The document discusses the efficient market hypothesis (EMH), which states that stock prices already reflect all available public information, making it impossible for investors to outperform the market through strategies based on historical prices, economic news, or other public data. There are three forms of the EMH - weak, semi-strong, and strong - differing in the type of information believed to be reflected in prices. While several studies have found evidence supporting the EMH, others have found anomalies like value and small firm effects that appear to allow above-market returns. The validity of the EMH remains controversial.
Discuss the differences between weak form, semi-strong form and strong form capital market efficiency, and critically evaluate the significance of the efficient market hypothesis (EMH) for the financial manager, using examples or cases in real-life.
According to the EMH, stocks always trade at their fair value on stock exchanges, making it impossible for investors to either purchase undervalued stocks or sell stocks for inflated prices. As such, it should be impossible to outperform the overall market through expert stock selection or market timing, and that the only way an investor can possibly obtain higher returns is by purchasing riskier investments.
Discuss the differences between weak form, semi-strong form and strong form capital market efficiency, and critically evaluate the significance of the efficient market hypothesis (EMH) for the financial manager, using examples or cases in real-life.
According to the EMH, stocks always trade at their fair value on stock exchanges, making it impossible for investors to either purchase undervalued stocks or sell stocks for inflated prices. As such, it should be impossible to outperform the overall market through expert stock selection or market timing, and that the only way an investor can possibly obtain higher returns is by purchasing riskier investments.
Presentation on "Capital Market"
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2.function and players
3.importance/role and types
4.factor and structure
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: Security and Portfolio Analysis :Efficient market theoryRahulKaushik108
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Key Concepts of Efficient market theory: Very Lucid presentation , very Useful for MBA student to understand the Concepts of Efficient Market theory( Random walk hypotheses ) .The key idea of the hypotheses is" no one can efficiently out predict the market" or in other terms, technical analysis or fundamental analysis can not beat "the naive buy and hold strategy".
noorulhadi Lecturer at Govt College of Management Sciences, noorulhadi99@yahoo.com
i have prepared these slides and still using in mylectures, Reference: Portfolio management by S kevin and onlin
According to the EMH, stocks always trade at their fair value on stock exchanges, making it impossible for investors to either purchase undervalued stocks or sell stocks for inflated prices. As such, it should be impossible to outperform the overall market through expert stock selection or market timing, and that the only way an investor can possibly obtain higher returns is by purchasing riskier investments.
Presentation on "Capital Market"
1.definition and characteristics
2.function and players
3.importance/role and types
4.factor and structure
5.reforms and development
: Security and Portfolio Analysis :Efficient market theoryRahulKaushik108
Â
Key Concepts of Efficient market theory: Very Lucid presentation , very Useful for MBA student to understand the Concepts of Efficient Market theory( Random walk hypotheses ) .The key idea of the hypotheses is" no one can efficiently out predict the market" or in other terms, technical analysis or fundamental analysis can not beat "the naive buy and hold strategy".
noorulhadi Lecturer at Govt College of Management Sciences, noorulhadi99@yahoo.com
i have prepared these slides and still using in mylectures, Reference: Portfolio management by S kevin and onlin
According to the EMH, stocks always trade at their fair value on stock exchanges, making it impossible for investors to either purchase undervalued stocks or sell stocks for inflated prices. As such, it should be impossible to outperform the overall market through expert stock selection or market timing, and that the only way an investor can possibly obtain higher returns is by purchasing riskier investments.
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Effcient market hypothesis
1. Assignment on Efficient Market Hypothesis
Gopi Raj Adhikari
MBA Apex College
5th
trimester
Introduction
Efficient market hypothesis(EMH) is an idea partly developed in the 1960s by Eugene Fama. An
investment theory that states it is impossible to "beat the market" because stock market
efficiency causes existing share prices to always incorporate and reflect all relevant information
(investopedia.com). According to efficient market hypothesis, stocks always trade at their fair
value on stock exchanges, making it impossible for investors to either purchase undervalued
stocks or sell stocks for inflated prices. EMH is highly controversial and often disputed because
believers argue it is pointless to search for undervalued stocks or to try to predict trends in the
market through either fundamental or technical analysis. The efficient markets hypothesis
maintains that market prices fully reflect all available information. It can be predicted the market
trend using two different techniques one is fundamental and another is technical analysis
(investopedia.com). The efficient markets hypothesis (EMH) maintains that market prices fully
reflect all available information. This idea has been applied extensively to theoretical models and
empirical studies of financial securities prices, generating considerable controversy as well as
fundamental insights into the price-discovery process. The most enduring critique comes from
psychologists and behavioral economists who argue that the EMH is based on counterfactual
assumptions regarding human behavior, that is, rationality. Recent advances in evolutionary
psychology and the cognitive neurosciences may be able to reconcile the EMH with behavioral
anomalies(L. Blume and S. Durlauf, 2007).
Assumptions of Efficient Market Hypothesis:
Large numbers of participant analyze and value securities independently
Random fashion of new information regarding the securities and timing of new
announcement is generally independent of others.
2. Investors adjust security prices rapidly to reflect the effects of new information.
Value of EMH
The following are the some of the values ofEfficient Market Hypothesis.It is important for the
investors, company managers, and the government. The efficient market hypothesis refers to the
idea of whether or not investors can consistently achieve market beating returns, depending on
which form you accept. This is important for investors mostly because many investors attempt to
beat the market by using market timing (charting & technical trading techniques) and
fundamental analysis (reading annual reports & forecasting earnings, etc). The efficient market
hypothesis says that these activities are a waste of time and that an efficient market already
prices stocks at prices that already reflect all currently available information - thus making it
impossible to beat the market.
Three Level of EMH
There are 3 different types of efficient market hypothesis they are as follows.
Weak-form efficiency: It states that, future prices cannot be predicted by analyzing prices
from the past. Excess returns cannot be earned in the long run by using investment
strategies based on historical share prices or other historical data. Technical analysis does
not produce the excess return but some fundamental analysis may provide some excess
return. Share price does not have pattern to assets price (Wikipedia.com).
Semi-strong-form efficiency: According to this, security price reflects all publicly
available information i.e. economic news, political news, annual report etc. We cannot
earn no excess earning from the trading on that information. Semi structure form
efficiency implies that neither fundamental nor technical analysis can generate excess
return (Wikipedia.com).
Strong-form efficiency: according to this form of EMH, security price reflects all
information i.e. public and private information. Private informationis not disclosed by the
company and this information can earn excess return.
Evidences FOR EMH
3. Since its introduction into the financial economics literature over almost 40 years ago, the
efficient markets hypothesis has been examined extensively in numerous studies. The vast
majority of this research indicates that stock markets are indeed efficient. In this section, we
briefly discuss the evidence regarding the weak form, semi-strong form, and strong-form
versions of the efficient markets hypothesis.
The weak form of market efficiency, the random walk hypothesis implies that successive price
movements should be independent. A number of studies have attempted to test this hypothesis by
examining the correlation between the current return on a security and the return on the same
security over a previous period. A positive serial correlation indicates that higher than average
returns are likely to be followed by higher than average returns (i.e., a tendency for
continuation), while a negative serial correlation indicates that higher than average returns are
followed, on average, by lower than average returns (i.e., a tendency toward reversal). If the
random walk hypothesis were true, we would expect zero correlation. Consistent with this
theory, Fama (1965) found that the serial correlation coefficients for a sample of 30 Dow Jones
Industrial stocks, even though statistically significant, were too small to cover transaction costs
of trading. Subsequent studies have mostly found similar results, across other time periods and
other countries.
The Semi-strong Form the semi-strong form of the EMH is perhaps the most controversial, and
thus, has attracted the most attention. If a market is semi-strong form efficient, all publicly
available information is reflected in the stock price. It implies that investors should not be able to
profit consistently by trading on publicly available information
The Strong Form empirical tests of the strong-form version of the efficient markets hypothesis
have typically focused on the profitability of insider trading. If the strong-form efficiency
hypothesis is correct, then insiders should not be able to profit by trading on their
privateinformation
Evidences against EMH
Although most empirical evidence supports the weak-form and semi-strong forms of the EMH,
they have not received uniform acceptance. Many investment professionals still meet the EMH
4. with a great deal of skepticism. We will discuss some of the recent evidence against efficient
markets.
Over-reaction and Under-reaction: The efficient markets hypothesis implies that investors
react quickly and in an unbiased manner to new information.
Value versus growth: A number of investment professionals and academics argue that so called
âvalue strategiesâ are able to outperform the market consistently. Typically, value strategies
involve buying stocks that have low prices relative to their accounting âbookâ values, dividends,
or historical prices.
Small Firm Effect: He found that average returns on small stocks were too large to be justified
by the Capital Asset Pricing Model, while the average returns on large stocks were too low.
References
Clarke ClJM. Efficient Markets Hypothesis, from http://e-m-h.org/ClJM.pdf
Tanous, P, Investment Gurus, New York Institute of Finance, Englewood Cliffs,
N.J.1997.
J. Lakonishok, A. Shleifer, and R. Vishny, âContrarian Investment, Extrapolation, and
Risk,â Journal of Finance (December, 1994).
S.P. Kothari, J. Shanken, and R. G. Sloan, âAnother Look at the Cross-Section of
Expected Stock Returns,â Journal of Finance ( March, 1995)
F. Fama and K. French, âThe cross-section of expected stock returns,â Journal of Finance
(June, 1992)
Efficient Market Hypothesis.investopedia.
Efficient Market Hypothesis. (n.d) retrieved 2013/04/08, from yahoo.com Web Site:
http://answers.yahoo.com/question/index?qid=20070414202343AA778O0