Corn prices experienced their steepest drop in three years after the US Department of Agriculture (USDA) unexpectedly increased its forecast for corn yield and production in the US. The agency projected output to reach about 16 billion bushels, a 1% rise from its previous estimate. This update caught many off guard, as most analysts had anticipated a reduction. Bloomberg's survey of analysts revealed an average prediction of 15.73 billion bushels, with only one out of over two dozen estimates suggesting output could hit 16 billion or more.
The sole outlier was the brokerage StoneX, which based its higher estimate on its own farmer-based survey. The USDA's revised outlook triggered a sharp decline in corn prices, marking the largest single-day plunge since 2023. The unexpected increase in production forecasts suggests a potential surplus, which typically exerts downward pressure on commodity prices.
This development highlights the volatility in agricultural markets, where government reports and analyst expectations can significantly impact pricing. The USDA's adjustment underscores the importance of accurate yield predictions, as even small deviations can lead to substantial market reactions.