Chicago Board of Trade corn futures sagged by midday Friday on US harvest pressure and positioning ahead of Tuesday's USDA October crop supply and demand report.
CBOT corn futures were down 1 to 1-3/4 cents, with December down 1 cent at $2.05 a bushel and March 1-1/2 lower at $2.15-1/2.
Cargill Investor Services sold 800 December early while Fimat Futures bought 500 March and 500 December, brokers said.
The US Department of Agriculture will update its 2004 US corn production forecast on Tuesday at 7:30 am CDT (1230 GMT).
The much-awaited government crop assessment will follow analysts' forecasts this week for a 2004 US corn crop of 11.156 billion to 11.375 billion bushels.