The increase in the use of internet, mobile devices and social media tools causes an increase in the factors affecting the investment decisions of individual investors. Especially social media platforms can trigger individual investors' fear of missing out (FoMO), uncertainty avoidance and impulsive buying emotions, which can direct investors' behavior and directly affect their investment decisions. In the literature, FoMO, uncertainty avoidance and impulsiveness, which have been studied in marketing, communication, and psychology, have been addressed separately in a few studies in finance. The most important point that distinguishes this study from other studies is that the relationship between FoMO, uncertainty avoidance and impulsiveness in the investment decisions of individual investors is studied together. The data used in the study was collected through a survey to measure uncertainty avoidance, impulsivity and FoMO levels from people over the age of 18, who have income and have made at least one financial investment. In the study, factor analysis was conducted on the participants' investment preferences, uncertainty avoidance, impulsivity and FoMO scales, Cronbach Alpha values of the factors were examined, and then cluster analysis was conducted for each scale. In the study, by examining individual investors' investment preferences and investment frequency separately, it was concluded that investors who invest in the same investment type exhibit different behaviors according to their investment frequency. This shows that investors who invest in the same investment instruments have different levels of FoMO, impulsiveness and uncertainty avoidance. The relationships between the frequency of investment in each type of investment and FoMO, uncertainty avoidance and impulsiveness are presented in detail in the relevant sections of the study.