https://www.hkex.com.hk/Services/RSS-Feeds/The-SEHK-Options-Clearing-House-Limited?sc_lang=enParticipant Circulars - The SEHK Options Clearing House Limited RSSen{0D740B1E-8D86-4B26-91FD-832E3B6A1E92}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_172_2026Jul03163330?sc_lang=enCollateral Haircut AdjustmentFri, 03 Jul 2026 16:56:15 +0800{D6B9605C-1E4A-40EE-851B-CD4DDA9EF4B9}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_167_2026Jul02133000?sc_lang=enSEOCH Reserve Fund Variable ContributionsThu, 02 Jul 2026 13:32:45 +0800{AE81D8E7-143B-4B9D-9AD9-210145015657}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/20260630_MSM_008_2026?sc_lang=enCompliance Bulletin (Issue No. 18) - (1) Hong Kong Investor Identification Regime (“HKIDR”) – (i) Input Format for BCAN Tagging; and (ii) Client Type Classification in BCAN-CID Mapping File; (2) Stock Connect Northbound BCAN Requirements; (3) Guidance on Controls on Large or Highly Leveraged Orders and Trades; and (4) Dealings with Suspended Exchange Participants Tue, 30 Jun 2026 17:58:24 +0800{0CFB962C-461A-4C15-9729-CC29F9662001}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/20260624_CLR_DCASS_059_2026?sc_lang=enAdjustment to Display of Underlying Closing Prices of Stock Options in DCASS and Specified Reports - UpdateWed, 24 Jun 2026 16:47:51 +0800{C4BC9023-F83E-42C9-98C8-BB8E1D52F473}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/20260623_MSM_007_2026?sc_lang=enREMINDER - 2026 Annual Attestation and Inspection Programme - Self-attestation of Compliance QuestionnaireTue, 23 Jun 2026 14:20:50 +0800{A8FEC835-A5B2-4EBA-AC6A-833608457264}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/GRM_FRM_003-SEOCH-Revision-to-CMM-Framework?sc_lang=enMinimum Client Margin Requirements for Stock Options ProductsMon, 22 Jun 2026 17:39:55 +0800{B631A392-596C-40BC-B380-AC73BE4CB3AC}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_160_2026Jun16114500?sc_lang=enVolatility Scan Range Update for Weekly Stock OptionsTue, 16 Jun 2026 12:41:02 +0800{D059E855-0536-499A-A43E-AE356AEA7E6C}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_156_2026Jun10173303?sc_lang=enVolatility Scan Range Update for Weekly Stock OptionsWed, 10 Jun 2026 17:43:55 +0800{FC7E57AA-CF4E-47F0-B009-2E5152DD54E4}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_150_2026Jun03140315?sc_lang=enStock Collateral HaircutWed, 03 Jun 2026 14:13:59 +0800{F450D866-1CEB-41BD-97CA-6BA9AB5B238A}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/20260602_MSM_006_2026?sc_lang=en2026 Annual Attestation and Inspection Programme - Self-attestation of Compliance QuestionnaireTue, 02 Jun 2026 19:08:25 +0800{8B4C6EE1-EB90-4B8C-BDCD-86337115BEDF}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_148_2026Jun02160316?sc_lang=enCollateral Haircut AdjustmentTue, 02 Jun 2026 16:46:18 +0800{26CCF21F-6C24-4F3E-9BF4-C0485077CF26}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_142_2026Jun01133000?sc_lang=enSEOCH Reserve Fund Variable ContributionsMon, 01 Jun 2026 13:23:57 +0800{844CD2CC-DE3F-4A3E-BF02-73E0CA055CD5}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/20260529_CLR_056?sc_lang=enRescheduling of Adjustment to Display of Underlying Closing Prices of Stock Options in DCASS and Specified ReportsFri, 29 May 2026 16:30:30 +0800{7451A5B1-7DEE-4BB5-986F-E979766792BF}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/20260604_CLR_SEOCH_055?sc_lang=enInstallation of Google Chrome Browser for DCASS OnlineThu, 28 May 2026 17:18:54 +0800{2518C619-B1AD-493F-992D-BEBF72195EBF}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_136_2026May18180257?sc_lang=enStandardization of Date Format in DCASS Risk Management Reports (including Risk Parameter Files)<br/>Mon, 18 May 2026 19:51:19 +0800{C3C9E261-343D-4FF9-96B4-63B3771E2BB9}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/2026_CLR_SEOCH_051?sc_lang=enAdjustment to Display of Underlying Closing Prices of Stock Options in DCASS and Specified ReportsFri, 08 May 2026 17:55:29 +0800{4B298CAD-0C73-49D0-B9FB-A8DBB77DEACB}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_132_2026May05180257?sc_lang=enCollateral Haircut AdjustmentTue, 05 May 2026 18:24:40 +0800{34FDE847-7A87-46C6-86D4-9037701054AA}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_130_2026May04133000?sc_lang=enSEOCH Reserve Fund Variable ContributionsMon, 04 May 2026 12:19:33 +0800{D3CF7280-F5AB-48E4-8CA1-E06024B271B8}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_126_2026Apr29163257?sc_lang=enVolatility Scan Range UpdateWed, 29 Apr 2026 16:54:09 +0800{181F5879-F81A-4E43-97EC-E1700E242ED8}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/20260427_CLR_DCASS_050_2026?sc_lang=enDownload and Upgrade of Google Chrome Browser for DCASS OnlineMon, 27 Apr 2026 17:02:46 +0800{2EBA2E82-640D-4B72-BDA3-FAEB184AD87C}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/20260417_LSD_017_2026?sc_lang=enAmendments to the Options Clearing Rules and the Operational Clearing Procedures for Options Trading Exchange Participants of The SEHK Options Clearing House Limited Fri, 17 Apr 2026 16:38:39 +0800{3CB306A8-DA08-4910-8D6D-58264F825233}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_116_2026Apr02160313?sc_lang=enCollateral Haircut AdjustmentThu, 02 Apr 2026 16:36:17 +0800{FB4BCBFA-4A4A-4061-908F-B45975D2AE26}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/20260401_MSM_005_2026?sc_lang=en2026 Annual Attestation and Inspection ProgrammeWed, 01 Apr 2026 18:43:42 +0800{7DC5E2CB-8025-4977-842D-995BC5DCB61F}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/20260401_CLR_DCASS_044_2026?sc_lang=enOrion Derivatives Platform: Upcoming Town HallWed, 01 Apr 2026 18:18:03 +0800{077834E4-A204-469E-9B9C-3270E57EA822}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_109_2026Apr01133000?sc_lang=enSEOCH Reserve Fund Variable ContributionsWed, 01 Apr 2026 13:03:19 +0800{3291A998-A4F4-4080-9EB2-CF7BBB8A3163}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/20260331_MSM_003_2026?sc_lang=enCompliance Bulletin (Issue No. 17) - (1) Reminder on Large Open Position (“LOP”) Reporting Requirements for Positions Held or Controlled Through Multiple Brokers; (2) Dealings with Suspended Exchange Participants; and (3) Closing of the 2025 Annual Attestation and Inspection ProgrammeTue, 31 Mar 2026 22:05:30 +0800{335DC94D-9A9B-481F-820A-BE5888C90F3F}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/20260331_MSM_002_2026?sc_lang=enClosing of 2025 Annual Attestation and Inspection ProgrammeTue, 31 Mar 2026 21:39:19 +0800{7926EAF8-ADA1-4701-AB14-73657D2AE774}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_CM2_042_2026Mar31170305?sc_lang=enRedelivery of surplus cash balance in Hong Kong dollars in a SEOCH Participant’s CCMS Collateral AccountTue, 31 Mar 2026 17:24:17 +0800{504BD243-5614-428F-ADD3-FD208D5B6EFF}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_103_2026Mar27180301?sc_lang=enRisk Management Arrangements in respect of the Ching Ming Festival and Easter Holidays – ReminderFri, 27 Mar 2026 18:27:28 +0800{81236074-20EC-440D-9E9B-E5A0703081A0}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_093_2026Mar20160320?sc_lang=enRisk Management Arrangements in respect of the Ching Ming Festival and Easter HolidaysFri, 20 Mar 2026 16:24:30 +0800{D5E3F7AE-2997-427E-B6A7-F09DFB12F733}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_090_2026Mar20113251?sc_lang=enReminder on Payment Obligations of Clearing ParticipantsFri, 20 Mar 2026 11:54:42 +0800{312238C2-2FCA-4772-ADE2-2E573536E2B8}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_OEC_036_2026?sc_lang=enReminder: SFTP Facilities Upgrade for the Report Access PlatformFri, 13 Mar 2026 18:21:13 +0800{EF7056C6-6F4C-492D-A342-CEB2F9025320}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_GRM_QRM_001_2026?sc_lang=enReserve Fund ThresholdWed, 04 Mar 2026 17:47:44 +0800{52496734-E9CD-4497-BC85-CE1BD5846143}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_071_2026Mar04160305?sc_lang=enStock Collateral HaircutWed, 04 Mar 2026 16:25:50 +0800{2BBD50D8-2253-468F-86F0-DA7F2CE55A7E}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/20260303_CLR_SEOCH_034?sc_lang=enRollout of HKATS and DCASS Operating System UpgradeWed, 04 Mar 2026 11:26:16 +0800{BD8362D1-40E9-4C40-A636-6404C49B5987}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_068_2026Mar03160325?sc_lang=enCollateral Haircut AdjustmentTue, 03 Mar 2026 18:36:17 +0800{F1391CB4-C148-41F0-B061-68E370D1B3D7}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_062_2026Mar02133000?sc_lang=enSEOCH Reserve Fund Variable ContributionsMon, 02 Mar 2026 12:46:51 +0800{FB2FF6B3-0CD0-4F25-B45A-36B38E902F20}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/20260210_CDCO_DCASS_026_2026?sc_lang=enMarket Readiness for the Introduction of Additional Market Codes for Stock Option Contracts of New UnderlyingTue, 10 Feb 2026 21:15:44 +0800{9F25E578-5C7A-4CA6-BD89-DBA667B38905}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_049_2026Feb10170304?sc_lang=enRisk Management Arrangements in respect of the Lunar New Year Holidays – ReminderTue, 10 Feb 2026 17:25:49 +0800{7D0FCA1A-2FAA-4269-BACA-E9E361DF816D}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/20260208_CLR_SEOCH_024?sc_lang=enUpdates on HKATS and DCASS Operating System UpgradeSun, 08 Feb 2026 16:54:47 +0800{22A5E491-8049-45DE-8E92-88EA5C72B808}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_039_2026Feb03160325?sc_lang=enCollateral Haircut AdjustmentTue, 03 Feb 2026 18:40:01 +0800{C636BA7B-B48B-44FB-BEE7-937D213096B0}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_034_2026Feb03160324?sc_lang=enRisk Management Arrangements in respect of the Lunar New Year HolidaysTue, 03 Feb 2026 16:48:22 +0800{857EEA79-B29C-445B-A4D9-DAEBE3EB119C}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_030_2026Feb02133000?sc_lang=enSEOCH Reserve Fund Variable ContributionsMon, 02 Feb 2026 13:29:11 +0800{AFFB2850-2884-4B4B-9257-C15D58D2ACCD}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_OEC_015?sc_lang=enRollout of HKATS and DCASS Operating System UpgradeThu, 22 Jan 2026 17:00:15 +0800{E2F7716A-C9BC-4A50-90FC-FE13BE226143}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_OEC_012_2026?sc_lang=enSFTP Facilities Upgrade for the Report Access Platform - Verification SessionTue, 20 Jan 2026 19:08:25 +0800{962C2C41-9E0A-474F-BDB0-A47685ACA23F}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_014_2026Jan12170322?sc_lang=enMargin Parameters and Update of PC-SPAN Organisation Master File for Six New Stock Option ClassesTue, 13 Jan 2026 13:37:57 +0800{5392ED72-8A9E-4C20-A4F8-F039A514E4FF}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_010_2026Jan05163306?sc_lang=enCollateral Haircut AdjustmentMon, 05 Jan 2026 17:08:23 +0800{BA32A370-54E7-4FE0-9175-710E5185803B}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2026/SEOCH_DCRC_003_2026Jan02133000?sc_lang=enSEOCH Reserve Fund Variable ContributionsFri, 02 Jan 2026 13:39:47 +0800{919CA45D-A35A-4E17-8BA1-D747A40F4BA2}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2025/20251231_MSM_014_2025?sc_lang=enCompliance Bulletin (Issue No. 16) - Reminder on Hong Kong Investor Identification Regime (“HKIDR”) BCAN-CID Mapping File Submission RequirementsWed, 31 Dec 2025 16:53:20 +0800{A0CE8ABC-F77F-4630-9E4C-265BBC18ED5E}https://www.hkex.com.hk/Services/Circulars-and-Notices/Participant-and-Members-Circulars/SEOCH/2025/SEOCH_DCRC_352_2025Dec23160314?sc_lang=enMandatory Intra-day Margin Call in respect of the New Year HolidayTue, 23 Dec 2025 16:27:33 +0800