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Gambler's Fallacy in Investors' Decision-making
Javůrková, Tereza ; Kukačka, Jiří (advisor) ; Červinka, Michal (referee)
This thesis focuses on the Gambler's Fallacy and its effect on the behavior of investors operating in the stock market. The aim is to incorporate the psychological findings about this behavioral phenomenon to the field of finance. This allows us to analyze the dynamics of the stock market that results from human misconceptions about the probabilities of independent events. More specifically, we analyze the profitability of two types of virtual investors whose decision-making is affected by distorted probabilities based on the Gambler's Fallacy. We further define two other trivial benchmark investors' strategies with different levels of randomness. We examine investors' gains in a simulated efficient market as well as in the real S&P 500 index constituents. Our analysis builds on three different approaches: simulation analysis, empirical frequency analysis, and asset pricing models. By applying the simulation approach together with frequency analysis on the historical stock prices, we find that investors affected by the Gambler's Fallacy gain statistically higher returns than a random investor. Then, we ap- ply both the three-factor and five-factor Fama & French asset pricing model to stocks sorted into portfolios based on their previous earnings per share evo- lution. Our findings reveal a negative...

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