A system and method for providing a market on-close operation for a market is provided. Buy orders and sell orders for tradeable assets are obtained. A time of market close is obtained. A respective buy order is matched to a respective sell order, but without a price. The respective order quantity match is locked-in without a price. A close price for the tradeable asset in the given primary market is obtained and the quantity match is executed. A fill message is transmitted to the respective buyer and the respective seller with the quantity matched and the close price for the tradeable asset.