KAZAN, Russia, Sept 22 (Reuters) - The head of the supervisory board of Russia's leading stock exchange said on Thursday the group does not rule out spinning off and selling its dollar-rouble currency trading operations as a separate business.

Speaking at a banking conference in the Russian city of Kazan, Moscow Exchange's Sergey Shvetsov said the option was under consideration as part of how the bourse could respond to Western sanctions. (Reporting by Reuters Editing by Mark Potter)