Blame the financial crisis on testosterone levels.
About three years ago, there was a study published by Science Daily showing that people with high testosterone levels were more likely to take investment risks and make big bets on uncertain returns.
But now it seems we have another study, this one reported in New Scientist showing that people with low levels of the male sex hormone are also likely to take financial risks.
Maybe they are just over-compensating. Or maybe it's because, as the researchers suggest, the testosterone levels in one way or the other determine how averse someone is to risk. Specifically, individuals with low or high levels of testosterone were risk and ambiguity neutral. In other words, they didn't care about how risky an investment was. On the other hand, individuals with intermediate levels of testosterone were risk and ambiguity averse. This relationship was highly similar in men and women.
In any case, these sorts of studies suggest that biology might have an effect on investment decisions and behavior.
no comment untill now