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Title Long memory and data frequency in financial markets
Authors Caporale, G.M.
Gil-Alana, L.
Plastun, Oleksii Leonidovych  
Keywords persistence
long memory
fractional integration
R/S analysis
Type Article
Date of Issue 2019
URI http://essuir.sumdu.edu.ua/handle/123456789/75266
Publisher Taylor and Francis
License
Citation Caporale, G.M. Long memory and data frequency in financial markets / G.M. Caporale, L. Gil-Alana, A. Plastun // Journal of Statistical Computation and Simulation, 2019. - Vol. 89. - Issue 10. - P. 1763-1779. - DOI: 10.1080/00949655.2019.1599377.
Abstract This paper investigates persistence in financial time series at three different frequencies (daily, weekly and monthly). The analysis is carried out for various financial markets (stock markets, FOREX, commodity markets) over the period from 2000 to 2016 using two different long memory approaches (R/S analysis and fractional integration) for robustness purposes. The results indicate that persistence is higher at lower frequencies, for both returns and their volatility. This is true of the stock markets (both developed and emerging) and partially of the FOREX and commodity markets examined. Such evidence against the random walk behaviour implies predictability and is inconsistent with the Efficient Market Hypothesis (EMH), since abnormal profits can be made using trading strategies based on trend analysis.
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