Effects of cross-border capital flows on stock returns of dual-listed firms in mainland China and Hong Kong: Evidence from a natural experiment
Funding information: Department of Education of Guangdong Province of the People's Republic of China, Grant/Award Number: 2017WTSCX008; Department of Science and Technology of Guangdong Province of the People's Republic of China, Grant/Award Numbers: 2017A030310251, 2020A1515010421; Fundamental Research Funds for the Central Universities, Grant/Award Numbers: 19JNQM18, 17JNQN011; National Natural Science Foundation of China, Grant/Award Number: 71703055
Abstract
This study analyses the effects of the Shanghai–Hong Kong Stock Market Connect policy on the price disparity between A-shares and H-shares of dual-listed companies (DLC). Using a difference-in-difference estimation method, we show that the policy decreases the relative twin cumulative abnormal returns of treated DLC by 3% and narrows the price gaps between A-shares and H-shares. We determine that the rising demand for H-shares, which are newly accessible by mainland investors, drives the price of H-shares up. By contrast, the price of A-shares remains unchanged. Further analysis reveals that cross-border capital flow is the main force of the policy.