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Corn futures slip to one-week low as traders bank profits before US harvest

Corn futures slip to one-week low as traders bank profits before US harvest
Markets · 2026
Photo · Eleanor Whitfield for Daily Digest Invest
By Eleanor Whitfield Markets Editor-in-Chief Sep 18, 2026 3 min read

Corn futures in Chicago slipped to a one-week low this week as traders locked in profits ahead of the US harvest. The December contract ended the week around $5.27-1/2 a bushel, after briefly dipping to $5.25-1/2, as a combination of easing Midwest rain forecasts and weaker crude oil prices weighed on the market.

What's behind the move?

The pullback comes after a period of strength, with many market participants choosing to cash in gains before the harvest gets fully underway. Profit-taking is a common feature in commodity markets, especially when prices have rallied and traders want to secure returns ahead of a potentially volatile period.

One key factor supporting the decline was the shift in weather forecasts. Earlier concerns about heavy rains in the US Midwest had raised fears that wet fields would slow the harvest and potentially damage crop quality. However, updated forecasts now point to drier conditions, easing those worries and reducing the risk of supply disruptions.

Another weight on prices came from the energy complex. Corn is a primary input for ethanol, and weaker crude oil prices can reduce the incentive for blending more biofuel. When energy prices fall, the economics of ethanol production can become less attractive, which in turn can dampen demand for corn.

What investors are watching next

Traders are also keeping an eye on the upcoming meeting between US President Donald Trump and China's Xi Jinping. Agricultural purchases, including corn and soybeans, could be on the agenda, and any signs of progress in trade talks could provide support to the market. Conversely, a lack of movement could keep prices under pressure.

Meanwhile, the latest positioning data from the Commodity Futures Trading Commission (CFTC) is being closely monitored. The data shows how speculative traders are positioned in the market, which can offer clues about future price direction. A large build-up in net long positions, for example, could signal that the market is overbought and due for a correction.

What it means for your money

For everyday investors, moves in corn futures may seem distant, but they can have ripple effects. Corn is a staple ingredient in food products, animal feed, and fuel, so changes in its price can influence grocery bills and energy costs over time. A drop in corn prices, if sustained, could eventually translate into lower costs for food producers and, potentially, consumers.

However, it's important to remember that commodity markets are volatile and subject to rapid shifts. Weather, trade policy, and energy prices can all move corn in either direction. For most investors, the direct impact of a single week's move in corn is limited, but it's worth watching as part of the broader picture of agricultural and energy markets.

As the harvest season progresses and trade talks unfold, expect more volatility in corn prices. For now, the market is taking a breather, with traders locking in profits and waiting for the next catalyst.

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