Fungibility Fungibility In economics, fungibility is the property of a good or a commodity whose individual units are essentially interchangeable. For example, since one kilogram of pure gold is equivalent to any other kilogram of pure gold, whether in the form of coins, ingots, or in other states, gold is fungible. Other fungible commodities include sweet crude oil, company shares, bonds, other precious metals, and currencies. Fungibility refers only to the equivalence of each unit of a commodity with other units of the same commodity and not to the exchange of one commodity for another, which is barter. The word "fungibility"
Commodity status of animals which Torssonen calls "sellfare," are "producible and salable at various points in the commodity chain," subject to competition like any other commodity. Commodity status of animals The commodity status of animals refers to the legal status as property of most non-human animals, particularly farmed animals, working animals and animals in sport, and their use as objects of trade. In the United States, Free-roaming animals ("ferae naturae") are (broadly) held in trust by the state; only if captured can be claimed as personal property. Animals regarded as commodities may be bought, sold, given away, bequeathed, killed, and used as commodity producers: