General ASX market hours are between 10:00 am and 4:00 pm. Below is a summary of the key times and activities during a trading day.
Pre-open - 7:00 am – 10:00 am
You can enter, amend or cancel any orders during this time. They will be queued in order of price-time priority until the market opens.
Market Open - 10:00 am*
The market opens at 10:00 am AEST 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.
Closing Single Price Auction 4:10 pm – 4:12 pm
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.
The ASX typically closes for national public holidays. Visit the ASX calendars page for more information.