Behawioralna wartość bieżąca w postaci skierowanych liczb rozmytych
Behavioural present value in terms of ordered fuzzy numbers

Summary/Abstract: The starting point for our discussion is behavioural present value defined as a positive L-R fuzzy number. In this paper, the information described by means of BPV is supplemented with a subjective forecast of the orientation of the market price trend. The forecast is implemented in the BPV model as an orientation of the positive fuzzy number. The following rules of recording the alleged orientation of the trend are used: 1. Presumption of market price increase is described as positive orientation of fuzzy number. 2. Presumption of market price decrease is described as negative orientation of fuzzy number. In this way, BPV is presented as an ordered fuzzy number. Thus defined BPV is used to determine the rate of return. With the obvious assumption that the future value is a random variable, the determined rate of return is described as an ordered fuzzy probabilistic set. Finally, it is shown that the return rate reveals an orientation opposite to the orientation of BPV, which is consistent with the theory of finance.

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