In finance, cornering the market consists of obtaining sufficient control of a particular stock, commodity, or other asset in an attempt to manipulate the market price.
Companies that have cornered their markets have usually done so in an attempt to gain greater leeway in their decisions; for example, they may desire to charge higher prices for their products without fears of losing too much business. The cornerer hopes to gain control of enough of the supply of the commodity to be able to set the price for it.