FINRA CAT/NMS Reporting Obligations Made Easy

What CAT actually requires

FINRA's Consolidated Audit Trail under SEC Rule 613 requires industry members to capture and report every order event with synchronised timestamps traceable to NIST UTC. The reporting obligations are continuous, the daily volumes are significant (the largest CAT reporters submit hundreds of millions of events per day), and the audit defence has to hold up months or years after the events themselves. Industry members operating high-frequency trading strategies face a tighter expectation in practice — generally 100 microseconds, aligned with MiFID II — even where the rule text is less specific.

The headline accuracy requirement (within 50 milliseconds of NIST UTC for most events) is not the hard part. Modern PTP infrastructure delivers materially better than 50 milliseconds without effort. The hard part is everything around the precision: continuous metric capture, long-term audit trail storage, the ability to produce historical evidence for any specific event on demand, and the procedural controls that demonstrate the firm is operating the timing fabric correctly.

Where firms get tripped up

Three common failure modes recur in CAT compliance discussions. First, traceability documentation: the firm achieves the precision but can't produce a documented chain from the local clock back to NIST UTC. NTP from a public pool is the most common version of this — the precision is fine but the traceability isn't documented.

Second, audit retrieval: the firm captures live timing metrics but doesn't store them in a queryable, tamper-evident form for the regulatory retention period. When FINRA asks about a specific event from eighteen months ago, the firm needs days to assemble the evidence rather than producing it on demand. This is the gap that turns routine examinations into difficult ones.

Third, failover documentation: the firm runs redundant grandmasters but has never documented the failover behaviour or tested it in a controlled exercise. When the next examination asks "what happens when the primary grandmaster fails?", the firm doesn't have a confident, evidence-backed answer.

What good operations looks like

A FINRA CAT timing fabric that holds up under examination has six load-bearing components. A primary reference time clock on the firm's premises (GNSS-disciplined hardware grandmaster). A documented synchronisation chain from the PRTC to every reportable system. Continuous metric capture from every clock on the timing path. Long-term tamper-evident storage of the metrics for at least the regulatory retention period. Pre-built audit reports keyed to the questions FINRA actually asks. Documented and tested failover procedures for the grandmaster pair.

Each of these is straightforward to deploy in isolation. The challenge is operating all six together as a continuously monitored production service rather than a once-and-done installation. This is the operational discipline that the TimeBeat Sync Insight platform exists to support — and where many firms with otherwise capable timing infrastructure have a gap.

Where TimeBeat fits

TimeBeat builds open-standard PTP grandmasters and the Sync Insight observability platform used by US trading firms to meet FINRA CAT and SEC Rule 613 reporting obligations. The hardware delivers the precision; the software handles the operational layer that turns precision into audit evidence. For firms preparing for a CAT examination or trying to close the gaps between current state and audit-ready state, the engineering team is happy to walk through what good looks like.