Research on the impact of policy events on volatility of Chinese stock market 并列题名:Research on the impact of policy events on volatility of Chinese stock market Research on the risk impact of insurance companies' investment in Chinese stock market Research on the influence of air pollution on Chinese stock market 并列题名:Research on the risk impact of insurance companies' investment in Chinese stock market Research on the mechanism of anti manipulation in the stock market 并列题名:Research on the influence of air pollution on Chinese stock market Research on the impact of the internet on labor market Research on funds operation in Chinese stock market Research on the microstructure of Hongkong stock market