Regulatory Notice 20-41
Summary
FINRA has amended its rules to require firms to report time fields in trade reports submitted to a FINRA equity trade reporting facility (or FINRA Facility)1 using the same timestamp granularity that they use when reporting to the Consolidated Audit Trail (CAT). Once the amendments are effective, firms that report time on CAT order execution events in increments finer than milliseconds must report to the FINRA Facilities in such finer increment—up to nanoseconds.