Rusal quest for value to dent Glencore's aluminium clout

Mining giant Glencore's deal to buy aluminium from Rusal will be renewed from 2019, but the tonnage is likely to be much lower as the Russian producer taps into growing demand for value-added products, two sources close to the matter said. Unless it sources from additional suppliers, the reduction in volume will weaken the leading position held for years by Swiss-based Glencore in the global aluminium market.