The Government published in The Gazette the “Revenue (Stamp Duty) Bill 2021“ (the “Bill”) on 5 March 2021, and on 2 June 2021 second and third readings have been passed by the Legislative Council, confirming that the Bill, will come into effect on 1 August 2021. Under the Bill, along with other amendments, the rate of Stamp Duty payable on contract notes for the sale or purchase of Hong Kong stocks (not being jobbing business) will be increased from 0.1% to 0.13%, as a percentage of transaction value (“stamp duty increase”).

For details, please refer to the Government Press Release and the Bill.
https://www.info.gov.hk/gia/general/202103/05/P2021030500248.htm