Abstarct: One of the important tasks of financial advisors is to optimize their services baxsed on customer’s financial risk preferences. Among the various factors that affecting the level of financial risk tolerance, personality traits can be considered as a component that is less altered than other risk factors and one of the most important factors affecting the level of financial risk. Know the financial viability of individuals. The purpose of this study was to investigate the possible relationship and the effect of each of the personality traits baxsed on the five-factor model on the level of financial riskiness of individuals in the face of different investment decisions and also the moderating role of People’s activity in social networks examine these relationships. The required data for this study were collected and analyzed using a questionnaire from 330 Tehran Stock Exchange Investors who were also present on Instagram social network. The results of this study showed that there is a significant and positive relationship between flexibility and decision making regarding gold buying and real estate independence and extraversion and decision making on buying bonds. There was a significant positive and significant relationship between the characteristics of pleasantness with regard to stock decision making, and the moderating role of individuals' presence in social networks was examined. During which the relationships were not meaningful.