The research purpose to examine the effect of financial behavior on perceptions of stock investmentrnperformance in the capital market with investment decisions as a mediator and financial literacy as arnmoderator. The form of this research is a survey. Population in this study all capital market investors in thernIndonesia Stock Exchange (IDX) Pontianak City (11,352 investors). The sample selection using purposivernsampling and snowball sampling with the criteria of investors who have invested ± 1 in order to obtain arnsample of 100 respondents. The data collection techniques used were questionnaires, documentary studiesrnand literature studies. As for the analysis method used is the Structural Equation Modeling with WarpPLS.rn6.0. The results showed that overconfidence had a positive effect on investment decisions (p-value 0.019rn 0.05), financial literacy did notrnmoderate the effect of overconfidence (p-value 0.132> 0 , 05) but moderates the negative effect of herdingrn(p-value