حاولة لدراسة سلوك عوائد المحافظ الأوروبية وفقا لفرضية كفاءة الأسواق المالية An attempt to study the behavior of European portfolios returns According to the efficient market hypothesis

Abstract

In this article, we re-examine the subject of effcient market hypothesis, and we trying to explain behavior returns of european portfolios, this article evaluates the robustness capital asset pricing model (CAPM) ( who use only the β ) to explaining the returns . we find that (CAPM) model does a good job but he need other factors to explaining the returns.