South Africa’s rand has plunged 4.6 percent this week, the most since February, as concern mounts that Finance Minister Pravin Gordhan’s job is on the line amid speculation of a rift between him and President Jacob Zuma. Gordhan, who has pledged to contain spending and debt, is facing a police probe into allegations of irregularities at the tax authority, which he headed from 1999 to 2009. A statement of support from Zuma failed to allay investors’ anxiety.

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