What is the Opposite of oligopoly?

Answer 1

The opposite of oligopoly (where there are few sellers in a market), is a market in which there are only a few large buyers for a product or service. This is called a Oligopsony and usually allows the buyers to exert a great deal of control over the sellers, often resulting in the depression of prices.

Examples would be world commodity markets in agricultural crops such as coffee were a few international intermediaries are able to trade the multitude of producers off against one another in order to extract cheap resources.