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An efficient market generates categories of events that individually suggests that prices over-react to information.

The different degree of efficiency on stock markets are: strong, weak, and semi-strong.

An effective hypothesis used is random walk, this suggests that the stock market cannot be predicted from past activity meaning they believe stocks are random and unpredictable.

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(Bagel) Markets are efficient according to recent studies (articles from moodle). Investors are rational most of the time and semi-strong efficiency dominates the market. However, over-reaction and or under-reaction to information can cause anomalies in the market which contradicts the EMH due to reflect a irrational behaviour from investors. Nevertheless, those anomalies tend to go way in a long term.

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(Bagel) Markets are efficient according to recent studies (articles from moodle). Investors are rational most of the time and semi-strong efficiency dominates the market. However, over-reaction and or under-reaction to information can cause anomalies in the market which contradicts the EMH due to reflect a irrational behaviour from investors. Nevertheless, those anomalies tend to go way in a long term.

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The Efficient Market Hypothesis (Skylanders)

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The Efficient Market Hypothesis (Skylanders)

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It suggests that you cannot beat the market due to the fact that share prices reflect all information available. Based on this one person should not have more information than anyone else and should have no advantage over the market.

The opposite argument to this is that a strong market is never achievable because past,present and private information is required and this is illegal due it being unfair. E.g. if you worked for a company you would have private information this could be used for things such as insider trading.

In addition to this it has been found that days of the week, seasons, times of the day affects rationality and therefore effects the efficiency of the markets. This leads to behavioural finance that highlights things such as human error and cognitive errors suggesting that we are not good at decision making

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Present the evidence you found on efficiency of stock markets. Evidence for and against market efficiency with a supported conclusion.

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Present the evidence you found on efficiency of stock markets. Evidence for and against market efficiency with a supported conclusion.