Holy Sailingstone !They made some large purchases of some 21 M shares in August to increase their holdings to 256,496,437 shares ranging from US$2.44 to $2.89 . Maybe some more in Sept. ?
Hope they are right and about time to protect their huge investment. and start the big push on the SP. Hard to visualize them taking a huge loss.
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By the way the $3.5 B sale on Grassberg assets is expected to be finalized around first half of 2019 so quite possibly Rio will hold tight until then.