A revised pre-open session framework is now in effect. Investors have a limited time to place certain orders. From the start of the session, there is a brief window during which both types of orders can be placed. This window closes after a few minutes, and then only one type of order is accepted.

Further details about the revised framework are available. The changes affect how orders are entered and matched.

The revised framework has specific rules about which types of orders can be placed at different times during the pre-open session.