Browse Market Structure

OTC, Dark Pools, and Alternative Trading Systems

OTC market, dark-pool, multilateral trading facility, pink-market, and alternative trading system terms.

Alternative trading systems and OTC venues sit outside the classic listed-exchange model. This subtopic groups private, fragmented, dealer, and less transparent market structures for easier comparison.

In this section

  • Dark Pools and Alternative Trading Venues
    Dark pool, MTF, third-market, USM, and Virt-X terms used for nontraditional trading venues.
  • OTC Markets and Quotation Tiers
    OTC market, quotation tier, pink market, and regional OTC venue terms used in off-exchange securities trading.
    • OTC Market Tiers
      OTC market terms for OTC Markets Group, pink market, OTCQB, OTCQX, and quotation tier labels.
      • OTC Market
        A comprehensive overview of the Over-the-Counter (OTC) Market, including its historical context, types, key events, detailed explanations, and applications in finance and trading.
      • OTC Markets Group
        A detailed exploration of OTC Markets Group, including its structure, functions, and frequently asked questions. Learn about the largest U.S. electronic quotation and trading system for over-the-counter (OTC) securities.
      • OTC Pink
        Learn what OTC Pink is, why companies trade there, and why investors usually treat it as a higher-risk corner of the over-the-counter market.
      • OTCQB (The Venture Market)
        A comprehensive guide to the OTCQB, the middle tier of the three marketplaces for trading over-the-counter (OTC) stocks operated by the OTC Markets Group. Discover its definition, stocks involved, and the benefits for investors and companies.
      • OTCQX Overview
        A comprehensive overview of OTCQX, including its definition, the criteria for stocks listed on this tier, and a comparison with other OTC markets provided by the OTC Markets Group.
      • Pink Market: Listings for Over-the-Counter Stocks
        An overview of the Pink Market, highlighting the significance and characteristics of stocks that trade over-the-counter (OTC) in the U.S.
    • OTC Quotation and Specialized Markets
      OTC market terms for bulletin-board quotation systems and specialized over-the-counter exchanges.
      • OTC Bulletin Board
        A comprehensive overview of the OTC Bulletin Board (OTCBB), a regulated quotation service for equities sold on the US over-the-counter market, including its history, importance, key events, and more.
      • Over-The-Counter Exchange of India (OTCEI)
        Comprehensive guide to the Over-The-Counter Exchange of India (OTCEI), highlighting its features, requirements, historical context, and its impact on small- and medium-sized enterprises in India.
Revised on Monday, May 18, 2026