Huge thanks to a sharp eyed reader for emailing this piece which explains in less than 2000 words a topic that I've spilled billions of electrons over.
From Foreign Policy:
Demand and supply certainly matter. But there's another reason why food across the world has become so expensive: Wall Street greed.If you do a search of Climateer Investing using GSCI or Goldman + oil as keywords you can find a lot of backround material. We've been beating this drum for a few years now.
It took the brilliant minds of Goldman Sachs to realize the simple truth that nothing is more valuable than our daily bread. And where there's value, there's money to be made. In 1991, Goldman bankers, led by their prescient president Gary Cohn, came up with a new kind of investment product, a derivative that tracked 24 raw materials, from precious metals and energy to coffee, cocoa, cattle, corn, hogs, soy, and wheat. They weighted the investment value of each element, blended and commingled the parts into sums, then reduced what had been a complicated collection of real things into a mathematical formula that could be expressed as a single manifestation, to be known henceforth as the Goldman Sachs Commodity Index (GSCI).
For just under a decade, the GSCI remained a relatively static investment vehicle, as bankers remained more interested in risk and collateralized debt than in anything that could be literally sowed or reaped. Then, in 1999, the Commodities Futures Trading Commission deregulated futures markets. All of a sudden, bankers could take as large a position in grains as they liked, an opportunity that had, since the Great Depression, only been available to those who actually had something to do with the production of our food.
Change was coming to the great grain exchanges of Chicago, Minneapolis, and Kansas City -- which for 150 years had helped to moderate the peaks and valleys of global food prices. Farming may seem bucolic, but it is an inherently volatile industry, subject to the vicissitudes of weather, disease, and disaster. The grain futures trading system pioneered after the American Civil War by the founders of Archer Daniels Midland, General Mills, and Pillsbury helped to establish America as a financial juggernaut to rival and eventually surpass Europe. The grain markets also insulated American farmers and millers from the inherent risks of their profession.....
...But Goldman's index perverted the symmetry of this system. The structure of the GSCI paid no heed to the centuries-old buy-sell/sell-buy patterns. This newfangled derivative product was "long only," which meant the product was constructed to buy commodities, and only buy. At the bottom of this "long-only" strategy lay an intent to transform an investment in commodities (previously the purview of specialists) into something that looked a great deal like an investment in a stock -- the kind of asset class wherein anyone could park their money and let it accrue for decades (along the lines of General Electric or Apple). Once the commodity market had been made to look more like the stock market, bankers could expect new influxes of ready cash. But the long-only strategy possessed a flaw, at least for those of us who eat. The GSCI did not include a mechanism to sell or "short" a commodity.....MORE
Another keyword search would be long-only index investor.