The Toronto Stock Exchange and Montreal Exchange have shut down early for the day as a result of technical problems that erupted about 2 p.m.
The Toronto-based company that owns the exchanges announced the unusual decision through Twitter.
A spokeswoman for Toronto-based TMX Group said the company was investigating the cause of the disruption but would be confining its comments to its social media feed.
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The first tweet was sent out about 2 p.m., with two hours remaining in the normal trading day.
A later update said TMX had decided to shut down all markets for the remainder of the day and apologized for the inconvenience.
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