Bounds of Ruin Probabilities for Insurance Companies in the Presence of Stochastic Volatility on Investments

摘要

In this work we consider a model of an insurance company where the insurer has to face a claims process which follows a Compound Poisson process with finite exponential moments. The insurer is allowed to invest in a bank account and in a risky asset described by Geometric Brownian motion with stochastic volatility that depends on an external factor modelled as a diffusion process. By using exponential martingale techniques we obtain upper and lower bounds for the ruin probabilities, that recover the known bounds for constant volatility models. Finally we apply the results to a truncated Scott model.