Abstract Background and Purpose: Behavioural finance is a relatively new, but rapidly evolving field that provides explanations of an economic decision-making by cognitive psychology, conventional economic and financial theory. Behavioural finance searches the influence of psychology on the behaviour of financial practitioners and the subsequent effects on the financial markets. The purpose of the paper is the research on behavioural aspects of financial decision-making as they help explain why and how markets might be inefficient. Design/Methodology/Approach: Fuzzy logic is an excellent tool for working with linguistic variables that are often found when working with behavioural data. Thus, we analyse the financial decision-making process from the perspective of behavioural finance aimed at better understanding of the decision-making process of investors applying the principles of fuzzy logic to solve various financial problems. Results: The results of the study indicate that fuzzy logic is applicable when solving problems of financial management and financial decision-making problems. The urgency of the fuzzy logic application for managerial and financial decisions should be emphasized. Research in this area indicates that in some cases, as in the case of behavioural financing, the use of fuzzy logic is far more suitable than the use of other methods (Peters, Aguiar and Sales). Conclusion: The novelty of the paper is to extend the application of fuzzy sets in the area of financial decision-making. The paper demonstrates that despite the fact, that fuzzy logic is currently used mainly in technical directions, it is applicable also in financial management, especially, in cases where it is necessary to consider the influence of human and the occurrence of linguistic variables.

中文翻译：

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财务决策的行为方面

摘要背景与目的：行为金融学是一个相对较新但发展迅速的领域，它通过认知心理学，传统的经济和金融理论为经济决策提供了解释。行为金融学研究心理学对金融从业者行为的影响以及对金融市场的后续影响。本文的目的是研究金融决策的行为方面，因为它们有助于解释市场效率低下的原因和方式。设计/方法/方法：模糊逻辑是处理语言变量的出色工具，而语言变量通常是在处理行为数据时发现的。从而，我们从行为金融学的角度分析财务决策过程，旨在更好地了解投资者的决策过程，运用模糊逻辑原理解决各种财务问题。结果：研究结果表明，模糊逻辑适用于解决财务管理和财务决策问题。应该强调模糊逻辑在管理和财务决策中的紧迫性。该领域的研究表明，在某些情况下，例如在行为融资方面，使用模糊逻辑比使用其他方法（Peters，Aguiar和Sales）更合适。结论：本文的新颖之处在于扩展了模糊集在财务决策领域中的应用。