Within the framework of surveillance activities jointly carried out by the CMB and the ISE, the netting in settlement has been removed for only certain stocks, as announced by the ISE on 21 September 2010. For such securities, cross netting shall apply. This practice aims to prevent the formation of unusual price and volume movements through trades that fail to make a real contribution to the stock market. In the future, the ISE may decide to remove the netting in settlement for stocks.