Since the beginning of the 21st century, the stock market has experienced many outbreaks of bull market, and stocks have gradually entered the public’s field of vision from a small investment field. In the era of big data, how can investors make correct information from a large amount of in-formation? The choice becomes the most critical issue. This paper selects 17 listed companies in the coal industry in 2018 as the research object, and uses Baidu Index as the research index of investor attention, empirically testing the impact of investment attention on the market performance of coal listed companies. The study found that: first, the current investor attention significantly affected the stock returns and liquidity of the current coal listed companies; second, the investor attention of the lag period and the current stock returns of coal listed companies were significantly negative. And the investor attention in the lag period is still significantly positively correlated with the stock liquidity of the current coal listed companies.
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