People with "anxious" version of serotonin transporter gene 5-HTTLPR invested 28% less money in risky investments.
People with the high risk-taking version of the dopamine gene DRD4 invested about 25 percent more in risky investments.
References:
Risky business. CNN.
No stomach for market turmoil? Thank your genes. Reuters.
Is risk taking in our genes? CNN.
Related:
Androgen exposure: Stock traders with the longest ring fingers made more money, linked to aggression, quick reactions