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Rev Fin 1991; 4:727-752
© 1991 the Society for Financial Studies
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Stock price distributions with stochastic volatility: an analytic approach
1 Princeton University, Princeton, USA
2 Sloan School of Management, MIT, Cambridge, MA 02139, USA
Abstract
We study the stock price distributions that arise when prices follow a diffusion process with a stochastically varying volatility parameters. We use analytic techniques to derive an explicit closed-form solution for the case when volatility is driven by an arithmetic Ornstein-Uhlenbeck (or AR1) process. We then apply our results to two related problems in the finance literature: (i) options pricing in a world of stochastic volatility, and (ii) the relationship between stochastic volatility and the nature of 'fat tails' in stock price distributions.
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