The Reserve Bank of Australia also warned ASX’s clearing and settlement units still fall short of key regulatory standards and pledged to monitor progress closely.
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The central bank, which has oversight of the clearing and settlement systems, said in a statement it would consider further regulatory responses if ASX did not improve.
“ASX is not currently meeting the regulators’ expectations for an operator of critical national infrastructure,” said RBA Assistant Governor (Financial System) Brad Jones.
“Resilient and secure clearing and settlement facilities are crucial to the stability of the Australian financial system.”
The RBA said the ASX needed to improve its risk transformation plan and conduct a review of its business continuity and contingency arrangements in its clearing and settlement division.
The ASX came under fire in December after deferring a day’s worth of trading settlements following a breakdown in its Clearing House Electronic Subregister System (CHESS).
“We are acutely aware ASX must accelerate our progress to rebuild trust with our regulators, particularly following the disappointing incidents of the past year,” ASX Chief Executive Helen Lofthouse said in a statement.
Lofthouse added ASX is focused on contingency arrangements for CHESS and has completed some code fixes and memory increases to improve its resiliency.
The aging all-in-one CHESS system usually settles a trade two business days after a buyer and seller agree to the trade by arranging for money transfers.
Along with settlements, CHESS electronically registers the ownership of shares on its subregister.
Reporting by Scott Murdoch in Sydney, additional reporting Roshan Thomas in Bengaluru; Editing by Harikrishnan Nair and Christian Schmollinger