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Joint multifractality in the cross-correlations between grains \& oilseeds indices and external uncertainties

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  • Ying-Hui Shao
  • Xing-Lu Gao
  • Yan-Hong Yang
  • Wei-Xing Zhou

Abstract

This study investigates the relationships between agricultural spot markets and external uncertainties via the multifractal detrending moving-average cross-correlation analysis (MF-X-DMA). The dataset contains the Grains \& Oilseeds Index (GOI) and its five sub-indices of wheat, maize, soyabeans, rice, and barley. Moreover, we use three uncertainty proxies, namely, economic policy uncertainty (EPU), geopolitical risk (GPR), and volatility Index (VIX). We observe the presence of multifractal cross-correlations between agricultural markets and uncertainties. Further, statistical tests show that maize has intrinsic joint multifractality with all the uncertainty proxies, exhibiting a high degree of sensitivity. Additionally, intrinsic multifractality among GOI-GPR, wheat-GPR and soyabeans-VIX is illustrated. However, other series have apparent multifractal cross-correlations with high possibilities. Moreover, our analysis suggests that among the three kinds of external uncertainties, geopolitical risk has a relatively stronger association with grain prices.

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  • Ying-Hui Shao & Xing-Lu Gao & Yan-Hong Yang & Wei-Xing Zhou, 2024. "Joint multifractality in the cross-correlations between grains \& oilseeds indices and external uncertainties," Papers 2410.02798, arXiv.org.
    • Handle: RePEc:arx:papers:2410.02798
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