Event Contract Liquidity Rewards Program

To further enhance liquidity and the trading experience in OKX Event Contract markets, OKX is launching the Event Contract Liquidity Rewards Program. The program rewards participants for consistently providing two-sided liquidity close to the market midpoint and for genuine passive executions.

1. Program Start Date

October 1, 2026 (UTC+8)Rewards are calculated by calendar month. At the beginning of each month, OKX will calculate rewards for the preceding calendar month and will complete the calculation and distribution within the first two weeks of the month.

2. Monthly Rewards

The program offers up to 48,000 USDT per month, allocated as follows:

• Quoted Liquidity Rewards: 80%

• Passive Trading Volume Rewards: 20%

Rewards are calculated by calendar month and distributed to participants’ master accounts after monthly settlement. A master account must earn at least 10 USDT in total rewards for the month to qualify for distribution.

3. How to Participate

• Participants must contact their designated Relationship Manager (RM) to register for the program.

• Orders placed through API, Web, App, and other supported channels may participate.

• The program applies to eligible OKX Event Contract products.

• Only qualifying orders and maker executions will be included in reward calculations.

If a master account has multiple sub-accounts, qualifying orders and executions across those sub-accounts will be consolidated at the master-account level before rewards are calculated. Splitting activity across sub-accounts will not increase the master account’s overall reward weight.

4. Monthly Reward Pools by Series

OKX may adjust reward pools for subsequent months based on market liquidity, product availability, and program performance. The reward pools published on the program page for the applicable month will prevail.

5. Quoted Liquidity Reward Rules

For each Series, 80% of the monthly reward pool is allocated to qualifying quoted liquidity.

5.1 Key Parameters

5.2 Adjusted Midpoint

At each order book evaluation, the adjusted midpoint is calculated using the full order book:

1. On each side of the order book, order size is accumulated from the best price outward.

2. When cumulative size on a side first reaches 20 contracts, the corresponding price becomes that side’s cutoff price.

3. If cumulative size on a side is below 20 contracts, that side’s best bid or best ask is used instead.

4. If both sides contain orders, the adjusted midpoint is the average of the two applicable side prices.

5. If only one side contains orders, the adjusted midpoint is that side’s best available price.

6. If neither side contains a positive remaining order quantity, that evaluation is excluded from reward calculations.

5.3 Consolidation Across Sub-Accounts

Orders are evaluated at the master-account level:

• Remaining order quantities from different sub-accounts under the same master account are first consolidated when they have the same side and price level.

• The consolidated quantity must reach 20 contracts before that price level is eligible for scoring.

• Quantities at different price levels cannot be combined to satisfy the minimum qualifying order size.

• Buy-side and sell-side liquidity may be provided by different sub-accounts under the same master account.

5.4 Score for Each Price Level

For each qualifying price level:score = ((v - s) / v)² × sizeWhere:

• v = 3 cents;

• s = the distance between the order price and the adjusted midpoint;

• size = the consolidated remaining order quantity for the master account at that side and price level.

Orders closer to the adjusted midpoint receive higher scores. If the calculated distance is negative because an order price crosses the adjusted midpoint, s is set to 0. The maximum score for that price level is therefore equal to size.

5.5 Two-Sided Liquidity Score

The system separately aggregates each master account’s buy-side score (Bid) and sell-side score (Ask).When the adjusted midpoint is within [0.10, 0.90]:Q = max(min(Bid, Ask), max(Bid, Ask) / 3)When the adjusted midpoint is within [0, 0.10) or (0.90, 1]:Q = min(Bid, Ask)This means:

• More balanced two-sided liquidity generally earns a higher score.

• Within the normal price range, one-sided or imbalanced liquidity is discounted.

• Within the extreme price ranges, a participant must provide two-sided liquidity to earn a quoted-liquidity score.

5.6 Share at Each Order Book Evaluation

At each valid evaluation, a participant’s quoted-liquidity share is:q = Q / sum of Q across all participating master accountsOKX will continuously evaluate order book activity throughout the program and accumulate each participant’s share across valid evaluations. In general, liquidity maintained for longer periods and across more valid evaluations will produce a higher cumulative score.If the sum of Q across all participants is 0 for an evaluation, no quoted-liquidity reward is allocated for that evaluation, and the corresponding amount will not be redistributed to other evaluation times.

5.7 Monthly Quoted Liquidity Reward

Monthly Quoted Liquidity Reward
= Monthly Quoted Liquidity Reward Pool
× Master Account Monthly Cumulative Liquidity Score
÷ Number of Order Book Evaluations Included for the MonthLiquidity scores are accumulated over the calendar month. The reward pool will not be re-normalized across eligible participants again at month-end.

6. Passive Trading Volume Reward Rules

For each Series, 20% of the monthly reward pool is allocated to qualifying maker executions.

6.1 Qualifying Executions

A trade must meet all of the following conditions:

• The participant provides liquidity as the maker.

• The participant’s resting order is executed by another market participant.

• The execution belongs to an eligible Event Contract Series.

6.2 Reward Calculation

Monthly Passive Trading Volume Reward
= Monthly Passive Trading Volume Reward Pool
× Master Account Monthly Maker Volume in Contracts
÷ Total Monthly Maker Volume in Contracts Across All Participating Master AccountsMaker volume across all sub-accounts under the same master account will be consolidated.If an eligible Series has no qualifying maker executions during a month, its passive trading volume reward pool will not be distributed and will not be transferred to the quoted-liquidity reward pool.

7. Monthly Reward Distribution

A participant’s final monthly reward is the sum of quoted-liquidity rewards and passive trading volume rewards earned across all eligible Series:Total Monthly Reward
= Quoted Liquidity Reward + Passive Trading Volume Reward

• Rewards are consolidated at the master-account level.

• A master account must earn at least 10 USDT for the month to qualify for distribution.

• Rewards are distributed in USDT to the participant’s master account.

• Actual distributed rewards may be lower than the published maximum reward pools due to invalid order book evaluations, the absence of qualifying maker executions, the minimum distribution threshold, or final data verification.

8. Market Monitoring and Fair Participation

To protect market integrity and program fairness, OKX will monitor order book activity, order placement and cancellation behavior, executions, and abnormal trading patterns.Participants must not attempt to obtain rewards through false or non-bona fide orders, self-trading, coordinated account manipulation, abnormal order placement or cancellation, technical methods intended to evade monitoring, or other improper conduct. OKX may exclude abnormal activity from calculations, reduce or cancel related rewards, and take other appropriate measures against accounts that violate these requirements.

9. Important Notes

• Published reward amounts represent maximum available rewards. Actual distributions depend on qualifying liquidity, qualifying executions, and final settlement results.

• Amounts not distributed due to the absence of qualifying liquidity or maker executions will not be transferred to another reward pool.

• OKX may adjust program parameters, eligible Series, reward pools, and program arrangements based on market conditions.

• If there is any inconsistency between this document and the latest program page or announcement, the latest program page or announcement will prevail.

• OKX reserves the right of final interpretation of this program.