Australian equities trading hours

The ASX recently updated its trading session times, specifically around the market open and close phases. See the new hours below.

ASX Exchange

Equity Market Phases	Time Period (Sydney Time)	Market to Limit Orders	Limit Orders	Order Amendments	Order Cancellations	Details
Close	2:25AM - 7:00AM	Not permitted	Queued outside of Market	Queued outside of Market	Queued outside of Market
Pre-Open	7:00AM - 9:59:00AM*	Not permitted	Queued in Market	Queued in Market	Queued in Market	ASX Trade does not execute orders. Orders are queued according to price-time priority and will not trade until the market opens.
(OSPA) Opening Single Price Auction	09:59:00AM - 09:59:45PM*	Not permitted	Queued outside of Market	Queued outside of Market	Sent to Market	The OSPA is a levelling/buffering period during which ASX Trade calculates opening prices. * The OSPA occurs during a 15 second randomised window beginning at 9:59:00, which will run for a minimum of 30 seconds. It will commence no later than 09:59:15. The earliest transition from OPSA to continuous trading (Open) will occur at 09:59:45.
Open/Normal Trading	09:59:45AM* – 4:00PM	Sent to Market (CSPA Price)	Sent to Market	Sent to Market	Sent to Market	Opening takes place at 09:59:45 (randomised 15 seconds)
Pre CSPA	4:00PM – 4:10PM	Not permitted	Queued in Market	Queued in Market	Sent to Market	New orders, amendments and cancellations are permitted during this phase. ASX Trade does not execute orders. Preparation for the Closing Single Price Auction (CSPA).
Closing Single Price Auction (CSPA)	4:10PM⁺ - 4:11PM	Not permitted	Queued outside of Market	Queued outside of Market	Sent to Market	ASX Trade calculates closing prices during this phase. The Closing Single Price Auction takes place between 4:10⁺ pm (randomised 30sec) to 4:11 pm. No new orders are permitted after CSPA.
Post Close	16:11PM – 4:21:30PM	Sent to Market (CSPA Price)	Sent to Market (CSPA Price)	Sent to Market (CSPA Price)	Sent to Market (CSPA Price)	New Market to Limit orders are sent to market. New Limit orders at CSPA price, and amended existing orders at the CSPA price, are sent to market. New orders away from CSPA price, and amended orders away from CSPA price, are queued outside of market.
Adjust	4:21:30PM - 4:42PM	Not permitted	Queued outside of Market	Sent to Market^#	Sent to Market	^#Passive order amendments are sent to market. ^#Aggressive order amendments are queued outside of market.
Adjust ON	4:42PM - 6:50PM	Not permitted	Queued outside of Market	Sent to Market^#	Sent to Market	^#Passive order amendments are sent to market. ^#Aggressive order amendments are queued outside of market.
Trading Halt	Ad hoc	Not permitted	Not permitted	Sent to Market^*	Sent to Market	^*Downward volume or passive price amends are sent to market. Cancellations are sent to market.
Purge Orders	6:50PM-6:59PM	Not permitted	Queued outside of market	Queued outside of market	Queued outside of market	Expired orders and orders that are too far from market etc. Will be centrally inactivated/purged.

For more information regarding the changes please click on the ASX videos below: