Waupaca Foundry | PartingLINE

China dominates the production of iron-based batteries thanks to a series of key patents, which have allowed the country to make 95% of the world's lithium iron phosphate batteries.

What happens when the London Metal Exchange runs out of metal? 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.

The problem stems from the LME’s physical nature: anyone holding a contract to expiry becomes the owner of a package of metal in an LME warehouse. On the other hand, anyone who has sold one must deliver the metal when the contract expires.