Alternative Trading Systems

In addition to broker and dealer markets, alternative trading systems such as electronic communications networks (ECNs) make securities transactions. ECNs are private trading networks that allow institutional traders and some individuals to make direct transactions in what is called the fourth market. ECNs bypass brokers and dealers to automatically match electronic buy and sell orders. They are most effective for high-volume, actively traded stocks. Money managers and institutions such as pension funds and mutual funds with large amounts of money to invest like ECNs because they cost far less than other trading venues.