September WASDE: Corn Tightens, Wheat Loosens as Global Stocks Beat Market Expectations

USDA’s September WASDE delivered sharply different signals across the three major crops. Corn remains the tightest balance, wheat moved noticeably looser, while soybeans became slightly more supportive. Yet one factor was common across all three markets: global ending stocks came in above trade expectations.

The September WASDE brought a clearer divergence between global wheat, corn and soybean fundamentals.

For 2026/27, USDA raised global wheat ending stocks, while cutting inventories for both corn and soybeans. Compared with last season, however, corn still shows by far the largest contraction in global stocks, while soybean inventories are only modestly lower.

The immediate market surprise came from the comparison with pre-report expectations. Global ending stocks were above the average trade estimate for all three crops: wheat by 2.83 MMT, soybeans by 0.96 MMT and corn by 0.51 MMT.

That makes wheat the clearest bearish surprise, while the higher-than-expected figures for corn and soybeans are less significant relative to the broader tightening in their balances.

Wheat: Larger Exporter Crops Push The Global Balance Looser

The September wheat update was the least supportive of the three markets.

USDA raised 2026/27 global wheat production by more than 3 MMT from August, with several major exporters accounting for most of the increase. Australia received the largest revision, with production raised 3 MMT to 31 MMT on favorable crop conditions. Canada was increased 1 MMT to 36 MMT, while Ukraine gained another 0.6 MMT to 26 MMT as harvest results pointed to record yields.

Kazakhstan partly offset those gains, with production reduced by 1 MMT.

Higher supply was accompanied by only a modest increase in global consumption. Feed and residual use moved higher, but this was not enough to absorb the additional availability.

At the same time, USDA cut projected global wheat trade by 0.9 MMT to 211.8 MMT. Exports from Russia and Ukraine were reduced following weak August shipments as continued Black Sea disruptions constrained logistics. Kazakhstan exports were also lowered, while Australia, Canada and Argentina received increases.

As a result, global ending stocks climbed by just over 3 MMT from August to 276.29 MMT.

This was also the biggest surprise relative to market expectations. Traders had expected 273.46 MMT, with the published trade range at 271.3–276.3 MMT. USDA therefore came in almost 2.8 MMT above consensus and effectively at the top of the expected range.

The U.S. wheat balance was unchanged in aggregate, although USDA adjusted exports between wheat classes. The season-average farm price was raised by $0.20 to $6.40 per bushel.

Market takeaway: larger crops among major exporters, weaker projected trade and a stock figure well above expectations leave wheat with the loosest balance and the strongest bearish surprise in the September report.

Corn: The Tightening Story Remains Intact

Corn delivered a very different message.

USDA cut 2026/27 global corn production by almost 8 MMT from August, while global ending stocks were reduced by 2.56 MMT to 272.10 MMT.

The U.S. accounted for an important part of the supply reduction. Corn production was lowered by 213 million bushels to 15.8 billion bushels, mainly because yield was cut by 2.2 bushels per acre to 178.5 bushels per acre.

USDA also reduced feed and residual demand by 150 million bushels, but this was not enough to offset the smaller supply. U.S. ending stocks were cut by another 86 million bushels to 1.6 billion bushels, while exports were left unchanged at 3.3 billion bushels despite the smaller crop.

The season-average U.S. corn price was raised $0.30 to $4.80 per bushel.

Outside the United States, production was lowered for India, Kenya and Russia, partly offset by better prospects in the EU and elsewhere. USDA also reduced Brazilian corn exports as higher domestic ethanol use absorbs more supply.

Globally, the tightening remains significant. September ending stocks are almost 29 MMT below the 2025/26 level shown in the latest balance sheet.

Still, the report did not produce a major bullish surprise versus expectations. Global stocks of 272.10 MMT were about 0.5 MMT above the average analyst forecast of 271.59 MMT, comfortably inside the expected range of 268.5–274.6 MMT.

Market takeaway: corn remains the strongest tightening story of the three crops. The smaller U.S. crop and another decline in inventories are supportive, although the stock figure itself was slightly higher than the market expected.

Soybeans: Higher Exports Absorb The Increase In Supply

The soybean balance moved modestly tighter despite another increase in production.

Global soybean output was raised slightly to 442.35 MMT, while crush, exports and imports were all revised higher. Global exports received the largest demand-side adjustment, increasing by more than 1 MMT from August.

The U.S. balance also became tighter. Soybean production was increased by 16 million bushels as both harvested area and yield moved slightly higher, but the export forecast was raised by a larger 25 million bushels to 1.69 billion bushels.

With crush unchanged, stronger exports were enough to reduce U.S. ending stocks by 10 million bushels to 310 million bushels.

USDA also lifted the U.S. season-average soybean price by $0.60 to $12.00 per bushel, while the soybean meal forecast increased by $30 per short ton.

At the global level, ending stocks slipped to 124.02 MMT, down slightly from August and around 1.25 MMT below the previous season.

However, just as with corn, the report was not as tight as traders had anticipated. Analysts had expected global soybean stocks of 123.06 MMT, putting USDA almost 1 MMT above consensus and close to the upper end of the 121.0–124.1 MMT trade range.

Market takeaway: soybean fundamentals improved slightly as stronger exports absorbed higher production, but above-consensus global inventories limit the bullish impact of the revision.

The Bottom Line

September WASDE leaves the three markets with very different fundamental setups.

Corn remains the most supportive balance, with sharply lower global production, declining inventories and another meaningful tightening in the U.S. balance.

Wheat sits at the opposite end of the spectrum. Larger crops in several major exporting countries pushed global stocks higher, while weaker trade adds further supply pressure. The fact that inventories landed almost 3 MMT above market expectations reinforces the bearish interpretation.

Soybeans remain in between. Stronger export demand tightened both the U.S. and global balances, but the global stock figure was still higher than traders expected.

The key distinction is therefore between the direction of USDA’s revisions and the market’s expectations. Corn and soybeans tightened month on month, but neither delivered a bullish stocks surprise. Wheat both loosened fundamentally and significantly exceeded the trade consensus, making it the clearest bearish component of the September WASDE.