Based on high-frequency firm-level data, this paper uncovers new empirical patterns on intraday momentum in China. First, there exists a strong intraday momentum effect at the firm level. Second, the intraday predictability stems mainly from the overnight component rather than the opening half-hour component, which is consistent with the microstructure features of the Chinese market. Third, the intraday predictability attenuates (strengthens) following large positive (negative) informational shocks, implying a striking asymmetric reaction by market participants. Finally, we document that late-informed traders are relatively less experienced or skilful. Overall, the empirical results lend support to the model of late-informed trading.
Using a database of five successive short‐selling ban lifts in the Chinese stock market, we find that the stock price efficiency gradually changes. Specifically, the price efficiency of stocks that can be shorted later improves more than the price efficiency of stocks that can be shorted earlier. Two hypotheses are tested to explain the gradual changed price efficiency: the private information hypothesis and the analysis capability hypothesis. We further show that short selling is more associated with private information than with public information and that the relationship grows stronger after each ban lift, which supports the private information hypothesis.
This paper studies the influence of institutional ownership on the Chinese A‐shares' ESG performance. Findings reveal the positive improvement from institutional investors, and this impact is stronger in firms with better‐expected ESG performance and low initial ESG performance. Besides, heterogeneous institutional investors have different influences, and only a pressure‐resistant institution plays the promotion role. Further studies based on the period following the financial crisis and when emphasising the environmental protection policy reveal that financial motivation and reputation motivation could be the reason for institutional holding. Our findings are robust after using the instrumental variable analysis, controlling for firm fixed effects, and replacing institutional holdings, and could be beneficial for the governance of firms in China.
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