suggested Citation

  • Da Fonseca, José, 2024. "Pricing guaranteed annuity options in a linear-rational Wishart mortality model," Insurance: Mathematics and Economics, Elsevier, vol. 115(C), pages 122-131.
    • Handle: RePEc:eee:insuma:v:115:y:2024:i:c:p:122-131
    DOI: 10.1016/j.insmatheco.2024.01.004
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    More about this item

    Keywords

    Mortality risk; Interest rate risk; Guaranteed annuity option; Linear-rational Wishart model; Dependence;
    All these keywords.

    JEL classification:

    • G13 - Financial Economics - - General Financial Markets - - - Contingent Pricing; Futures Pricing
    • G22 - Financial Economics - - Financial Institutions and Services - - - Insurance; Insurance Companies; Actuarial Studies

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