commoditas

Commodity derives from Latin commoditas, meaning 'convenience, fitness, advantage, a favorable circumstance,' from commodus ('convenient, suitable, fitting'), itself from com- (together, thoroughly) and modus ('measure, manner, method'). The word named the quality of being well-suited to a purpose — the commoditas of a harbor was its suitability for anchoring ships; the commoditas of a location was its advantage for trade or defense. The word entered Old French as commodité and English as 'commodity' in the fifteenth century, initially carrying its Latin sense of convenience, profit, or advantage. A commodity was whatever was useful, whatever suited one's purposes.

The semantic narrowing from 'anything useful' to 'a tradeable good' occurred gradually through the sixteenth and seventeenth centuries, as the expansion of long-distance trade created the need for precise vocabulary around standardized goods. A commodity, in the emerging commercial vocabulary, was a good that could be traded interchangeably — pepper from one source was indistinguishable from pepper from another; copper from one mine was equivalent to copper from another. The commodity was defined by its fungibility: any unit of a commodity was as good as any other unit of the same grade. This indistinguishability was both the commodity's commercial virtue (it could be traded at scale without inspection of each unit) and its economic significance (only the price distinguished one lot from another).

Karl Marx elevated the commodity to a philosophical category in Das Kapital (1867), arguing that the commodity form — the reduction of goods to their exchange value, their price — was the fundamental cell of capitalist society. In Marx's analysis, the commodity concealed what he called 'the mystical character of the commodity': the social relations of labor hidden within a traded object. A bolt of cloth appeared to be simply a thing with a price, but the price concealed the specific human labor that produced it, the working conditions of the workers, the economic relationships between factory owner and factory hand. Marx called this concealment 'commodity fetishism' — the treatment of social relationships as relationships between things. The Latin word for convenience had become the name for capitalism's defining abstraction.

Financial commodity markets — futures exchanges where standardized contracts for agricultural products, metals, energy, and financial instruments are traded — have pushed the concept to its extreme. In a futures market, what is traded is not the physical commodity itself but a contract for its future delivery at a specified price. Speculators who have never seen a bushel of wheat and never intend to receive one buy and sell wheat futures, their trades affecting the price that farmers receive and consumers pay. The commoditas — the convenient, suitable thing — has become pure price, pure number, detached from the physical object it nominally represents. The Latin word for fitness and advantage now names the process by which things are reduced to their most abstract financial representation.