Do you consider yourself an above-average driver? Do you feel more comfortable driving rather than flying? Do you judge your speed on the motorway by the other cars around you?

Calm down, dear – unlike that bumptious film director in the TV adverts, I’m not trying to sell you car insurance. But I am trying to sell you an investment strategy based on cognitive biases. Because if you answered yes to any of those three questions, you’re demonstrating the same behavioural mistakes that are driving the markets today – mistakes that fund managers believe can be exploited for profit.