O excesso de confiança nas decisões de investimento
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Abstract
The overconfidence bias has been widely studied in the field of Behavioral Finance, with the aim of understanding how the respective bias manifests itself in the decision-making process, especially in environments of risk and uncertainty. However, there is a need to develop more reliable methods of evaluating and measuring overconfidence in investment situations. In this context, the present work aims to develop and validate a scale to measure overconfidence in investment decision-making processes, measuring the level of bias presented by the investor, considering the types of overconfidence: Overprecision, Overestimation and Overplacement. In addition to the systematic review, the methodology used was the survey, a questionnaire available on the internet, which was designed and applied to a sample of 413 respondents, which allowed us to create a measurement scale. Thus, the dissertation resulted in three articles that validate the manifestation of overconfidence bias in investment decision making. The first article, characterized as a systematic literature review, demonstrates the importance of effective measurement methods for overconfidence bias and indicates existing gaps regarding such methods. The second article is the empirical article where it presents the main results of the application of the scale and the confirmation of the proposed theoretical model. The third and last article presents in detail the creation process of the technical-technological product, being characterized by the measurement scale of the overconfidence bias or denominated Overconfidence scale. Thus, this dissertation demonstrates the need for effective methods of measuring cognitive biases and the influence of their manifestation on the investment decision-making process.
