Adjustments to mark price calculation for Perpetual contracts

To enhance price stability during extreme market conditions and reduce the risk of unexpected liquidations, Bybit will update the mark price calculation method for Perpetual contracts.

The new mechanism will be rolled out gradually from Nov 14, 2025, 10AM UTC, and fully implemented for all applicable symbols by Nov 20, 2025, 10AM UTC.

Why we're making this change

The updated calculation method is designed to reduce short-term mark price distortions that may occur during one-sided market movements or unusual market activity, ensuring the mark price remains more stable and accurately reflects market conditions.

What's changing

Implementation details

- Effective date: Nov 14, 2025, 10AM UTC

- Scope:

• Applies to Perpetual contracts listed after the time mentioned above (excluding Expiry contracts)

• Applicable symbols:

RIFUSDT, QUICKUSDT, OXTUSDT, PYRUSDT, 10000ELONUSDT, FIOUSDT, MILKUSDT, DODOUSDT, NTRNUSDT, BOBAUSDT

Notes

- The system will automatically apply the update — no action is required from users.

- Existing positions, trades and historical data will not be affected.

- While this update improves mark price stability, market risks cannot be completely eliminated.

- Bybit reserves the right to adjust or change the mark price calculation method under extreme market conditions without prior notice.

If you have any questions or require further assistance, please contact our Customer Support via [this form](https://www.bybit.com/en/help-center/s/webform).

Thank you for your continued support.