The factors affecting the investment decisions of individuals: A study on the change of bank stock prices

Account owners are known to direct their funds to investment tools via various methods aiming at various goals. There are many different factors affecting the investment decisions of account owners. Moreover, financial world has always tried to explain what affects the investment decisions of the account owners by using many theories. While general finance theories hypothesise that the investors act rationally according to the relation between the investment risk and its expected return, behavioral finance theories hypothesise that, without acting rationally, the investors are affected with the psychological and sociological factors. In this study, it is researched if the investors demanding to invest on stocks can hold abnormal returns from these investment tool according to the end of year financial statement disclosures of the firms. As data set 13 banks traded in Istanbul Stock Exchange (BIST) and BIST 100 index price data are used. Referring to the financial statement disclosures of the banks belonging to the years of 2013-2018, cumulative average abnormal returns for the days around the event day (the declaration day of the financial statement) are calculated by Event Study methodology. As a result, according to the analysed banking stocks of the investors declared for the years of 2013-2018, it is determined that the abnormal returns around the day on which financial statement disclosures are made (event day) can be obtained. Key Words: The Term of Investment, Financial Statement Disclosures, Event Study, Abnormal Return