Glencore is said to mull buying back Gupta-linked coal mine

Glencore is considering a bid for the Optimum coal operations in South Africa, which it sold in 2015 to a company part-owned by the politically connected Gupta family, according to two people familiar with the matter. Optimum supplies fuel to state power utility Eskom Holdings and became a lightning rod issue for critics of the Gupta family members and their friendship with former president Jacob Zuma.