U.S. Ethanol Production Drops to Four-Month Low; Inventories Tighten
For the week ending Sept. 18, ethanol output fell sharply while stocks also declined, according to EIA data analyzed by the Renewable Fuels Association.
Useful takeaways from this story.
Weekly ethanol production fell 6.5% to 1.03 million barrels per day (about 43.2 million gallons), the lowest weekly rate since early May.
Ethanol inventories declined 2.1% to 24.7 million barrels, a seven-week low, though still above year-ago and five-year average levels.
Gasoline supplied to the U.S. market rose slightly but remained below both year-ago and five-year-average volumes.
# Quick summary For the week ending September 18, U.S. ethanol production and inventories both fell, according to Energy Information Administration data analyzed by the Renewable Fuels Association. Production dropped to 1.03 million barrels per day — about 43.2 million gallons — a 6.5% weekly decline and the weakest weekly output since early May. Stocks tightened to 24.7 million barrels, a seven-week low. Exports and domestic refiner/blender inputs also moved lower.
# What the numbers show
Inventories: Stocks declined 2.1% to 24.7 million barrels. That level is the lowest in seven weeks but remains higher than both the year-ago level and the five-year average.
Exports and inputs: Ethanol exports fell 24.2% to 122,000 barrels per day. Refiner and blender inputs of ethanol declined to their lowest level in ten weeks.
Gasoline demand signal: Gasoline supplied to the U.S. market edged up slightly week over week but stayed below the comparable year-ago and five-year-average levels.
# Why this matters to markets and producers Lower weekly production combined with reduced inventories tightens near-term supply availability. That can influence plant run decisions, corn demand for ethanol, and short-term pricing dynamics for both ethanol and feedstock corn. The sharp drop in exports weakens an external demand channel, while reduced refiner/blender inputs point to softer domestic blending activity for the period.
# Short-term drivers and context provided by the data
- Inventories remain above last year and the five-year average, which cushions the supply impact of the production decline.
- The combination of lower exports and lower domestic blender inputs suggests demand was the dominant influence on the week's decline rather than a purely supply-side outage.
# Practical implications for stakeholders Producers: Watch forward corn demand signals. If ethanol plant runs remain subdued, ethanol-driven corn usage may moderate.
Ethanol plants and traders: Monitor subsequent EIA weekly reports for signs of production recovery or further inventory draws. Small weekly shifts can change margins quickly.
Fuel market participants: Continued gasoline volumes below year-ago and five-year averages could limit near-term upside for ethanol blending demand unless gasoline consumption picks up.
# What to watch next
- Weekly EIA production and stocks updates for evidence of a rebound or extended weakness.
- Export data to see if the sharp export decline is temporary or part of a larger trend.
# Bottom line Last week's data show a clear near-term pullback in U.S. ethanol production and a drop in stocks, with exports and refiner/blender inputs also lower. Inventories, however, remain above year-ago and five-year averages, which moderates immediate supply concerns. The coming weeks' EIA releases will indicate whether this is a transient dip or the start of a more sustained slowdown.
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