Evaluation of Stock Market Decisions Based on Cumulative Prospect Theory

Abstract

Both the prospect theory as well as the cumulative prospect theory are aimed at explaining the way the decision-maker see and evaluate risky decisions. They allow for the explanation of some inconsistency between observed decision-makers behaviours and axioms of the expected utility theory. For years financial aspects of cumulative prospect theory are the subject of many research studies. The purpose of the paper is to review some issues connected with the cumulative prospect theory and its application to financial market. Presented papers concern issues related to the value functions, concept of loss aversion and the construction of portfolio selection models with some simplifying assumptions. In our paper we also present observed in real life, but often mysterious, behaviours of investors, who evaluate investment choices relative to some reference point, feel loss aversion and revalue objective probabilities