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Clock Synchronization

This page displays information and forms specific to CAT Clock Synchronization requirements.


  • CAT Clock Certification


  • Original CAT Annual Certification Requirements announcement.

Industry Members are required to complete the CAT Clock Synchronization Certification form by March 15th of each year. Industry Members are not required to submit such certifications to the exchanges or FINRA. Instead, originals of such certifications must be maintained by Industry Members as part of their books and records and be available to regulators upon request. Industry Members who are members of multiple Participants need only make a single clock synchronization certification. 



  • For more information, also see Section R of FAQs.