26 Nov 2018 The pink sheets, also known as the over-the-counter (OTC) market, are a There are more than 10,000 stocks trading on the OTC markets. An over-the-counter (OTC) market is a decentralized market in which market participants trade stocks, commodities, currencies or other instruments directly between two parties and without a central exchange or broker. Over-the-counter markets do not have physical locations; instead, Over-the-counter market, trading in stocks and bonds that does not take place on stock exchanges. It is most significant in the United States, where requirements for listing stocks on the exchanges are quite strict. It is often called the “off-board market” and sometimes the “unlisted market,”