Exploring the Existence of Efficiency in the Financial Markets

Abstract

Since the market efficiency hypothesis theory was introduced by Fama in 1970, many investors and researchers argued about the efficiency form of the real financial market. In the real financial market, there are solid pieces of evidence that the price of securities could reflect related public information. However, as real human beings, the investors in the financial market are not always rational and act according to the assumptions stated in the market efficiency theory, which results in a reduction in the efficiency of the real financial market. In this paper, our group tends to use two different views (investors and companies) to prove that all of the market efficiency hypothesis theory assumptions are violated in the real financial market, and the current market efficiency is weak. From an investors view, our group tends to analyze the effect of psychological factors from investors on market efficiency. Furthermore, from the companies side, our group tends to use case analysis to provide solid evidence for the market efficiency analysis.