Nearly 25 million tons were transacted on the ShFE alumina contract on Wednesday, a record daily high and equivalent to almost a fifth of global annual production.
A rebound in gold prices to a record peak has dashed the Indian bullion industry's expectations of a lucrative festival season after their hopes were boosted by a deep cut in import duty two months ago to the lowest in a decade.
Shares of Korea Zinc, the world's biggest refined zinc producer, have risen 13% so far this month, after a 29% surge last month, and are trading at record-high levels.