Corn Drops Most in Three Weeks as Profit-Taking Hits Grain Rally

Corn prices on the Chicago Board of Trade fell by as much as 1.5% on Tuesday, marking the largest intraday drop in three weeks. This decline is attributed to profit-taking after futures had rallied to a one-month high on Friday, as the market reopened following the U.S. Labor Day holiday. Despite this dip, December corn futures had seen a significant 15.9% increase in August, the largest percentage gain for that month since 1980.

Other grain and oilseed futures also saw decreases, with Chicago wheat falling by up to 2.3%, the biggest intraday drop since late July, influenced by improving global supply prospects. Soybeans, another key agricultural commodity, dropped by as much as 1.7%, as China continues to favor purchases from Brazil over the U.S.

This current market behavior comes after a strong August for corn, fueled by production concerns that became more evident throughout the month, including a USDA Crop Production report that projected an average corn yield of 180.7 bushels per acre, below market expectations. The Pro Farmer Crop Tour also indicated sub-par crop prospects, estimating the average yield at 173.2 bushels per acre. Despite the recent profit-taking, the market is in a repricing phase, adjusting to these lower production outlooks.

Export data showed corn shipments at 1.496 million metric tons (58.9 million bushels) in the week ending August 27, an increase of 13.11% from the previous week. Mexico was the largest destination, receiving 510,453 metric tons, followed by South Korea (264,474 metric tons) and Japan (173,086 metric tons). Total corn exports for the marketing year reached 83.81 million metric tons, 25.14% ahead of the same period last year.

The U.S. corn crop was rated 62% in the dough stage by August 30, with 13% mature and 47% in good to excellent condition. The Brugler500 index, a measure of crop condition, slipped one point to 347. Analysts note that while the corn market remains in a strong uptrend, it is technically overbought in the short term, suggesting a potential for further downside price corrections.