What is a market with only a few capable and competent suppliers called?

A market characterized by having only a few capable and competent suppliers is referred to as a restricted marketplace. In such a market, the limited number of suppliers results in a concentration of power among those suppliers, which can influence pricing, availability, and overall market conditions.

Restricted marketplaces often lead to less competition and can create barriers for new entrants who may wish to supply goods or services, thus limiting consumer choices. The suppliers in this context are significant players who have the upper hand in negotiations due to their limited numbers and specialized capabilities, reinforcing the market's restricted nature.