Optimizing the terminal wealth under partial information: The drift process as a continuous time Markov chain
We consider a multi-stock market model where prices satisfy a stochastic differential equation with instantaneous rates of return modeled as a continuous time Markov chain with finitely many states. Partial observation means that only the prices are observable. For the investor’s objective of maximizing the expected utility of the terminal wealth we derive an explicit representation of the optimal trading strategy in terms of the unnormalized filter of the drift process, using HMM filtering results and Malliavin calculus. The optimal strategy can be determined numerically and parameters can be estimated using the EM algorithm. The results are applied to historical prices. Copyright Springer-Verlag Berlin/Heidelberg 2004
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Volume (Year): 8 (2004)
Issue (Month): 4 (November)
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