Stock price reactions to reopening announcements after China abolished its zero-COVID policy

Zheng Chang (), Alex Wei Fung Ng, Siying Peng and Dandi Shi
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Zheng Chang: BNU-HKBU United International College
Alex Wei Fung Ng: Thompson Rivers University
Siying Peng: London School of Economics and Political Science
Dandi Shi: The University of Edinburgh

Palgrave Communications, 2024, vol. 11, issue 1, 1-9

Abstract: Abstract As global economies strive for post-COVID recovery, stock market reactions to reopening announcements have become crucial indicators. Though previous research has extensively focused on COVID’s detrimental impact on stock markets, the effects of reopening remain underexplored. This study provides the first causal analysis of the effect of easing restrictions on Chinese firms’ stock prices following the end of China’s three-year Zero-COVID policy. Utilizing regression-discontinuity design, we find that most relaxed measures had minimal or negative impact. However, stock prices jumped 1.4% immediately after the full reopening announcement on December 26, 2022. Using a difference-in-differences approach, we also note a 1.6% increase in the stock prices of Mainland China firms relative to firms in other districts on the Hong Kong stock market two months post-reopening. Our findings offer key insights for policymakers and contribute significantly to academic discourse on the causal relationship between reopening policies and stock market performance.

Date: 2024
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DOI: 10.1057/s41599-023-02589-8

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