Open interest limits of contracts
To prevent market risks from being overly concentrated among a few traders and to guard against market manipulation in any specific futures, OKX limits the position value of users in a specific futures relative to the total position value of the futures on the platform. Additionally, to reduce the risk of abnormal market volatility, OKX imposes platform-wide position value limits on certain futures.
Single user position limits
In any specific futures, if the open positions and orders (across the main and sub-accounts) reach or exceed the maximum limits of open position percentage per user and open position limit per user, position limit rules will apply to the main and sub-accounts. Once the position limit rules are triggered, the system rejects any new opening orders in this futures. Reduce-only orders are not restricted by this rule.
Users are strictly prohibited from using multiple accounts to build concentrated positions in the same trading pair to circumvent open interest limits. If such behavior is detected and deemed, at OKX’s sole and absolute discretion, to pose a significant risk to market stability, OKX reserves the right to intervene, including taking over or closing the relevant positions.
Detailed rules:
If the current USD value of same-direction open positions and orders across your main and sub-accounts reaches or exceeds Max (Position value on platform (USD) × Position percentage threshold, Position limit per user (USD)), your new orders in the same direction will be rejected; otherwise, they’ll pass the restriction. (Open API error code: 54030)
Assume the position percentage threshold of a certain contract is 20% and the open position limit per user is 250,000 USD:
If a contract’s open interest (market size) is low and the total position value of the contract on the platform is 500,000 USD, your position limit will be Max (500,000 USD × 20%, 250,000 USD) = 250,000 USD.
If the open interest increases and the corresponding total position value on the platform reaches 20,000,000 USD, your position limit will increase to Max (20,000,000 USD × 20%, 250,000 USD) = 4,000,000 USD.
Notes:
These rules apply to all crypto contracts (including USDT-margined contracts, USDC-margined contracts, and crypto-margined contracts). Only opening orders are limited, as opposed to closing orders.
The position value and position percentage of long and short positions are calculated separately. This means that new long-opening orders will fail once the long position limit is reached, and new short opening orders will fail once the short position limit is reached.
Platform-wide open position limits
The platform’s total position limits and parameters are set based on market conditions, to reduce the risk of abnormal market volatility . OKX reserves the right to dynamically adjust the limits and parameters based on market changes.
Detailed rules:
If the platform’s total position value (USD) exceeds the platform-wide open position limit, all users’ new opening orders for that futures will be rejected by the system. Reduce-only orders and closing orders won’t be affected. (Open API error code: 54031)
Notes:
The above rules only apply to some futures. Please refer to trading rules and open position limits for the specific values and parameters. If a futures is not shown on the trading rules page or its Open API query returns empty results, then the above rules do not apply to these futures.
For parameters of open interest limits for expiry futures, please refer to:
https://www.okx.com/trade-market/info/futures
For parameters of open interest limits for perpetual futures, please refer to:
https://www.okx.com/trade-market/info/swap
For rules on platform position limit values for perpetual futures, refer to:
https://www.okx.com/trade-market/info/swap
Open API query:
https://www.okx.com/docs-v5/en/#trading-account-rest-api-get-instruments
Note: The relevant thresholds or parameters would be adjusted in real-time based on market conditions, without separate announcements.
Disclaimer
This content is provided for informational purposes only and may cover products that are not available in your region. It is not intended to provide (i) investment advice or an investment recommendation; (ii) an offer or solicitation to buy, sell, or hold crypto/digital assets, or (iii) financial, accounting, legal, or tax advice. Crypto/digital asset holdings, including stablecoins and NFTs, involve a high degree of risk and can fluctuate greatly. You should carefully consider whether trading or holding crypto/digital assets is suitable for you in light of your financial condition. Please consult your legal/tax/investment professional for questions about your specific circumstances. Information (including market data and statistical information, if any) appearing in this post is for general information purposes only. While all reasonable care has been taken in preparing this data and graphs, no responsibility or liability is accepted for any errors of fact or omission expressed herein. Both OKX Web3 Wallet and OKX NFT Marketplace are subject to separate terms of service at www.okx.com.
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