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Utility maximization under risk constraints and incomplete information for a market with a change point

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  • Oliver Janke

Abstract

In this article, we consider an optimization problem of expected utility maximization of continuous-time trading in a financial market. This trading is constrained by a benchmark for a utility-based shortfall risk measure. The market consists of one asset whose price process is modelled by a Geometric Brownian motion where the market parameters change at a random time. The information flow is modelled by initially and progressively enlarged filtrations which represent the knowledge about the price process, the Brownian motion and the random time. We solve the maximization problem and give the optimal terminal wealth depending on these different filtrations for general utility functions by using martingale representation results for the corresponding filtration.

Suggested Citation

  • Oliver Janke, 2017. "Utility maximization under risk constraints and incomplete information for a market with a change point," Applied Mathematical Finance, Taylor & Francis Journals, vol. 24(5), pages 451-484, September.
    • Handle: RePEc:taf:apmtfi:v:24:y:2017:i:5:p:451-484
    DOI: 10.1080/1350486X.2017.1409080
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