Nov. 4 (Bloomberg) -- Anglo American Plc, the largest investor in South African mining, rallied the most in more than a week after saying it agreed to buy the Oppenheimer family’s 40 percent stake in De Beers, supplier of about a third of the world’s rough diamonds, for $5.1 billion.

The stock advanced 2.5 percent, the most since Oct. 27, to 303 rand by 9:12 a.m. in Johannesburg.

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