The upgraded system supports a higher order throughput and improves order execution, the update of prices and the response time for order input, particularly at market opening.
The $25 million project was rolled out following an extensive series of testing, including market rehearsals with Exchange Participants.
"The upgrade is part of our commitment to improving market infrastructure and ensuring the highest standards of system performance," said HKEx Chief ExecutivePaul Chow. "I am confident that more efficient trade execution will better serve both Exchange Participants and investors," Mr Chow added.