Xiamen Tungsten (SHA:600549) experienced an abnormal stock fluctuation for three consecutive trading days, but its operations remain normal, according to a Shanghai bourse filing on Friday.
The company's closing stock price between June 2 and June 4 was more than 20%, exceeding the bourse's threshold.
The company's probe found that it does not have a significant disclosure that could affect its stock movement.
The Chinese tungsten carbide manufacturer's shares rose 1% during morning trade.