Efficient Market Hypothesis : Effect Of High Frequency And Insider Trading

The efficient market hypothesis (EMH) has been subject to professional and academic debate and analysis for many years, and refers to the theory proposing that stock prices show all information regarding a firm’s value. An efficient market is a market in which investors with the same information and similar investment goals compete actively (Sewell, 2012). Many private investors and investors aiming to make profits are involved with the stock market and often make low risk investments while aiming for high rates of return. However, the efficient market hypothesis states that it is impossible to consistently outperform the stock market as the market is able to quickly adjust to new information. The Efficient Market Hypothesis also addresses

The efficient market hypothesis (EMH) is an important assumption in finance. What are the various forms of the EMH? Does the EMH in any of its forms make sense given the current economic circumstances?

The efficient market, as one of the pillars of neoclassical finance, asserts that financial markets are efficient on information. The efficient market hypothesis suggests that there is no trading system based on currently available information that could be expected to generate excess risk-adjusted returns consistently as this information is already reflected in current prices. However, EMH has been the most controversial subject of research in the fields of financial economics during the last 40 years. “Behavioural finance, however, is now seriously challenging this premise by arguing that people are clearly not rational” (Ross, (2002)). Behavioral finance uses facts from psychology and other human sciences in order to

random errort. The expected return is a function of a security‟s risk and the random component is due to new information, which by definition arrives randomly; hence, in a weak form efficient market, stock prices follow a random walk ,that is cannot be predicted (see fig. 2) (Hillier et al 2010).

Chapter seven: What does the efficient market theory have to do with Financial markets? Discuss the positives and negatives of the theory. Why do Wall-Street types not like it? Explain the coin flipping experiment, as it relates to investment diversification.

Capital markets provide a function which facilitates the buying and selling of long-term financial securities to increase liquidity and their value, Watson & Head (2013). Hence, the Efficient Market Hypothesis (EMH) explains the relationship that exists with the prices of the capital market securities, where no individual can beat the market by regularly buying securities at a lower price than it should be. This means that in order to be an efficient market prices of securities will have to fairly and fully reflect all available information, Fama (1970). Consequently, Watson & Head (2013) believe that market efficiency refers to the speed and quality of how share price adjusts to new information. Nevertheless, the testing of the efficient markets has led to the recognition of three different forms of efficiency in which explains how information available is used within the market. In this essay, the EMH will be analysed; testing of EMH will show that the model does provide strong evidence to explain share behaviour but also anomalies will be discussed that refutes the EMH. Therefore, a judgment will be made to see which structure explains the efficient market and whether there are some implications with the EMH, as a whole.

Efficient Market Hypothesis has been controversial issues among researcher for decades. Until now, there is no united conclusion whether capital markets are efficiency or not. In 1960s, Fama (1970) believed that market is very efficient despite there are some trivial contradicted tests. Until recently, both empirical and theatrical efficient market hypothesis was being disputed by behavior finance economist. They have found that investor have psychological biases and found evidences that some stocks outperform other stocks. Moreover, there are evidences prove that market are not efficient for instance financial crisis, stock market bubble, and some investor can earn abnormal return which happening regularly in stock markets all over the world. Therefore, the purpose of this essay is to demonstrate that Efficient Market Hypothesis in stock (capital) markets does not exist in the real world by proofing four outstanding unrealistic conditions that make market efficient: information is widely available and cost-free, investor are rational, independent and unbiased, There is no liquidity problem in stock market, and finally stock prices has no pattern.

The behaviour of markets and investors, the decision making in the market place and the dynamics of demand and supply in any given market cannot be determined with a hundred percent accuracy. However master minds in the past have designed various techniques and theories that help investors make a particular buying decision, or to make choices logically. These theories and techniques help today’s investors to peep into the future and make almost immaculate predictions regarding the future behaviour of the market and the ongoing trends. A lay man night view the decision making of an investor as being solely based upon speculation but in reality every move that an investor makes today in the market place is backed up by sound calculation and

The Efficient-Market Hypothesis (EMH) states that it is impossible to beat the market because stock market efficiency causes existing share prices to always incorporate and reflect all relevant information.

The premise of an efficient market is that stock prices adjust accordingly as information is received. The speed and accuracy of the pricing changes are a reflection of the strength of the market efficiency, where in theory a perfectly efficient market will re-adjust prices immediately and precisely with new information. The efficient market hypothesis aligns with beliefs about whether technical and fundamental analyses are useful in making investment decisions or whether a passive approach is appropriate. In a perfectly efficient market, these types of analyses are not able to predict stock price trends (based on market inefficiencies or price abnormalities) which could assist in portfolio positioning or investment management. However, some investors belive that the market pricing is not precise and that there are timing windows and pricing trends that can be identified through analysis of past performance and finding price abnormalities where all information is not correctly reflected in the stock price (Hirt, Block and Basu, 2006).

Chapter seven: What does the efficient market theory have to do with Financial markets? Discuss the positives and negatives of the theory. Why do Wall-Street types not like it? Explain the coin flipping experiment, as it relates to investment diversification.

The efficient-market hypothesis (EMH) is one of the well-known methods for measuring the future value of stock prices. According to this hypothesis, the market is efficient if its prices are formed on the basis of all disposable information. According to EMH if there is a possibility to predict the future price of shares, that is the first sign of an inefficient market.

As our discussion of market efficiency suggested, identifying mispriced securities is not easy. Yet there are enough chinks in the efficient market hypothesis and hence the search for mispriced securities cannot be dismissed out of hand. Moreover, remember that is

As Chapter 10 questions, if further evidence continues to surface that capital markets do not always behave in accordance with the efficient market hypothesis, then should we reject the research that has embraced the EMH as a fundamental assumption? In this regard we can return to earlier chapters of this book in which we emphasised that theories are abstractions of reality. Capital markets are made of individuals and as such it would not (or perhaps, should not) be surprising to find that the

If a capital market fully and accurately reflects all relevant information when determining the price of the securities, the market is effective and the three characteristics of the effective capital market are efficient operation, efficient price, and efficient distribution(Sascha Kurth,2013). There are three forms of efficiency market, this article will analyze the characteristics of semi-strong effective market and the impact of the abnormal Book-Market-value effect on the effective market hypothesis so that investors should be dialectical view of the market hypothesis and the emergence of abnormal to make the stable investment activities.