A method for performing an auction implemented via an exchange computer system includes receiving, from a user device, a security transaction order, receiving a first matching order, initiating a delay timer that runs for a first period of time, initiating an auction timer that runs for a second period of time, determining that the first period of time has expired, notifying a plurality of market participants of an auction, receiving, during the second period of time, one or more additional matching orders, wherein each of the one or more additional matching orders includes a request for participation in the auction, determining that the second period of time has expired, and facilitating a transaction based on the security transaction order.