Treasury, IRS issue proposed regulations on the clean fuel production credit under the One, Big, Beautiful Bill

The Treasury and IRS issued proposed regulations implementing the clean fuel production credit (often called 45Z) under the One, Big, Beautiful Bill, clarifying eligibility, emissions rates, certification and registration requirements for fuel produced after Dec. 31, 2024 and sold by Dec. 31, 2029; taxpayers must register with Form 637 at production. Key changes include extending the credit to Dec. 31, 2029, limiting eligible feedstocks to those grown or produced in the U.S., Mexico or Canada, adding prohibited foreign-entity restrictions and anti‑abuse rules, broadening sale attribution through intermediaries, removing the special sustainable aviation fuel rate, prohibiting negative emissions rates except for animal manure (with feedstock-specific rates), and excluding indirect land-use changes from emissions rates. Treasury/IRS are soliciting public comments and will hold a hearing on the proposed regs.

Analysis

Market structure: Domestic renewable-fuel producers and integrated refiners with onshore feedstock access are primary winners — expect a 5–15% lift to per-gallon economics for qualifying producers through 2029 because the credit effectively raises revenue and reduces competition from non‑North American feedstocks. Losers include exporters and pure-play SAF developers that relied on the eliminated special-rate and non‑North American feedstocks; downstream buyers (airlines) face less predictable SAF pricing. The feedstock restriction tightens regional supply, likely raising corn/soy/animal‑manure demand and putting upward pressure on related commodity prices (expect 5–20% range risk across 12–24 months). Cross-asset: tighter domestic fuel supply is marginally inflationary for commodities, modestly supportive for energy credits/bond yields in the near term, and increases volatility in related equity options markets.

Risk assessment: Tail risks include legal challenges or reversal of domestic-content rules, feedstock price shocks (corn jump >30% if acreage shifts), or aggressive anti‑abuse enforcement producing retroactive clawbacks. Immediate (days-weeks): registration and certification bottlenecks could delay credit monetization; short-term (months): public comment/final regs will move markets; long-term (years): capex cycles and feedstock constraints determine winners. Hidden dependencies: emissions-rate methodology (esp. manure feedstock) will create winners among niche players and influence of state nutrient/land policies; third-party verification capacity could become a bottleneck. Key catalysts: IRS final regs (~3–6 months), Form 637 registration volumes, and published feedstock-specific emissions rates.

Trade implications: Direct longs — favor Darling Ingredients (DAR) and large refiners with renewable diesel capacity (Valero VLO, Marathon MPC) via 6–18 month exposure: target 1–3% position sizes each, using call spreads to cap premium. Pair trade — long VLO (1.5%) / short GEVO (GEVO) (0.5%) to express preference for scale and feedstock control over SAF pure‑plays; use 9–12 month GEVO puts to limit capital. Commodities — allocate 1–2% to CORN (Teucrium CORN or long front‑month corn futures) to hedge feedstock inflation; reduce exposure if corn rallies >15% intra‑quarter. Entry: stagger initial 50% within 2–4 weeks post-comment period, add on publication of final regs (within 90–120 days).

Contrarian angles: The market may underprice the constraint that negative emissions are banned except for manure — specialized manure-to-fuel players could capture outsized margins but are operationally constrained, creating asymmetric upside for trophy assets. Conversely, consensus may overestimate supply response; building renewable diesel capacity takes 12–36 months and feedstock limits mean credits could create a multi-quarter supply squeeze and higher commodity volatility rather than immediate oversupply. Historical parallel: early 45Q carbon-credit rules produced a short-term rush, then consolidation — expect consolidation among small SAF developers. Unintended consequence: aggressive demand for manure feedstocks could create local regulatory pushback and spatial price dislocations, favoring vertically integrated players.

Key Decisions for Investors

• Establish a 2–3% long position in Darling Ingredients (DAR) with a 9–18 month horizon; implement a 1:1 bull call spread (buy 9–12 month ATM call, sell higher strike) to cap premium and target a 25–40% upside while limiting downside to ~25% max loss.
• Allocate 1.5–2% to Valero Energy (VLO) and 1% to Marathon Petroleum (MPC) (renewable diesel exposure); hedge with 0.5% notional short in GEVO via 9–12 month put options to express preference for scale and feedstock control over pure‑play SAF risk.
• Add 1–2% exposure to corn via Teucrium Corn (CORN) or front‑month futures to hedge feedstock tightness; scale out if corn rallies >15% within a quarter or if on‑farm inventories rise by >10% y/y in USDA reports.
• Do not materially increase positions until IRS publishes final regs (expect within 90–120 days); if Form 637 registrations accelerate to >50 new domestic producer filings/month or published emissions rates materially favor manure (>$0.20/gal credit uplift), increase target weights by 50%.