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An examination of foreign exchange market efficiency hypothesis: a case study of iran
Rasekhi Saeed,Shahrazi Mahdi +1 more
- Vol. 19, Iss: 4, pp 119-139
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TLDR
In this paper, the authors examined the efficient market hypothesis in Iranian foreign exchange market during time period 21:03:2002-17:06:2010 by using Detrended Fluctuation Analysis (DFA) technique as well as unit root tests including Augmented Dickey Fuller (ADF) and Philips-Peron (PP).Abstract:
According to Efficient Market Hypothesis (EMH) prices completely reflect all available information. Under this condition, it is not possible to speculators to predict the future behavior of asset prices and to earn excess profits in a systematic manner. This study examines efficient market hypothesis in Iranian foreign exchange market during time period 21:03:2002-17:06:2010 by using Detrended Fluctuation Analysis (DFA) technique as well as unit root tests including Augmented Dickey Fuller (ADF) and Philips-Peron (PP). Results indicate that the market was weakly efficient during the selected time period. However, it seems that this efficiency is not due to informed behavior of traders but foreign exchange interventions under managed floating regime. In case that the government adopts floating exchange rate regime in the future, prominent acting of the informed speculators and making depth of the foreign exchange market may prevent dramatic foreign exchange market inefficiency and its consequences.read more
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R/S analysis and DFA: finite sample properties and confidence intervals
TL;DR: In this paper, the authors focus on finite sample properties of two mostly used methods of Hurst exponent H estimation, R/S analysis and DFA, and show on the random time series with lengths from 2^9 to 2^17, they remain very close to the estimates proposed by Anis & Lloyd and the estimated standard deviations are lower than the ones of DFA.
References
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Journal ArticleDOI
Efficient capital markets: a review of theory and empirical work*
TL;DR: Efficient Capital Markets: A Review of Theory and Empirical Work Author(s): Eugene Fama Source: The Journal of Finance, Vol. 25, No. 2, Papers and Proceedings of the Twenty-Eighth Annual Meeting of the American Finance Association New York, N.Y. December, 28-30, 1969 (May, 1970), pp. 383-417 as mentioned in this paper
Journal ArticleDOI
Mosaic organization of DNA nucleotides
Chung-Kang Peng,Chung-Kang Peng,Chung-Kang Peng,Sergey V. Buldyrev,Sergey V. Buldyrev,Sergey V. Buldyrev,Shlomo Havlin,Shlomo Havlin,Shlomo Havlin,Michael Simons,Michael Simons,Michael Simons,H. E. Stanley,H. E. Stanley,H. E. Stanley,Ary L. Goldberger,Ary L. Goldberger,Ary L. Goldberger +17 more
TL;DR: This work analyzes two classes of controls consisting of patchy nucleotide sequences generated by different algorithms--one without and one with long-range power-law correlations, finding that both types of sequences are quantitatively distinguishable by an alternative fluctuation analysis method.
Journal ArticleDOI
The Efficient Market Hypothesis and Its Critics
TL;DR: The idea of a "random walk" was first proposed by Fama as discussed by the authors, who argued that if the flow of information is unimpeded and information is immediately ree ected in stock prices, then tomorrow's price change will re- ect only tomorrow's news and will be independent of the price changes today.
Journal ArticleDOI
Effect of trends on detrended fluctuation analysis.
TL;DR: It is shown how to use DFA appropriately to minimize the effects of trends, how to recognize if a crossover indicates indeed a transition from one type to a different type of underlying correlation, or if the crossover is due to a trend without any transition in the dynamical properties of the noise.
Journal ArticleDOI
Corporate Bond Market Transaction Costs and Transparency
TL;DR: In this paper, the authors used a complete record of U.S. over-the-counter (OTC) secondary trades in corporate bonds to estimate average transaction costs as a function of trade size for each bond that traded more than nine times between January 2003 and January 2005.
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