Exactly why are Rio Tinto plc & BHP Billiton plc up 20% after Brexit?

At first blush, you might wonder why investors in an international mining giant like Rio Tinto (LSE: RIO) or BHP Billiton (LSE: BLT) whose critical operations are in Australia would give two hoots about the UK’s decision to leave the European Union…

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Owain Bennallack owns shares of BHP Billiton. The Motley Fool UK has recommended Rio Tinto. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors.