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What Is Over-the-Counter (OTC)?

By Robin Hartill, CFP – Updated Oct 13, 2025 at 6:52PM

Key Points

  • OTC trading involves securities not listed on major exchanges, requiring diligence due to low transparency.
  • OTC Markets Group offers tiered exchanges; top tier OTCQX has the strictest transparency rules.
  • Investing in OTC securities can expose you to risks like low liquidity and high volatility.
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