Definition of Over-the-counter (o.t.c.)

Campbell R. Harvey's Hypertextual Finance Glossary
Over-the-counter (O.T.C.)
A decentralized market (as opposed to an exchange market) where geographically dispersed dealers are linked together by telephones and computer screens. The market is for securities not listed on a stock or bond exchange. The N.A.S.D.A.Q.  market is an O.T.C. market for U.S. stocks. Antithesis of listed.

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