AI Hub 14 August 2024 True or False: Does the Efficient Markets Hypothesis Hold Only If All Investors Are Rational? The Efficient Markets Hypothesis (EMH) is a cornerstone theory in financial economics, proposing that asset prices fully reflect all available information. There has been a long-standing debate on whether the EMH holds only if all investors behave rationally. This article will explore the intricacies of EMH, the behavioral nuances of investors, and whether irrational behavior can still align with the principles of EMH, thereby providing a comprehensive understanding crucial for traders and investors. Understanding the Efficient Markets Hypothesis EMH was introduced by economist Eugene Fama in the 1960s, positing that it's impossible to consistently achieve returns that outperform average market returns on a risk-adjusted basis after accounting for transaction costs. The hypothesis is often divided into three forms: Weak Form: Asserts that all past trading information is reflected in stock...
