This paper selects a total of 60 time data points from January 2015 to December 2019, and in order to ensure the validity and rationality of the price-earnings ratio, excludes the listed companies with losses and missing relevant data in the time range, and finally selects a total of 84 stocks in Shanghai and Shenzhen (according to Shenwan industry classification), 40 stocks in the Hong Kong stock market (according to the Hong Kong Stock Exchange classification), and the monthly average of its price-earnings ratio and other influencing factors as an effective sample, a total of 5,938 5 data samples. Conduct empirical analysis. The data in this paper is mainly derived from the Eastern Wealth Choice Financial Terminal.
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