A week defined by volatile reversals — Iran closed and reopened the Strait of Hormuz, the Drought Monitor climbed to its worst seasonal reading since 2022, and the IGC simultaneously confirmed record global output — leaving grains caught between bullish weather and bearish supply fundamentals at every turn.

The week of April 21–25 was the most volatile of the month for grain markets and arguably the most complex of the year. The Strait of Hormuz opened Friday April 18, briefly removing the fertilizer and energy premium; closed again within 24 hours to re-ignite it; produced a sharp Thursday wheat rally as the Drought Monitor confirmed 70% of US winter wheat in drought; and closed Friday on a structurally bearish IGC stockpile report projecting a record 2.474 billion ton global grain season. Managed money's sharp net long liquidation in corn, persistent HRW deterioration, a record South American harvest overhang, and China's decade-long import reduction outlook all competed for dominance. The week ended with wheat as the standout performer, corn modestly higher, and soybeans as the laggard — a split reflecting the fundamentally divergent supply-and-demand drivers at work beneath the surface.

Hormuz Re-Closure Reversed Friday's Fertilizer Relief — and Kept Input Costs Elevated All Week

The most disruptive single development of the week was Iran's decision to close the Strait of Hormuz less than 24 hours after the reported reopening on Friday April 18. Fertiglobe's CEO warned that Gulf urea exports slumped to approximately 300,000 tons in March from typical monthly volumes of 1.7 million tons, and that prices — already near $1,000 per ton against pre-war levels of $490 — could move still higher. As many as 44 ships laden with fertilizer remained stranded in the Persian Gulf as of Tuesday, with US buyers actively redirecting imported urea barges from the Port of New Orleans for overseas export to capture the elevated global price differential. The US Treasury Secretary was reported urging G20 members and the IMF and World Bank to coordinate fertilizer access measures, citing IMF warnings that supply chain disruptions threatened to push 45 million more people into food insecurity. Russia simultaneously extended its fertilizer export quotas through November 30 — capping nitrogen exports at over 8.7 million tons and compound fertilizer at over 7 million tons — removing a potential relief valve for global markets. The structural implication across all three crops is that production cost inflation is now embedded for the 2026 planting season in ways that will influence area and yield decisions globally, with France's 15% corn area cut and Argentina's 3% wheat area reduction the most tangible examples confirmed this week.

US Winter Wheat Drought Deteriorated to Its Worst Seasonal Reading Since 2022

The week's most decisive crop-specific development was the ongoing collapse of US winter wheat condition ratings. Tuesday's USDA Crop Progress report dropped the good/excellent rating a further 4 percentage points to 30% — 15 percentage points below last year's 45% — with the Brugler500 index falling 5 points to 290. Thursday's Drought Monitor update confirmed 70% of the US winter wheat crop in drought, the largest drought-impacted share since 2023 and the worst for this point in the growing season since 2022. The crop is simultaneously heading at an accelerated pace: 20% headed as of April 21, fully 8 percentage points ahead of normal. Advanced heading under severe moisture stress means the crop is passing through critical yield-determination stages with minimal soil water reserves. The NOAA 7-day QPF offered partial relief — up to 1 inch possible for western Kansas — but the Texas and Oklahoma panhandles are projected to remain essentially dry. A Thursday cold front introduced additional frost risk for advanced stands. KC HRW captured this story most clearly, leading the complex higher throughout the week and delivering Thursday's 10.5 to 29.25 cent session gain.

China's Decade Outlook and March Import Lag Added a Structural Bearish Overlay to Soybeans

China's agriculture ministry-backed Agricultural Outlook 2026–2035 report, released Monday, projected soybean imports declining 6.1% in 2026 year-on-year and falling to 82.55 MMT by 2035 from a record 111.83 MMT in 2025 — a 26.2% structural reduction over the decade. Grain imports broadly are projected to fall to 115 MMT from 140.56 MMT in 2025. Near-term data corroborated the caution: China's March soybean imports from the US recovered from near-zero in the October–December period following the late-October trade truce, but volumes remained sharply below year-earlier levels. China remained the dominant US soybean export destination in the weekly Inspections data — 446,146 MT of the 748,678 MT total for the week of April 16 — confirming that near-term flows are intact but structurally constrained. Louis Dreyfus's chief risk officer and Clarkson's dry cargo director both cited this structural shift at the FT Commodities Global Summit during the week, with COFCO's $400 million Brazil crushing expansion in Rondonópolis — designed to double processing capacity — underscoring how Chinese investment is actively building the infrastructure to reduce US origin dependency.

IGC Confirmed Record Global Grain Output and the Sharpest Stock Build Since 2017

Thursday's IGC report was the week's most comprehensively bearish macro data release. Total 2025/26 grain production is projected at an all-time high of 2.474 billion tons — up 6% — with global inventories rising 9% at season end, the sharpest single-year expansion in nine years. World wheat ending stocks were revised up 8 MMT to 284 MMT despite a 1 MMT production trim, as projected use fell 4 MMT. The 2026/27 global corn crop was cut 3 MMT with ending stocks at 292 MMT, down 2 MMT, while soybean ending stocks for 2026/27 were projected at 79 MMT — down 4 MMT — with use up 2 MMT. The soybean supply tightening at the 2026/27 level provides a structural counterweight to the current-season supply overhang. The IGC also specifically flagged fertilizer affordability concerns as a key uncertainty in the forward production outlook — acknowledging that the input cost shock is large enough to alter planted area and yield projections meaningfully if the Iran conflict persists.

Brazil Safrinha Corn at Pollination Under Worsening Dryness — Supply Risk Growing

Perhaps the most under-appreciated developing story of the week was the Brazilian safrinha corn crop entering its critical pollination window with the wet season ending approximately two weeks early across central Brazil. The NOAA-aligned forecast confirmed that much of the safrinha corn acreage will remain dry for the next two weeks, with relief confined to the far south via stalling frontal systems. When not raining, temperatures are described as very high, creating compounding heat stress. Lower-than-normal soil moisture reserves built up during the wet season will deplete rapidly. AgRural confirmed the soybean harvest at 92% complete as of Thursday and announced it would be its final weekly soybean report of the season — meaning the market's Brazil weather focus is now fully shifting to corn. If pollination-period dryness damages the safrinha yield, the CONAB estimate of 139.57 MMT faces downside pressure, and the Brazilian supply cushion that has kept global corn prices depressed narrows materially heading into the May WASDE.

US Export Sales Delivered Mixed Signals; Corn Demand Remained the Standout

Thursday's USDA Export Sales report for the week of April 16 provided the week's clearest look at actual demand. Old-crop corn sales of 1.316 MMT — a 3-week low but 14.2% above the same week last year — were underpinned by 2026/27 new-crop sales of 440,110 MT to Mexico, the second-largest new-crop total of the marketing year. Tuesday's USDA flash sales announcements added 731,600 MT of corn across Mexico, Colombia, and unknown buyers, with multi-year coverage spanning 2025/26 through 2027/28. South Korean importers completed private purchases totalling 201,000 MT across Thursday and overnight into Friday. Marketing year corn inspections of 51.71 MMT now stand 31.79% above year-ago pace — the structural export demand story remains the cleanest positive in the complex. In contrast, old-crop soybean sales of 364,633 MT were a 4-week high and 72.64% above year-ago, but 2025/26 new-crop sales were a minimal 5,000 MT, all to Malaysia. Old-crop wheat sales came in at 129,022 MT — above the prior week but at the lower end of expectations, with Japan and Nigeria as the primary buyers.

Southeast Asian Biofuel Mandates Accelerated; Vegetable Oil Demand Structurally Tightening

Indonesia's confirmation that B50 biodiesel implementation remains on track for July 1 — with 3.9 million kiloliters already consumed against the 15.65 million kiloliter B40 annual allocation — was reinforced throughout the week by Malaysia's review of its biofuel policy targeting a B20 transition, Thailand's move to B7, and Brazil's Abiove confirming an accelerated testing timeline targeting B20 and B25 blend mandates by February 2027. The Malaysian Palm Oil Council projected palm oil prices remaining supported near 4,500 ringgit per ton on biodiesel economics and El Niño risk, with the combined B50/B15/B7 mandates requiring approximately 3.65 million additional tons of palm oil per year. These developments are structurally supportive for soy oil via cross-commodity substitution: as palm oil volumes are absorbed domestically for biofuel blending, soy oil's competitive position in global import markets strengthens. The soy oil-corn oil-palm oil substitution triangle continued to frame the week's intraday soy oil volatility, with the Hormuz re-closure providing the energy bid that kept soy oil's biofuel premium alive through Thursday's close.

El Niño Emerging as a Growing Forward Risk for Asian and Australian Supply

Japan's weather bureau placed a 70% probability on El Niño emerging during the northern hemisphere summer — consistent with China's expectation that the event could persist through year-end and India's forecast of below-average monsoon rainfall for the first time in three years. The last comparable signal was the severe 2015/2016 El Niño that triggered widespread Asian drought. Australia and Southeast Asia are the most susceptible early-impact regions: Australian farmers are already cutting wheat and canola planting in response to current dryness. The phenomenon also brings heavier-than-normal rains to North and South America in the second half of the year — which could benefit US and Argentine growing conditions but also risk disrupting the US autumn harvest. The FAO and WMO released a joint report during the week warning that extreme heat is pushing global agrifood systems to the brink, with heatwaves becoming more frequent, intense, and prolonged. El Niño's forward risk cannot yet be priced with precision, but it is increasingly cited as the most material medium-term bullish tail across all three crops.

Wheat

May '26 CBOT wheat opened the week at $5.97 on Monday and closed Friday at $6.10 3/4 — a net weekly gain of approximately 13 3/4 cents on the front month, making wheat the week's strongest performing crop. The week's arc ran from Monday's orderly strength on HRW dryness, to Tuesday's resistance after India approved an additional 2.5 million tons of wheat exports and SovEcon raised its Russian crop estimate 2.4% to 89.7 MMT, through Wednesday's modest softening as Rusagrotrans lifted April Russian exports to 3.8 MMT — 59% above year-ago pace — and then to Thursday's decisive 10.5 to 29.25 cent KC HRW-led rally as the Drought Monitor confirmed 70% of US winter wheat in drought. Saudi Arabia's 710,000 MT tender with a Friday deadline and Taiwan's 105,950 MT US wheat purchase added demand-side support. The EU Commission projecting a 6.2% drop in EU wheat output for 2026/27 from last year's exceptional levels provided an additional medium-term constructive note.

Corn

May '26 CBOT corn closed at $4.52 on Monday and $4.55 1/2 on Thursday, with Friday's close bringing the week's net gain to approximately 3 cents on the front month — a modest but steady performance against a backdrop of competing supply and demand signals. The week's primary bullish drivers were the Tuesday flash sales totalling 731,600 MT, the consecutive South Korean private purchases of 134,000 and 67,000 MT on Thursday and overnight Friday, and marketing year inspections running 31.79% above year-ago pace. The bearish offsets were the USDA attaché confirmation of Argentina's record 61 MMT corn harvest with 41 MMT of exports, the IGC's 3 MMT global corn production cut that still left 2026/27 ending stocks at 292 MMT, and Brazil's safrinha entering pollination under worsening dryness — an emerging risk that, if confirmed, represents the week's most significant developing bullish corn variable into the May WASDE. Wednesday's ethanol production at 1.04 million barrels per day — 80,000 below the prior week — was a modest bearish near-term ethanol signal, though the E15 year-round legislation filing on Wednesday offered a medium-term structural demand narrative.

Soybeans

May '26 CBOT soybeans closed at $11.65 3/4 on Monday and $11.59 3/4 on Thursday, leaving the front-month approximately 6 cents lower on the week and making soybeans the complex's laggard. The week's bearish pressures were substantial and consistent: China's decade outlook projecting a 26.2% structural decline in imports to 2035, COFCO's $400 million Brazil crushing investment signalling continued US origin displacement, Brazil's harvest at 92% complete with Safras & Mercado at 178.11 MMT, and 2025/26 new-crop soybean export sales of just 5,000 MT — essentially zero forward demand from the US. Open interest shed 18,694 contracts on Thursday alone as longs exited. Thursday's 4-week high old-crop sales of 364,633 MT and the 72.64% year-on-year gain offered brief support, but were overwhelmed by the structural narrative. The IGC's 4 MMT cut in 2026/27 soybean ending stocks to 79 MMT and rising Southeast Asian biofuel mandates — structurally tightening vegetable oil supply — remain the most credible medium-term support mechanisms, though Friday's fractional recovery to up 1 cent confirmed that neither catalyst was sufficient to reverse the week's established downtrend.