Glencore hammered in Hong Kong as global commodities slump

Shares in mining giant Glencore crashed 27.5 percent in Hong Kong Tuesday, hammered by weak commodity prices as Chinese demand stumbled while a brokerage warned about the group's future. The slump follows a near 30 percent dive in its London-listed arm and comes as an economic crisis in China convulses global markets, with stocks, commodities and emerging market currencies tumbling. Dealers were further spooked on Monday when brokerage Investec said in a research note to clients: "The challengin