NBM Indivisible Bids Change (2026)

Nordic Balancing Model notice, “Change to indivisible bids in the Nordic aFRR and mFRR capacity markets will be implemented on 24 November 2026” (published 31 August 2026, nordicbalancingmodel.net), following up a March 2026 notice on the same coming change.

Key findings

The Nordic TSOs are changing how bid indivisibility is expressed in the Nordic aFRR and mFRR capacity markets, to make its use more explicit and improve market efficiency:

• The “Indivisible Bids Allowed” bid attribute is removed.
• The “Minimum Quantity” attribute becomes mandatory for every bid.
• From the change date, all bids are considered divisible by default. To submit what was previously an “indivisible” bid, a BSP now sets Minimum Quantity equal to the offered quantity.
• Implementation: 24 November 2026, applicable to the operational date of 25 November 2026.
• Testing: the new implementation is available in the standard test environment from 15 September 2026 — BSPs are encouraged to test all bid-submission channels (manual UI entry, file upload, ECP).

Relevance to existing wiki topics