The Investment Scientist

Part of Wall Street analysts’ job is to make earning forecasts of covered firms so as to guide investors’ actions. In 1996, Professor Rafael La Porta discovered an interesting phenomenon: the better the forecasts, the worse the returns! Twenty years have passed since his last paper, now we have two more decades of data. Does the new data confirm or contradict his original discovery? Well, see this graph, which I lifted right from his new paper.

Read the rest of this entry »