Market abuse is conduct that damages the fairness or integrity of a market. Under the EU Market Abuse Regulation, the umbrella includes insider dealing, unlawful disclosure of inside information, and market manipulation. Market manipulation is the branch involving conduct or information that gives false or misleading signals, secures an abnormal or artificial price, or otherwise uses deception within the rule's scope.
In plain terms — A strange chart, a large order, or a burst of volume is a reason to ask a precise question. It is not proof that someone manipulated the market.
Observation: describe what happened
Begin with facts that another analyst could reproduce: the instrument, venue, time window, orders, executions, quoted depth, price, volume, public messages, and relevant disclosures. “The price rose 18% between 10:02 and 10:07” is an observation; “the move was manipulated” is already a conclusion.
Executed volume counts transactions, not the independence or genuine economic interest of the counterparties. Displayed order-book size is not executed volume and can change for many legitimate reasons.
Hypothesis: state the suspected mechanism
A useful hypothesis names a mechanism that can be tested. A promotion may have preceded undisclosed selling; non-bona fide orders may have created apparent pressure; linked accounts may have traded without changing beneficial economic interest. Each mechanism points to different evidence and different ordinary explanations.
The main families include pump and dump, spoofing, layering, and wash trading. The labels can overlap, and their legal meaning is not identical across jurisdictions.
Evidence: connect conduct, actor, and effect
Market data can reveal sequence and repetition. Order and trade records can connect displayed interest with fills and cancellations. Account ownership, funding flows, communications, position changes, disclosures, and algorithm logs can connect conduct to a person, purpose, or benefit. A chart alone rarely does all of this.
Professionals test alternative explanations: news, rebalancing, hedging, liquidity withdrawal, an erroneous order, ordinary order management, and independent traders reacting to the same information. Evidence should also be preserved at its original timestamp, because a later screenshot may omit the state of the book or a deleted promotion.
Context: identify the rule and its perimeter
The relevant market, instrument, venue, jurisdiction, and date determine which rule applies. Some rules focus on intent; others also address effect, attempted conduct, disseminated information, related instruments, or conduct outside a venue. Crypto-assets may fall under a dedicated regime such as MiCA in the EU, while derivatives, securities, spot commodities, and venues can have different perimeters elsewhere.
EU Delegated Regulation 2026/788 updated market-manipulation indicators to reflect, among other matters, time windows that can be shorter or longer than a session and patterns across orders, transactions, volume, and related exposures. An indicator helps surveillance; it is not automatic proof of a violation.
Classification: keep signal, evidence, and decision separate
A surveillance alert is a lead, not a verdict. A compliance team or authority reconstructs the facts, applies the relevant rule, and considers intent, effect, exceptions, and evidential standard as required. A private observer normally lacks account identities, communications, and full cross-venue data, so the responsible action is to preserve the facts and report them to the venue or competent authority rather than publicly identify an alleged actor.
Common mistake — Treating a repeated pattern as a universal legal definition. The same observable event can have different explanations and different legal treatment across instruments, venues, countries, and dates.
Sources
- EUR-Lex — Market Abuse Regulation, consolidated text as of 5 June 2026 — Article 1 defines the market-abuse framework; Article 12 defines market manipulation and Annex I lists indicators.
- EUR-Lex — Commission Delegated Regulation (EU) 2026/788 — updates the non-exhaustive indicators of manipulative behaviour, including order-book, time-window, volume, and cross-exposure patterns.
- ESMA — Market integrity — institutional overview of EU work on market abuse, surveillance, and supervisory convergence.
- EUR-Lex — Markets in Crypto-Assets Regulation, Articles 86–92 — the EU market-abuse regime for crypto-assets, including the definition and prohibition of manipulation.
- ESMA — Guidelines on supervisory practices to prevent and detect market abuse under MiCA — risk-based supervision and detection in crypto-asset markets.
- IOSCO — Policy Recommendations for Crypto and Digital Asset Markets — Recommendation 8 addresses fraud and market abuse while emphasising effective surveillance and enforcement.
This page explains an analytical framework, not the legal status of a specific event. That assessment belongs to the competent authority under the applicable law and evidence.