Ted Seifried analyzes recent price action in Corn futures, noting that December corn gave back Monday's gains to close near key support at 525. Seifried outlines the market's focus on ongoing U.S.-China trade talks, where traders are seeking confirmation on the $17 billion in agricultural purchases outlined earlier in the year. He also breaks down weekly export sales, which landed at the low end of expectations at 838,000 metric tons, and previews the upcoming quarterly grain stocks report.