Downside Risk Management of a Defined Benefit Plan Considering Longevity Basis Risk

Yijia Lin, Ken Tan, Ruilin Tian and Jifeng Yu

North American Actuarial Journal, 2014, vol. 18, issue 1, 68-86

Abstract: To control downside risk of a defined benefit pension plan arising from unexpected mortality improvements and severe market turbulence, this article proposes an optimization model by imposing two conditional value at risk constraints to control tail risks of pension funding status and total pension costs. With this setup, we further examine two longevity risk hedging strategies subject to basis risk. While the existing literature suggests that the excess-risk hedging strategy is more attractive than the ground-up hedging strategy as the latter is more capital intensive and expensive, our numerical examples show that the excess-risk hedging strategy is much more vulnerable to longevity basis risk, which limits its applications for pension longevity risk management. Hence, our findings provide important insight on the effect of basis risk on longevity hedging strategies.

Date: 2014
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DOI: 10.1080/10920277.2013.852064

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