(Lisa Guenther photo)

U.S. grains: Corn, soy tumble to contract lows on record U.S. yield prospects

Chicago | Reuters — U.S. corn tumbled to a four-year low while soybean futures fell one per cent on Wednesday after the government unexpectedly lifted condition ratings for the crops and analysts increased outlooks for what already were expected to be record-large harvests in the U.S. Wheat futures also declined sharply, with prices extending losses