Of the ruble? You cannot exchange the ruble domestically at all anymore and before it was capped at $10k. Banks are barred completely from selling foreign currency, and businesses are required to exchange 80% of their foreign currency for rubles. Russia is also attempting to force the selling of the ruble by making certain countries pay for oil in rubles. These are demand induces and not market back trading.
As I said before, lift these and the ruble crashes but you cannot knock Russia for taking these actions either. However, they will only hold until stores of imported goods run out and the controls will fail, or theoretically should. Russia is in a race to reorganize its economy on the fly right now.
Please don’t misunderstand me as saying Russia doesn’t hVe a say in whether or not their economy goes to shit or how badly it will suffer. They certainly do. We will have to see what kind of schemes they come up with. What I will say is there is no way I would want to be holding rubles for the foreseeable future and I can’t see too many businesses or countries that would want to either.
All I'm asking you is when Russia limited buying and selling of the ruble. The date.