This study uses the students' virtual trading records along with the questionnaire to explore the relationship of different personality traits, gender and disposition effect through constructing a structural equation modeling. Furthermore, whether the disposition effect of individual investors would lead a lower rate of returns is also discussed. The findings show that the individual investors exhibit a significant disposition effect, and male investors have a higher rate of return than female. The trait of extroversion has a negative effect on disposition effect, and the more agreeable investors would exhibit higher disposition effect.