ASX participants, vendors and users are advised that on Monday 1 September 2025 a new trade report mechanism will be introduced covering Single Sided ETO Special Size (Block) transactions. The go-live date is subject to receiving regulatory clearance for the corresponding Rule changes and participant / vendor readiness.

Previously, ASX has only allowed Special Size crossings, whereby the reporting trading participant is required to represent both the buyer and seller of the transaction, to be reported. Under the new trade reporting mechanism, different Trading Participants can be part of the Special Size (Block) ETO trade report.

The concept of Single Sided trade reports is already in existence on ASX24 derivative market contracts.

The change is to enable better control to end customers, increase the available/tradable liquidity pool and ultimately obtain better pricing for the market.

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.

Fees for all users of the new trade report will align with the current ETO headline fees contained within ASX’s fee schedule.

To enable this new trade report, ASX has made some configuration changes within ASX Trade to enable participants to enter one side of the transaction to then be matched off against the other side of the transaction. ASX has enabled the MO75 message type to allow for ETO Single Sided Special Size (Block) trade reporting.

ASX has added the new functionality to the ASX Trade external test environment (CDE+) for those vendors and/or participants that would like to test the new “SP” trade report. Whilst the change is expected to be a configuration change only to existing systems, please reach out to ASX if this is not the case.

A copy of the amended ASX Rules will be released via a separate market notice in due course.

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 you have any concerns with the proposed date, please reach out to ASX immediately.

If you experience any issues with testing or have any questions relating to the new reporting functionality, 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

Disclaimer