How extremely odd. Wonder why the values haven't converged? Do people inside the country not have access to this information? What's stopping someone from buying 150 rubles for a dollar and then buying $1.40ish for those same 150 rubles?
I see, the friction is in doing the reverse transaction. I guess you could find a buyer outside the traditional markets to complete the arbitrage transactions but that's going to be risky. Thanks for the clarification.