Over-The-Counter Market
A decentralized market of securities not listed on an exchange where market participants trade over the telephone, facsimile or electronic network instead of a physical trading floor. There is no central exchange or meeting place for this market. Also referred to as the "OTC market".
Investopedia Says:
In the OTC market, trading occurs via a network of middlemen, called dealers, who carry inventories of securities to facilitate the buy and sell orders of investors, rather than providing the order matchmaking service seen in specialist exchanges such as the NYSE.
Related Links:
Knowing how the primary and secondary markets work is key to understanding how stocks trade. Markets Demystified
Learn about the systems that run the market. Topics include market makers, specialists, SuperDOT, ECNs, SOES, Level I, II, and III Access, and more. Electronic Trading Tutorial
Find out the answers to all the questions you had about stock exchanges but were afraid to ask! Getting to Know Stock Exchanges
Learn some of the important differences in the way they operate and the securities that trade on them. The Tale Of Two Exchanges: NYSE And Nasdaq



