Skip to main content
Regulatory Council
Dark green background, "Weak Application Security Can Cost You Millions," 3 slanted images of fingers pointing to digital locks, and a "Learn the Basics" button
Category: Regulatory Obligations Management

Market Abuse Regulation

Also known as: MAR, EU MAR, Market Abuse Regime
Simply put

The Market Abuse Regulation is a set of European Union rules designed to keep financial markets fair and honest by preventing behaviour that unfairly disadvantages other market participants. Its broad aims are to protect investors and strengthen confidence in the integrity of securities markets. It also supports the detection, sanctioning, and deterrence of abusive conduct.

Formal definition

The Market Abuse Regulation (MAR) is an EU regulatory framework establishing common rules intended to prevent, detect, and address market abuse in order to safeguard the integrity of EU financial markets and enhance investor protection. Market abuse in this context refers broadly to unlawful conduct that seeks to disadvantage other participants in a qualifying market. MAR forms part of a wider regime that strengthens the legal basis for detecting, sanctioning, and deterring such conduct. The evidence provided describes MAR's purpose and general scope but does not specify particular articles, categories of prohibited conduct, effective dates, or penalty provisions; practitioners should verify specific obligations, definitions, and their applicability against the primary regulatory text and any implementing measures, noting that scope and enforcement may vary by jurisdiction and instrument.

Why it matters

Fair and orderly financial markets depend on participants being able to trust that prices reflect genuine supply and demand rather than manipulation or the exploitation of privileged information. The Market Abuse Regulation (MAR) addresses this by establishing a common EU regulatory framework aimed at preventing, detecting, and addressing market abuse. Its stated purpose is to increase investor protection and enhance market integrity, so that securities markets remain a credible venue for raising capital and allocating risk. Where confidence in market fairness erodes, participants may withdraw or demand higher risk premiums, which can raise the cost of capital across the wider economy.

For compliance functions, MAR matters because it forms part of a wider regime intended to strengthen the legal basis for detecting, sanctioning, and deterring abusive conduct. This shifts market integrity from an aspiration into a set of enforceable expectations, with regulators positioned to identify and act against unlawful behaviour that seeks to disadvantage other participants in a qualifying market. Organizations operating in scope typically need to demonstrate that they have arrangements to identify and manage the conduct risks MAR is concerned with.

The evidence provided describes MAR's purpose and general scope but does not specify particular categories of prohibited conduct, effective dates, thresholds, or penalty provisions. Because applicability and enforcement can vary by jurisdiction, instrument, and the nature of an organization's activities, practitioners should treat MAR as a framework whose specific obligations must be verified against the primary regulatory text and any implementing measures rather than assumed from summary descriptions.

Who it's relevant to

Compliance officers
Compliance teams are typically responsible for translating MAR's objectives into practical arrangements for preventing and detecting conduct that could disadvantage other market participants. Because the framework's specific obligations are not detailed in this summary, compliance functions should map their in-scope activities against the primary regulatory text and any implementing measures rather than relying on general descriptions of MAR's purpose.
Risk managers
Market abuse represents a conduct and regulatory risk that can affect an organization's objectives, including reputational and enforcement exposure. Risk managers may consider MAR-related conduct when identifying and assessing the risks associated with participation in qualifying markets, recognizing that no control eliminates such risk entirely and that treatment measures should be calibrated to the organization's activities.
General counsel and legal advisers
Legal functions are often called on to interpret whether particular activities or instruments fall within MAR's scope and how obligations apply in a given jurisdiction. Given that scope, definitions, and enforcement may vary and that this summary does not specify articles or penalty provisions, matters of legal interpretation generally require review of the primary regulatory text and professional advice.
Internal auditors
Internal audit may be asked to provide assurance over the design and operating effectiveness of arrangements intended to address market abuse. Auditors should base testing on the specific obligations applicable to the organization, verified against the primary source, rather than on generalized statements of MAR's aims.
Governance bodies and senior management
Boards and senior management set the tone and oversight structures within which market conduct risk is managed. MAR's emphasis on market integrity and investor protection makes the detection and deterrence of abusive conduct a matter of governance interest, though the specific accountabilities that apply depend on the organization's role in qualifying markets and the relevant jurisdiction.

Inside MAR

Insider Dealing Prohibition
A core component addressing the use of inside information, typically non-public, price-sensitive information relating to financial instruments, to deal, or attempt to deal, in those instruments or related products. The prohibition generally extends to recommending or inducing others to deal on the basis of such information.
Unlawful Disclosure of Inside Information
A component covering the improper communication of inside information to another person, other than in the normal exercise of employment, profession, or duties. This is distinct from dealing itself and can arise even where no transaction occurs.
Market Manipulation
A component addressing conduct that gives, or is likely to give, false or misleading signals as to supply, demand, or price of financial instruments, or that secures an abnormal or artificial price level. It may also encompass dissemination of false or misleading information and manipulation involving benchmarks in some formulations.
Disclosure and Transparency Obligations
Requirements often associated with the regime for issuers to disclose inside information to the public in a timely manner, subject to permitted delays under defined conditions, and to maintain records supporting such decisions.
Insider Lists and Managers' Transactions
Administrative components under which issuers or persons acting on their behalf maintain lists of persons with access to inside information, and under which persons discharging managerial responsibilities and closely associated persons notify certain transactions.
Suspicious Transaction and Order Reporting
A component typically requiring firms that arrange or execute transactions to establish arrangements to detect and report suspicious transactions and orders to the relevant competent authority.

Common questions

Answers to the questions practitioners most commonly ask about MAR.

Does the Market Abuse Regulation only apply to firms and issuers whose securities are listed on a main regulated market?
This is a common misconception. The regime's scope is typically broader than main regulated markets alone. In many descriptions of the framework, it also extends to financial instruments traded on multilateral trading facilities (MTFs), organised trading facilities (OTFs), and, in certain cases, to instruments whose price or value depends on or affects an in-scope instrument. Because scope provisions are detailed and can turn on the specific trading venue and instrument type, the precise applicability to any given entity should be confirmed against the primary regulatory text and, where necessary, with qualified legal advice for the relevant jurisdiction.
Is market abuse the same thing as insider dealing?
Not quite, insider dealing is one component, not the whole. Market abuse is typically an umbrella concept that spans several distinct behaviours, which commonly include insider dealing, unlawful disclosure of inside information, and market manipulation. Treating the terms as synonymous risks overlooking obligations related to, for example, the improper disclosure of inside information or manipulative trading and dissemination practices. The exact behaviours captured and their definitions should be verified against the applicable regulation, since scope and terminology can vary across editions and jurisdictions.
How does a firm typically operationalise the identification and handling of inside information?
Firms often approach this through a combination of governance structures and controls rather than a single measure. Common practices include maintaining procedures to identify when information may qualify as inside information, restricting its dissemination, keeping records such as insider lists, and defining decision rights for disclosure timing. These practices sit across the governance and compliance pillars. Because obligations around the drawing up of insider lists and the timing of disclosure are jurisdiction- and framework-specific, firms should map their procedures to the requirements in the applicable regulatory text rather than to a generic template.
What role do controls play in managing market abuse risk, and can they eliminate it?
Controls are measures intended to modify market abuse risk, they reduce likelihood or impact but do not eliminate the underlying risk. Typical control activities may include trade surveillance, restrictions and monitoring around personal account dealing, information barriers, training, and escalation procedures. It is important to distinguish the risk (the potential for abusive conduct or breaches and their effect on objectives) from these controls. Even a well-designed control environment leaves residual risk, and no control set can guarantee compliance or prevent all misconduct; ongoing monitoring and periodic reassessment are generally regarded as necessary.
How should suspicious activity relating to potential market abuse be escalated?
Many frameworks contemplate mechanisms for detecting and reporting suspicious orders or transactions to the relevant competent authority, often supported by internal escalation pathways from front-line staff to a compliance or surveillance function. In practice, firms commonly define who assesses alerts, the threshold for reporting, and the documentation retained to evidence decisions. The specific reporting obligations, timing expectations, and the authority to which reports are directed vary by jurisdiction and should be confirmed against the primary source, as these are matters where legal interpretation may be required.
Who within an organisation typically owns responsibility for market abuse compliance?
Responsibility is usually shared across multiple lines rather than resting with a single role. Business units engaging in trading or handling inside information often act as first-line owners of the associated risk, while a compliance or surveillance function commonly provides oversight, monitoring, and challenge, and senior management and the board typically hold accountability for the overall control environment. This allocation reflects governance decision rights and compliance oversight together. The exact roles and their formal accountabilities depend on an organisation's size, structure, and sector, and should be defined in internal policy consistent with applicable regulatory expectations.

Common misconceptions

Market abuse rules only apply to trading that actually takes place on a regulated stock exchange.
Scope in many formulations extends beyond a single trading venue and can capture conduct relating to instruments traded on various venues, as well as attempts, orders, and related or derivative instruments. Exact scope depends on the applicable legal text and jurisdiction, which should be verified against the primary source and, where necessary, legal advice.
Market abuse provisions are purely a compliance matter with no bearing on governance.
While the prohibitions are compliance obligations, effective adherence typically depends on governance structures, such as clear decision rights over disclosure, oversight of insider lists, and accountability for surveillance, so the topic legitimately spans the compliance and governance pillars.
If no profit is made or no trade is executed, there can be no breach.
In many formulations, attempts to engage in insider dealing or manipulation, unlawful disclosure of inside information, and the placing of orders can fall within scope regardless of whether a completed transaction or a profit results. The precise triggers depend on the applicable legal text.

Best practices

Maintain accurate, up-to-date insider lists and clearly define who is granted access to inside information, along with the basis for that access.
Establish and periodically test arrangements to detect, escalate, and report suspicious transactions and orders to the relevant competent authority.
Document decisions to delay disclosure of inside information, including the conditions relied upon and the reasoning, so the basis is defensible on review.
Provide targeted training to staff and managers on the distinctions between insider dealing, unlawful disclosure, and market manipulation, including that attempts and orders may be in scope.
Assign clear governance ownership over surveillance, disclosure decisions, and insider-list maintenance, avoiding gaps in accountability between functions.
Verify the specific obligations, thresholds, and reporting mechanics against the primary legal text applicable to your jurisdiction and instruments, and obtain legal advice on contested or borderline cases.
Application Security Isn’t Optional Anymore.