ACB trades at higher price on TSX Alpha Exchange While ACB closed at 6.09 on the TSX Friday, it closed moderately higher on the TSX Alpha exchange ($6.15) and reached 6.28 per share in extended trading. I am not sure why this is the case. I do know that this exchange is used for institutional and high volume trades, but why the large discrepancy in closing price between the two? Does anyone know?