Salvicchi, Gianluca (A.A. 2020/2021) The unorthodox investment’s choices of retail investors and their effects on stocks’ prices: analysis of the cognitive errors and instability of preferences in the investment decisional process and an in depth data analysis of three cases where retail investors’ choices radically influenced the US stock market. Tesi di Laurea in Financial markets and institutions, Luiss Guido Carli, relatore Stefano Di Colli, pp. 76. [Bachelor's Degree Thesis]