Tuesday, September 16, 2025

TSX Halted for Rest of Day due to Issue with Order Entry

This afternoon the TMX Group (TSX: X) announced they have halted the exchange for the rest of the day with a series of Tweets.

The thread:

UPDATE 1: TMX continues to investigate the problem with order entry on TSX and TSX ALPHA. Update to follow.

UPDATE 2: A technical halt has been declared on TSX, TSXV & TSX Alpha. In order to allow Participants to manage their orders, the market will remain in a Pre-Open state until further notice. Once an Opening Time has been determined a further update will be issued.

UPDATE 3: Clients are currently unable to enter, modify or cancel open orders on TSX, TSXV and Alpha. TMX continues to investigate the problem with order entry. Prior to re-opening, we will provide sufficient time in a pre-open state for Participants to manage their orders.

UPDATE 4: TMX continues to investigate the problem with order entry on TSX, TSXV and Alpha. We apologize for the inconvenience. Further updates will be provided.

UPDATE 5: TMX continues to investigate the problem with order entry on TSX, TSXV and Alpha. We apologize for the inconvenience. Further updates will be provided.

UPDATE 6: The technical halt will remain in effect for the remainder of the day on TSX, TSX Venture and TSX Alpha. As a result, the TSX Market on Close Facility will not run today. We apologize for the inconvenience.

The Montreal Exchange has also placed a halt on trading.

At the time of publishing, the TSX Ventures is down 4.58% and the S&P/TSX Composite index is down 1.90% on the day.


Information for this briefing was found via the TMX Group Twitter account. The author has no securities or affiliations related to this organization. Not a recommendation to buy or sell. Always do additional research and consult a professional before purchasing a security. The author holds no licenses.

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