Soybean and Corn Rallies Are Diverging as the Next WASDE Approaches

Soybean good-to-excellent condition ratings fell two points in the latest weekly update while corn ratings held steady, and the futures market repriced both immediately. Soybean and corn futures are diverging because the yield dispute driving the grain complex is a corn story, not a shared one, and soybeans are rallying on a separate and choppier set of inputs. The 7.5 bushel gap between the U.S. Department of Agriculture August corn yield and the Pro Farmer Crop Tour figure applies to corn alone. Soybeans have picked up strength alongside it without the same straight-line move, and the two markets now carry different risk into the September WASDE report.

Lane Dungan is a Market Strategist at RJO Futures and a licensed futures broker who produces agricultural market commentary across corn, soybeans and wheat. He follows grain spread relationships, U.S. Department of Agriculture reports and global export flows across the grain and oilseed complex.

Key Themes from the Discussion

• Soybean good-to-excellent ratings fell two points in the latest week while corn ratings held flat.
• The 7.5 bushel yield dispute sits in corn, giving the corn rally a cleaner driver than soybeans.
• Futures repriced the same day the condition data landed, confirming traders watch the weekly ratings closely.

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Soybean Condition Ratings Slipped While Corn Ratings Held Flat

Soybean good-to-excellent ratings dropped two points in the latest weekly reading and corn ratings were unchanged, splitting the two crops on the one data set that updates every week. That single divergence matters more than its size suggests, because condition ratings are the running yield proxy between the U.S. Department of Agriculture's monthly surveys. "we've seen good to excellent ratings stay the same or decrease this week", Dungan says of the latest reading, and the futures response arrived the same session. Consequently, a soybean position and a corn position are no longer reacting to the same weekly input, even inside a rallying grain complex. For commercial buyers, that means soybean deterioration and corn stability now need to be tracked as separate supply questions rather than a single crop-health headline.

Soybean Futures Are Rallying Without the Straight Line Corn Has Built

"The rally is not as linear as the corn market, but we are seeing substantial strength". Dungan's description of the soybean move captures the structural difference between the two markets since the Pro Farmer Crop Tour, where corn has had one dominant catalyst and soybeans have not. The 7.5 bushel gap between the U.S. Department of Agriculture and Pro Farmer corn yield estimates gives corn a clean, quantified reason to rally, and soybeans have no equivalent headline dispute to trade. Soybean strength has instead come from deteriorating conditions and the broader grain complex bid, which produces a choppier chart and a less predictable path. As a result, the soybean market carries a different kind of exposure into the September WASDE, where a corn yield revision would hit corn directly and reach soybeans only through sentiment and the spread.

--- Written by Frédéric Guétin, StoneX Media Producer

--- Expert: Lane Dungan, RJO Futures Market Strategist