ASX's Botched CHESS Replacement

The Australian Stock Exchange's failed CHESS replacement program serves as a cautionary tale of program failure that led to significant reputational damage, value destruction, and a fundamental re-evaluation of how major technology programs should be governed and delivered.

The Program

CHESS (Clearing House Electronic Subregister System) is the ASX's core clearing and settlement platform — critical financial market infrastructure that underpins Australian capital markets. Launched in 2017, the replacement program aimed to modernise CHESS using distributed ledger technology (DLT), positioning Australia as a global leader in financial market infrastructure.

What Went Wrong

The program, developed in partnership with blockchain technology company DTCC subsidiary Digital Asset, accumulated years of delays and ultimately cost hundreds of millions of dollars before being abandoned in November 2022.

Multiple contributing factors emerged. The decision to adopt unproven distributed ledger technology for critical market infrastructure introduced a level of technical risk that was inadequately assessed. The technology, while conceptually promising, was not sufficiently mature for a program of this scale and criticality.

Industry consultation, while conducted, did not adequately surface the concerns of market participants about the program's direction. Governance structures did not create sufficient space for honest challenge of the technical approach.

The replacement program also suffered from inadequate independent oversight and assurance. External reviews that might have identified emerging risks earlier were not sufficiently empowered or independent.

The Cost

The financial cost was significant. But the reputational damage — to the ASX as a market operator and regulator, and to Australia's standing as a sophisticated financial market — was arguably more consequential.

Key Lessons

The CHESS saga reinforces several critical delivery principles. Technology selection for critical programs must be driven by proven capability, not innovation ambition. Independent assurance must be genuine — empowered to challenge and escalate, not merely to validate. And governance must create conditions for honest, early escalation of emerging problems.

These are precisely the principles that underpin Retexo's delivery approach. Our 3D methodology — Determine, Devise, Deliver — builds in the rigour required to make sound technology and delivery decisions, and the governance frameworks needed to stay on course.