ganfeng lithium co shares were sharply lower on monday after the chinese metal producer and processor said it has received regulatory notice that a case had been filed against it the companys hong konglisted stock lost as much as 87 within an hour of trading while its shenzhentraded shares dropped 71 losses narrowed later on with shares in hong kong and shenzhen down 30 and 18 respectively ganfeng lithium said in a weekend filing that it had received notice from chinas top market regulator on friday saying that it decided to file a case against the company earlier this year on suspicion of ashare insider trading ganfeng said the china securities regulatory commissions case wouldnt affect its normal production and business activities and that the company will actively cooperate with the relevant work of the regulator