Session overlap · China Standard Time
SSE & HKEX overlap hoursin Shanghai time
Both exchanges are open at the same time between 09:30 and 15:00 Shanghai time, a 5h 30m shared window. SSE trades 17:30–23:00 and HKEX trades 17:30–00:00 in Shanghai time. Both run Monday to Friday, so the overlap occurs on weekdays only.
- 09:30
- Overlap starts (Shanghai)
- 15:00
- Overlap ends (Shanghai)
- 5h 30m
- Shared trading time
Overlap window in Shanghai
09:30–15:00
China Standard TimeTimes assume the exchanges’ regular sessions and are converted from exchange local time to China Standard Time; holidays and early closes can remove the overlap on a given day.
| Market | Open (China Standard Time) | Close (China Standard Time) |
|---|---|---|
| SSE | 17:30 | 23:00 |
| HKEX | 17:30 | 00:00 |
How the SSE–HKEX overlap is calculated
The overlap is the intersection of each exchange’s regular trading session after converting both to China Standard Time. In this timezone, SSE runs 17:30–23:00 and HKEX runs 17:30–00:00, so both are open together from 09:30 to 15:00 — 5h 30m of shared trading time.
Weekends are excluded, and any full-day holiday or early close on either side shrinks the window for that date. Use the two holiday calendars below before planning a session that relies on the overlap, and check the live open/closed status if you need the current figure rather than the scheduled one.