Types of Commodities
1. Agricultural
Agricultural commodities are those such as coffee, corn – an important source of food for livestock and humans, sugar, soybeans – whose oil is used for making crackers, breads, cakes, and cookies, and wheat – one of the most important food crops in the world.
2. Energy
Energy commodities include crude oil used in transportation activities and production of plastics, natural gas used for electricity generation, and gasoline, which powers light-duty trucks and cars.
3. Metals
Metals include gold, used in making jewelry; silver, also used for jewelry and many other industrial uses as well; and copper, the most widely used form of electrical wiring.
How are Commodities Traded?
Most commodities are traded on commodities exchanges, which include the New York Mercantile Exchange (NYMEX), the Chicago Mercantile Exchange, the Chicago Board of Options Exchange (CBOE), the Kansas City Board of Trade, the Minneapolis Grain Exchange, and the Chicago Board of Trade (CBOT). Investors may opt for indirect exposure through stocks, exchange-traded funds, and mutual funds.
Differentiated Products
Commodities and differentiated products are both traded in the commodity markets, but they differ in a few ways, as discussed below.

Commodities are interchangeable, and every kind is the same regardless of their source. This means that crude oil from one producer is the same crude oil from another producer. The goods can be combined without affecting the quality of the commodity.

Differentiated products, on the other hand, are unique products or those that are not like the generic version of the products. For example, regular gasoline is priced in the same way across all oil companies. However, if they produce high-octane gasoline, the product becomes better than what the competitors are selling.