Corn/Soybeans pair trade: short-term divergence at an inflection point
Corn/Soybeans pair trade: short-term divergence at an inflection point
The Corn/Soybeans pair trade is showing a notable short-term divergence: Corn (ZC) has surged +7.17% over the past month while Soybeans (ZS) managed just +0.12% in the same window. Yet flip to YTD and the script reverses — Soybeans lead at +13.31% vs. Corn’s +7.23%. The pair is at an inflection point.
The Ratio Snapshot
US Corn (ZC): 472.63¢/bu (−1.54% today) || 52W range: 392.5–492.0 || RSI(14d): 54.8 (neutral) || Daily signal: Strong Buy
US Soybeans (ZS): 1,186.63¢/bu (+0.31% today) || 52W range: 993.75–1,256.5 || RSI(14d): 49.6 (neutral) || Daily signal: Neutral
The Corn/Soybeans ratio sits at roughly 0.398 — meaning it takes about 40 cents of corn to match one dollar of soybeans. Corn is trading at 88% of its 52-week range (closer to the top) vs. Soybeans at 81% — Corn is pressing harder against its ceiling.
Momentum Tells Two Stories
| Timeframe | Corn (ZC) | Soybeans (ZS) | Spread |
|---|---|---|---|
| 1 Month | +7.17% | +0.12% | Corn +7.05pp |
| 3 Months | −1.69% | −2.36% | Roughly flat |
| 6 Months | +9.47% | +4.73% | Corn +4.74pp |
| YTD | +7.23% | +13.31% | Soybeans +6.08pp |
| 1 Year | +18.97% | +15.88% | Corn +3.09pp |
The one-month spread is the clearest signal here. Corn has been the momentum leader since mid-July, while Soybeans have essentially gone sideways. If you’re long Corn/short Soybeans, the last 30 days have been favorable. If you’re on the other side, it has been painful.
Technical Positioning
Corn’s weekly chart shows a Strong Buy with RSI at 56.5 and MACD bullish — the trend is intact but not overheated. Soybeans’ weekly is a Buy but with a neutral RSI of 53.9 and a bearish stochastic RSI (33.3), suggesting near-term momentum is fading.
The candlestick patterns are telling: Corn printed a Bullish Engulfing on August 3rd, while Soybeans showed an Engulfing Bearish on August 11th — a textbook divergence in formation.
Where the Pair Trade Stands
If long Corn / short Soybeans: The trade is working on the 1-month and 6-month timeframes. Corn’s stronger technicals and more aggressive push toward its 52-week high support continuation — but the YTD underperformance means the longer-horizon mean-reversion argument hasn’t fully played out yet.
If long Soybeans / short Corn: This is the value play — Soybeans are the better YTD performer but have stalled. You’d be betting on Soybeans catching up and Corn exhausting near its 52-week highs. The weekly structure doesn’t support this yet, but the YTD outperformance suggests the fundamental bid under Soybeans remains stronger.
Key levels to watch: Corn’s 52-week high at 492.0 is the resistance that matters — a break above it would accelerate the pair trade further. For Soybeans, 1,151 (weekly S2 pivot) is the line in the sand; losing it opens a move toward 1,136.