# Refinements to Horizontal Market Power Analysis for Sellers in Certain Regional Transmission Organization and Independent System Operator Markets
> **US Department of Energy** · Order on rehearing and clarification. · Published 2020-03-06 · Effective 2020-05-05 · 85 FR 13009
## Document
- **Document number:** 2020-03929
- **Category:** other
- **Sub-agency:** US Department of Energy
- **Federal Register citation:** 85 FR 13009
- **CFR reference:** 18 CFR 35
- **Publication date:** 2020-03-06
- **Effective date:** 2020-05-05
- **Energy docket:** Docket No. RM19-2-001
## Abstract

In this order on rehearing, the Federal Energy Regulatory Commission grants clarification in part and denies rehearing of certain revisions to its regulations regarding the horizontal market power analysis required for market-based rate sellers that study certain Regional Transmission Organization or Independent System Operator markets and submarkets therein.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/03/06/2020-03929/refinements-to-horizontal-market-power-analysis-for-sellers-in-certain-regional-transmission)
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