HKEX to extend after-hours derivatives trading until 4:15 AM to align with European and US trading hours. Hong Kong Exchanges and Clearing Limited (HKEX) announced on Monday that, subject to regulatory approval and system readiness, it will extend the closing time of its derivatives After-Hours Trading (AHT) session by 75 minutes, from 3:00 AM to 4:15 AM, starting in March 2027. HKEX also stated that it is considering a further extension to 5:15 AM by November 2027.