| InvestHub.com's Finance Dictionary and Glossary of Investment Terms fourth market Definition 1.
The direct trading of large blocks of securities between institutional investors through a computer network, rather than on an exchange. | Definition 2.
Refers to the practice of institutional investors trading large blocks of securities directly to avoid brokerage commissions. See: Instinet. | Definition 3.
The direct trading of large blocks of securities between institutional investors through a computer network. (See INSTINET, third market) |
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