Mining giant Rio Tinto cuts key iron ore supply forecast again, shares hit
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MELBOURNE (Reuters) - Mining giant Rio Tinto Ltd on Thursday lowered its guidance on volumes of iron ore it expects to ship from the key Pilbara producing region in Australia for the third time since April, citing operational problems.The announcement, together with news late on Wednesday that Brazilian miner Vale SA will imminently restart production at a big mine in Brazil, pushed Rio's Australian shares 5% lower in early trade, in line with 4.7% losses in London. The broader Australian market..