A blockbuster Algerian purchase and a worsening Black Sea supply crunch lift wheat, while favorable Midwest rain keeps corn and soybeans under pressure.

Wheat is the lone gainer at midweek, supported by a massive Algerian tender and mounting Black Sea export disruptions, while corn and soybeans are sliding for a second session on friendly rain chances across the central and eastern Midwest. Traders are also digesting fresh StoneX yield estimates and a private corn export sale ahead of next week's USDA report.

Algeria Buys Big in a Blockbuster Wheat Tender

Algeria purchased an estimated 300,000 to 720,000 MT of wheat in Wednesday's tender, one of the largest single purchases the market has seen recently. The scale of the buy is a clear demand signal for global wheat and is helping drive gains across the Chicago, KC, and Minneapolis contracts today. The purchase is supportive for wheat broadly, with US and competing origins likely to compete for a share of the business.

Black Sea Bottleneck Deepens as Storage Fills and Exports Sink

Ukraine's Grain Lobby warned that increasing wheat supplies at Black Sea ports may exhaust storage capacity by early November, with no vessels having entered Odessa in the last two weeks amid ongoing Russia/Ukraine attacks on vessels and port infrastructure. The resulting glut is pushing domestic prices sharply lower inside Ukraine and Russia even as freight and insurance costs climb, and IKAR estimates Russia's July wheat exports were down 17% to 24% year-over-year with August exports anticipated down 32% to 43%. Ukraine says alternative export routes can only cover half of the restricted volume and will not reach full capacity until at least the end of August, a bearish backdrop for regional supply flow even as it keeps global buyers looking elsewhere.

UK Wheat Crop Set for Its Worst Harvest Since 1984

The same heatwave that has hit the EU has also damaged the UK crop, with harvest now just past halfway complete and yield estimates at their lowest since records began in 1984. A historically poor UK harvest adds another supportive data point for global wheat values, reinforcing the tightening picture outside of the Black Sea region.

Corn Export Pace Points to an Upward WASDE Revision

USDA reported a private export sale of 120,000 MT of corn to Mexico this morning, split between 30,000 MT for 2026/27 and 90,000 MT for 2027/28. June US corn exports were a record for the month, a pace that strongly suggests USDA will need to raise its old-crop export estimate by at least 50 million bushels in next week's supply and demand report, which would pull ending stocks lower if yields are left unchanged. The export strength is a supportive undercurrent for corn even as prices trade lower today.

Midwest Rain in the Forecast Pressures Corn and Soybeans

The NOAA 7-day QPF shows rain across much of Iowa, Missouri, Illinois, Indiana, Wisconsin, Michigan, and Ohio, with totals of 1 to 4 inches in some areas. For corn, pollination is mostly complete, so crop stress in the western Belt has not been acute enough to offset strong conditions across the central and eastern growing regions, and the 6-to-14-day outlook keeps above-normal precipitation over the Great Lakes and eastern Belt. For soybeans, rain chances over Missouri, Iowa, Illinois, southern Wisconsin, and northern Indiana, prime production areas, have pushed the November contract to a fresh one-month low, with the contract lower in five of the last seven sessions. The favorable moisture is bearish for both crops as it supports yield potential heading into the back half of the season.

Yield Estimates Firm Up Ahead of Next Week's Report

StoneX estimated the US corn yield at 184.8 bushels per acre on Tuesday following its customer survey, implying total production of 16.16 billion bushels. On the soybean side, StoneX put its initial 2026 yield estimate at 53 bushels per acre for production of 4.47 billion bushels, a number matched by a separate clearing firm estimate that landed right on USDA's own figure. The convergence of large private yield estimates ahead of next week's USDA report is a bearish undercurrent for both corn and soybeans.

China Clears Reserve Stocks to Make Room for US Beans

China's Sinograin held another auction of imported soybeans, selling 334,000 MT of the 501,000 MT offered at an average price of $594.84 per MT, continuing a pattern of clearing reserve stock to make space for incoming US arrivals. The move signals China is preparing for further US soybean receipts even as it works through existing inventory, a modestly supportive longer-term demand signal for the soy complex.

Ethanol Output Slips as Argentina Strike Resolves

Weekly EIA data showed US ethanol production at 1.107 million barrels per day in the week of July 31, down 26,000 bpd from the prior week, with stocks drawing 202,000 barrels to 24.524 million barrels. Ethanol exports rose to 200,000 bpd, up 63,000 bpd on the week, while refiner stocks slipped 3,000 bpd to 936,000 bpd, a mixed but broadly neutral report for corn demand. Separately, Argentina's maritime guide pilots ended a one-day strike overnight after reaching a deal, with workers back on the job Wednesday, removing a brief risk to South American vessel traffic.

Crop Futures Wrap

WHEAT

Sep '26 CBOT wheat is at $6.46 1/2, up 8 cents, with Chicago SRW broadly 8 cents higher, KC HRW up 12 cents in the front months, and MPLS spring wheat up 4 to 5 cents at midday. Support is coming from Algeria's outsized purchase and a deteriorating UK crop outlook, while a growing Black Sea storage backlog and sharply lower Russian export estimates are the main offsetting factors.

CORN

Sep '26 corn is at $4.37 1/4, down 5 cents, with the broader complex down 5 to 6 cents at midday. Favorable Midwest rain chances just as pollination wraps up are the dominant early pressure, even as a private 120,000 MT export sale to Mexico and a record June export pace point toward a likely upward revision in next week's USDA report.

SOYBEANS

Aug '26 soybeans are at $11.49 3/4, down 5 1/4 cents, with contracts broadly down 3 to 5 1/4 cents at midday and the November contract touching a fresh one-month low. Rain across prime Midwest production areas is the dominant bearish driver, while continued Chinese reserve auctions clearing space for US arrivals offer a longer-term demand counterweight.