Soybeans carried the largest aggregate cash bid total in the USDA AgTransport grain price dataset for week 37 of 2026, reported as of September 18, at 176.96, well ahead of corn at 69.36. Hard Red Winter Wheat registered 52.57, Hard Red Spring Wheat 38.58, Soft Red Winter Wheat 14.87, Soft White Winter Wheat 7.4 and Durum Wheat 6.13. The latest data slice covers 44 rows organized by market, market type, commodity and source.

The single highest bid in the dataset came from the Gulf - Louisiana soybean market under the 30-Day to Arrive category at 13.91, sourced from USDA AMS Market News Report JO_GR850 and U.S. Wheat Associates Price Reports. That Gulf premium sets the reference point for interior basis this week.

North Carolina elevators posted a soybean bid of 12.99, the strongest interior figure in the dataset. Indiana followed at 12.79, matching the Atlantic Coast 30-Day to Arrive market, with Great Lakes - Toledo at 12.77 under the same category.

The interior soybean ladder ran from Illinois at 12.7 down through Ohio at 12.57, Iowa at 12.53, Nebraska at 12.47, South Dakota at 12.4, North Dakota at 12.39, the Southeast at 12.39, Minnesota at 12.19 and Kansas at 12.07. GeoGrain Subscription supplied the North Carolina, Indiana, Illinois, Ohio, Iowa, Nebraska, North Dakota, Southeast, Minnesota and Kansas figures; USDA AMS Market News Report SF_GR110 provided the South Dakota bid.

That spread matters for margins. A grower delivering soybeans in Illinois captured roughly $1.21 per bushel more than a Kansas counterpart on the reported bids, a differential that flows directly into hauling and storage decisions as harvest advances.

Wheat bids split by class and export position

Hard Red Spring Wheat showed the widest geographic range. Gulf - Louisiana posted a 30-Day to Arrive bid of 9.51, sourced from USDA AMS Report JO_GR850 and U.S. Wheat Associates Price Reports, while Portland recorded 9.11 on inputs from USDA AMS Report JO_GR110 and U.S. Wheat Associates. Elevator bids trailed export positions: Washington at 6.93, North Dakota at 6.62 and Montana at 6.41, all attributed to GeoGrain Subscription.

In Hard Red Winter Wheat, Gulf - Texas led at 9.44 under 30-Day to Arrive, sourced from U.S. Wheat Associates Price Reports, with Portland at 8.69 from USDA AMS Report JO_GR110 and U.S. Wheat Associates. Interior HRW elevator bids ran from Washington at 7.29 and Oklahoma at 7.24 to Kansas at 7.14, South Dakota at 6.64 and Montana at 6.13. USDA AMS Report SF_GR110 supplied the South Dakota figure; GeoGrain Subscription supplied the rest.

Soft Red Winter Wheat posted 8.14 for Gulf - Louisiana and 6.73 for the Atlantic Coast under 30-Day to Arrive, both from USDA AMS Report JO_GR850. Soft White Winter Wheat registered 7.4 at Portland under the same category, and Durum Wheat showed a single elevator bid of 6.13 in North Dakota via GeoGrain Subscription.

Corn: Gulf bid clears $6, interior compresses

Corn followed the same export-led pattern. Gulf - Louisiana posted the top bid at 6.06 under 30-Day to Arrive, from USDA AMS Report JO_GR850 and U.S. Wheat Associates. North Carolina elevators recorded 5.6, the Atlantic Coast 5.38 under 30-Day to Arrive, Indiana 5.08, Illinois 4.94, and Kansas, Great Lakes - Toledo and Ohio each 4.91. Iowa came in at 4.81 and Nebraska at 4.8.

The lower tier included South Dakota at 4.57 from USDA AMS Report SF_GR110, North Dakota and the Southeast at 4.51 each, and Minnesota at 4.37 — leaving a $1.69-per-bushel gap between the Gulf bid and the weakest interior market. GeoGrain Subscription attributed the North Carolina, Indiana, Illinois, Kansas, Ohio, Iowa, Nebraska, North Dakota, Southeast and Minnesota corn bids; USDA AMS Report JO_GR850 supplied the Great Lakes - Toledo and Atlantic Coast figures.

These are reported cash bids for a single week, not harvested results or forecasts, and the aggregate totals reflect the number of reported rows per commodity rather than volume-weighted averages. Growers and merchandisers tracking basis into October will find the next AgTransport data release the reference for whether Gulf premiums hold as movement accelerates.