Some seasons the weather decides the price. This is not one of them — at least not on its own. In 2026, what sets the value of grain in the bin has as much to do with trade agreements and import duties as with rainfall.
Soybeans are the clearest case. After China halted U.S. purchases in 2025 during tariff negotiations, the agreement reached following the presidential meeting in Busan, South Korea, restored the flow with explicit numbers: 12 million tonnes in 2025 and at least 25 million tonnes a year through 2028.
The deal is being met, but the price did not come back
By late February 2026, China had purchased or shipped 10.8 million of the 12 million tonnes committed. U.S. exports to the country from January through March rose 57% year on year. In late August the market logged four consecutive days of fresh Chinese buying of new-crop U.S. beans, totalling 641,000 tonnes.
Even so, U.S. growers have not recovered full competitiveness. American soybeans still face a 13% tariff in China, against 3% for Brazilian and Argentine product. Ten percentage points of difference in a thin-margin market is not a detail — it is the price.
The buyer diversified, and that moves South America too
On the South American side, Brazilian soybean exports grew more than 8% in the first half of 2026. The news is not in the volume but in the composition: China’s share of those shipments fell from 75% to 69%, even as it took 48.3 million tonnes.
The correct reading is not that China is buying less from Brazil. It is that Brazil is selling more to everyone else. That reduces concentration risk while forcing exporters to handle different quality, residue and traceability requirements in each destination.
Wheat: two shocks pulling in opposite directions
Wheat is the grain where geopolitics is most visible. On one side, recurring Black Sea export disruptions and slowing Ukrainian shipments support the price. On the other, India lifted the export ban it had held for years, putting a significant supplier back into the market and capping the upside.
It is an unstable balance, the kind that breaks on a single headline. For wheat buyers — millers and the feed sector — that means locking volume during periods of calm is worth more than trying to call the bottom.
Corn and canola: supply and logistics in charge
In corn, contracts set new highs in late August on technical buying and fund positioning after Pro Farmer projected U.S. production well below official estimates. In Europe, the MARS service cut expected yield by 5% to 6.61 t/ha, roughly 7% under the five-year average.
Canola shows the opposite picture. Canada raised its 2026/27 crop forecast by 600,000 tonnes to 21.6 million, while weekly exports fell nearly 50% to 116,000 tonnes. Bigger supply with slower movement is the classic recipe for domestic price pressure.
What a grower does with this information
Watch the spread, not the headline. The difference between U.S. and South American port prices, adjusted for tariff and freight, says more about your odds of selling well than any official statement. When the spread narrows, the origin premium evaporates regardless of the news cycle.
Treat currency as part of the price. In an exporting country, a currency move can wipe out a rally in Chicago entirely. Selling in dollars without a currency policy means taking two risks and managing one.
Scale the sales. It applies to grain exactly as it applies to inputs. In a year of frequent geopolitical headlines, the average price beats the single call most of the time.
Diversify buyers. Working with more than one trader — Cargill, Bunge, ADM, Louis Dreyfus and Amaggi operate with different structures and appetites — improves the bid and reduces counterparty risk.
Follow the right sources. The Grains: World Markets and Trade report from USDA/FAS lays out the world balance sheet. Conab surveys adjust Brazilian supply. And exchange positioning at CME Group and B3 shows where the money is betting.
The chokepoints nobody puts in the spreadsheet
There is a layer of risk that rarely appears in market analysis and that has decided prices more than once in recent years: logistical chokepoints. A draft-restricted Panama Canal, the Strait of Hormuz under military tension, an unstable Black Sea shipping corridor, Red Sea rerouting — each of those episodes adds sailing days and insurance premium to the cargo.
The effect rarely shows up as a commodity headline. It arrives disguised as higher freight, which compresses the basis paid to the grower without moving the exchange quote at all. It is the quietest way to lose money in a market that, on paper, was rallying.
That is why ocean freight indices deserve the same attention given to the supply and demand report. When transport costs rise persistently, exporters adjust port premiums downward, and the growers who feel it first are the ones farthest from the terminal.
When policy becomes a fundamental
For a long time the market treated tariffs and sanctions as temporary noise layered over stable agricultural fundamentals. That separation no longer holds. A 13% duty that persists across consecutive seasons is not noise — it is a structural cost that redirects trade flows and redraws origins of supply.
The practical consequence is that market analysis has stopped being only weather and stocks. It now includes election calendars, bilateral agreement deadlines and port capacity in conflict zones. It is more work. It is also what separates those who sell at the right moment from those who sell when they need the cash.
Learn more about markets, exports and grain marketing at www.farmfor.com.br.
