USDA's April estimates of ending 2014/15 stocks, both for the U.S. and the world, probably command the greatest interest for grain traders and analysts.Each year, the April WASDE is notable mainly because it incorporates whatever changes in U.S. supply/demand balances are indicated by the quarterly stocks report as of 1 March, which USDA releases 10 day earlier. It also updates Southern Hemisphere production estimates, particularly for Brazilian and Argentine soybeans and corn. Since private analysts have had a great deal of time to parse the significance of the 1 March U.S. stocks numbers and a multitude of private crop watchers in Brazil and Argentina give out their own production estimates seemingly on a daily basis, market-moving surpri...