One of the big themes these days is the return of the 'real' economy. You can't solve problems these days with just money. Not everything can be done by sitting behind a screen. And so some of the most important players in this new environment are the commodity trading shops, which help arrange financing and delivery of oil, coal, natural gas, nickel and everything else you can think of across the far-flung corners of the globe. It's a very different type of business than most trading, which is mostly just about charts on a screen. On this episode we speak with long-time commodities journalist turned Bloomberg Opinion columnist Javier Blas -- the co-author of 'The World For Sale: Money, Power, and the Traders Who Barter the Earth's Resources' -- to get a deeper understanding of how these firms operate, and how they're dealing with this environment of surging commodity prices and extreme volatility.