Corn prices had received a boost earlier when USDA estimated stockpiles of the grain before the next harvest would total 1.777 bil bu, down from February estimate of 1.827 bil and below analyst forecasts for 1.822 bil. The number reflected USDA's expectations of stronger demand for corn from livestock producers and overseas buyers. They also cut forecast for global corn stockpiles, surprising to the market. The report briefly drove prices higher, but traders said the reduction in expected supplies wasn't large enough to sustain a rally. Corn market "had every reason to go higher off the report," but the lack of momentum shows traders are worried about other factors, including the potential for a third-straight bumper U.S. crop this year. The surging U.S. dollar also weighed on prices, USD jumping 0.9% against a basket of international currencies. May corn, the most actively traded contract, fell 3/4 cent, or 0.2%, to $3.88 a bushel. Corn prices have tumbled in two years as U.S. growers produced consecutive record crops. But demand for corn from buyers, has been relatively healthy, limiting declines.