Prisen på kobber har steget med 70 prosent på 2 år.
The price of copper ended 2017 near a four-year high of $7,260 per tonne (ca. 60 000 kr/tonn) extending the bull run in the red metal for a second year, skriver mining.com.
Measured from its multi-year lows struck at the beginning of 2016, copper has gained more than 70% in value.
Les hele saken.