A request for a trading halt can be made by:
The market operator (Euronext Paris)
Once it has informed the issuer, the market operator may suspend trading in a security. It must also inform the AMF Chairman about the trading halt. This type of suspension is intended to prevent or halt disorderly market conditions.
The issuer (the company itself)
The issuer can also ask the market operator to halt trading in its securities pending publication of a news release to inform the public about an event that might materially affect the stock price, such as a corporate action or restructuring.
The Chairman of the AMF
The AMF Chairman may ask the market operator to halt trading under the powers assigned to the AMF, for example when a draft bid is filed or if the company is unable to provide proper disclosures to the public.
The decision to halt trading is always taken by Euronext Paris.
Trading halts are published in a Euronext Paris market notice that describes the origin of and reasons for the halt and the conditions in which trading may resume. Failing this, it stipulates that trading has been suspended until further notice. There is no maximum time limit for trading halts.
Except where otherwise provided, when trading in a security is suspended, unexecuted orders involving that security are eliminated. Anyone who has placed an order is therefore encouraged to check whether that order has been deleted from the order book following the trading halt.
April 2008