Market Surveillance
The monitoring of trading activity by exchanges and regulators to detect manipulation, fraud, and other illegal practices.
What is Market Surveillance?
Market surveillance is the systematic monitoring of trading activity across financial markets to identify patterns that may indicate manipulation, insider trading, spoofing, wash trading, front-running, or other violations of securities laws and exchange rules. Exchanges operate their own real-time surveillance systems that flag unusual trading patterns—such as large price moves before major news announcements or suspicious order cancellation patterns. Regulatory bodies including the SEC, FINRA, and CFTC maintain their own cross-market surveillance programs. The Financial Industry Regulatory Authority (FINRA) operates one of the world's largest market surveillance programs, reviewing billions of trades daily. Suspicious activities are escalated for investigation and, if violations are confirmed, can result in enforcement actions including fines, disgorgement of profits, trading suspensions, and criminal referrals.
Example
Before a pharmaceutical company announces a successful drug trial, surveillance systems might detect an unusual spike in call option purchases on the stock—suggesting someone traded on material non-public information. FINRA's cross-market surveillance would flag this activity, potentially triggering an SEC investigation into insider trading.
Source: FINRA — Market Regulation