Investment decisions are influenced by a large number of factors beyond pure rational analysis. The study explores the mediating effect of regret aversion bias and herding bias on investment experience and investment decisions. The study aimed to understand the effect of parallel mediation on the relationship between the dependent and the independent variable. The sample of the study included 212 individual investors from India. The Structural Equation Modeling (SEM) is used to understand the mediation effect. It was found that the herding bias significantly impacts the relationship between investment experience and investment decision. However, regret aversion bias does not mediate the relationship. The study contributes to the existing body of knowledge by understanding how behavioral biases and experiences interact to shape investment behavior.