In the last decade, the majority of the world’s stock markets have converted to electronic platforms. In the United States, the New York Stock Exchange remains a human-mediated auction market operated by specialists. The NASDAQ market, however, is electronic, made up of multiple market makers who trade over a network of computers. Why are electronic markets like NASDAQ so popular, and how do they actually match bids and offers? In this conference, another in the AEI series on securities market structure, two NASDAQ officers will demonstrate how shares are traded on NASDAQ using the actual screens, servers, and software that are used every trading day in the NASDAQ market.