TSX reopens after 'connection issue' briefly halted all stock trading Tuesday

All trading was halted on the TSX on Tuesday after a connection issue placing orders for certain securities. (Brent Lewin/Bloomberg - image credit)
All trading was halted on the TSX on Tuesday after a connection issue placing orders for certain securities. (Brent Lewin/Bloomberg - image credit)

All trading on the Toronto Stock Exchange was briefly halted on Tuesday after a connection issue with placing orders for certain stocks.

Shortly after it opened, the owner of Canada's main stock index halted trading on the main exchange, the venture exchange for smaller companies and the alternative Alpha exchange, citing what it called a "connection issue with the TSX order entry symbol range M–S."

"Due to the order entry connection issue, TSX, TSXV and Alpha markets are now halted for trading," the exchange said on Twitter at around 10 a.m. ET.

Within about an hour, however, the exchange had identified and rectified the problem. The market went into pre-market trading mode at around 11 a.m., and was operating normally before noon.

It was the first system-wide outage on the TSX since early 2020, when heavy trading losses in the early days of the pandemic prompted multiple trading halts as circuit-breakers were triggered.

Prior to that, the entire TSX had not had an unplanned outage since 2018, when the exchange had a technical issue that caused it to shut down early on a Friday, and not reopen until the following Monday.