A Note on Applications of Stochastic Ordering to Control Problems in Insurance and Finance

Nicole Bauerle and Erhan Bayraktar

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Abstract: We consider a controlled diffusion process $(X_t)_{t\ge 0}$ where the controller is allowed to choose the drift $\mu_t$ and the volatility $\sigma_t$ from a set $\K(x) \subset \R\times (0,\infty)$ when $X_t=x$. By choosing the largest $\frac{\mu}{\sigma^2}$ at every point in time an extremal process is constructed which is under suitable time changes stochastically larger than any other admissible process. This observation immediately leads to a very simple solution of problems where ruin or hitting probabilities have to be minimized. Under further conditions this extremal process also minimizes "drawdown" probabilities.

Date: 2012-10, Revised 2013-07
New Economics Papers: this item is included in nep-ias
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