Higher-order comoment contagion among G20 equity markets during the COVID-19 pandemic*

We study the distribution of equity returns in the G20 equity markets to test for contagion following the first official report of a COVID-19 case in China in December 2019 and the subsequent announcement of a global pandemic in March 2020. We find evidence of contagion through equity market tail risk in early 2020 followed by widespread evidence of contagion across multiple channels from the U.S. to G20 equity markets after the pandemic announcement. Our results suggest that global equity markets may be exposed to unpriced pandemic risk factors with implications for portfolio diversification, risk management and financial stability.

Automated summary

The study reveals evidence of contagion in global equity markets during the COVID-19 pandemic, particularly after the official announcement. This suggests potential implications for portfolio diversification, risk management, and financial stability.