What to believe? Nobel Laureate, Eugene Fama, is often described as 'the Father of Finance' for his work on portfolios, asset pricing and share markets. Yet in a recent research paper looking at 50 years of modern finance, he says most asset pricing models fail, we don't know how to calculate the cost of capital, and betas for individual stocks are "garbage". He describes behavioural economics as "mostly just dredging for anomolies".