What Counts as Market Abuse
Market abuse is a broader legal category than most people assume — it covers not just insider trading but manipulation, unlawful disclosure and attempted abuse, and it can be committed without ever placing a trade at all.
Most people, asked what "market abuse" means, describe one scenario: someone trades on a secret they weren't supposed to have. That's real and it's a large part of the category, but the legal definition used by regulators like the FCA under the EU/UK Market Abuse Regulation, or the SEC and CFTC under US law, is considerably wider. It covers manipulating a price with no inside information involved at all, disclosing information unlawfully with no trade attached, and even attempting either — none of which require the classic image of a tipster and a trade.
The four buckets
| Category | What it is | Does a trade have to happen? |
|---|---|---|
| Insider dealing | Trading (or advising others to trade) using material non-public information | Yes, by the trader |
| Unlawful disclosure | Passing material non-public information to someone with no legitimate reason to have it | No — disclosure alone is the violation |
| Market manipulation | Creating a false or misleading impression of price, supply or demand | Often yes, but the trades themselves may be individually legal |
| Attempted insider dealing / manipulation | Trying to do either of the above and failing, or being stopped first | No completed trade required at all |
The fourth bucket surprises people most. A trader who receives inside information, places an order, and has that order rejected or reversed before it executes has still committed attempted insider dealing under most regulatory frameworks — the offence is in the intent and the action taken toward it, not in whether the trade actually cleared.
Market abuse is defined by the effect on market integrity, not by whether a specific rule about "insider trading" was technically broken. A trader can manipulate a price using only publicly available information and completely legal individual trades, and still be committing market abuse because of the misleading pattern those trades create together.
Manipulation without any secret information
This is the part that most clearly separates market abuse from insider dealing: manipulation needs no inside information at all. Classic patterns include:
- Spoofing/layering — placing orders with no intention to execute them, to create a false impression of demand and move the price, then cancelling before they fill (see Spoofing And Layering).
- Wash trading — trading with oneself or a coordinated counterparty to fabricate volume that suggests genuine interest.
- Marking the close — placing trades near the close specifically to move the closing price to a favorable level for an unrelated position or valuation.
None of these require a secret. They require intent to mislead the market about genuine supply, demand or price, using entirely public, individually-legal-looking orders.
Where insider dealing fits in
Insider dealing — trading on material non-public information — is the most familiar bucket and the one with the clearest fact pattern to prove: did the trader have MNPI, and did they trade on it. What actually counts as material and non-public is its own detailed question, covered in What Makes Information Material and Non-Public, and the legal theory for why trading on it is unlawful in the US specifically is covered in Insider Dealing and the Classical Theory.
It's a common misconception that avoiding insider information is sufficient to avoid market abuse entirely. A desk with a clean information wall can still commit market abuse through manipulative trading patterns that involve no inside information whatsoever — the two are overlapping but genuinely separate categories, and surveillance systems are built to catch both, not just one (see Trade Surveillance Systems and Alert Tuning).
Further reading
- EU Market Abuse Regulation (MAR)
- SEC, Securities Exchange Act of 1934, Section 10(b)