Modern Portfolio Theory, standard asset pricing models and the concept of rational decision makers in efficient markets have major limitations as systems for modeling investor behavior and prices of financial assets. Financial market participants are not a uniform group of rational investors....

When value and glamour stocks missed earnings expectation targets, what happened to their stock prices over the following year? Prices of value stocks increased when earnings expectations were beat and missed - and even when business fundamentals deteriorated. Glamour stocks behaved more...

The correlation of returns for various equity asset classes has been high. In addition, the range or "dispersion" of returns across asset classes - and across sectors within those asset classes - has been low. These factors have made it difficult for active managers to outperform. But dispersion...