General ASX market hours are between 10am and 4pm. See below full equity market phases (Sydney times)
7am – 10am
You can can enter, amend or cancel any orders during this time. They will be queued in a price-time priority fashion until the market opens.
Opening takes place at 10:00 am Sydney time and lasts for about 10 minutes. The Opening Price is calculated during this phase based on overlapping bids and offers. The price is dynamic and can change during and up to below times for the stock. Securities open in five groups, according to the starting letter of their ASX code:
Group 1 10:00:00 am +/- 15 secs A-B, e.g. ANZ, BHP
Group 2 10:02:15 am +/- 15 secs C-F, e.g. CPU, FXJ
Group 3 10:04:30 am +/- 15 secs G-M, e.g. GPT
Group 4 10:06:45 am +/- 15 secs N-R, e.g. QAN
Group 5 10:09:00 am +/- 15 secs S-Z, e.g. TLS The time is randomly generated by ASX Trade and occurs up to 15 seconds on either side of the times given above, e.g. group 1 may open at any time between 9:59:45 am and 10:00:15 am.
10am – 4pm
Normal Trading takes place from 10:00 am to 4:00 pm, Sydney time. The vast majority of trades take place during Normal Trading.
4pm – 4:10pm
During this time the market is placed in Pre-CSPA. Trading stops and brokers enter, change and cancel orders in preparation for the market closing. This stage is similar to the Pre- Open stage.
Closing Single Price Auction
4:10pm – 4:12pm
The Closing Price is calculated during this phase, determined by overlapping bids and offers. This is the same as the Opening phase whereby the closing price is dynamic and can change right up until the random closing time. *Random + 60 secs
4:12pm – 6:50pm
During this phase you may cancel and amend orders (if they don’t improve your position. New orders cannot be entered.
6:50pm – 6:59pm
Orders that are expired orders, too far from market etc. will be centrally inactivated/purged.
6:59pm – 7pm
Administration system adjustment session state.
7pm – 9:30pm
No Trading Messages may be entered or amended in ASX Trade and no matching or Auctions take place.
*Random +/- 15 secs