On Jul. 25, ASX said it will introduce a new trade report mechanism.
ASX will introduce new trade report mechanism for single sided equity exchange traded options (ETO) special size (block) transactions, subject to regulatory approval.
Participants and vendors should prepare to make the necessary changes to meet the Sep. 1, 2025 go-live date.
New Report Mechanism
Allows different trading participants to report opposite sides of special size (block) ETO trade, unlike current requirement where one participant must represent buyer, seller.
Single sided trade reporting already exists in ASX24 derivative markets and is now being extended to ETOs to enhance market liquidity and pricing.
Key rules require the trade to meet the special size threshold, use the SP condition code, involve only single series options, and be reported promptly after agreement.
Fees for the new reports will remain consistent with the existing ETO fee structure.
ASX has modified the ASX trade system to support this feature, including enabling message type MO75 for single sided special size (block) trade reporting.
The new functionality is available for testing in ASX trade external test environment (CDE+), and participants should contact ASX if further system changes are required.
Amended ASX rules to support this change will be released in separate market notice.
Effectiveness
The new mechanism will be effective from Sep. 1, 2025.
In Aug. 2025, ASX issued update re exchange traded options reporting, see #266738.
