The Efficient Markets Hypothesis beholds that all public information is incorporated in the stock price. Yet economists question to what extent this holds, and these discussions are, among other factors, fuelled by the existence of analyst recommendations. If all information is already incorporated in the stock price, what value can analysts add? A comprehensive study on the German market finds that, indeed, a tangible effect is measured after analysts voice their recommendations; this effect is especially powerful when an analyst changes his recommendation to his previous one. Moreover, this...