The value of the gold bars in central bank vaults fell to $4.62 billion, down 18.5% from $5.67 billion dollars at the end of 2018 - the lowest in 75 years.
Africa's No. 2 copper producer increased its sliding scale for royalties of 4 to 6% by 1.5 percentage points and introduced a new 10% tax when the price of copper exceeds $7,500 per tonne.