Announcement from Ouyi on Adjustment of Transaction Contract Fee Parameters Dear Ouyi user: Starting from 16:00-17:00 (UTC+8) on May 6, 2026, Ouyi will update the transaction fee structure for event contracts. The specific parameter adjustments are as follows: hanging order fee (K2): updated from 0 to -0.009. As a hanging party, each transaction order will receive a commission rebate, which will be credited to the account in real-time. Settlement fee: waived. No fees will be charged for settling positions at maturity. Cost Reference Table (C=100, K1=0.045, K2=-0.009) Price (P) Transaction Value 0.001.0238-0.20480.707.000.9450-0.18900.7575.000.88438-0.16888.808.000.7200-0.14400.8585.0000.5738-0.1480.90.00.4050-0.0810.9595.0002138-0.04280.999.00.0446-00.0089 The handling fee is symmetrical with P=0.5, and the cost at point P is equal to the cost at point (1-P). Please adjust your participation strategy as needed. We deeply apologize for any inconvenience caused to you. If you have any questions, please contact customer service or visit the help center. If institutions and VIP clients need assistance, they can use your existing OKX Telegram group, @ OKX_Institutions Telegram group, send an email to institutional @ (okx.com), or contact your account manager. Risk Warning: The above overview and related information are for reference and educational purposes only, and some of the content may be provided by third parties rather than OKX. OKX does not guarantee the accuracy or completeness of any information described in this article, and such information does not constitute any representations, warranties, or any form of financial, investment, or other advice made by OKX. This information may not be suitable for all individuals and should not be used as a basis for trading by specific investors, nor should it constitute or be interpreted as any offer, recommendation, or solicitation. The above information also does not apply to individuals residing in jurisdictions where providing such information would violate the laws or regulations of their jurisdiction. Digital assets are highly speculative and accompanied by high volatility, which may become illiquid at any time, and investors may also lose their entire investment value. Before trading any digital asset, you should conduct your own research and evaluate your risk tolerance. OKX shall not be liable for any losses incurred by you as a result of trading digital assets. You are responsible for understanding and complying with applicable local laws and regulations on your own. For more information, please refer to the OKX Terms of Service and Risk Disclosure and Disclaimer. Thank you for your continued support. Ouyi team