Trading at FSMOne from Monday to Friday, except on Hong Kong public holidays.
| Session | Trading Phase | Full Day Trading | Half Day Trading |
| Pre-Open | Order Input | 9.00am - 9.15am | 9.00am - 9.15am |
| Non-cancellation | 9.15am - 9.20am | 9.15am - 9.20am | |
| Random Matching | 9.20am - 9.22am | 9.20am - 9.22am | |
| Blocking | 9.22am - 9.30am | 9.22am - 9.30am | |
| Open | Morning Session | 9.30am - 12.00pm | 9.30am - 12.00pm |
| Mid Day Break | 12.00pm - 1.00pm | Not Applicable | |
| Afternoon Session | 1.00pm - 4.00pm | Not Application | |
| Pre-Close | Reference Price Fixing | 4.00pm - 4.01pm | 12.00pm - 12.01pm |
| Order-Input | 4.01pm - 4.06pm | 12.01pm - 12.06pm | |
| Non-Cancel | 4.06pm - 4.08pm | 12.06pm - 12.08pm | |
| Random Close | 4.08pm - 4.10pm | 12.08pm - 12.10pm |