What are the different types of commodities that are traded in these markets?

What are the different types of commodities that are traded in these markets?

World-over one will find that a market exits for almost all the commodities known to us. These commodities can be broadly classified into the following:
Precious Metals: Gold, Silver, Platinum etc
Other Metals: Nickel, Aluminum, Copper etc
Agro-Based Commodities: Wheat, Corn, Cotton, Oils, Oilseeds, etc.
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