FERC was not persuaded by environmental nonprofits, utilities nor Mississippi regulators to order MISO to rework the sloped demand curve it’s been cleared to use in the spring capacity auction.

Load-serving entities that decide against participating in MISO’s capacity auction must secure anywhere from 1.5% to 4.2% beyond their reserve margin requirements in the 2025/26 planning year.

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.

MISO’s Independent Market Monitor debuted six new market recommendations this year as part of his annual State of the Market report.

As it gears up to run its first auctions using sloped demand curves, MISO said prices and procurement would have risen had it used them in this year’s auctions.

After two requests for more information and nine months, FERC has greenlit MISO’s plan to exchange its current, vertical curve for sloped demand curves in its seasonal capacity auctions.

FERC once again said it needs more information on clearing price caps before MISO can proceed with sloped demand curves in its capacity auctions.

MISO juggled several projects over 2023 designed to fend off imminent reliability problems and will keep up the multitasking in 2024.

FERC wants more description behind MISO’s plan to adopt sloped demand curves for its capacity auctions before it decides the matter.