NEMO Committee confirms Price Tick Size (PTS) corrective measure approved but not yet activated in SIDC

NEMO Committee published a status update confirming that the Price Tick Size (PTS) adjustment corrective measure for the Single Intraday Coupling (SIDC/XBID) has been approved as a Corrective Measure but will not be activated as of 1 October 2026, with PTS remaining at its ordinary level of 0.01 EUR/MWh. Activation remains contingent on a future MCSC decision, and the detailed activation process (latency thresholds, member notice periods, activation duration) is still under definition.

PTS directly affects price formation granularity and matching precision in the pan-European intraday market coupling (SIDC/XBID). Its potential activation as a corrective measure signals that NEMOs are building a formal, MCSC-governed toolkit to address production performance issues in intraday coupling, which could affect price formation, order matching behavior, and market participant systems once activated, even though no change takes effect on the stated date.

This event tracks a distinct operational-parameter corrective mechanism within SIDC governance, separate from structural market coupling changes (e.g., new NEMO participation). The framework has cleared an internal approval stage (approved as a Corrective Measure) but implementation mechanics—activation triggers, notice periods, and duration—remain undefined, placing this in an IMPLEMENTATION-stage limbo where the tool exists but is not yet operational or fully specified. Market design analysts should watch for the forthcoming MCSC governance criteria, as these will define how and when tick size changes could be imposed on XBID market participants, with direct implications for price formation granularity in intraday coupling.

SIDC Algorithm Methodology (Corrective Measures framework), MCSC governance

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