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September 12, 2025
Ops Notice 2025-037

TMX Group

TMX Operational Notice

General Test Environment (GTE) – Decryption Key Expiry and Rollover

Broadcast Feed (TBF/TRF, CBF/VRF, ABF/ARF) recipients are advised that current Decryption Keys (DK) in the General Test Environment (GTE) expire at the end of the day on Wednesday, October 01, 2025. Next period DK keys take effect on Thursday, October 02, 2025.

All clients should have the next-period GTE Decryption Keys in their possession. If you are missing any GTE DK keys, they are available for approved recipients on the TMX Axis Client Portal during the rollover period.

The rollover in the PRODUCTION environment is still scheduled to expire at the end of the day on Thursday, October 16, 2025, and is not impacted by the GTE rollover.

***A future notice will be sent providing details and timelines for the PRODUCTION (PROD) Decryption Key Expiry and Rollover to be held on October 16, 2025***

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