Definition
At approximately 3:40 PM Eastern, the TSX publishes an Imbalance Notification for any security where the projected closing auction has a buy or sell imbalance exceeding 25% of the anticipated closing volume. The notification identifies the security, the direction of the imbalance (buy or sell), and the estimated size. This gives market participants an opportunity to submit offsetting orders before the 4:00 PM close, improving price discovery and reducing the risk of a disorderly auction. UMIR's prohibition on manipulative trading (UMIR 2.2) applies: a firm cannot respond to an imbalance notification by submitting artificial orders designed to move the closing price rather than to genuinely trade. For CIRE candidates, the imbalance notification is relevant to questions about order types used in the closing auction and to best-execution obligations around ensuring clients receive fair closing-price fills.
Source
TSX Trading Rules, closing auction procedures; UMIR 2.2
Where this shows up on the CIRE
- Outcome 8.1