Chinalco, Rio Tinto's biggest shareholder, is widely expected to take up its full entitlement tomorrow to new shares in the mining group's $15.2bn (£9.2bn) capital raising.
Tomorrow's deadline will bring an end to lingering uncertainty over Chinalco's intentions, which has persisted since the beginning of the month, when Rio's board turned its back on a $19.5bn capital injection from Chinalco that would have increased the Chinese group's stake to close to 19 per cent.
The dual-listed mining group instead opted to raise $15.2bn from existing shareholders and sign an iron ore joint venture with BHP Billiton.
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