Last year, for the first time, it became possible to trade water on Wall Street through futures contracts. Normally reserved for commodities like oil or precious metals, water became the latest asset to join the financial market. But how could this practice impact the planet? The trading in the future prices of highly-prized commodities, where buyers agree to purchase an asset at a set date in the future for an agreed price, began in Japan in the seventeenth century with the trading in rice futures. The latest commodity to begin trading in futures is water supplied in American’s most populous state, California.