Market abuse
circumstances where financial market investors have been unreasonably disadvantaged by insider dealing or market manipulation

In economics and finance, market abuse may arise in circumstances in which investors in a financial market have been unreasonably disadvantaged, directly or indirectly, by others who:
have used information which is not publicly available (insider dealing)
have distorted the price-setting mechanism of financial instruments
have disseminated false or misleading information (market manipulation)
Market abuse is split into two different aspects (under EU definitions):
Insider dealing: where a person who has information not available to other investors (for example, a director with knowledge of a takeover bid) makes use of that information for personal gain
Market manipulation: where a person knowingly gives out false or misleading information (for instance, about a company's financial circumstances) in order to influence the price of a share for personal gain
In 2013/2014, the EU updated its legislation on market abuse, and harmonised criminal sanctions. In the 2015 Danish European Union opt-out referendum, the Danish population rejected adoption of the 2014 market abuse directive (2014/57/EU) and much other legislation.
In the UK, the market abuse directive (MAD) was implemented in 2003 to reduce market abuse. It applied to any financial instrument admitted to trading on a regulated market or in respect of which a request for admission to trading had been made. MAD was subsequently replaced by the Market Abuse Regulation (MAR) in 2016.
See also
Anti-competitive practices
Insider trading
Financial Services and Markets Act 2000
EU law
ISO 37001 Anti-bribery management systems
Group of States Against Corruption
International Anti-Corruption Academy
United Nations Convention against Corruption
OECD Anti-Bribery Convention
References
Further reading
Avgouleas, Emilios E (2005). The mechanics and regulation of market abuse: a legal and economic analysis. Oxford University Press. ISBN 978-019924452-2.
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