REC Silicon ASA (<a href="https://live.euronext.com/en/product/equities/no0010112675-xosl" target="_blank">OSL:RECSI</a>) plans to discontinue the polysilicon production activity at its Butte plant in the US state of Montana within the next six to nine months “due to the regional structural imbalance in supply and demand for electricity,” the company announced on Wednesday.