Copper closed up almost 2% on the London Metal Exchange to US$9,771 per tonne yesterday.
Marex Spectron's Alastair Munro said copper was at levels last seen in 2011, the year copper reached an all-time high of $10,190/t.
Copper major Freeport-McMoRan is trading near a multi-year high, closing up 6.87% in New York after last week reporting strong March quarter results.
In London, Antofagasta gained 4.3% in London and Glencore rose 3.36%.
Barrick Gold closed down 0.9% in Toronto, with gold worth about $1,780 an ounce on the spot market.
Also in Toronto, Roxgold rose 15.1% on news of its circa C$1.1 billion acquisition by Fortuna Silver Mines.
Fortuna closed down 18%.
The Johannesburg Stock Exchange is closed today for Freedom Day.
Finally, market futures were mostly positive at the time of writing.