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SET Seeks Public Consultation On Revised Board Lot Requirements And Floor Price Adjustment For New Listings Until June 13, 2025

Date 14/05/2025

As part of its regulatory framework enhancement, The Stock Exchange of Thailand (SET) is reviewing the board lot adjustment and the ceiling and floor price adjustment for new listings to align trading rules with current market conditions, investor behaviors, and practices adopted by international stock exchanges as well as to improve accessibility to investment among investors. Therefore, SET is conducting a market consultation on “Regulatory Enhancements for Securities Trading on the SET and mai” to invite public feedback on the following proposed amendments:

  1. Board lot adjustment: In response to the trading behaviors of retail investors in general whose ticket sizes average below THB 5,000, the following adjustments are proposed to offer broader investment opportunities across diverse price levels.

    Current

    Proposed

    Securities

    ·  One board lot equals 100 shares

    ·  For securities with a closing price of THB 500 or higher for six consecutive months,
    one board lot equals 50 shares

    Depositary Receipts (DRs)

    ·  One board lot equals 1 share

    Securities

    ·  Unchanged

    ·  For securities with a closing price of THB 50 or higher for six consecutive months,
    one board lot equals 10 shares

    Depositary Receipts (DRs)

    ·  Unchanged

  2. Ceiling and floor limit adjustment for new listings on first trading day: This is to mitigate the downward price volatility on the trading debut day and the risk exposure of investors in line with the practices of international stock exchanges which generally apply narrower floor limits for the first trading day. The proposed amendments are as outlined below:

Day

Securities Type

Current

Proposed

First trading day

General securities and securities held by foreign nationals (-F)

Ceiling: Three times the IPO price

Floor: No lower than THB 0.01

Ceiling: Unchanged

 

Floor: 0.5 times (50%) the IPO price

Daily

General securities

Ceiling & Floor: 30%*

Ceiling & Floor: Unchanged

Securities held by foreign nationals (-F)

Ceiling & Floor: 60%*

Ceiling & Floor: Unchanged

Remark: *Based on the closing price of the securities on the preceding day

The public consultation aims to obtain valuable opinions from stakeholders on the proposed amendments to the criteria as mentioned above. The consultation document and details are available on the SET website at https://www.set.or.th/en/rules-regulations/market-consultation  under “Regulatory Enhancements for Securities Trading on the SET and mai.” This consultation will remain open until June 13, 2025.