KRX Equity Market
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KRX Equity Market
The trading hours for all sessions remain the same as the old system. Odd-lot orders can now also trade during the periodic matching sessions (9:00–9:15 on HOSE and 14:30–14:45 on HOSE & HNX).
According to the new KRX system rules, the MP order on HOSE is replaced by the MTL order, which works as follows:
- When an MTL order is entered, it matches fully against resting orders; any unfilled portion is converted into a limit order (LO) at a price equal to:
- Buy order: the last matched price + 1 price tick
- Sell order: the last matched price − 1 price tick
According to the new KRX rules, odd-lot trades are allowed in the opening and closing periodic matching sessions, but odd-lot orders may only be submitted as limit orders (LO).
According to the new regulations of the KRX trading system, customers can amend orders on all three stock exchanges: HOSE, HNX, and UPCOM. However, within a single amendment, customers are allowed to modify either the price OR the quantity of the order, but NOT both at the same time:
- Changing the price or increasing the quantity resets the order’s time priority.
- Reducing the quantity does not affect the order’s time priority.
In periodic matching sessions, the price board shows only the remaining buy/sell volume at the best remaining bid/ask levels, NOT the tentative matched volume per stock symbol. ATO/ATC orders are displayed as follows:
- ATO/ATC buy: best limit-order bid + 1 tick
- ATO/ATC sell: best limit-order ask − 1 tick
- If there are no limit orders on one side, the ATO/ATC price defaults to the tentative match price.
According to KRX rules, ATO/ATC orders do not take precedence over “ceiling-price” buy or “floor-price” sell orders. If an ATO/ATC order arrives after a “ceiling- price”buy/”floor -price” sell order, the ceiling/floor order is matched first.
Restricted-stock symbols on HOSE exchange are traded via multiple PCA (Periodic Call Auction) sessions, with each PCA session lasting 15 minutes. Customers may not cancel or modify orders during the last 5 minutes of each PCA session.
Apart from the trading-rule changes already communicated, SSI has not received any guidance or regulations on new products. We will notify you once new products are approved and rolled out.
The foreign-room balance updates immediately when a buy order enters the system, and adjusts up/down when that order is modified or canceled:
- Quantity reduced: room balance increases by the canceled volume
- Quantity increased: room balance decreases by the added volume
- Order canceled: room balance increases by the canceled volume