For over a century, farmers in wealthy countries have been able to engage in a process where they protect themselves against risk. Farmer Giles can agree in January to sell his crop to a trader in August at a fixed price. If he has a great summer, he'll lose some cash, but if there's a lousy summer or the global price collapses, he'll do well from the deal. When this process was tightly regulated and only companies with a direct interest in the field could get involved, it worked.
Then, through the 1990s, Goldman Sachs and others lobbied hard and the regulations were abolished. Suddenly, these contracts were turned into "derivatives" that could be bought and sold among traders who had nothing to do with agriculture. A market in "food speculation" was born.
So Farmer Giles still agrees to sell his crop in advance to a trader for £10,000. But now, that contract can be sold on to speculators, who treat the contract itself as an object of potential wealth. Goldman Sachs can buy it and sell it on for £20,000 to Deutsche Bank, who sell it on for £30,000 to Merrill Lynch – and on and on until it seems to bear almost no relationship to Farmer Giles's crop at all.
If this seems mystifying, it is. John Lanchester, in his superb guide to the world of finance, Whoops! Why Everybody Owes Everyone and No One Can Pay, explains: "Finance, like other forms of human behaviour, underwent a change in the 20th century, a shift equivalent to the emergence of modernism in the arts – a break with common sense, a turn towards self-referentiality and abstraction and notions that couldn't be explained in workaday English." Poetry found its break with realism when T S Eliot wrote "The Wasteland". Finance found its Wasteland moment in the 1970s, when it began to be dominated by complex financial instruments that even the people selling them didn't fully understand.
So what has this got to do with the bread on Abiba's plate? Until deregulation, the price for food was set by the forces of supply and demand for food itself. (This was already deeply imperfect: it left a billion people hungry.) But after deregulation, it was no longer just a market in food. It became, at the same time, a market in food contracts based on theoretical future crops – and the speculators drove the price through the roof.
Here's how it happened. In 2006, financial speculators like Goldmans pulled out of the collapsing US real estate market. They reckoned food prices would stay steady or rise while the rest of the economy tanked, so they switched their funds there. Suddenly, the world's frightened investors stampeded on to this ground.
So while the supply and demand of food stayed pretty much the same, the supply and demand for derivatives based on food massively rose – which meant the all-rolled-into-one price shot up, and the starvation began. The bubble only burst in March 2008 when the situation got so bad in the US that the speculators had to slash their spending to cover their losses back home.
When I asked Merrill Lynch's spokesman to comment on the charge of causing mass hunger, he said: "Huh. I didn't know about that." He later emailed to say: "I am going to decline comment." Deutsche Bank also refused to comment. Goldman Sachs were more detailed, saying they sold their index in early 2007 and pointing out that "serious analyses ... have concluded index funds did not cause a bubble in commodity futures prices", offering as evidence a statement by the OECD.
How do we know this is wrong? As Professor Ghosh points out, some vital crops are not traded on the futures markets, including millet, cassava, and potatoes. Their price rose a little during this period – but only a fraction as much as the ones affected by speculation.
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