GRINM Semiconductor Materials Flags Unusual Stock Movement; Shares Down 8%

GRINM Semiconductor Materials (SHA:688432) said it experienced unusual stock price fluctuations in three trading days, but found no significant changes that could have caused the fluctuations, according to a Shanghai bourse filing on Friday. The semiconductor company's shares' cumulative deviations exceeded 30% between June 30 and July 2. The company's internal probe found that its operations remain normal and there are no material changes in its internal or external operations. The company's shares slumped 8% during the morning trade Friday.