FILE--Quebec Finance Minister Raymond Bachand defends his budget during question period as Quebec Premier Jean Charest, right reads, Wednesday April 21, 2010 at the legislature in Quebec City. A single national securities regulator would cause economic harm to the province, says a Quebec-sponsored study released ahead of promised federal legislation creating the entity.The results were released Monday by Bachand and Jean St-Gelais, head of the province's securities regulator. THE CANADIAN PRESS/Jacques Boissinot