Investors who are too confident can cause problems in financial markets. This study looked at how a person's education background affects their overconfidence in the Vietnamese market. The researchers used surveys to collect data from Vietnamese investors and looked at how their education level and major choice influenced their overconfidence. They found that education can impact overconfidence, especially depending on whether the person works in finance or not. The results suggest that the Vietnamese context and the way overconfidence is measured also play a role in this relationship.