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
24/03/2025	MDD/25/128	Implementation of Phase 1 of Minimum Spreads Reduction in Hong Kong Securities Market - Updated Spread Table Code Information and Frequently Asked Questions (FAQ) Enclosure 1 : Exchange Circular (English)	Y
17/03/2025	MDD/25/119	Final Strike Information for Six New Stock Option Classes Enclosure 1 : Final strike Info for Six New Stock Option Classes		Y	Y
14/03/2025	MDD/25/114	Final Strike Information for Guotai Junan Securities Co., Ltd. Adjusted Stock Option Contracts after the Capital Adjustment of Haitong Securities Co., Ltd. Enclosure 1 : Final strike info. for GTJA adjusted stock options		Y	Y
12/03/2025	MDD/25/112	Final Strike Information for WH Group Limited Stock Option Contracts after the Capital Adjustment Enclosure 1 : Final strike information for WH Group stock option		Y	Y
07/03/2025	MDD/25/084	Arrangement of HKEX Orion Market Data Platform - Securities Market (OMD-C) and Mainland Market Data Hub (MMDH) for Phase 1 Implementation of Minimum Spreads Reduction in Hong Kong Securities Market Enclosure 1 : Exchange Circular (English) Enclosure 2 : OMD-C Interface Specifications (version 1.43) Enclosure 3 : OMD-C Interface Specifications (version 1.39c) Enclosure 4 : OMD-C MMDH Interface Specifications (version 1.42) Enclosure 5 : OMD-C MMDH Interface Specifications (version 1.38c	Y
04/03/2025	MDD/25/094	New Updates on Arrangements Relating to the Capital Adjustment of Haitong Securities Co., Ltd. Stock Futures and Stock Option Contracts - Merger Enclosure 1 : Exchange Circulars (English)		Y	Y
03/03/2025	MDD/25/091	Arrangement in HKEX Orion Market Data Platform - Derivatives Market (OMD-D) for the Capital Adjustment of WH Group Limited Stock Option Contracts - Special Dividend Enclosure 1 : Exchange Circular (English)		Y	Y
28/02/2025	MDD/25/087	Arrangement in HKEX Orion Market Data Platform - Derivatives Market (OMD-D) for Introduction of Six New Stock Option Classes Enclosure 1 : Exchange Circulars (English) Enclosure 2 : Vendor Access Codes Confirmation Form		Y	Y
28/02/2025	MDD/25/066	Arrangement of HKEX Orion Market Data Platform - Derivatives Market (OMD-D) Technical Upgrade		Y	Y
19/02/2025	MDD/25/067	Final Strike Information for China Tower Corporation Limited Stock Option Contracts after the Capital Adjustment Enclosure 1 : Final strike info for CHINA TOWER stock options		Y	Y
11/02/2025	MDD/25/048	Successful Launch of HKEX Data Marketplace and CCASS Shareholding Data	Y	Y	Y	Y
24/01/2025	MDD/25/030	Updates on Arrangements Relating to the Capital Adjustment of Haitong Securities Co., Ltd. Stock Futures and Stock Option Contracts - Merger Enclosure 1 : Exchange Circulars (English)		Y	Y
15/01/2025	MDD/25/016	Addition of Headline Categories in Issuer Information feed Service (IIS) Enclosure 1 : IIS Transmission Specification (version 4.5)				Y
14/01/2025	MDD/25/017	Revised Last Trading Day and Final Settlement Day of Derivatives Products Enclosure 1 : Exchange Circular		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)