After suffering a technical glitch that silenced trading on Wednesday, the Toronto Stock Exchange was back in business this morning.

The problem occurred when the system’s key data feed system—along with its backup—failed, denying traders information such as quotes, corporate actions and index data.

“I would like to apologize to our customers for the disruption that the halt in trading caused yesterday,” said Tom Kloet, chief executive officer with TMX Group, in a statement. “I would also like to assure investors that all efforts are being made to ensure that such a disruption in trading does not happen again.”

With the TSX offline, alternative trading system Pure Trading picked up the overflow, tripling it’s trading volume to 35 million shares Wednesday.