In order to ensure fair and efficient trading, SET uses special supervisory signs to regulate trading and inform investors of special situations and conditions that may affect the securities of a listed company.
Trading in a security is halted for a maximum period of one trading session.* Trading halts may be implemented because of:
Critical changes or major events concerning a listed company which have occurred during trading hours. The firm involved must immediately clarify the situation with SET.
Trading conditions (e.g., price fluctuations) which indicate insider trading, i.e. some investors may have received important news or information about a listed company before it was formally disseminated to the public.
A request of the issuer in order to allow for clarification of a major development or for a news announcement to be made during trading hours.
Major events which may critically affect the SET CONNECT trading system.
*Remarks: The Halt Sign may be removed at any time during the trading session if deemed appropriate by SET and/or following clarification or resolution of the situation.
Trading in a security is being suspended for more than one trading session. Trading suspensions may be enforced because of:
Replacement of the NP sign with the SP sign, following the failure of the issuer to adhere to SET disclosure regulations.
Failure of the issuer to follow regulations or to provide adequate explanation of share price changes without a legitimate reason.
Failure of the issuer to submit required financial statements within the period specified by SET.
The securities of the listed company are under delisting consideration, or the company has yet to ameliorate noted deficiencies within the period specified by SET.
The listed securities are due for redemption, conversion, or exercise of rights.
There is any other event which may seriously affect the trading of listed securities.
C sign is a sign which represents the listed companies being in the events that may affect the companies’ financial position and business operation.
SET is awaiting the disclosure of additional information from the issuer, or the information which has been received is incomplete or unclear.
Sufficient disclosure of the additional information, as requested by SET, has been made by the issuer.
The securities of a listed company face possible delisting, or are temporarily allowed to trade.
A listed company’s shares are in the process of being purchased for delivery to exercise an overallotment option.