As of 10:45 a.m. CST (1645 GMT), CBOT December wheat was up 2-1/4 cents at $3.19-1/4 per bushel, with deferred months up 1 to 2-1/4 cents.
Fimat Futures and Tenco Inc. were early buyers of 100 to 200 December contracts apiece, traders said.
Signs the wheat market was oversold and due for a rebound included the nine-day relative strength index for December, which stood at 29 after Monday's close.