Gold and silver are highly conductive and small quantities are embedded in circuit boards and other hardware.

That’s the question the exchange is urgently trying to address for its flagship copper contract, which sets the global price for one of the world’s most important commodities.

During the pandemic, Trafigura has emerged as one of the most high-profile bulls in the global copper market.

The bourse in September started a link so users can trade spot gold at London prices using its own clearing system and with international banks.

It's still unclear what the impact of Europe's power crunch will be in terms of lost metal, writes Andy Home.

Traders are paying huge premiums for quickly deliverable copper after stockpiles in the LME warehouse system tumbled to their lowest level in decades.