A month after launching the SMO the Ruble was up 45%.

I remember when the Russian government declared that all energy purchases had to be paid in the Russian currency. In an attempt to ridicule the Russian government the news anchor on Norwegian public television said: "..., but there aren't that many Rubles in circulation."

That begs the following supply and demand question: What happens to something that has a limited supply and an unlimited demand?

Why, it skyrockets in price, of course.