US Economic Uncertainty and the Korean Stock Market Reaction

Jaesun Yun, Jangkoo Kang and Kyung Yoon Kwon

Emerging Markets Finance and Trade, 2021, vol. 57, issue 10, 2946-2976

Abstract: This paper examines whether US economic uncertainty is significantly priced in the Korean stock markets. Our results show that stocks highly sensitive to US economic uncertainty with positively or negatively large uncertainty betas have lower future returns. Motivated by the overpricing explanation, we suggest that these stocks are more likely to be exposed to greater divergence of opinions and thus overpriced. More importantly, we further suggest that the large proportion of retail investors which is a distinctive feature of the Korean stock markets contributes to overpricing by limiting arbitrage. Utilizing our unique intraday data, we measure limits to arbitrage with levels of retail trading, and find further supporting evidence that overpricing is significant only within stocks with high limits to arbitrage and in during high retail-sentiment period.

Date: 2021
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DOI: 10.1080/1540496X.2019.1672151

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