Corn futures were firm early on Tuesday on light short covering ahead of the release early Wednesday of USDA's October crop production and supply/demand reports, traders said.
At 10:15 am CDT (1515 GMT), CBOT corn was up 1/4 to 1-1/4 cents per bushel. December was up 1 at $2.03 per bushel.
FIMAT Futures and ABN Amro each bought 200 December, pit sources said. The nine-day relative strength index for December closed Monday at 32. Chartists view a reading of 30 or less as an indication of an oversold market.