The Efficient Market Hypothesis has been under fire since Eugene Fame of the University Of Chicago Graduate School Of Business first suggested it back in the early 1960s. The central idea behind the Efficient Market Hypothesis is the theory that investors are completely rational in interpreting and acting on market news and information (which, ostensibly, is fully revealed public knowledge).
It has since come to be known as the Theory of Rational Expectations. This rational investor behavior is factored into the value of all news and information the moment it becomes available. And it happens to the extent that beating the market becomes an impossible task.
The idea of investor rationality has been under fire by the few “gurus” who have consistently beaten the market since its inception. Nobel Laureate and father of Behavioral Finance, Daniel Kahneman, pointed out that the failure of the rational model is not inherent in the logic of the theory, but rather in the human psyche. He posited that nobody has the ability to simultaneously process all incoming stimuli and attain a complete understanding and mastery of that stimuli.
From the many...