On 13 May 2026, Thai SET proposed prescribed trading supervision measures.
- Thai SET consulted on current trading supervision measures to enhance investor confidence, covering measures to be added, revised, and cancelled.
- Follows Thai SEC October 2025 launched plan to revitalize capital market.
New Measures
- Proposes reducing tick sizes for certain price bands to improve trading liquidity.
- It also proposes an extra charge for high-order to trade ratio (OTR) trading accounts that use high levels of trading-system capacity.
Revised Measures
- To reduce selling pressure during volatile periods while limiting liquidity impacts, Thai SET proposes changing the short selling price rule to zero-plus tick, so short sale orders must be priced at or above the last trading price.
- It also proposes limiting short selling to large-cap and highly liquid securities, and revising the definition and registration approach for high-frequency trading (HFT) investors.
Cancelled Measures
- To reduce trading obstacles and allow securities trading to proceed freely and efficiently, Thai SET proposes cancelling the dynamic price band (DPB) measure.
- To increase operational system efficiency for member companies and help reduce obstacles to securities trading, it proposes cancelling the minimum resting time (MRT) measure.
Effectiveness
- The consultation closes on 29 May 2026.
