they stopped it, when the ukraine-russia war began, everyone financially smart began shorting stocks of anything russian that was listed, some dudes made bank by betting big right as putin's helicopters crossed into ukraine. there was a second window of opportunity when russia decided to abort the zerg rush into kiev. a lot of trust on russian investments fell and people shorted it again, then most listings got blocked, or blocked to foreigners, idk how that works but it happened, now you have to track down specific russian industries and companies that sometimes are listed as some other slav country company but still have free falls whenever something happens.
Mexico