Issuer Information feed Service (IIS)

Issuer Information feed Service (IIS) is a system for real-time feed service providing instantly trading news and announcements from listed companies and issuers listed on the HKEX securities market.

• Technical Documents

Current Production:

• Issuer Information feed Service (“IIS”) Transmission Specification (Version 4.6)

Effective upon removal of the three Tier 2 headline categories from 1 July 2026

• Issuer Information feed Service (“IIS”) Transmission Specification (Version 4.7)

• Certification Test Documents
  
  • Certification Test Schedule
  • Certification Test Case
  • Certification Test Result Declaration Form (for HKEX-IS clients / for HKEX-IS (China) clients)