CBOT December corn was flat at $3.75-1/4 a bushel. Corn futures were little changed, despite pressure from bearish weekly ethanol data. The US Energy Information Administration said weekly US output of corn-based ethanol fell to 1.01 million barrels per day, the lowest since April, while stocks of the biofuel rose to 24.13 million barrels. A stronger dollar added pressure, making US grains more expensive to those holding other currencies.