TechFlow News: On May 29, Bybit announced that, effective June 11, the calculation method for Open Interest (OI) will change from bilateral counting to single-sided counting, and API users are advised to update their API fields promptly. This move aims to enhance market transparency and align Bybit’s OI calculation methodology with those of other crypto derivatives platforms, thereby facilitating cross-platform data comparison for users and analysts.
Under the new calculation method, the displayed Open Interest value will decrease, but actual market activity remains unchanged. This adjustment reflects only a change in calculation methodology; each user’s actual position size, margin, profit/loss, and position limits remain unaffected. Additionally, the system will automatically adjust fees to maintain existing position limit levels.
Starting June 11, updated Open Interest data will be displayed on Bybit’s market data page, trading page, and mobile app. API users must complete their system updates before the effective date.
Example: For the BTCUSDT perpetual contract, if there are simultaneously 1,000 BTC long positions and 1,000 BTC short positions, the displayed Open Interest will change from 2,000 BTC to 1,000 BTC.
