SET News 68/2024
                                                      June 21, 2024

SET amends short selling and program trading regulations, commencing on July 1, 
2024

BANGKOK, June 21, 2024 - The Stock Exchange of Thailand (SET) announces 
additional regulatory amendments on short selling and program trading to
reinforce market supervision and to boost investor confidence. The revised
regulations comprise the qualifications of securities eligible for short
selling, the pricing mechanism for short selling transactions, the registration
of high frequency trading (HFT) investors, and information disclosure regarding
investors involved in inappropriate trading practices. The supervisory measures
will be implemented on July 1, 2024.
   
Regulatory measures on short selling
1) The qualifications for the non-SET100 securities eligible for short selling 
have been amended to require larger market-cap shares with more trading
liquidity. Under the new regulation, the minimum three-month average market
capitalization requirement for the non-SET100 securities  will be raised to THB
7.50 billion (approx. USD 204.03 million). Additionally, 12-month average
monthly turnover of at least 2 percent will be introduced while the minimum free
float of 20 percent of paid-up capital will remain unchanged. The list of
shares eligible for short selling under the new regulation will be published on
the SET website.
  
2) The uptick rule, which requires short selling at prices higher than the last 
executed price, will replace the current zero-plus tick rule, which allows short
 selling at prices equal to or higher than the last executed price.

Regulatory measures on program trading
3) HFT investors will be required to register before sending HFT* orders to 
strengthen the oversight of this group of investors.

Disclosure of investors who conduct inappropriate trading practices
4) SET will disclose information of investors who conduct inappropriate trading 
practices to all SET broker member companies, enabling more effective
supervision.

The aforementioned regulatory measures will be implemented on July 1, 2024.

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

*HFT definition: Algorithmic Trading creates and sends trading orders at SET 
Co-location facility.

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