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FINANCIAL MARKETS DURING HIGHLY ANXIOUS TIME: MULTIFRACTAL FLUCTUATIONS IN ASSET RETURNS

FOTIOS M. SIOKIS

University of Macedonia, Egnatia str. 156, P. O. Box 1591, 540 06 Thessaloniki, Greece

https://doi.org/10.1142/S0218348X17500323Cited by:15 (Source: Crossref)

Abstract

Building on the notion that systems and in particular complex systems such as stock exchange markets reveal their structure better when they are under stress, we analyze the multifractal character and nonlinear properties of four major stock market indices during financial meltdowns by means of the multifractal detrended fluctuation analysis (MF-DFA). The three distinct financial crises under investigation are the Black Monday, the Dot-Com and the Great Recession. Scaling and Hurst exponents are derived as well as the singularity spectra. The results show that all indices exhibit strong multifractal properties. The complexity of the markets is higher under the Black Monday event revealed by the width of the singularity spectrum and the higher $α_{0}$ parameter.

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