Chicago Board of Trade soybean futures slumped on Monday as traders adjusted positions ahead of the U.S. Department of Agriculture's acreage and stocks reports, market analysts said.
The most-active CBOT November soybean (SX26) contract fell 17-1/4 cents to end at $11.39 a bushel.
CBOT August soymeal (SMQ26) settled down $0.40 at $303.80 per short ton.
CBOT August soyoil futures (BOQ26) fell 0.96 cent to 68.86 cents per pound.
The USDA on Tuesday is expected to report U.S. soybean stocks on June 1 were up about 3.8% from a year earlier, and that farmers planted about 85.4 million acres of soybeans this spring, a Reuters poll of analysts showed.
Forecaster Commodity Weather Group said temperatures in the U.S. Midwest are likely to peak midweek, with falling temperatures after that and regular showers limiting crop stress.
The USDA reported that exporters sold 136,000 metric tons of soybeans to unknown destinations to 2026/2027 delivery.
The USDA is likely to leave its U.S. soybean crop condition ratings unchanged from last week in a weekly report, with 66% of soybeans expected to be in good-to-excellent condition, a Reuters poll of 11 analysts showed on Monday.
The USDA was due to publish its weekly crop progress and conditions report at 3 p.m. CDT (2000 GMT) on Monday.