In economics, a commodity is the generic term for any marketable item produced to satisfy wants or needs. Economic commodities comprise goods and services.

The more specific meaning of the term commodity is applied to goods only. It is used to describe a class of goods for which there is demand, but which is supplied without qualitative differentiation across a market. A commodity has full or partial fungibility; that is, the market treats its instances as equivalent or nearly so with no regard to who produced them. "From the taste of wheat it is not possible to tell who produced it, a Russian serf, a French peasant or an English capitalist." Petroleum and copper are other examples of such commodities, their supply and demand being a part of one universal market. Items such as stereo systems, on the other hand, have many aspects of product differentiation, such as the brand, the user interface, the perceived quality, etc. And, the demand for one type of stereo may be much larger than demand on the other.

In contrast, one of the characteristics of a commodity good is that its price is determined as a function of its market as a whole. Well-established physical commodities have actively traded spot and derivative markets. Generally, these are basic resources and agricultural products such as iron ore, crude oil, coal, salt, sugar, coffee beans, soybeans, aluminum, copper, rice, wheat, gold, silver, palladium, and platinum. Soft commodities are goods that are grown, while hard commodities are the ones that are extracted through mining.

There is another important class of energy commodities which includes electricity, gas, coal and oil. Electricity has the particular characteristic that it is usually uneconomical to store; hence, electricity must be consumed as soon as it is produced.

Commodification (also called commoditization) occurs as a goods or services market loses differentiation across its supply base, often by the diffusion of the intellectual capital necessary to acquire or produce it efficiently. As such, goods that formerly carried premium margins for market participants have become commodities, such as generic pharmaceuticals and DRAM chips. Another example is the credit card product, where all suppliers offer almost identical interest rates, fees, rewards programs, and bait & hook incentive models for new customers. Since the core credit card product is essentially identical, the only remaining market differentiators are branding & customer service.

There is a spectrum of commodification, rather than a binary distinction of "commodity versus differentiable product". Few products have complete undifferentiability and hence fungibility; even electricity can be differentiated in the market based on its method of generation (e.g., fossil fuel, wind, solar). Many products' degree of commodification depends on the buyer's mentality and means. For example, milk, eggs, and notebook paper are considered by many customers as completely undifferentiable and fungible; lowest price is the only deciding factor in the purchasing choice. Other customers take into consideration other factors besides price, such as environmental sustainability and animal welfare. To these customers, distinctions such as "organic versus not" or "cage free versus not" count toward differentiating brands of milk or eggs, and percentage of recycled content or forestry council certification count toward differentiating brands of notebook paper.

Read more about Commodity:  Etymology, Global Commodities Trading Company, Commodity Trade, Inventory Data, Commodities in Marxism

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Famous quotes containing the word commodity:

    A commodity appears at first sight an extremely obvious, trivial thing. But its analysis brings out that it is a very strange thing, abounding in metaphysical subtleties and theological niceties.
    Karl Marx (1818–1883)

    If mass communications blend together harmoniously, and often unnoticeably, art, politics, religion, and philosophy with commercials, they bring these realms of culture to their common denominator—the commodity form. The music of the soul is also the music of salesmanship. Exchange value, not truth value, counts.
    Herbert Marcuse (1898–1979)

    There used to be a thing or a commodity we put great store by. It was called the People. Find out where the People have gone. I don’t mean the square-eyed toothpaste-and-hair-dye people or the new-car-or-bust people, or the success-and-coronary people. Maybe they never existed, but if there ever were the People, that’s the commodity the Declaration was talking about, and Mr. Lincoln.
    John Steinbeck (1902–1968)