ISO-NE Starts Work on Day-ahead Ancillary Services Market Changes
Day-ahead ancillary services prices: Ten-Minute Spinning Reserve (TMSR), Ten-Minute Non-Spinning Reserve, (TMNSR), Thirty-Minute Operating Reserve (TMOR) and Forecast Energy Requirement (FER) | ISO-NE
Feb 12, 2026
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With costs associated with ISO-NE’s new day-ahead ancillary services market far exceeding expectations, the RTO is working to fast-track changes to improve the efficiency of the market in time for next winter.
