Wednesday's gains spilled into the overnight trade, and it's got corn, soybean and wheat prices poised for another morning of stronger opening prices.

Early calls for the grains are corn 7-10 cents higher, soybeans 15-18 higher and wheat 7-10 higher, according to private sources.

Word of potential fresh export demand for U.S. corn hit the CME Group trading floor on Wednesday, sending the grains to a higher close after 2 days of lower prices. That strength continued in the overnight trading session. As of 6:22 AM CST, the December corn futures contract was 7 1/4 higher at $7.63 per bushel, while December wheat was 8 1/4 higher at $8.72 3/4. January soybeans traded 20 1/2 cents higher to $15.69 1/4 per bushel.

Some traders have said for quite some time that though there's a clear shortage of grain in the pipeline after this year's drought, the trade had yet to factor that in to prices. After the last 2 days' trade, however, some farmers are starting to wonder whether that -- as well as the grain trade's coupling with the equities markets -- is changing.

"We could see things decouple," says Agriculture.com Marketing Talk senior contributor Mizzou_Tiger. "Grains are finally starting to get their mojo back...maybe some are waking to the fact supply isn't out there and demand hasn't been as silent as first thought."

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