Delta-hedging longevity risk under the M7–M5 model: The impact of cohort effect uncertainty and population basis risk

Kenneth Q. Zhou, Johnny Siu Hang Li

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

In a recent project commissioned by the Institute and Faculty of Actuaries and the Life and Longevity Markets Association, a two-population mortality model called the M7–M5 model is developed and recommended as an industry standard for the assessment of population basis risk. In this paper, we contribute a delta hedging strategy for use with the M7–M5 model, taking into account of not only period effect uncertainty but also cohort effect uncertainty and population basis risk. To enhance practicality, the hedging strategy is formulated in both static and dynamic settings, and its effectiveness can be evaluated in terms of either variance or 1-year ahead Value-at-Risk (the latter is highly relevant to solvency capital requirements). Three real data illustrations are constructed to demonstrate (1) the impact of population basis risk and cohort effect uncertainty on hedge effectiveness, (2) the benefit of dynamically adjusting a delta longevity hedge, and (3) the relationship between risk premium and hedge effectiveness.

Original languageEnglish (US)
Pages (from-to)1-21
Number of pages21
JournalInsurance: Mathematics and Economics
Volume84
DOIs
StatePublished - Jan 2019
Externally publishedYes

Keywords

  • Cohort effect
  • Delta hedging
  • Population basis risk
  • The M7–M5 model
  • Value-at-risk

ASJC Scopus subject areas

  • Statistics and Probability
  • Economics and Econometrics
  • Statistics, Probability and Uncertainty

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