Definition
Once CIRO lifts a trading halt under UMIR 9.1, the marketplace follows a defined reopening procedure to restore fair and orderly trading. On the TSX, a halt resumption typically involves a brief reopening auction in which new orders are collected over a period of several minutes before trading resumes continuously. This allows price discovery to occur with full participant awareness of the information that triggered the halt, rather than having the first trades occur at potentially distorted prices from stale orders. CIRO's market surveillance monitors the reopening to detect any irregular trading patterns. All orders that were entered before the halt remain in force unless the client cancels them, which means a limit order entered before a halt could execute at the resumption price if that price crosses the limit. Dealers should have protocols to contact clients with open orders when a material halt is lifted, particularly for clients with concentrated positions.
Source
UMIR 9.1; TSX Trading Rules, halt and resumption procedures; CIRO trading-halt guidance
Where this shows up on the CIRE
- Outcome 8.1