ASX sincerely apologises and deeply regrets the disruption to the market caused by the outage of the ASX Trade system today.

The market will remain closed today, Monday 16 November. It will reopen at the normal time (10am) tomorrow, Tuesday 17 November.

ASX and its technology provider Nasdaq have identified the root cause and a resolution path to fix it. A software issue limited to the trading of multiple securities in a single order (combination trading) created inaccurate market data.

The issue will be resolved overnight with the market re-opening at 10am tomorrow.

ASX sincerely apologises and deeply regrets the disruption to the market caused by the outage of the ASX Trade system today. It will reopen tomorrow at the normal time (10am). See the full media statement: https://t.co/o9zmnZBtSv

— ASX ? The heart of Australia's financial markets (@ASX) November 16, 2020

Today was the go-live for the refreshed ASX Trade system, which is the trading platform for ASX’s equity market.

ASX, our technology provider Nasdaq, customers and independent specialist third parties conducted extensive testing for over a year, including four dress rehearsals, in preparation for today’s go-live.

The refresh is the latest generation of a Nasdaq-developed trading system used around the world.

Dominic Stevens, ASX Managing Director and CEO, said: “ASX is very disappointed with today’s outage and sorry for the disruption caused to investors, customers and other market users.

“The outage falls short of the high standards we set ourselves and the standards others expect of us.

“Notwithstanding the extensive testing and rehearsals, and the involvement of our technology provider, ASX accepts responsibility. The obligation to get this right and provide a reliable and resilient trading system for the market rests with us.

“While I am disappointed with today’s outage, we are determined to continue our program of contemporising ASX’s technology stack from top to bottom. This initiative is critical to ASX building an exchange for the future and ensuring we best serve the needs of our customers and the Australian market”, Mr Stevens said.

Source: ASX

For those monitoring operational resilience, we've had quite a few notable incidents this year in market structure land. #fintech #regtech #cybersecurity pic.twitter.com/ju3ZeTyuq9

— Virginie O'Shea (@virginieoshea) November 16, 2020

ASIC Statement on ASX Outage 

The ASX cash equity market trading platform did not reopen for trading today Monday, 16 November 2020, after an outage occurred during the opening auction. ASIC remains in regular communication with ASX, market participants, and members of the Australian Council of Financial Regulators. We are focussed on ensuring that ASX reopens in an orderly manner on Tuesday 17 November, and that market integrity is not compromised. ASIC will also monitor for any impacts resulting from the failure of ASX Trade to open for most of the day.

ASIC views outages of this nature with significant concern. It has had a significant impact on the market, including market participants and investors. The ASX is one of the world’s most active and visible public markets and forms a critical part of Australia’s national economic infrastructure.  Well-functioning financial market infrastructure is critical to the integrity and reputation of the Australian equity market and the trust and confidence investors have in it. As the primary equities market in Australia, ASX performs a vital role.

Source: ASIC