A common market organisation is a set of measures that enables the European Union to monitor and manage, either directly or indirectly (via producer organisations supported by operational programmes), the markets of agricultural products. The rules are laid down in the regulation on the single common market organisation.
The purpose of market management is to stabilise markets (in terms of quantity offered and purchased and the price at which transactions take place) and thus to ensure, on the one hand, that farmers do not suffer from excessively low prices and, on the other, that consumers have a secure supply of food at reasonable prices.
Until 2007, the European Union operated 21 common market organisations which together covered around 90% of the output of farms. With a view to make things simpler, the European Union has amalgamated these 21 common market organisations into a single set, known as the single common market organisation.