The Shanghai-Hong Kong Stock Connect has been running smoothly since its launch on Monday, Financial Secretary John Tsang said.
He spoke to the media at the airport last night on his return from Sydney.
When queried about the daily quota on Mainland investors buying Hong Kong stocks - which had not been filled as expected, Mr Tsang said the quota is not an index or target, but a tool for risk management.
He added that the trading level is subject to market factors.