【详细解释】 一种通过电话，传真以及其他电子形式的通信发生交易的交易商市场，与在交易场内进行的交易相反。至少对立交易方中的一个是交易商。在交易所交易中，卖方和卖方都不可能是交易商。某些股票，多数债券以及所有的柜台市场衍生工具在柜台市场上进行交易。
A stock is traded over the counter usually because the company is small and unable to meet listing requirements of the exchanges. Also known as unlisted stock, these securities are traded by brokers/dealers who negotiate directly with one another over computer networks and by phone。