In commodities markets, trading or buying and selling of goods is often done through futures contracts and in commodity exchanges, which are responsible for standardizing the volume and minimum quality of the goods exchanged. The Chicago Chamber of Commerce, for example, states in its rules that a futures wheat contract will include 5,000 bushels (a container with a capacity equivalent to a bushel equivalent to 36.4 liters of dry or liquid goods) and also specify the size of each grain. Many types of commodities can be traded, such as metals, energy, livestock and meat, and agriculture. Popular exchanges in the United States include the Chicago Mercantile Exchange (CME), Chicago Board of Trade (CBOT), New York Mercantile Exchange (NYMEX), and New York Board of Trade (NYBOT).
