To compare the impact of fundamental news with the publication of traders' positions in an event study framework, a generalized autoregressive conditional heteroscedasticity (GARCH) model with t-distributed error terms is applied to corn, soybean, and wheat futures returns from January 1996 to...

Many trends in the world wheat market might explain the extreme price movements on the U.S. wheat futures markets in 2007/08 and 2010. But the different price reactions on the three wheat futures markets raise doubt if only supply and demand moved wheat future prices. The question arises if the...