OKX Announcement on the Adjustment to the Calculation Method of Delivery, Exercise, and Settlement Prices
To further enhance the user trading experience, OKX will adjust the calculation method for Delivery Price, Exercise Price, and Settlement Price effective 18 March 2026（UTC+8）.
After the adjustment, the relevant price will be calculated as the average of the index prices during the last 30 minutes prior to expiration. The system will record one price point every 200 milliseconds, and the final price will be determined by averaging all recorded price points within this time window. As a result, the calculation window will be shortened from 1 hour to 30 minutes.
For the avoidance of doubt, 18 March 2026（UTC+8）will be the first day on which the 30-minute calculation window will apply.
In addition, any calculations that rely on such averaged prices (for example, Delta decay and other related parameters) will be updated accordingly.
OKX reserves the right to make further adjustments to the price calculation methodology with prior notice.