Editing Commodity price index (section)

==Categories==
The constituents in a commodity price index can be broadly grouped into the following categories:
*Energy (such as Coal, Crude Oil, Ethanol, Gas Oil, Gasoline, Heating Oil, Natural Gas, Propane)
*Metals
**[[Base metal]]s (such as Lead, Zinc, Nickel, Copper)
**[[Precious metal]]s (such as Gold, Silver, Platinum, Palladium)
*Agriculture
**Grains (such as Corn, Oats, Rice, Soybeans, Wheat)
**Softs (such as Coffee, Cocoa, Sugar, Butter, Cotton, Milk, Orange Juice)
**Livestock (such as Hogs, Live Cattle, Pork Bellies, Feeder Cattle)