When a large number of securities is offered for purchase purchase or sale in large order, this is what is referred to as a block order. Block order are usually above ten thousand shares of the same stock. A special kind of system is used in entering trades and an average price per share is allocated to each share. Block orders are usually managed by institutional investors who spread out orders over different portfolios or accounts.
A block order is also referred to as a block trade.in the event of a need to sell of the shares by traders, they sell at a discounted price.