An increasingly precious metal

SQM, Chile’s biggest lithium producer, is the kind of company you might find in an industrial-espionage thriller. Its headquarters in the military district of Santiago bears no name. The man who for years ran the business, Julio Ponce, is the former son-in-law of the late dictator, Augusto Pinochet. He quit as chairman in 2015, during an investigation into SQM for alleged tax evasion. (The company is co-operating with the inquiry.) Last month it emerged that CITIC, a Chinese state-controlled firm, may bid for part of Mr Ponce’s controlling stake in SQM, as part of China’s bid to secure supplies of a vital raw material.