Planned Industry Member Technical Specification Updates

6/29/2026

Support reporting for combined options (simple and multi-leg) order workflows where there is no systemic link between customer/client orders and representative firm orders.

• Add representativeInd field value ‘OE’ to MONO and MOOM events.
• Add representativeInd field value ‘OME’ to MLNO and MLOM events.
• Add fulfillmentLinkType field values ‘OE’ and ‘OME’ to MOOF and MOFA events.
• Add fulfillmentLinkType of ‘OME’ to MEOF and MEFA events.
• Add firmDesignatedID and accountHolderType fields to MOOF and MOFA events.

Pursuant to the Commission's order granting Exemptive Relief, dated January 23, 2026, all RFQ responses that are communicated in standard electronic format directly to an Industry Member's OMS/EMS or to an RFQ platform and that are not "immediately actionable" (i.e., further action is required before a trade can be executed/routed), to the extent such responses are considered "orders" reportable pursuant to Rule 613(j)(8), are no longer required to be reported to CAT:

• Remove MONQ, MORQ, MOQR, MOQC, MOQM, MLNQ, MLRQ, MLQS, MLQR, MLQC, MLQM events
• Retire bidRelativePrice, askRelativePrice, RFQFlag, validUntilDuration fields
• Retire Error Codes 2249, 2254, 2255, 2256, and 2257
• Remove any other related guidance