跳扩散模型下权益指数年金的定价

Valuation of Equity-Indexed Annuity under Jump Diffusion Process

  • 摘要: 权益指数年金收益在最小保证基础上, 能参与特定权益的收益. 通常权益指数年金定价是在假设权益指数遵从Black-Scholes模式下进行的, 但是一些例外事件(比如, 重大的政治事件)的发生, 会导致价格的巨幅波动, 这个假设并不合理. 因此本文研究了权益指数在跳扩散模型下权益指数年金的定价问题. 运用Esscher变换方法得到了点对点指数收益方法下权益指数年金定价的显示解, 并对结果作了敏感性分析.

     

    Abstract: The Equity-Indexed Annuity (EIA) contract offers a proportional participation in the return on a specified equity index, in addition to a guaranteed return on the single premium. In general, valuation of Equity-Indexed Annuity is often assumed that the equity index is within the Black-Scholes framework. But some rare events (release of an unexpected economic figure, major political changes or even a natural disaster in a major economy) can lead to brusque variations in prices. So in the present work we study the equity index following a jump diffusion process. By Esscher transform, we obtain a closed form of the valuation of point-to-point EIA, which can be expressed as a function of some pricing factors. Finally, we conduct several numerical experiments in which, the break even participation rate \alpha can be solved when the other factors are fixed. The relationship between \alpha and the other factors are also discussed.

     

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