ASX participants, vendors and users were advised via Market Notice 0789.25.07 that on Monday 1 September 2025 a new trade report mechanism will be introduced covering Single Sided ETO Special Size (Block) transactions.

ASX has now received regulatory approval for the introduction of the new “SP” trade reporting for Single-Sided Block (Special Size) ETOs.

Under the new trade report mechanism, the following rules apply:

·        ETO Special Size (Block) level will need to be met.

·       “SP” condition code to be used for trade reporting.

·       Covers single series options only.

·       Reporting of transactions to occur “promptly’ once trade has been agreed between parties.

Please find attached the marked-up ASX Operating Rule procedures to allow for the introduction of the new trade reporting functionality for ETO Block (Special Size) Transactions along with some miscellaneous rule and procedures changes. The rule changes will come into effect on Monday 1 September 2025 to align with the go-live date.

Note: there is no change to the existing ETO Special Size (Block) Crossings mechanism.

Fees for all users of the new trade report will be the current ETO headline fee contained within ASX’s fee schedule. Volume transacted via the new trade report will also be eligible for inclusion into the calculation of ETO Large Volume Rebates (LVR) on Single Stock Classes.

Vendor and Participant testing for this new trade report mechanism is optional but recommended for those wanting to utilise the new trade type. ASX’s external test environment (CDE+) is still available to those wanting to test.

What do I need to do by when?

Participants and vendors should prepare to make the necessary changes to meet the 1 September 2025 go-live date if planning to utilise the new trade report functionality.

If you have any questions relating to the new trade reporting, please contact Gregory Pill or your assigned ASX Technical Account Manager (TAM).

Need more information?

Issued by

Gregory Pill – Head of Equity Derivative Products & Multi Asset Market Making

Contact information

Gregory Pill
+61 (02)  9227 0696
greg.pill@asx.com.au

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