Traders double the odds of South Dakota corn topping 155 bushels

A 16-point jump in a day still leaves the likeliest yield between 150 and 155 bushels an acre.

In one line: South Dakota's 2026 corn yield, in the final federal count due by 31 January 2027, does not exceed 155 bushels an acre; 30% overrates the upside.

Traders doubled the odds this week that South Dakota's 2026 corn yield, as the Agriculture Department's National Agricultural Statistics Service (NASS) reports it, beats 155 bushels per harvested acre. The Kalshi contract stood at 14% on 3 Oct and 28% on 10 Oct, a gain of 14 points over the 7 days. The venue now shows 30%, up 16 points in the last 24 hours by its own count, so the whole move came in a single day.

The rest of the ladder frames that price. The contract for a yield above 150 bushels trades at 66% and the one above 160 at 14%. The rungs from 165 to 180 sit between 6% and 11%. Read together, they make 150 to 155 bushels the likeliest band, with almost as much weight below 150. At the top, the 180 contract, at 7%, sits marginally above the 175 contract at 6%, a gap small enough to reflect thin trading rather than a firm view.

Even at 30%, traders still expect a yield at or under 155 bushels. A 16-point jump in one day is slim support for a forecast of a figure due before the contract resolves on 31 January 2027, and the gap at the top rungs suggests a book that trades little.

The call: South Dakota's 2026 yield, as NASS reports it, does not top 155 bushels an acre, and the 30% price overrates that upside after a one-day jump. The best case against it is that the jump reflects a harvest running better than the 14% that opened the week allowed. That case wins if a NASS estimate puts the state above 155 before the final figure, or if the contract holds above 50% after the next NASS monthly crop report. The final NASS figure, due by 31 January 2027, settles it.