RIO has been on quite a run and as a result has joined the $100 bln market cap club today. Call options volume remains huge in the Brazilian mining name. It sure has a valuable currency to go shopping with in the mining space if it so wishes.
edit: this was for informational purposes, not a rec to buy. If it does have that valuable currency (it's stock) to go and blow it on a multi-billion dollar purchase, that may not be so wonderful for a stock that's had quite a run. But the fact of the matter is that for now, it has joined the +$100 bln club... not bad for a mining company, and one from Brazil no less.