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On the higher-order moment interdependence of stock and commodity markets: A wavelet coherence analysis

Walid Ahmed ()

The Quarterly Review of Economics and Finance, 2022, vol. 83, issue C, 135-151

Abstract: This study aims to provide fresh time-frequency evidence on global equity and commodity market interdependencies, in terms of the first four moments of their respective return distributions (i.e., mean, variance, skewness, and kurtosis), using wavelet analysis techniques. The results indicate that the co-movement structure of the same-order moments of equity, gold, and energy returns tends to be both time-dependent and frequency-dependent. With respect to the equity-gold nexus, we detect substantial cross-volatility, cross-skewness, and cross-kurtosis effects at medium- and long-term time scales during the 2010–2014 turmoil, with the stock market leading the gold counterpart in most cases. From 2015 onwards, we observe a strong degree of coherence at high and medium frequencies for each of the four same-order moment pairs, but generally with zero-phase difference. The findings for the equity-energy nexus suggest significant mean and volatility co-movement over most of the sample period and across frequency bands. Additionally, cross-skewness and cross-kurtosis linkages are more pronounced at short- and medium-term horizons and, noticeably, in the wake of global downturns. Practical implications are deduced from the analysis.

Keywords: Stock markets; Commodity markets; Higher-order moments; Interdependence; Wavelet phase-difference (search for similar items in EconPapers)
JEL-codes: C32 C53 G10 Q02 (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:eee:quaeco:v:83:y:2022:i:c:p:135-151

DOI: 10.1016/j.qref.2021.12.003

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