Resumen
The reasons for dealing with the chosen topic can be found in the fact that there is a certain number of anomalies, system errors and conduct leaving the frames of rational behaviour, not being included and presented synthetically within a concise scientific work. Instead, the analysis deals with definite, already identified postulates of behavioural economics and finance. During the research, induction, deduction, comparative and abstraction methods are used. The challenge of the research lies in the identification of those system errors, partialities and behaviours deviating from postulates of rational, typical for classical finance, not being covered by standard behavioural, economic and finance literature. However, the challenge is even bigger because of the fact that it deals with answers to demands of universality and conciseness. Its greatest importance is reflected in the extent of identified and processed anomalies decision makers face, as well as in the identification and description of factors implying absence of rationality during the decision making process.