CBOT corn futures ended fractionally higher after a choppy session as traders squared positions a day ahead of monthly supply/demand reports from the US Department of Agriculture. Govt to trim its estimates of the US 2017 corn yield and 2017/18 US corn ending stocks and harvest as 4% complete. USDA reported export inspections of US corn in the latest week at 662,173 tonnes, below a range of trade expectations for 700,000 to 900,000 tonnes.