Only government-owned companies may implement monopoly, monopsony, oligopoly and oligopsony, but not private companies,
2.
CBOT wanted to curb the power of these monopsony / oligopsony type of buyers by making prices the same for everyone after hours.
3.
Forms include monopoly ( in which there is only one seller of a good ), duopoly ( in which there are only two sellers of a good ), oligopoly ( in which there are few sellers of a good ), monopolistic competition ( in which there are many sellers producing highly differentiated goods ), monopsony ( in which there is only one buyer of a good ), and oligopsony ( in which there are few buyers of a good ).
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