The Food Bubble (2010)
It is a bit disconcerting to me that commenters here are fascinated by the technical analysis of this system and appear quite oblivious to the problem of <i>starving human beings.</i><p>Perhaps I am not intellectual enough to appreciate the empathy hiding behind this analytical ruminating about the problem - but I wish that I got the impression that there was more reaction happening than "Wow, what an interesting phenomenon in the commodities market- how do all of these moving pieces fit together?"<p>To quote the sometimes poignant Jack Johnson: 
<i>"Why don't the newscasters cry when they read about people who die?
At least they could be decent enough to put just a tear in their eyes"</i>