Searching for the cause of the incipient recession? Try testosterone. At least, according to a new study out of Cambridge. The Guardian Reports that among London traders, those with higher levels of the hormone in the morning tended to (ahem) perform better—but it can also lead to overconfidence and irrational behavior, which then triggers stress hormones and clouds judgment, resulting in (you guessed it) potential market crashes. Tough news for manly men, we're afraid—especially given that another new study suggests Gordon Gekko was right: Money might be the root of all happiness, after all.