Trading has been halted for the TSX, TSXV, and Alpha markets was halted for roughly an hour today.
TMX Group, which operates the exchanges, attributed the error to the "TSX Order Entry symbol range M-S".
As of 11:05 a.m ET, trading remained halted, but TMX Group tweeted that markets are now in a pre-open stage, with trading set to resume at 11:10 a.m ET.
Trading resumed shortly after 11:30 a.m.