The world’s largest palladium producer listed its nickel and copper ETCs on the London Stock Exchange and Borsa Italiana. : Nornickel, a Russian major metal producer and the world’s largest palladium producer, has announced it started to offer blockchain-based exchange-traded commodities (ETCs). These assets will be based on their metals – nickel and copper, and are set to launch on the London Stock Exchange (LSE) and Borsa Italiana.