Client Notices

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The client notices have been distributed with all enclosures by e-mail to related Clients. For enquiry, please contact HKEX Information Services Limited ("HKEX-IS") by emailing to hkex-is@hkex.com.hk.

Y = Applicable

Date	Ref No.	Subject	Securities Market Data	Derivatives Market Data		Issuer News	Stock Connect Market Data
Date	Ref No.	Subject	OMD-C	OMD-D	D-LITE	IIS	OMD-CC
29/12/2023	MDD/23/1688	Revised Last Trading Day and Final Settlement Day of MSCI China A 50 Connect (USD) Index Futures February 2024 Contract Enclosure 1 : Exchange Circular (English)		Y	Y
27/12/2023	MDD/23/1685	2024 HKEX Calendar, Operation Calendar for Market Data Systems, and Index Feed Arrangement in Hong Kong Holidays Enclosure 1 : 2024 HKEX Calendar Enclosure 2 : 2024 Market Data Systems Operation Calendar Enclosure 3 : 2024 Index Feed Arrangement in Hong Kong Holidays	Y	Y	Y	Y	Y
22/12/2023	MDD/23/1684	Market Data Marketing Programmes relating to Stock Connect - Update	Y	Y	Y	Y
20/12/2023	MDD/23/1678	Post Release Tests for Firmware Upgrade of HKEX Backbone Network for Securities Market Systems Enclosure 1 : Exchange Circulars (English)	Y				Y
18/12/2023	MDD/23/1677	Planned Activities - Initiatives in Relation to Market Data Systems for 2024	Y	Y	Y	Y	Y
05/12/2023	MDD/23/749	Updates on IIS Technical Upgrade - Provisioning of IIS Certification Test Environment and Updated IIS TS Enclosure 1 : IIS Transmission Specification version 4.2				Y
29/11/2023	MDD/23/735	Arrangement in HKEX Orion Market Data Platform - Derivatives Market (OMD-D) for Introduction of the 10-year China Ministry of Finance Treasury Bond Futures Enclosure 1 : Exchange Circular (English) Enclosure 2 : Vendor Access Codes Confirmation Form		Y	Y
22/11/2023	MDD/23/714	Introduction of Market Data Fees Pilot Programme for Retail Participation	Y	Y	Y	Y
22/11/2023	MDD/23/710	Final Strike Information for New World Development Co. Ltd Stock Option Contracts after the Capital Adjustment Enclosure 1 : Final strike info for New World Dev stock options		Y	Y
15/11/2023	MDD/23/690	Second Practice Session for Firmware Upgrade of HKEX Backbone Network for Securities Market Systems Enclosure 1 : Exchange Circular (English)	Y				Y
08/11/2023	MDD/23/667	Practice Session for Firmware Upgrade of HKEX Backbone Network for Securities Market Systems Enclosure 1 : Exchange Circular (English)	Y				Y
13/10/2023	MDD/23/626	Revised Last Trading Day and Final Settlement Day of MSCI Philippines (USD) Index Futures October 2023 contract Enclosure 1 : Exchange Circular (English)		Y	Y
10/10/2023	MDD/23/615	Mainland Market Data Hub ('MMDH') Data Centre Failover Drill on 11 November 2023	Y
03/10/2023	MDD/23/603	Arrangement in HKEX Orion Market Data Platform - Derivatives Market (OMD-D) for the Capital Adjustment of New World Development Co. Ltd Stock Futures and Option Contracts - Conditional Special Dividend Enclosure 1 : Exchange Circulars (English)		Y	Y
31/08/2023	MDD/23/550	Final Strike Information for Swire Pacific Ltd. 'A' Stock Option Contracts after the Capital Adjustment Enclosure 1 : Final strike information for Swire Pacific A stock		Y	Y
30/08/2023	MDD/23/494	Updated Implementation Schedule for the Issuer Information feed Service (IIS) Technical Upgrade Enclosure 1 : IIS Transmission Specification version 4.1.pdf				Y
23/08/2023	MDD/23/538	Arrangement in HKEX Orion Market Data Platform - Derivatives Market (OMD-D) for the Capital Adjustment of Swire Pacific Ltd. 'A' Stock Futures and Option Contracts - Special Dividend Enclosure 1 : Exchange Circulars (English)		Y	Y
15/08/2023	MDD/23/510	Discontinuation of HKEX Gold Futures Indices Dissemination in OMD Index Datafeed Enclosure 1 : OMD-C Connectivity Guide (version 2.6) Enclosure 2 : OMD-C Interface Specifications (version 1.37) Enclosure 3 : OMD-C MMDH Interface Specifications (version 1.36)	Y	Y	Y
11/08/2023	MDD/23/502	Introduction of Block Trading under Stock Connect Enclosure 1 : Exchange Circular					Y
04/08/2023	MDD/23/496	Launch of Enhancement to the Block Trade Facility in the Derivatives Market on 28 August 2023 Enclosure 1 : Exchange Circulars (English)		Y	Y
28/07/2023	MDD/23/470	Regular Data Centre Failover Rehearsal for Market Data Systems on 19 August 2023 Enclosure 1 : Rundown of the Rehearsal	Y	Y	Y	Y	Y
04/07/2023	MDD/23/442	Final Strike Information for Yankuang Energy Group Co. Ltd. Stock Option Contracts after the Capital Adjustment Enclosure 1 : Final strike information for Yankuang Energy stock		Y	Y
29/06/2023	MDD/23/436	Arrangement in HKEX Orion Market Data Platform - Derivatives Market (OMD-D) for Enhancement to the Block Trade Facility in the Derivatives Market Enclosure 1 : Exchange Circulars (English) Enclosure 2 : OMD-D Interface Specification v1.44		Y	Y
27/06/2023	MDD/23/431	Revised Last Trading Day and Final Settlement Day of MSCI India (USD) Index Futures June 2023 Contract Enclosure 1 : Exchange Circular (English)		Y	Y
21/06/2023	MDD/23/416	Final Strike Information for Weibo Corporation Stock Option Contracts after the Capital Adjustment Enclosure 1 : Final strike information for Weibo stock options		Y	Y
09/06/2023	MDD/23/397	Further Updates on Arrangement of HKEX Orion Market Data Platform - Securities Market (OMD-C) and Mainland Market Data Hub (MMDH) for the Launch of the HKD-RMB Dual Counter Model Eligible for Market Making in Hong Kong Securities Market Enclosure 1 : Exchange Circular (English)	Y
09/06/2023	MDD/23/260	Arrangement for the Issuer Information feed Service (IIS) Technical Upgrade Enclosure 1 : IIS Transmission Specification v4.0.pdf				Y
06/06/2023	MDD/23/390	Arrangement in HKEX Orion Market Data Platform - Derivatives Market (OMD-D) for the Capital Adjustment of Yankuang Energy Group Co. Ltd. Stock Futures and Option Contracts - Bonus Shares and Special Cash Dividend Enclosure 1 : Exchange Circulars (English)		Y	Y
05/06/2023	MDD/23/380	Updates on Arrangement of HKEX Orion Market Data Platform - Securities Market (OMD-C) and Mainland Market Data Hub (MMDH) for the Launch of the HKD-RMB Dual Counter Model Eligible for Market Making in Hong Kong Securities Market Enclosure 1 : Exchange Circular (English)	Y
05/06/2023	MDD/23/386	New Minimum Bandwidth Requirement for HKEX Orion Market Data Platform - Derivatives Market (OMD-D) Derivatives Premium (DP) and FullTick (DF) Datafeeds Effective from 19 June 2023		Y	Y
30/05/2023	MDD/23/372	Arrangement in HKEX Orion Market Data Platform - Derivatives Market (OMD-D) for the Capital Adjustment of Weibo Corporation Stock Futures and Option Contracts - Special Cash Dividend Enclosure 1 : Exchange Circular (English)		Y	Y
19/05/2023	MDD/23/364	Arrangement of HKEX Orion Market Data Platform - Securities Market (OMD-C) and Mainland Market Data Hub (MMDH) for upcoming launch of the HKD-RMB Dual Counter Model Eligible for Market Making in Hong Kong Securities Market Enclosure 1 : Exchange Circular (English)	Y
15/05/2023	MDD/23/348	End of Stabilization Period for the launch of the Removal of Account Password Requirement in Issuer Information feed Service ('IIS')				Y
11/05/2023	MDD/23/325	Arrangement of HKEX Orion Market Data Platform - Securities Market (OMD-C) and Mainland Market Data Hub (MMDH) for Practice Session and End-to-End (E2E) Test for the Dual Counter Model in Hong Kong Securities Market Enclosure 1 : Exchange Circular (English) and Sample Files	Y
04/05/2023	MDD/23/316	Readiness Declaration and Market Rehearsal for Increase of Minimum Bandwidth Requirement for HKEX Orion Market Data Platform - Derivatives Market (OMD-D) Derivatives Premium (DP) and FullTick (DF) Datafeeds		Y	Y
28/04/2023	MDD/23/310	Arrangement in HKEX Orion Market Data Platform - Derivatives Market (OMD-D) for the After-Hours Trading on 29 May 2023 Enclosure 1 : Exchange Circular (English)		Y	Y
27/04/2023	MDD/23/307	Arrangement upon Issuance of Typhoon, Extreme Conditions, and/or Rainstorm Warning Signal	Y	Y	Y	Y	Y
25/04/2023	MDD/23/301	Arrangement of HKEX Orion Market Data Platform - Securities Market (OMD-C) in End-to-End (E2E) Test for the Dual Counter Model in Hong Kong Securities Market Enclosure 1 : Exchange Circular (English)	Y
21/04/2023	MDD/23/296	Official Launch of Trading Calendar Enhancement for Stock Connect Enclosure 1 : Exchange Circular (English) Enclosure 2 : OMD-CC Connectivity Guide version 1.2					Y
17/04/2023	MDD/23/287	Arrangement for the launch of the Removal of Account Password Requirement in Issuer Information feed Service ('IIS')				Y
31/03/2023	MDD/23/257	End of Stabilization Period for the launch of the Increase of Time Precision of Trade Time Field in HKEX Orion Market Data Platform - Securities Market (OMD-C) and Mainland Market Data Hub (MMDH) Enclosure 1 : Participant circular	Y
27/03/2023	MDD/23/145	End of Stabilization Period for the Implementation of the Compression Mechanism on HKEX Orion Market Data Platform - Derivatives Market (OMD-D) Derivatives Standard (DS) (SOM) Datafeed and Updates on OMD-D Connectivity Guide Enclosure 1 : OMD-D Connectivity Guide version 1.19		Y	Y
14/03/2023	MDD/23/228	Market Rehearsal for the Removal of Account Password Requirement in Issuer Information feed Service (IIS)				Y
03/03/2023	MDD/23/127	Final Strike Information for Three New Stock Option Classes Available for Trading on 6 March 2023 Enclosure 1 : Final strike info for 3 new Stock Option Classes		Y	Y
03/03/2023	MDD/23/128	Launch of the Expansion of Eligible Stocks under Stock Connect Enclosure 1 : Participant Circular (English)					Y
03/03/2023	MDD/23/126	Arrangements for the launch of the Increase of Time Precision of Trade Time Field in HKEX Orion Market Data Platform - Securities Market (OMD-C) and Mainland Market Data Hub (MMDH) Enclosure 1 : Participant circular (English) Enclosure 2 : Test Rundown of the Post Release Test	Y
27/02/2023	MDD/23/113	Arrangement for the Implementation of Compression Mechanism on HKEX Orion Market Data Platform - Derivatives Market (OMD-D) Derivatives Standard (DS) (SOM) Datafeed		Y	Y
24/02/2023	MDD/23/102	Increase the Minimum Bandwidth Requirement for HKEX Orion Market Data Platform - Derivatives Market (OMD-D) Derivatives Premium (DP) and FullTick (DF) Datafeeds Enclosure 1 : OMD-D Connectivity Guide version 1.18		Y	Y
24/02/2023	MDD/23/108	Launch of Trading Calendar Enhancement for Stock Connect Enclosure 1 : Participant Circular (English)					Y
23/02/2023	MDD/23/104	Final Strike Information for Link Real Estate Investment Trust Stock Options Contracts after the Capital Adjustment Enclosure 1 : Final strike information for LNA		Y	Y
20/02/2023	MDD/23/096	Arrangement in HKEX Orion Market Data Platform - Derivatives Market (OMD-D) for Introduction of Three New Stock Option Classes Enclosure 1 : Participant Circular (English) Enclosure 2 : Vendor Access Codes Confirmation Form		Y	Y
17/02/2023	MDD/23/95	Arrangement for the Removal of Account Password Requirement in Issuer Information feed Service (IIS) Enclosure 1 : IIS Transmission Specification v3.20.pdf Enclosure 2 : IIS Transmission Specification (Headline)v2.17.pdf				Y
14/02/2023	MDD/23/092	Arrangement in HKEX Orion Market Data Platform - Derivatives Market (OMD-D) for the Capital Adjustment of Link Real Estate Investment Trust Stock Futures and Options Contracts - Rights Issue Enclosure 1 : Participant Circulars (English)		Y	Y
10/02/2023	MDD/23/082	Practice Session for Increase of Time Precision of Trade Time Field in HKEX Orion Market Data Platform - Securities Market (OMD-C) and Mainland Market Data Hub (MMDH) Enclosure 1 : Participant circular (English) Enclosure 2 : Test Rundown of the Practice Session	Y
16/01/2023	MDD/23/035	Market Rehearsals for Compression Mechanism on HKEX Orion Market Data Platform - Derivatives Market (OMD-D) DS (SOM) Datafeed		Y	Y
12/01/2023	MDD/23/034	Revised Last Trading Day and Final Settlement Day of INR/CNH Futures, INR/USD Futures, MSCI Taiwan (USD) Index Futures and Options, MSCI Taiwan 25/50 (USD) Index Futures and MSCI Indonesia (USD) Index Futures Contracts Enclosure 1 : Participant Circular (English)		Y	Y
04/01/2023	MDD/23/006	Final Strike Information for Tencent Holdings Ltd. Stock Options Contracts after the Capital Adjustment Enclosure 1 : Final strike information for Tencent stock options		Y	Y

OMD-C = Orion Market Data Platform - Securities Market
OMD-D = Orion Market Data Platform - Derivatives Market
D-LITE = Derivatives Lite Datafeed
IIS = Issuer Information feed Service
OMD-CC = Orion Market Data Platform - China Connect (Securities)