Why is this being investigated by the AG Committee?
MF Global was a commodities trading company. Who unknown to many of their commodities customers were extremely heavy in the derivatives market. (much more speculative) At this point it seems many of the "customers" who lost money were AG producers who hedged their livestock and crops. The fraud was much much bigger than that.
Because it involved hedging and speculating in farm commodity prices which is a topic that the AG committee may have purview over.