First the "tech bubble" then the "housing bubble" - now new food market derivatives are creating a "food bubble". Is there a way "to stop investors from turning the global food system into a casino that brings huge winnings to a few and hunger to millions?"
This is a complex issue. A recent article by Tom Philpott explains the situation in detail and offers a possible step toward counteracting it. If you care about global food security, this is a must read.