SET to implement Auction Matching, Dynamic Price Band, and Minimum Resting Time, effective September 2, 2024

1. Auction Matching Method will be required for all investors trading securities that SET has designated as the trading surveillance measures at Level 2 and above, in addition to the existing measures for securities with abnormal trading conditions.
2. Dynamic Price Band for individual securities of ?10 percent from the latest execution price will be imposed. This measure will complement the existing daily ceiling and floor price limits of ?30 percent from the previous day's closing price, providing an additional mechanism to mitigate securities price fluctuation.
3. Minimum Resting Time before an order can be amended or cancelled is set at 250 milliseconds. This measure aims to curb excessively frequent order updates and cancellations that could potentially mislead the market about high demand for particular securities.

For more detailed information, please visit SET's website: www.set.or.th under the menu "Rules & Regulations" section, then "Rules & Circular Letters".

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