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Robust Mean-Variance Hedging of Longevity Risk

机译:长寿风险的稳健均值对冲

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摘要

Parameter uncertainty and model misspecification can have a significant impact on the performance of hedging strategies for longevity risk. To mitigate this lack of robustness, we propose an approach in which the optimal hedge is determined by optimizing the worst-case value of the objective function with respect to a set of plausible probability distributions. In the empirical analysis, we consider an insurer who hedges longevity risk using a longevity bond, and we compare the worst-case (robust) optimal hedges with the classical optimal hedges in which parameter uncertainty and model misspecification are ignored. We find that unless the risk premium on the bond is close to zero, the robust optimal hedge is significantly less sensitive to variations in the underlying probability distribution. Moreover, the robust optimal hedge on average outperforms the nominal optimal hedge unless the probability distribution used by the nominal hedger is close to the true distribution.
机译:参数不确定性和模型错误指定可能会对长寿风险对冲策略的性能产生重大影响。为了缓解这种缺乏鲁棒性的问题,我们提出了一种方法,其中,通过针对一组可能的概率分布优化目标函数的最坏情况值来确定最佳对冲。在经验分析中,我们考虑使用寿险债券对冲寿险的保险公司,并将最坏情况(稳健)的最优对冲与忽略参数不确定性和模型错误指定的经典最优对冲进行比较。我们发现,除非债券的风险溢价接近零,否则稳健的最优套期保值对潜在概率分布变化的敏感度将大大降低。此外,除非标称套期保值者使用的概率分布接近真实分布,否则平均而言,鲁棒最优对冲要优于标称最优对冲。

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  • 来源
    《The journal of risk and insurance》 |2017年第s1期|459-475|共17页
  • 作者单位

    Nankai Univ, Sch Finance, Tianjin, Peoples R China;

    Tilburg Univ, Dept Econ & Operat Res, Tilburg, Netherlands|Netspar, Tilburg, Netherlands;

    Tilburg Univ, Dept Econ & Operat Res, Tilburg, Netherlands|Netspar, Tilburg, Netherlands;

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