Abstract.
We explore the deviations from efficiency in the returns and volatility returns of Latin-American market indices. Two different approaches are considered. The dynamics of the Hurst exponent is obtained via a wavelet rolling sample approach, quantifying the degree of long memory exhibited by the stock market indices under analysis. On the other hand, the Tsallis q entropic index is measured in order to take into account the deviations from the Gaussian hypothesis. Different dynamic rankings of inefficieny are obtained, each of them contemplates a different source of inefficiency. Comparing with the results obtained for a developed country (US), we confirm a similar degree of long-range dependence for our emerging markets. Moreover, we show that the inefficiency in the Latin-American countries comes principally from the non-Gaussian form of the probability distributions.
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Zunino, L., Tabak, B., Pérez, D. et al. Inefficiency in Latin-American market indices. Eur. Phys. J. B 60, 111–121 (2007). https://doi.org/10.1140/epjb/e2007-00316-y
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DOI: https://doi.org/10.1140/epjb/e2007-00316-y