GRINM Cites No New Data to Justify 30% Stock Rally; Shares Jump 5%
GRINM Semiconductor Materials (SHA:688432) warned investors that it experienced an abnormal stock price fluctuation in three consecutive trading days, but found no material information that could have caused the unusual movement, according to a Shanghai Stock Exchange Filing on FridayThe semiconductor company's closing price deviated by more than 30% across between July 7 and July 9.The company conducted an internal verification and found no material or significant changes in its operations that could have triggered the abnormal stock movement.The company's shares jumped 5% during the midday trade.