Wealth heterogeneity in a closed pooled annuity fund

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Abstract

The stability of income payments in a pooled annuity fund is studied. In those funds, members receive a fluctuating income depending on their experienced mortality in exchange for their pension savings. The focus is on describing the influence of different initial savings on the ability of the fund to provide a stable income in retirement. Because of this, members coincide in their characteristics except for their initial savings. We identify a term, which we dub “implied number of homogeneous members”, that directly links the initial savings to the size of the income fluctuations. Our main contribution is the analysis of this term and the development of a criterion to answer the question of whether or not a given group of same-aged people should pool their funds together.
Original languageEnglish
JournalScandinavian Actuarial Journal
Publication statusAccepted/In press - 5 Jul 2023

Keywords

  • Tontine
  • unsystematic risk
  • wealth heterogeneity
  • the implied number of homogeneous members
  • beneficial groups

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