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EU · eu-cacm-market-algorithms-2026

ACER review of NEMOs’ EU market-algorithm amendment remains underway

Regulatory review
ENERGY MARKETSMULTI-TIMEFRAMEALGORITHMFLOW-BASED CAPACITYMARKET COUPLINGINTRADAY AUCTIONSCACMEU
1Problem identified
2Consultation
3Proposal
4Regulatory review
5Decision
6Implementation
7Go-live
8Market impact
What changed

No material change versus the prior event state. The supplied ACER notice confirms the existing stakeholder-feedback deadline of 31 August 2026 and ACER’s expected decision date of 21 January 2027.

Why it matters

The proposed changes—three intraday auctions using flow-based capacity calculation, a concrete implementation deadline for flow-based allocation in intraday auctions, and revised timing for publication of single day-ahead coupling results—remain subject to ACER’s regulatory decision.

Design impact
Price formation●●○
Cross-border capacity●●●
Liquidity●●○
Operational security●○○
Market participants●●●
Affected markets
EU DAY-AHEADEU INTRADAY
Who is affected
NEMOsTSOsMARKET PARTICIPANTS
MD analysis

The event remains at regulatory review. If adopted, the amendments could materially affect intraday auction design, cross-border capacity allocation and the timing of day-ahead market-coupling outputs; however, the source does not establish the final methodology or an implementation date.

Rule / framework

CACM

Next milestone

ACER decision on the NEMOs’ market-algorithm amendment · 21 Jan 2027

Primary sources

ACER · REGULATOR · 2026-07-29

ACER to decide on changes to the methodology for EU day-ahead and intraday market algorithms

Open primary source ↗
acer-a43063f3fbecf7b83c40418b
ACER · REGULATORY_REVIEW · 2026-07-29

ACER to decide on changes to methodology for EU day-ahead and intraday market algorithms

Open primary source ↗
acer-cacm-algorithm-2026-v11-test
ACER · REGULATORY_REVIEW · 2026-07-29

ACER to decide on changes to methodology for EU day-ahead and intraday market algorithms

Open primary source ↗
acer-cacm-algorithm-2026-test