Corn, wheat and soybean futures prices all posted new contract lows during the day session today in slow trade. Momentum following funds continued to sell all three markets, and why not? General Comments It was generally a day of slow and low with the market casting off any fears from a potential freeze. Instead, markets are mesmerized by the startlingly high corn and soybean yields in the Delta and southern fringes of the Corn Belt. Traders wonder to what extent the "big crops get bigger" theory will be reflected in Thursday's USDA WASDE. The average trade guess for the corn yield is now over 170 bushels/acre with the soybean yield around 46.5 bushels/acre.Prices began to slide early in overnight trade under the weight of historically hi...