The general grain and soy rally surged ahead overnight with soybeans and wheat reaching double-digit gains, while more timid corn futures managed to climb 3-4 cents. Speculation that China may commit to purchase a large amount of additional U.S. ag products and a list of weather concerns around the world kept active bids in the market. Trading volume was relatively high. It seemed that fear of missing the rally was bringing a variety of noncommercial traders, especially from Asia, into the market to get their share. Prices remained strong early during the day session with several new rally highs, but later prices hesitated and then began a slow downward crawl that lasted until the closing bell. Old crop soybeans closed more than 3 cents lo...