Grains await USDA reality check after fund-driven round trip

Hedge funds have completed a remarkable round trip

One of the defining features of this year's grain market has been the extraordinary swing in speculative positioning. As weather uncertainty, geopolitical disruptions and higher crude oil prices combined to lift agricultural prices during the spring, managed money accumulated the largest combined long position in CBOT corn, soybeans and wheat since 2022. At the peak, hedge funds held a net long of approximately 556,000 futures contracts, equivalent to roughly 2.8 billion bushels.

That optimism has since evaporated driven by improved crop conditions, a sharp retreat in energy prices following the reopening of the Strait of Hormuz, stronger expectations for ample U.S. supplies and continued pressure from Black Sea exports have triggered aggressive liquidation. The combined position has now flipped back to a modest net short.

While this reversal reflects a much more cautious outlook, it also reduces the risk of another wave of forced selling. Should today's USDA reports prove even modestly less bearish than expected, the market may instead become vulnerable to short covering after much of the speculative length has already been removed.

Bigger stockpiles help cushion weather risk

Corn will once again be the centre of attention with trade estimates pointing to a corn stockpile of around 5.4 billion bushels, approximately 17% above last year and potentially the highest level for the date since 1988. At the same time, planted acreage is expected to remain close to the March intentions survey, reinforcing expectations for another substantial harvest if summer weather remains broadly cooperative.

Such inventories provide an important cushion against weather-related disruptions, especially as forecasts continue to indicate periods of heat across portions of the Midwest, while NOAA continues to warn that El Niño may develop into one of the strongest events in decades later this year. However, higher beginning inventories mean the market does not need to assign the same weather premium as it might have under tighter supply conditions. Instead, weather risks are increasingly being weighed against what currently appears to be a comfortable inventory buffer.

Soybeans present a more balanced picture. Larger acreage and adequate supplies remain a headwind, but demand continues to receive structural support from the renewable fuels sector, particularly soybean oil.

Biofuel support has faded alongside crude oil

The spring rally in grains was never solely about weather but equally about the second-round impact of higher crude oil prices during the Strait of Hormuz disruption which improved the relative economics of crop-based biofuels, helping support soybean oil and, indirectly, the broader oilseed complex. Since then, crude prices have fallen sharply as Gulf exports resumed, removing an important macro tailwind for agricultural markets.

Even so, the longer-term demand outlook remains constructive for soybean oil. Higher U.S. renewable fuel mandates and continued expansion of renewable diesel capacity should keep biofuel demand growing, helping explain why soybean oil has significantly outperformed soybean meal this year.

Wheat, meanwhile, remains the weakest part of the grain complex. Rapid harvest progress in the United States, together with expectations for another sizeable Black Sea crop, continues to outweigh concerns about relatively poor U.S. winter wheat conditions.

Ample supplies and deep contango raise the bar for grain bulls

Another indication of the market's increasingly comfortable supply outlook can be seen in the shape of the futures curve. Corn and wheat are both trading in a pronounced contango, where deferred contracts command a premium over nearby deliveries. As the performance table shows, the one-year calendar spread has widened to around 14.7% in corn and 10.4% in CBOT wheat, reflecting expectations that ample inventories and another sizeable harvest will leave supplies readily available well into next year.

For investors, the shape of the curve matters almost as much as the outright price direction. A market in contango generally favours investors holding short futures positions. As nearby contracts approach expiry, they tend to converge lower relative to the more expensive deferred contracts, allowing short sellers to benefit from the positive roll yield when positions are rolled forward.

Long-only investors face the opposite challenge. Maintaining exposure requires repeatedly selling cheaper expiring contracts and buying more expensive deferred contracts, creating a negative roll yield that gradually erodes returns even if the outright futures price remains broadly unchanged.

With inventories expected to remain comfortable and the market continuing to price abundant supplies beyond harvest, this carry structure has become an additional headwind for investors attempting to maintain long exposure across the grain complex.

Bottom line

The past two months have seen grain markets move from pricing weather uncertainty and geopolitical risk towards pricing comfortable supplies and improving crop prospects. That transition has been accelerated by one of the sharpest reversals in speculative positioning seen in recent years.

Today's USDA reports are therefore likely to do more than update acreage and inventories. They will test whether the market has already priced the improving supply outlook or whether another adjustment lower is required. With hedge funds now positioned net short rather than heavily long, the balance of risk may increasingly depend on whether the data merely confirms expectations—or delivers a genuine surprise.