The hour between dog and wolf

Testosterone-fuelled young male city traders, on a winning streak, shift their risk preferences and take on too much risk. When they lose money in a volatile market, their hormonal response drives the financial community to being risk averse. Dr John Coates explains "We've been trying to identify the molecules and nervous pathways in the body that contribute to this transformation, that would account for shifts in risk preferences which we think destabilise the financial markets."