ASX Australian Electricity Options Strike Interval Changes Go Live on 18 August 2025
Mon 11 Aug 2025
As per Notice 0874.25.08, Following the market notice 0716.25.07, ASX will implement changes to strike increments and interval settings for the Australian Electricity Average Rate Base Load (Quarterly) Options (BN, BQ, BV, BS), Calendar Year Base Load Strip Options, and the Financial Year Base Load Strip Options (HN, HQ, HV, HS) on 18 August 2025.
- Strikes up to $100 will be listed in $1 increments
- Strikes above $100 will be listed in $5 increments
- 25 strikes will be listed on either side of the reference price
The proposed change will, over time, improve the Options Daily Settlement Price calculation by reducing the number of strikes without open interest. Furthermore, when auto-listing, it will provide a wider strike range without increasing the number of strikes, decreasing the need for ad-hoc strike requests.
Market participants can request strike extensions outside auto-listed strike range. For example, if strikes are listed up to $150, Participants can request ASX to extend the strikes to $200, where ten $5 strikes will be listed between $150 and $200.
Market participants can request a single strike, following the strike increment settings, i.e., $1 increments up to $100 and $5 increments above $100. For example, if strikes are auto-listed up to $150 following the increment settings, participants can request a single strike, such as $165, without filling in the gap.
Market participants can request a single strike at a specific price that does not follow the strike increment settings, i.e. $1 increments up to $100 and $5 strike increments above $100. For example, if strikes are auto-listed up to $150 following the increment settings, participants can request a single strike, such as $122 or $201.
Existing Electricity Option strikes listed at the $1 increment, existing Option positions and Open Interest will remain unaffected.
What do I need to do by when?
Market Participants are encouraged to review the ASX 24 procedure changes prior to August 18th and ensure that their systems and processes are ready to handle the change.
Market participants are reminded that the requests for option strike extensions are to be submitted to tradingoperations@asx.com.au in the ASX Energy Options Strike Request Template by 10:30am Sydney time to be listed for trading the following business day (T+1). Any requests received after this time will be processed for listing on T+2 only.
Need more information?
Issued by
Harish Chandilyan, Product Manager, Commodities
Contact information
commodities@asx.com.au
or
Investor Support
(02) 9338 0000
www.asx.com.au/contact