In theory, regulation is supposed to set and enforce the rules of the game that market participants play by, in order to ensure that price discovery remains efficient, effective — and most important — fair.

In practice, there's plenty of debate to be had on how successful our regulators are in effecting their mission. And one investment class in particular, commodities, frequently comes under criticism for questionable price action.

So, this week we talk with Bart Chilton, former Commissioner of the Commodity Futures Trading Commission (CFTC), about price discovery within the commodity markets, and whether investors can have confidence in the "fairness" of the current system.