A bill to amend the Clean Air Act to preserve consumer vehicle choice, protect the electric grid, and impose limits on regulations under that Act, and for other purposes.
Summary
Sen. Lee introduced S4931 to amend the Clean Air Act, limiting EPA's ability to regulate vehicle emissions and power plants. The bill is in early stage with low near-term passage probability, but signals potential regulatory relief for traditional automakers and fossil fuel utilities.
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Key Takeaways
- 1.S4931 proposes regulatory relief for ICE automakers and fossil fuel utilities by limiting EPA Clean Air Act authority.
- 2.The bill is in early stage (referred to committee) with low passage probability in a divided Congress.
- 3.Winners: $F, $GM, $DUK, $AEP, $XOM; Losers: $TSLA.
- 4.No direct funding; market impact is solely through relaxed compliance requirements.
Market Implications
If S4931 gains traction, traditional automakers $F and $GM could see 5-10% upside from reduced EV compliance costs, while coal-heavy utilities $DUK and $AEP benefit from extended plant life. Tesla $TSLA faces headwinds from slowing EV adoption and lost regulatory credit revenue, estimated at 5-8% of revenue. Given the early stage, these moves are unlikely until committee markup, currently not scheduled.
⚡ Government Convergence
This signal is one of the converging government actions below.
Over the last 90 days, 158 separate government actions have converged on Grid / Transmission Buildout. What that means: federal dollars are already moving — agencies are soliciting bids and awarding contracts, not just talking, and legislation and executive action are building the policy and funding tailwind behind it. When independent channels move together like this — 141 procurement notices, 9 federal contracts, 6 bills, 1 executive actions and 1 patents — it's the clearest early tell that Washington is committing to grid / transmission buildout, the kind of build-up that reshapes the sector well before it's obvious in the headlines.
Converging government actions
- ContractPOTOMAC ELECTRIC POWER CO: $117M Department of Health and Human Services Contract · 2024-09-26
- BillSMARTER Act · 2025-02-07
- BillCIRCUIT Act · 2025-06-25
- BillPROTECT the Grid Act · 2026-01-23
- Executive actionPresidential Memorandum: Presidential Determination Pursuant to Section 303 of the Defense Production Act of 1950, as Amended, on Grid Infrastructure, Equipment, and Supply Chain Capacity · 2026-04-20
- Procurement noticeY--North Gunnison Substation 115kV Switch Installation · 2026-05-04
- Procurement noticeY--Sidney Substation Breaker Replacement · 2026-05-04
- Procurement noticeSources Sought - Transformer Refurbishment for WAPA Tracy Substation (Byron, CA) · 2026-05-05
- Procurement noticeAnnual Transformer Oil Sampling and Analysis Contract. · 2026-05-11
- Procurement noticeY--Carpenter Substation Stage 03 South Dakota · 2026-05-11
- Procurement noticeTRANSFORMER,POWER 5950-01-511-4482 · 2026-05-12
- Procurement noticeY--Cottonwood Substation Construction, Stage 02, Phase 01 · 2026-05-12
- Procurement noticeY--Denison Substation Stage 10, Iowa · 2026-05-13
- Procurement noticeY--Weld Substation Stage 05 · 2026-05-20
Full Analysis
On June 24, 2026, Sen. Mike Lee (R-UT) introduced S4931, a bill to amend the Clean Air Act to preserve consumer vehicle choice and protect the electric grid by imposing limits on EPA regulations. The bill was read twice and referred to the Committee on Environment and Public Works, where it awaits markup. No companion bill has been introduced in the House. The bill does not authorize or appropriate any funding; its market impact stems solely from regulatory relaxation. If enacted, the bill would restrict EPA's ability to set stringent vehicle emissions standards and power plant rules, reducing compliance costs for internal combustion engine (ICE) automakers and coal/gas utilities. Conversely, electric vehicle (EV) makers like Tesla lose regulatory tailwinds and credit revenue. Due to the early legislative stage—referred to committee, no hearings scheduled—passage is uncertain. The 119th Congress is divided, with a Republican-majority House and Democratic Senate, making significant Clean Air Act amendments unlikely. Key beneficiaries include Ford ($F) and GM ($GM), which rely on ICE vehicle sales and face heavy EV compliance costs, and utilities like Duke Energy ($DUK) and American Electric Power ($AEP) with large fossil fuel fleets. Oil major ExxonMobil also benefits from sustained fuel demand. Tesla ($TSLA) is the primary loser, facing reduced EV adoption pressure and regulatory credit sales. The timeline for S4931 is extended; committee hearings may occur in late 2026, but floor action is improbable before the 2026 midterms. Investors should view this as a speculative signal of regulatory rollback, not a near-term catalyst.
Intelligence Surface
Cross-referenced against federal contracts, SEC insider filings & congressional trade disclosures
Some confirming evidence found across public data sources
What the bill does
Relaxation of EPA vehicle emissions standards under the Clean Air Act
Who must act
Automobile manufacturers subject to EPA light-duty vehicle greenhouse gas standards
What happens
Reduced compliance costs from avoiding expensive electric vehicle and hybrid production requirements; extended ability to sell internal combustion engine vehicles
Stock impact
Ford's product portfolio is heavily reliant on high-margin ICE pickups and SUVs (F-150, Explorer); relaxed standards allow Ford to continue selling these without incurring penalties or forced EV transition costs
What the bill does
Relaxation of EPA vehicle emissions standards under the Clean Air Act
Who must act
Automobile manufacturers subject to EPA light-duty vehicle greenhouse gas standards
What happens
Reduced compliance costs from avoiding expensive electric vehicle and hybrid production requirements; extended ability to sell internal combustion engine vehicles
Stock impact
GM's revenue from ICE trucks and SUVs (Silverado, Tahoe) is substantial; relaxed standards reduce pressure to accelerate EV production, preserving profitability from legacy vehicle sales
Key Legislators
Connected Signals
Matched on shared policy language across AI analyses, with ticker & timing weight
Presidential Memorandum: Presidential Determination Pursuant to Section 303 of the Defense Production Act of 1950, as Amended, on Grid Infrastructure, Equipment, and Supply Chain Capacity
PACIFICORP: $122M Department of Energy Grant
ENTERGY NEW ORLEANS, LLC: $124M Department of Energy Grant
PACIFICORP: $287M Department of Energy Grant
To accelerate the modernization of the national electric grid by supporting advanced conductors and related systems, and for other purposes.
HAWAIIAN ELECTRIC COMPANY, INC.: $92.6M Department of Energy Grant
To amend the Clean Air Act to preserve consumer vehicle choice, protect the electric grid, and impose limits on regulations under that Act, and for other purposes.
To amend the Federal Power Act to authorize the allocation of the costs of certain interstate electric power transmission lines and electric power transmission lines that are located offshore, and for other purposes.
Related Presidential Actions
Executive orders & memoranda affecting the same sectors or companies
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Ending Birth Tourism
This executive order directs the Secretaries of State and Homeland Security to prevent foreign nationals from entering the U.S. on nonimmigrant visas for the purpose of giving birth (birth tourism), including revoking visas, barring entry, and taking action against facilitators. It defines birth tourism as entry via nonimmigrant visa for childbirth and allows humanitarian or national interest exemptions.
Adjusting Imports of Polysilicon and its Derivatives into the United States
This proclamation invokes Section 232 of the Trade Expansion Act to impose a minimum import price (MIP) program on polysilicon and its derivatives, a 15% ad valorem tariff on polysilicon derivatives, and directs the Secretary of Commerce to offer incentives for domestic production. It aims to protect and revive the U.S. polysilicon industry by restricting imports that threaten national security, particularly for semiconductor and solar supply chains.
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