Rules and Regulations

Trading

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SET has trading procedures and systems in place to ensure safe, secure, and reliable trading. 
Trading
Regulation
Trading

Trading regulations are intended to be clear, transparent, and easily accessible to foster a correct understanding of trading among members, investors, and other market participants.

Trading system
Regulation
Regulation Request for connection with the trading system

The regulations, conditions, and procedures governing a request for permission to connect to the SET's trading system focus on the readiness of the member's order delivery system, both in terms of trading supervision and testing, to ensure proper operation in accordance with the SET's standards and requirements.

Regulation
Regulation Direct Market Access
Regulation
Regulation Algorithmic Trading

Algorithmic trading uses computerized trading software to generate and record trading orders automatically, and it meets the SET minimum risk management requirement. Users must strictly adhere to applicable regulations to avoid inappropriate transactions or potential legal violations.

Individuals involved in trading
The regulations establish the qualifications and duties of authorized traders and market makers, as well as the registration process, changes, cancellation, or revocation of registration, and the disciplinary process and penalties.

Regulations governing abnormalities in securities trading
When there is an abnormal change in prices or trading that is not consistent with the normal market condition, SET will implement the regulations to warn investors of potential risks, mitigate those risks, and protect the overall trading system.

False Market
Regulation
Regulation Placement of trading orders that deviate from normal market conditions (False market )

Member companies and investors must not place trading orders that cause trading to be inconsistent with the normal market conditions (False Market), as this may be considered a legal offense.

Regulation
Regulations Examples of improper placement of securities trading orders

Member companies and investors are not permitted to place improper trading orders that disrupt the trading system. SET has put examples of inappropriate securities trading orders in place as a reference and guideline for member companies and investors.

Regulation
Regulation ATO/ATC trading order

The regulation is intended to make member companies aware of the potential price risks associated with the execution of ATO/ATC orders, particularly on non-liquidity securities, first-day traded securities, or securities with no ceiling or floor price limits.

Regulation
Regulation Risk management guideline for ALGO trading order

Member companies seeking permission to use Algorithmic Trading (ALGO) must have risk management measures in place to avoid a false market.