DRx Introduction

Underlying securities
DRx represents foreign security, which was purchased by the issuer and kept at custodian prior to listing, allowing Thai investors to own such securities. According to the SEC, underlying securities eligible for DRx issuance include common shares, ETFs, REITs, Infra Funds, and Infra Trusts that are listed and traded on foreign exchanges.

DRx trading
3.1 Trading method: DRx is traded similarly to common shares on the main board using automatic matching method (AOM), but only allows two types of trading orders:
(1) Market order: An order that matches the buy or sell of a stock at the best available price immediately and;
(2) Limit order: An order to buy or sell a stock at a specific price

What distinguishes DRx trading is that unmatched trading orders will remain in the system until canceled (Good-Till-Canceled), to accommodate investors. However, investors must constantly verify the outstanding orders whether it is still appropriate.

3.2 Order entry: Investors can state the price or volume in the trade order. Volume orders can start with a fraction of a unit, as little as 0.0001 unit, and price orders can include up to two decimal places

• Investors can cancel an unmatched order and replace it with a new one as needed
• SET may review and decide to reject any improper order that does not adhere to its requirements
• DRx trading orders can be submitted through Streaming App on iPhone, iPad, and Android devices

3.3 Trading account: Before trading, investors must notify their broker to open a DRx account—a prepaid add-on account to their trading account. Payment for DRx can be made through the QR Payment system.

3.4 Trading hours: To enable investors to trade concurrently with the foreign exchanges where the underlying securities are listed and make informed decisions based on the most recent information, the DRx trading hours are set as follows:

• ASIA Time Zone l 0700- 1700 hrs.: For DRx with underlying securities traded on stock exchanges in Asia
• US Time zone l 2000-0400 hrs. (T+1): For DRx with underlying securities traded on stock exchanges in North America  

• There is a 15 minutes pre-open period (unmatched orders can be canceled during this time)
• The Halt (H) sign will be displayed on securities that are not outside of trading hour

3.5 Price control: Unlike common stocks that the ceiling and floor price is capped at +/- 30% from the previous day's closing price, DRx uses a different mechanism of a price band as DRx moves in line with foreign underlying securities. A limit of no more than 10% of the most recent five-minute average price or a "Dynamic Price Band" will better reflect the value of the foreign underlying asset.

3.6 Fee:0.16% which includes the brokerage commission fee, 0.005% trading fee, 0.001% clearing fee, and 0.001% regulatory fee. The fee does not include the 7% VAT.