Corn Prices Rise as Brazil Crop Forecast Jumps While US Harvest Faces Weather Risk

Today Markets Analysis: Corn futures edged higher on Tuesday, with December 2026 corn rising 2½ cents to $5.3575 per bushel, as the grain complex recovered alongside a sharp increase in crude oil prices. The move came despite a potentially bearish supply outlook from Brazil, where CONAB increased its 2025/26 production estimate and issued an initial 2026/27 forecast above the USDA’s current projection.

At the same time, wet weather across parts of the US Corn Belt could slow early harvest activity, creating a near-term supply and logistics consideration for the market.

Corn Futures Recover as Grains and Oil Strengthen

December corn futures closed at $5.3575, while March 2027 corn settled at $5.5025 and May 2027 at $5.5675.

The gains followed a weaker morning session, with corn finding support alongside the broader grain complex and a $4.09-per-barrel increase in crude oil.

Nearby cash corn also strengthened, rising 3 cents to approximately $4.905 per bushel.

The market is now balancing short-term harvest conditions against increasingly large South American production expectations.

Bullish Sentiment

Several factors are providing support to corn prices:

• US harvest delays: Rainfall of 1–3 inches is expected across parts of Kansas, Nebraska, South Dakota, Iowa and the eastern Corn Belt, potentially slowing early harvest progress.
• Wet conditions: Heavy precipitation in Minnesota, Wisconsin and Missouri could create additional harvesting and field-access problems.
• Crude oil strength: Higher energy prices can support agricultural commodity values through increased production, transportation and ethanol-related costs.
• Harvest uncertainty: Delays to fieldwork can temporarily restrict the flow of newly harvested corn into the physical market.
• Strong deferred prices: March and May contracts remain above December, indicating continued value further along the forward curve.

Bearish Sentiment

The supply outlook is becoming increasingly difficult for corn bulls:

• Brazil’s 2025/26 crop forecast increased: CONAB raised its estimate by 1.04 million tonnes to 144 million tonnes.
• Large 2026/27 Brazilian crop: CONAB’s initial forecast stands at 148 million tonnes.
• CONAB exceeds USDA: The Brazilian forecast is 9 million tonnes above the USDA’s 139 million-tonne estimate.
• Expanding South American supply: A larger Brazilian crop increases competition with US corn in global export markets.
• Harvest is approaching: Once weather allows fieldwork to accelerate, additional US supply could enter the physical market.
• Higher production expectations: Larger Brazilian output could increase global availability and limit the upside potential for futures.

Brazil’s Corn Crop Becomes a Major Supply Signal

CONAB’s latest figures are particularly important because Brazil is becoming an increasingly significant supplier to the global corn market.

The agency raised its 2025/26 production estimate to 144 million tonnes, an increase of 1.04 million tonnes from its previous forecast.

More importantly, CONAB’s initial 2026/27 estimate of 148 million tonnes is substantially above the USDA’s current projection of 139 million tonnes.

That nine-million-tonne difference creates an important forecasting gap for traders. If Brazilian production ultimately approaches CONAB’s estimate, the additional supply could increase export availability and place pressure on international corn prices.

US Harvest Weather Creates a Near-Term Supply Risk

Weather is becoming increasingly important as the US harvest gets underway.

Forecast rainfall of 1 to 3 inches across parts of Kansas, Nebraska, South Dakota, Iowa and the eastern Corn Belt could slow fieldwork during the coming week.

Heavier totals are expected across Minnesota, Wisconsin and Missouri, potentially creating more significant harvesting and transportation challenges.

For corn prices, the effect depends on how long the disruption lasts.

A short-lived delay could simply postpone deliveries without materially changing total production. A more persistent period of wet weather, however, could increase concerns about harvest quality, field losses and the timing of physical supply reaching the market.

Crude Oil Adds Support to Agricultural Commodities

Crude oil gained $4.09 per barrel on Tuesday, providing an additional supportive influence across the commodity complex.

Higher energy prices can increase the cost of farming inputs, transportation and grain handling. Oil is also closely connected to the economics of ethanol production, making energy-market developments particularly relevant to US corn demand.

However, the impact of higher crude prices must be weighed against the potentially bearish effect of larger Brazilian corn supplies.

Brazil and the US Set Up a Global Supply Competition

The corn market is entering a period where US harvest progress and Brazilian production expectations will increasingly interact.

The US remains a major global corn supplier, but Brazil’s large crop has strengthened its position in international trade.

If US harvest delays restrict near-term availability while Brazilian production continues to expand, the two markets could produce opposing signals: tighter immediate US physical supply versus greater global availability further ahead.

That dynamic is likely to keep corn futures sensitive to both weather forecasts and production revisions.

What Traders Are Watching Next

Corn traders will be focused on:

1. US harvest progress as rainfall moves across the Corn Belt.
2. Crop conditions and harvest yields once more fields are brought in.
3. CONAB’s Brazilian production updates following the new 2026/27 estimate.
4. The USDA’s response to the nine-million-tonne difference between its forecast and CONAB’s projection.
5. Brazilian export competitiveness as the new crop enters the market.
6. Crude oil prices, particularly given their influence on ethanol economics and agricultural costs.
7. The December-to-deferred futures structure for indications of changing supply expectations.

Currency Hedger View

Corn is a globally traded commodity, meaning movements in the US dollar and producer-currency exchange rates can influence export competitiveness and margins.

For grain traders, exporters, processors and agricultural businesses, combining commodity-price hedging with FX risk management can help reduce the impact of simultaneous moves in corn futures and currency markets.

Currency Hedger — www.currencyhedger.com

Market analysis contributed by Currency Hedger, an Octalas Group division specialising in foreign exchange, currency risk and hedging.

Today Markets View

Corn is currently caught between near-term weather support and an increasingly comfortable medium-term supply outlook.

Wet conditions could slow the US harvest and temporarily restrict physical availability, while stronger crude oil prices are adding support to the broader commodity complex. However, CONAB’s new Brazilian forecasts introduce a significant bearish consideration, particularly with the 2026/27 crop estimated at 148 million tonnes versus the USDA’s 139 million tonnes.

The next major question is whether US harvest disruption can generate enough short-term tightness to offset expectations for expanding Brazilian supply.

“Corn has near-term support from wet US harvest conditions and stronger energy prices, but Brazil’s rising production outlook is becoming an increasingly important bearish factor. The market is therefore balancing immediate supply disruption against a potentially larger global supply base.” — Louis Roche, Analyst, Today Markets

Bottom Line

Corn prices edged higher Tuesday as wet US harvest conditions and stronger crude oil supported the grain complex.

The bullish case is centred on potential harvest delays, higher energy prices and temporary restrictions on new-crop supply. The bearish case is increasingly driven by Brazil, where CONAB forecasts 144 million tonnes for 2025/26 and 148 million tonnes for 2026/27, with the latter significantly above the USDA estimate.

For now, US harvest weather is the immediate driver, while Brazilian production expectations represent the larger medium-term supply risk.

Analysis by Louis Roche, Analyst, Today Markets

Market analysis contributed by Currency Hedger, an Octalas Group division specialising in foreign exchange, currency risk and hedging.

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