Cboe BYX Gets Timestamp Rule Extension to 2030 for Simpler Compliance
Published Date: 6/27/2025
Notice
Summary
Cboe BYX Exchange is updating a rule to match a special permission from the SEC that lets them use less detailed timestamps until 2030 instead of 2025. This change affects traders and firms using the Exchange’s systems but won’t cost anyone extra. It’s effective immediately, keeping things smooth and clear for everyone involved.
Analyzed Economic Effects
2 provisions identified: 2 benefits, 0 costs, 0 mixed.
Timestamp Exemption Extended to 2030
If your trading firm records timestamps finer than nanoseconds, you must continue truncating those timestamps to the nanosecond level when submitting data to the Consolidated Audit Trail (CAT). The rule’s expiration date was changed from April 8, 2025 to April 8, 2030, so this truncation requirement remains in effect through April 8, 2030.
No New Competitive Burden Stated
The Exchange states the amendment will not impose any burden on competition and will apply equally to all Industry Members that trade NMS Securities and OTC Equity Securities. The Exchange and other national exchanges and FINRA are making comparable changes, and the Commission made the rule operative on filing.
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