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Valuing equity-linked death benefits in jump diffusion models
Journal article   Peer reviewed

Valuing equity-linked death benefits in jump diffusion models

Hans U Gerber, Elias S.W Shiu and Hailiang Yang
Insurance, mathematics & economics, Vol.53(3), pp.615-623
11/2013
DOI: 10.1016/j.insmatheco.2013.08.010
url
http://hdl.handle.net/10722/198096View
Open Access

Abstract

The paper is motivated by the valuation problem of guaranteed minimum death benefits in various equity-linked products. At the time of death, a benefit payment is due. It may depend not only on the price of a stock or stock fund at that time, but also on prior prices. The problem is to calculate the expected discounted value of the benefit payment. Because the distribution of the time of death can be approximated by a combination of exponential distributions, it suffices to solve the problem for an exponentially distributed time of death. The stock price process is assumed to be the exponential of a Brownian motion plus an independent compound Poisson process whose upward and downward jumps are modeled by combinations (or mixtures) of exponential distributions. Results for exponential stopping of a Lévy process are used to derive a series of closed-form formulas for call, put, lookback, and barrier options, dynamic fund protection, and dynamic withdrawal benefit with guarantee. We also discuss how barrier options can be used to model lapses and surrenders. •The stock price process is assumed to be the exponential of a jump diffusion.•Results for exponential stopping of a Lévy process and the Wiener–Hopf factorization are employed.•Options are exercised at the time of death.•For a series of options, closed form formulas for their expected payoff are given.•It is also discussed how barrier options can be used to model lapses and surrenders.
 Equity-linked death benefits Variable annuities Jump diffusion Exponential stopping Barrier options

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