Call auction pre-open session: unmatched market orders matched at last traded price or shifted to normal market accordingly. Where an equilibrium price is not discovered in the pre-open call auction, if only market orders exist they shall be matched at the last traded price and unmatched orders moved to the normal market order book at that price following price time priority, with the last traded price as the opening price. If no market orders exist, all unmatched orders shall be shifted to the normal market order book following price time priority, and the price of the first trade in the normal market shall be the opening price.