Help Center

Anytime, anywhere, attentive service

at-auction limit order
at-auction limit order
Hong Kong stock bidding limit order trading, like bidding order trading, is also divided into morning bidding and closing bidding. However, when entering the bidding limit order, investors need to specify the bidding price.
Morning bidding limit order
1.Ordering time available
Investors can place orders between 16:10 on trading days and 9:22 on the next trading day. Bid limit orders placed before 9:00 on trading days will be saved by Alpha's trading system and automatically submitted to the exchange after 09:00.
2. Regarding disk time
Random match will be completed between 9:20-9:22 before the market opens
3.Price limit for buying and selling orders
3.1 Enter the buying and selling order period, and the price limits for buying and selling orders are as follows:
Price ceiling: Last day's closing price+15%
Price limit: -15% of the previous day's closing price
There is no price limit when there is no daily closing price
Note: Quotations beyond this range will be directly rejected and invalidated
3.2 Non cancellable time periods and random matching time periods, the price restrictions for buying and selling orders are as follows:
3.2.1 Purchase price limit is
Price ceiling: The price ceiling for the second stage;
Price limit: -15% of the previous day's closing price;
3.2.2 Selling price limit is
Price ceiling: Last day's closing price+15%;
Lower price limit: the lower price limit for the second stage;
There is no price limit when there is no daily closing price.

3.2.3 Remarks:
The upper limit of the second stage price (buying): the higher of the lowest selling price and the highest buying price recorded at the end of the buying and selling period.
The lower limit of the second stage price (selling price): the lower of the lowest selling price and the highest buying price recorded at the end of the buying and selling period.
Orders that exceed the second stage price limit will not be executed during the pre opening period.

4. Explanation and Precautions
4.1 Bidding limit orders cannot be changed or cancelled after 9:15
4.2 Bidding limit orders are placed in order of priority based on price and time
4.3 Any unexecuted bidding limit order will be automatically converted into a limit order and automatically transferred to the normal trading period
4.4 Alpha currently does not support short selling during the morning auction stage. Please refer to the actual trading situation for accuracy
4.5 The pre opening period will only cover all equity securities (including depositary receipts, investment companies, preferred stocks, and bound securities), funds (including exchange traded funds and real estate investment trust funds), and leveraged and reverse products (collectively referred to as "pre opening period securities"). If non pre opening securities trading orders or non automated matching trades are entered during the pre opening period, the orders or trades will be rejected. Only after the start of the continuous trading period can trading orders for securities outside the pre opening period and non automatic matching orders be entered. For specific tradable products, please refer to the official instructions of the Hong Kong Stock Exchange.

Closing bid limit order
1. Ordering time available
16: 01-16:10 (16:08-16:10 is a random closing period, and if the market has already closed, orders cannot be placed)
2. Checking the disk time
16:08-16:10
3. Explanation and Precautions
3.1 After 16:06, all bidding limit orders cannot be changed or cancelled
3.2 The price of the bidding limit order shall not be higher than the bid price * 9, or lower than the bid price * 0.1
3.3 Bidding limit orders are placed in order of priority based on price and time
Limit orders that have not been executed during the afternoon trading session will be automatically transferred to the closing auction
3.5 Any unexecuted bidding limit orders will be automatically cancelled after a random market close



Pre - and Post Market Bidding - AP Function Guide