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December 25, 2025

Markets

© RTO Insider LLC
Environmental Groups Seek Rehearing of MISO Sloped Demand Curve
The Sierra Club, Natural Resources Defense Council and the Sustainable FERC Project are seeking a rehearing of MISO’s sloped demand curve in its capacity auction.
SPP
FERC Finds SPP Markets+ Tariff ‘Deficient’ in Several Areas
SPP’s Markets+ hit a snag after FERC issued a deficiency letter outlining 16 problems the RTO must address in the tariff it filed for the proposed Western day-ahead market in March.
Sandia National Laboratories
FERC Approves CAISO Request to Lift Soft Offer Cap for Hydro, Storage
FERC accepted CAISO’s proposal to allow for storage resources to bid above the ISO’s $1,000/MWh soft offer cap in the real-time market to account for their intraday opportunity costs.
PJM
PJM Capacity Prices Spike 10-fold in 2025/26 Auction

PJM capacity prices increased nearly tenfold in the 2025/26 Base Residual Auction as a trifecta of load growth, generation deactivations and changes to risk modeling shrank reserve margins.

CAISO
WEIM Yields $365M in Q2 Benefits with Hot Start to Summer
CAISO’s Western Energy Imbalance Market provided its 22 participants with $365.04 million in economic benefits from April to June down 4% from the same period a year ago.
MISO
MISO in June: Unchanged Pricing, Lower Peak than Expected
June brought a 2-GW lower peak than anticipated and unchanged real-time and fuel prices from last year, MISO said in a monthly operations report.
Shutterstock
ISO-NE Capacity Accreditation Reforms Spur Energy Storage Concerns
As ISO-NE undertakes major capacity market accreditation reforms, New England storage developers are voicing concerns that potential flaws in the RTO’s modeling methodology could discourage new investments in storage resources.
© RTO Insider LLC
PJM MRC Briefs: July 24, 2024
The PJM MRC endorsed one of two proposals to revise how the RTO uses reserve resources, approving a deployment scheme where instructions are sent by basepoints, while rejecting a parallel proposal to grant operators the ability to dynamically increase market procurements.
NYISO
NYISO Stakeholders Continue Debate over Battery as Proxy Unit
NYISO analysts continue to recommend a two-hour battery electric storage system resource as the proxy unit for the ISO’s capacity market demand curve.
Entergy
DC Circuit Declines Entergy Challenge of MISO Seasonal Accreditation
The D.C. Circuit Court of Appeals rejected Entergy’s challenge of MISO’s seasonal capacity accreditation and generator outage rules, two years after FERC approved the rules.

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