Summary
EPEX SPOT, BSP SouthPool, HUPX, SEEPEX and SEMOpx are updating their auction trading system for Day-Ahead and Intraday Auctions from ETS to the web-based “Multiple Auction Trading System” (MATS). The Go-Live of MATS is expected in a staggered way by End of August / Begin of September 2025.
All details on the planned dates for Go-Live and first trading days in the new auction system as well as all technical information on the system transition relevant for trading participants can be found in the corresponding EPEX SPOT Info, which was distributed to all EPEX and partner exchange customers in May 2025. ECC will inform all affected parties again with a dedicated circular in the weeks before the Go-Live.
This system transition is also an opportunity to simplify the trading limit configuration settings in ECC Member Area to fit best with the current usage by Clearing and Settlement Members.
For this reason, Min/Max Order Price, Portfolios and Instrument optional fields will be deactivated for clarity purposes and additional restrictions controls will be added so only one trading limit currency (EUR or GBP) can be set to facilitate the application of trading limit management recommendations.
To ensure a smooth transition, any limits impacted by these changes will need to be updated prior to the activation of the MATS trading system. A detailed description of the required actions is provided at the end of this circular.
Please find detailed information in the document below.