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Optimal investment under behavioural criteria in incomplete diffusion market models

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  • Mikl'os R'asonyi
  • Jos'e Gregorio Rodr'iguez-Villarreal

Abstract

The most commonly accepted model for investors' preferences is expected utility theory. More recently, other theories have emerged and pose new challenges to mathematics. The present paper treats preferences of cumulative prospect theory (CPT), where an "S-shaped" utility function is considered (i.e. convex up to a certain point and concave from there on). Also, distorted probability measures are applied for calculating the utility of a given position with respect to a (possibly random) benchmark $G$. Such problems have heretofore been solved essentially for complete continuous-time market models only. In the present paper we make a step forward and consider incomplete models of a diffusion type where the return of the investment in consideration depends on some economic factors. Our main result asserts, under mild assumptions, the existence of an optimal strategy when the driving noise of the economic factors is independent of that of the investment and the rate of return is non-negative. We are also able to accommodate models of a specific type where the factor may have non-zero correlation with the investment.

Suggested Citation

  • Mikl'os R'asonyi & Jos'e Gregorio Rodr'iguez-Villarreal, 2015. "Optimal investment under behavioural criteria in incomplete diffusion market models," Papers 1501.01504, arXiv.org.
  • Handle: RePEc:arx:papers:1501.01504
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    References listed on IDEAS

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    1. Miklós Rásonyi & Andrea Rodrigues, 2013. "Optimal portfolio choice for a behavioural investor in continuous-time markets," Annals of Finance, Springer, vol. 9(2), pages 291-318, May.
    2. Tversky, Amos & Kahneman, Daniel, 1992. "Advances in Prospect Theory: Cumulative Representation of Uncertainty," Journal of Risk and Uncertainty, Springer, vol. 5(4), pages 297-323, October.
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    6. Daniel Kahneman & Amos Tversky, 2013. "Prospect Theory: An Analysis of Decision Under Risk," World Scientific Book Chapters, in: Leonard C MacLean & William T Ziemba (ed.), HANDBOOK OF THE FUNDAMENTALS OF FINANCIAL DECISION MAKING Part I, chapter 6, pages 99-127, World Scientific Publishing Co. Pte. Ltd..
    7. repec:dau:papers:123456789/2317 is not listed on IDEAS
    8. Miklos Rasonyi & Andrea M. Rodrigues, 2012. "Optimal Portfolio Choice for a Behavioural Investor in Continuous-Time Markets," Papers 1202.0628, arXiv.org, revised Apr 2013.
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