Investigation of the effect of global EPU spillovers on country-level stock market idiosyncratic volatility

Mustafa O. Caglayan, Yuting Gong and Wenjun Xue

The European Journal of Finance, 2024, vol. 30, issue 11, 1212-1238

Abstract: Using the multivariate quantile model, this paper develops a global economic policy uncertainty (EPU) spillover measure for each country and investigates the spillover effects on the country-level stock market idiosyncratic volatility across a sample of 23 economies. The regression results show that global EPU spillovers have a positive and significant effect on the country-level stock market idiosyncratic volatility. We find that the effect of developed-market-generated EPU spillovers on the country-level stock market idiosyncratic risk is noticeably larger compared to the effect of emerging-market-generated EPU spillovers. Furthermore, the significant and positive effect of the EPU spillovers on the country-level stock market idiosyncratic volatility continues when we utilize various economic, financial, and political risk factors as controls, as well as when we use alternative measures of stock market idiosyncratic volatility as the dependent variable in our regression analyses.

Date: 2024
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DOI: 10.1080/1351847X.2023.2279141

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