Glossary term
Front-Running
Front-running is trading ahead of a known or anticipated customer order or market-moving transaction to profit from that information.
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What Is Front-Running?
Front-running is trading ahead of a known or anticipated customer order or market-moving transaction to profit from the expected price impact. In regulated securities markets, front-running can violate rules when a broker, trader, or associated person misuses knowledge of a customer's imminent order.
The core problem is unfair use of information. A market professional who knows a large customer order is about to be executed may be able to trade first, benefit from the price movement, and harm the customer or market integrity.
Key Takeaways
- Front-running involves trading ahead of customer or market-moving order information.
- It can place the professional's interest ahead of the customer's interest.
- FINRA Rule 5270 addresses front-running of block transactions.
- Related conduct may also raise best execution, customer order protection, or antifraud issues.
- Front-running undermines trust in fair markets.
How Front-Running Works
A trader learns that a large customer buy order is about to enter the market. If the trader buys first for a personal, proprietary, or favored account and then benefits when the customer order pushes the price higher, that is the classic front-running concern.
Front-running can involve equities, options, bonds, or other securities, depending on the facts and rules. It can also involve trading related instruments if the trader uses order information in one market to profit in another.
Regulators focus on timing, knowledge, intent, account relationships, customer impact, and whether the information was public. Legitimate market making and hedging can be complex, but misuse of customer order information is the central risk.
Front-Running Compared With Related Conduct
Conduct | Core issue | Why it matters |
|---|---|---|
Front-running | Trading ahead of customer order information | Misuses nonpublic order information |
Insider trading | Trading on material nonpublic corporate information | Misuses confidential issuer information |
Best execution failure | Poor handling of customer order | Can harm execution quality |
Market manipulation | Artificially affecting market prices | Distorts fair trading |
Limits and Misunderstandings
Not every trade before a large order is front-running. The key questions include what the trader knew, whether the information was public, whose interest was served, and whether a duty or rule was violated.
Front-running also is not limited to dramatic examples. Smaller patterns of trading around customer orders can still raise regulatory and ethical concerns.
This entry is educational, not legal advice. Whether conduct violates securities law or FINRA rules depends on the facts, market, accounts, timing, and applicable rules.
The Bottom Line
Front-running is unfair trading ahead of customer or market-moving order information. It matters because market participants need confidence that professionals will not exploit order knowledge at the customer's expense.