What are the trading hours and can I place orders outside trading hours?

The trading hours for securities listed on the Hong Kong Stock Exchange (SEHK) are as follows*:

Pre-opening Session (POS):

Continuous Trading Session:

Closing Auction Session (CAS):

Trading is closed on Saturdays, Sundays and all Hong Kong public holidays.

* Subject to the trading arrangements approved by the SEHK or typhoon trading suspension arrangements.

You can place new orders, amend an order or cancel an order during the following service hours:

Order Type	Instruction	Service Hours (Normal Day Trading)	Service Hours (Half-Day Trading)
At-auction Limit Order	Place Order	24 Hours (except 9:22 a.m. - 4:00 p.m.)	24 Hours (except 9:22 a.m. - 12:00 p.m.)
	Amend order	24 Hours (except 9:15 a.m. - 9:30 a.m.)	24 Hours (except 9:15 a.m. - 9:30 a.m.)
	Cancel order	24 Hours (except 9:15 a.m. - 9:30 a.m.)	24 Hours (except 9:15 a.m. - 9:30 a.m.)
Enhanced Limit Order / Stop Loss Order	Place Order	24 Hours (except 4:00 p.m. – 4:10 p.m.)	24 Hours (except 12:00 p.m. – 12:10 p.m.)
	Amend order (for Enhanced Limit Order only)
	Cancel order
Market Order	Place Order	9:30 a.m. - 12:00 p.m. & 1:00 p.m. - 4:00 p.m. (morning session & afternoon session)	9:30 a.m. - 12:00 p.m.

Any unfilled At-auction Limit Order with an input price not deviating 9 or more times from the prevailing nominal price will be converted to a Limit Order at the input price and will be carried forward to the next Continuous Trading Session.
Enhanced Limit Orders and Stop Loss Orders submitted before 9:30 a.m. or between 12:00 p.m. and 1:00 p.m. will be handled after the Continuous Trading Session opens. For Enhanced Limit Order amendments, our system will process your instruction on a first come, first served basis on the same order.
The "Good-till-date" function is available for "At-auction Limit Order", "Enhanced Limit Order" and "Stop Loss Order" only.
During POS, order amendment or cancellation for At-auction Limit Order will be only accepted from 9:00 a.m. – 9:15 a.m. in the Normal Day Trading and the Half-Day Trading.
9:20 a.m. – 9:22 a.m. in the Normal Day Trading and the Half-Day Trading is the Random Matching Period, the order matching will take place randomly within two minutes.
During CAS, order amendment or cancellation for At-auction Limit Order will be only accepted from 4:01 p.m. – 4:06 p.m. in the Normal Day Trading and 12:01 p.m. – 12:06 p.m. in the Half-Day Trading.
4:08 p.m. – 4:10 p.m. in the Normal Day Trading and 12:08 p.m. – 12:10 p.m. in the Half-Day Trading is the Random Closing Period, the market closes randomly within two minutes.

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