
Corn extended its rally as US yield concerns intensified, while wheat gave back most early gains after comments about a possible diplomatic track on Black Sea shipping encouraged profit-taking. USDA cut US corn conditions by 3 pp to 57% good to excellent, below expectations and the lowest for this point in the season since 2023. EU maize prospects also deteriorated, with JRC lowering its yield forecast to 6.61 t/ha, 7% below the five-year average. Russian 12.5% wheat for late September fell to $210/t FOB Novorossiysk, while August export expectations were reduced towards 1.8–2.0 mmt as southern logistics remained heavily constrained.
Corn remained the strongest grain market as traders continued to question US yield potential, while wheat balanced worsening Black Sea execution against signs of diplomatic progress. Russia was reportedly considering suspending its grain export duty through year-end, which would improve exporter margins but would not resolve southern port constraints. Argentina’s 2026/27 corn area was held at 8.4 mha, while Agroconsult forecast Brazilian corn area rising around 3% year on year to 23.3 mha. Oil prices moved lower as Iran and Oman discussed a temporary shipping corridor and mine-clearing arrangement in the Strait of Hormuz.
Wheat moved sharply higher as Black Sea risks escalated again, with CBOT reaching its daily limit while corn and soybeans also gained. Reports that Russia was preparing to intensify attacks on Ukrainian infrastructure added risk premium, while debris damaged a civilian vessel at Reni. NKHP said repairs to its damaged Novorossiysk terminal could take one to four months, while around 50–70 vessels were reportedly waiting near Sulina. EU soft wheat exports were officially reported at 2.38 mmt by August 23, although internal line-ups already indicated shipments above 4.2 mmt as replacement demand for European wheat increased. Tunisia also entered the market seeking 125k tonnes of soft wheat and 75k tonnes of feed barley.




Wheat extended its rally as buyers continued shifting towards alternative origins, while corn eased after six consecutive higher sessions. The European Commission cut EU maize production by 1.8 mmt to 50.1 mmt, the lowest in 19 years, and raised imports to 25.0 mmt. EU soft wheat ending stocks were reduced to 11.3 mmt. Russia’s alternative export routes remained considerably more expensive, with Baltic movements estimated to add around $30–50/t, while available northern and eastern routes could replace only part of lost southern capacity. Australian wheat prospects improved to 30–32 mmt following better rainfall, while Argentina completed wheat planting across 6.5 mha.
Wheat finished the week at new contract highs in Chicago, Kansas and MATIF as Black Sea disruption continued, while corn also moved higher. Russia’s Rostov region declared an emergency as port closures and navigation restrictions caused agricultural products to accumulate at farms. FranceAgriMer reduced French maize conditions to 28% good to excellent, the lowest level in records dating back to 2011. Managed money increased its corn net long by 126k contracts to 376.5k as of Tuesday, with estimates suggesting further buying later in the week. Energy prices also moved higher after the US and Iran exchanged attacks for the first time in around a month.