Dark Pools and Alternative Trading Venues

Dark pools and alternative trading venues are nontraditional venues where securities may trade away from a primary exchange order book. This branch covers dark pools, multilateral trading facilities, third-market trading, and the historical Unlisted Securities Market.

Use these pages when the practical issue is how venue structure affects displayed liquidity, access, execution evidence, price discovery, market impact, or trade reporting.

What This Branch Covers

Decision Lens

Start with the execution report and venue code. Dark or alternative venue analysis should focus on whether the order interacted with displayed quotes, hidden liquidity, midpoint pricing, negotiated access, or post-trade reporting.

Evaluation Checklist

• Confirm the venue, order type, execution price, reference price, and trade-reporting record.
• Check whether the security is exchange-listed, OTC, or unlisted.
• Distinguish pre-trade transparency from post-trade reporting.
• Compare execution quality using the relevant benchmark, not just the venue label.
• Avoid treating venue type alone as a recommendation to use or avoid a trading channel.

Common Mistakes

• Assuming hidden liquidity means poor execution without checking the actual fill evidence.
• Treating every alternative venue as an OTC market.
• Ignoring trade size, information leakage, access rules, and reporting delays.
• Using historical venue names as if they were current trading options.

In this section

Choose a subsection first. Deeper term pages live inside each subsection, which keeps large topic hubs readable.