This' loss' is that the Hong Kong Stock Exchange and the Shanghai Stock Exchange withhold 3% of each transaction in order to avoid the imbalance caused by the exchange rate difference between RMB and Hong Kong dollars (that is, the loss caused by the exchange rate difference between transactions) and return it to you after the transaction is settled-the settlement of your buying operation was completed that night, and if the stock price remains unchanged, the loss will become 3% the next day.
The remaining 3% will not be returned to you until you sell the stock and complete the settlement (currently two working days).
Therefore, Hong Kong stocks generally buy stocks, which are suitable for the medium and long term, not for the short term, and the transaction cost of Hong Kong stocks is also high.