An analytical study of participating policies with minimum rate guarantee and surrender option

An analytical study of participating policies with minimum rate guarantee and surrender option
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最低利率保证和退保选择的分红保单分析研究

DOI:
10.1007/s00780-022-00471-0
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发表时间:
2022
影响因子:
1.7
通讯作者:
Chiarolla M
Chiarolla M
中科院分区:
经济学2区
文献类型:
--
作者:
Chiarolla M

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我们对一类分红保单的价值进行了详细的理论研究,这类保单具有四个关键特征:(i)保单持有人保证保单准备金的最低利率;(ii)保单保持器可以随时终止合同,直到到期(退保选择权);(iii)到期日(或在退保时),如果支持保单的投资组合表现优于当前保单储备,则红利将记入保持器;(iv)由于偿付能力的要求,如果相关资产组合的价值福尔斯保单准备金,则合约终止。我们的分析是概率性的,并依赖于最佳停止和自由边界理论。我们发现了一个结构的最佳投降策略,这是未被发现的以前(主要是数值)的研究主题。合约的最优放弃由两个“止损”边界和一个“太好而不能持续”边界触发(用Ekström和Vaicenavicius在Stoch的语言)。过程130:806-823)。这一战略的财政影响进行了详细讨论,并支持广泛的数值实验。
We perform a detailed theoretical study of the value of a class of participating policies with four key features: (i) the policyholder is guaranteed a minimum interest rate on the policy reserve; (ii) the contract can be terminated by the holder at any time until maturity (surrender option); (iii) at the maturity (or upon surrender), a bonus is credited to the holder if the portfolio backing the policy outperforms the current policy reserve; (iv) due to solvency requirements, the contract ends if the value of the underlying portfolio of assets falls below the policy reserve.Our analysis is probabilistic and relies on optimal stopping and free boundary theory. We find a structure of the optimal surrender strategy which was undetected by previous (mostly numerical) studies on the topic. Optimal surrender of the contract is triggered by two ‘stop-loss’ boundaries and by a ‘too-good-to-persist’ boundary (in the language of Ekström and Vaicenavicius in Stoch. Process. Appl. 130: 806–823, ). Financial implications of this strategy are discussed in detail and supported by extensive numerical experiments.
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