Soybean and corn futures lower on hefty grain stock projections.

Grain futures traded sharply lower across the board ahead of the highly anticipated USDA grain stocks and acreage report.

Soybean futures fell as analysts project domestic ending stocks to exceed 1 billion bushels, hitting a six-year high.

Corn futures slumped on expectations of a record crop and stockpiles reaching 5.39 billion bushels, bringing December down to 4.27'1.

Wheat futures joined the downturn, pressured by projections of a six-year high stock level at 935 million bushels, pushing the December contract beneath the 6.00 threshold.