[Announcement from OKX Regarding Adjustment to DUCKUSDT Perpetual Contract Tiered Margin Rules] Dear OKX Users, To further enhance market liquidity, OKX plans to adjust the tiered margin rules for DUCKUSDT perpetual contracts on September 19, 2025, from 6:00 PM to 10:00 PM (UTC+8). Details of the adjustment plan are as follows: Please note that due to market conditions, the adjustment time for certain tokens may be subject to change or postponed. Please refer to the *Position Tier Description* to confirm whether the adjustments for the relevant tokens have been successfully implemented. Risk Warning Due to recent significant market fluctuations, the maintenance margin rate for user positions may increase after the tiered margin rule adjustment. To prevent forced liquidation caused by the rule changes, please promptly manage your risk by closing positions, reducing leverage, or adding margin to lower the actual leverage ratio. OKX will continue to provide you with superior products and high-quality services! OKX Team September 19, 2025