Optimal reinsurance–investment problem in a constant elasticity of variance stock market for jump‐diffusion risk model |
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Authors: | Zhibin Liang Kam Chuen Yuen Ka Chun Cheung |
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Institution: | 1. School of Mathematical Sciences, Nanjing Normal University, , Jiangsu, 210046 China;2. Department of Statistics and Actuarial Science, The University of Hong Kong, , Hong Kong, China |
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Abstract: | In this paper, we consider the jump‐diffusion risk model with proportional reinsurance and stock price process following the constant elasticity of variance model. Compared with the geometric Brownian motion model, the advantage of the constant elasticity of variance model is that the volatility has correlation with the risky asset price, and thus, it can explain the empirical bias exhibited by the Black and Scholes model, such as volatility smile. Here, we study the optimal investment–reinsurance problem of maximizing the expected exponential utility of terminal wealth. By using techniques of stochastic control theory, we are able to derive the explicit expressions for the optimal strategy and value function. Numerical examples are presented to show the impact of model parameters on the optimal strategies. Copyright © 2011 John Wiley & Sons, Ltd. |
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Keywords: | stochastic control CEV model exponential utility proportional reinsurance investment |
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