The relation to investing
Durand says personality traits are remarkably stable once you reach the age of 30. Therefore, if you determine your personality traits early on in your investing career and understand how they'll affect your decision-making then you should be able to avoid some mistakes. He also makes note of the fact that two of the factors, neuroticism and extraversion, seem to play a larger role compared to the other traits.
Investors scoring high in neuroticism are attracted to risk, but they seem to find it disturbing. They want to do something about it, but seem incapable of doing so; they will sell risky stocks only to buy others. Regardless, neuroticism is associated with heightened emotion.
Higher extraversion scores are associated with higher returns, even after adjusting for risk. Durand says, "Extraverts are attracted to higher risk, but they manage it better, getting higher returns for higher risk, which should be the case according to standard finance theory."