Connecting decision makers to a dynamic network of information, people and ideas, Bloomberg quickly and accurately delivers business and financial information, news and insight around the world. Prices surged last week by the most in 15 months after the U.S. Department of Agriculture unexpectedly cut its forecast of global inventories. That was fortuitous for some speculators. A day before the Oct. 12 USDA report, funds cut their record bets that prices would drop. Futures are crawling back from tough times earlier this year, when signs of the biggest supply overhang ever sent prices in August to the lowest in a decade....