[Announcement on Updates to Settlement Rules for Event Contract Up/Down Events] Starting from August 17, 2026, 16:00 (UTC+8), the relevant up/down events will be settled according to the new rules. II. Adjustments to Settlement Rules Event Type | Current Settlement Window | Updated Settlement Window 5-Minute Up/Down Event | 5 seconds (5 data points) | 30 seconds (30 data points) 15-Minute Up/Down Event | 15 seconds (15 data points) | 1 minute (60 data points) The settlement price will still be the arithmetic average of the second-level index candlestick closing prices within the settlement window. Other settlement mechanisms, including index sources, result determination, and review processes, remain unchanged. Users' profit and loss settlement amounts and fees are not affected by this adjustment. Existing positions can continue to be held and traded without any action required. For details, please refer to the explanation of event contract trading and settlement logic.