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2007–2008 US financial crisis adversely affected the stock markets all over the world.  Asian markets also came under …
Persistent link: https://www.econbiz.de/10011117879
observe a puzzling phenomenon where an apparent increase in multifractality is measured in time series generated from shuffled … motion and Levy flights. Overall we conclude that the multifractality observed in financial time series is mainly a … measured multifractality. …
Persistent link: https://www.econbiz.de/10010591263
of these scaling exponents and the singularity spectrum f(α) show that the returns possess multifractality. By comparing … the MF-DFA results of the original series to those for the shuffled series, we find that the multifractality is due to the …
Persistent link: https://www.econbiz.de/10011062979
, On spurious and corrupted multifractality: the effects of additive noise, short- term memory and periodic trends, Physica …
Persistent link: https://www.econbiz.de/10011061088
multifractality, including physics, financial data analysis or physiology, because they allow to separate the ‘true’ multifractal …
Persistent link: https://www.econbiz.de/10011061544
definitions of volatility show that the empirical scaling law in every stock market is a power law. This power law holds from 2 to … volatility. This finding indicates that the stock returns may have a multifractal nature. …
Persistent link: https://www.econbiz.de/10010872069
In this paper, we model natural gas market volatility using GARCH-class models with long memory and fat … the stylized fact of fat-tail distributions into account. Second, we forecast volatility of basis defined as the price … detrending moving average indicate that GARCH models cannot capture multifractality in natural gas markets. This may be the …
Persistent link: https://www.econbiz.de/10010703192
Long-term memory processes have been extensively examined in recent literature as they provide simple way to test for predictability in the underlying process. However, most of the literature interprets the results of estimated Hurst exponent simply by its comparison to its asymptotic limit of...
Persistent link: https://www.econbiz.de/10005087515
We calculate the Shannon entropy of a time series by using the probability density functions of the characteristic sizes of the long-range correlated clusters introduced in [A. Carbone, G. Castelli, H.E. Stanley, Phys. Rev. E 69 (2004) 026105]. We define three different measures of the entropy...
Persistent link: https://www.econbiz.de/10010871579
Earthquakes (EQs) are large-scale fracture phenomena in the Earth’s heterogeneous crust. Fracture-induced physical fields allow a real-time monitoring of damage evolution in materials during mechanical loading. Electromagnetic (EM) emissions in a wide frequency spectrum ranging from kHz to MHz...
Persistent link: https://www.econbiz.de/10010590873