Not that much, actually, now, given what has been done under the WTO agreement, and also through Bill C-8.
But you just don't see them opening up branches. The only one that really has a branch network is HSBC, who bought their branch network.
Other than that entry point, which possibly could happen if there was a merger proposal--there are only, I think, one or two merger combinations that are even legal under the Competition Act--it would depend on selling off a bunch of branches. That might provide another entry point.
But otherwise, no. The barriers are down. They're not coming in because the market share control and the start-up costs are too great, and those are their own--