The Emh, the Financial Crisis and the Behavioral Finance

The EMH, the Financial Crisis and the Behavioral Finance 1. Introduction The Efficient Market Hypothesis (EMH) that was first proposed by Fama (1965, 1970) is the cornerstone of the modern financial economic theory. The EMH argues that the market is efficient and asset price reflects all the relevant information concerned about its return. The genius insight provided by the EMH has changed the way we look at the financial crisis thoroughly. However, the confidence in the EMH is eroded by the recent financial crisis. People can not help to ask: if the market is efficient and the price of assets is always correct as suggested by the EMH, why there exists such a great bubble in the financial market during the recent financial crisis?†¦show more content†¦This financial crisis has eroded the confidence in the EMH. The validity of the EMH and the existence of the efficient market are questioned broadly. If asset prices are always correct and reflect all the relevant information concerning about its return just as the EMH has suggested, why there exists such a great bubble in the financial market during the recent financial crisis? If the market is efficient, why the market fails to predict the collapse of Lehman Brothers, Bear Stern and other large financial institutions? Overall, the EMH fails to answer such questions. Moreover, the EMH also performs poor in explaining other financial crisis. One example is the Tulipmania that occurred in the 17th century. The prices of the tulip bulbs reached extremely high level which seriously deviates from its fundamental value that was suggested by the EMH. This apparent bubble is contradicted with the prediction of the EMH. In fact, the explaining power of the EMH becomes pale when confronting financial crisis. The EMH does not assume that investors are rational, but the EMH does assume that the market is efficient. 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