The company also confirmed its 2018 dividend policy would include a fixed dividend of $1bn and said it would reactivate idled capacity "when appropriate".
“The bitcoin’s super-high volatility is not for everyone’s taste,” said Randy Frederick, vice president of trading and derivatives with Charles Schwab & Co.
Monday, mining companies in the DRC said that proposed changes to mining code adopted by lower house of parliament would do lasting damage to investment.
November copper concentrate shipments to China hits all-time monthly high – annual iron ore imports set to easily surpass 2016's record 1 billion tonnes.