- It is the intention of this modification to promote comparability among derivatives platforms and to increase transparency
- As a result of this shift, Bybit’s reporting methodology is brought into alignment with procedures that are typically used throughout global derivatives markets.
With effect from June 11, 2026, Bybit, the cryptocurrency exchange that is the second-largest in the world in terms of trading volume, has stated that it would be updating the technique that it uses to calculate Open Interest (OI). As a result of this transition, the counting of OI will shift from being bilateral (dual-sided) to being unilateral (single-counted). As a result of this shift, Bybit’s reporting methodology is brought into alignment with procedures that are typically used throughout global derivatives markets.
Although it is anticipated that the presented OI values would seem to be lower owing simply to the changed counting approach, this is merely a reflection of a change in the procedures that are used to calculate. The actual positions held by traders, the restrictions placed on those positions, the margin requirements, the computations of profit and loss, and the risk exposure remaining unchanged.
It is the intention of this modification to promote comparability among derivatives platforms and to increase transparency. Traders and analysts are provided with a more realistic depiction of the actual market positioning, and it creates the opportunity for improved comparison across different cryptocurrency derivatives platforms.
The Way That It Operates
An example of bilateral measurement is when a trader has both long and short positions open concurrently for the same amount of assets. In this scenario, the trader counts both the long and short sides individually.
The complete position is only tallied once due to the new unilateral technique that has been implemented. Due to the fact that the identical market action will be tallied once rather than twice, this may result in the displayed OI value decreasing by around fifty percent instead of twice.
OI multiplied by rate is the formula that is used to determine position restrictions. Because unilateral OI becomes approximately 50% of the previous bilateral value, the system will double the applicable rate for each contract. The real position restrictions that traders have on Bybit will stay constant as a result of this.
Versions of the Platform and API
The following parts of Bybit will begin using the upgraded OI displays as of June 11, 2026: the Markets page (which includes OI charts for perpetuals, futures, and options), the Trading page (which includes an OI indicator), the Contract detail and Open Interest pages, as well as the in-app candle lines and data panel.
Users that access OI data via the API, whether they are developers or institutional users, will have access to two additional fields:
- singleOpenInterest (unilateral open interest value)
- singleOpenInterestValue (represents the unilateral open interest in US Dollars).
Those who use the API and those who integrate platforms need to make the necessary adjustments to their systems before the effective date.
Those who are interested in learning more about the change, seeing examples of the new calculating technique, and receiving instructions on how to alter the API may go to: Update to Open Interest (OI) Data
