The "OTC Bulletin Board" or "Over-the-Counter Bulletin Board" refers to an electronic trading service for companies to list shares which either do not meet the requirements of major stock exchanges, or for companies who do not choose to have their shares listed on such exchanges. During the trading day, the OTC Bulletin Board provides updated real-time bid and ask prices, volume information, and last-sale prices. Stock that trade on the OTC Bulletin Board have the suffix ".OB".