Winners and losers: “The more often people look at their portfolios, the less willing they will be to take on risk, because if you look at it more often, you will experience more lossesm” says Richard Thaler. Photograph: Spencer Platt/Getty Images

In a world populated by Spock-like econs, all of us would conduct our financial affairs in a rational, self-interested manner. However, the world is p(...)

John Maynard Keynes is often quoted as saying: “When the facts change, I change my mind. What do you do, sir?” Photograph:  Picture Post/Getty Images

When I was much younger and editing an economics journal, I published an article by a distinguished professor – more distinguished, perhaps, for his p(...)

Checking stock prices too often is not good for your financial health, according to research. Photograph: Andrew Burton/Getty Images

Would you invest your money with a manager who didn’t know the names of any of the stocks in his portfolio, or the price they were purchased at? How w(...)

Cameron and Tyler Winklevoss, who have amassed a large bitcoin portfolio, in their office in New York last week. The twin brothers’ decision to go public with their position on the digital currency signals a new stage for what has been an experimental alternative to national currencies. Photograph: Agaton Strom/The New York Times

Bitcoin’s wild ride may not have been the biggest business story of the past few weeks, but it was surely the most entertaining. Over the cours(...)