Delving into the intricacies of investor psychology, this research engages in an extensive systematic literature review to illuminate the intricate relationship between behavioral biases and investment decisions in the stock market. The study progresses through meticulous stages: research identification, literature search, document evaluation, synthesis, analysis, and reporting, encompassing 101 articles. It reveals a clear positive trend in financial decision-making research, starting in 2016 and peaking in 2022. Furthermore, the research also found that there are two journals domiciled in Switzerland, where there are 56,482 citations related to investment decision-making articles. One of these covered journals is Frontiers in Psychology, which has 11 articles with a total of 55,251 citations, placing it among the top 10 journals with the highest citations. This trajectory exposes various biases in the stock market, including overconfidence, availability, and herding. Previous research has examined overconfidence and its relationship with anchoring bias, availability, and herding, especially in emerging markets. However, a significant shift occurred in 2019 when researchers began investigating gambler’s fallacy and regret aversion bias. This momentum continued in 2021, with a surge in decision bias research, encompassing areas such as prospect theory and financial literacy. The findings of this research urge future research to explore conservatism, confirmation bias, regret aversion, framing, status-quo, and bias towards the familiar in investment choices, as these aspects offer rich research opportunities. Moreover, this encourages a deeper understanding of contributory factors, including financial literacy, income, education, gender, and age, in shaping and influencing investment decisions.