In the wheat the net short positions when the wheat speculator in Chicago have increased to report last week to the 10 may 2016. An increase of 15.940 contracts resulted in a total 78.181 NET short positions. The speculators were continue on sale, what keeps the prices under pressure.
At the corn speculators in Chicago, the net long positions have reduced in the last week of the report to 28.063 contracts on now 42.969 net long positions. Thus the speculators do not put forth on rising prices.