Abstract
Efficient market theory states that financial markets can process information instantly. Empirical observations have challenged the stricter form of the efficient market hypothesis (EMH). These empirical observations and theoretical considerations show that price changes are difficult to predict if one starts from the time series of price changes. This paper provides an explanation in terms of algorithmic complexity theory of Kolmogorov that makes a clearer connection between the efficient market hypothesis and the unpredictable character of stock returns.
Keywords
- Martingales Search this journal for Martingales (opens in a new tab)
- Martingales Difference Sequence Search this journal for Martingales Difference Sequence (opens in a new tab)
- Shannon’s Information Theory Search this journal for Shannon’s Information Theory (opens in a new tab)
- Algorithmic Complexity Theory Search this journal for Algorithmic Complexity Theory (opens in a new tab)
- Efficient Market Hypothesis Search this journal for Efficient Market Hypothesis (opens in a new tab)
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Copyright (c) 2011 Amaresh Das (Author)

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Keywords
- Martingales Search this journal for Martingales (opens in a new tab)
- Martingales Difference Sequence Search this journal for Martingales Difference Sequence (opens in a new tab)
- Shannon’s Information Theory Search this journal for Shannon’s Information Theory (opens in a new tab)
- Algorithmic Complexity Theory Search this journal for Algorithmic Complexity Theory (opens in a new tab)
- Efficient Market Hypothesis Search this journal for Efficient Market Hypothesis (opens in a new tab)
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Vol. 2 No. 6 (2011)
Leadership, Capital Markets & Digital Enterprise
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