Market Operations and Infrastructure Securities Market Trading Mechanism (including Pre-opening Session and Index Basket Order Trading Mechanism) Trading System - AMS/3 Clearing and Settlement Services Depository & Common Nominee Services Clearing System - CCASS/3 Introduction of Five-Digit Stock Codes Closing Auction Session Derivatives Market Trading Mechanism Trading System - HKATS Clearing and Settlement Services Clearing System - DCASS Upgrade of HKATS and DCASS to Release 19.1 System Training AMS/3 Training Course HKATS Training Course CCASS Training Course DCASS Training Course Securities and Derivatives Network (SDNet)