Replacing a 30-Year Legacy Post-Trade System Without Disruption

Case study

Asia-Pacific

Leading securities institution

Zero disruption

Thirty years of legacy, retired without a missed settlement.

Thirty years of legacy technology was consuming the IT budget, driving error rates, and quietly deciding which markets the firm could and could not enter. Millions of investors were being served through it daily. Incremental fixes had run out. The mandate was to replace the backbone without anyone outside the building noticing.

Client

A leading Asian securities institution serving millions of investors

Trigger

A 30-year-old platform limiting growth and consuming IT spend

Mandate

Modernise without disrupting the business; build for expansion

Approach

Controlled deployment, no big bang, continuous validation

The outcome

Lower cost. Faster settlement. New markets open.

40%

Lower IT and maintenance cost

Capital freed for growth instead of upkeep

~50%

Fewer operational errors

Automation and workflow optimisation across the lifecycle

~40%

Faster settlement processing

Better client service, less risk carried overnight

70%

Delivered out of the box

Months of custom development avoided

12 CSDs

New markets opened

Direct connectivity from day one, and growing

0 disruption

Service to millions of investors

Controlled deployment, continuous validation, seamless go-live

The starting point

The backbone had become the bottleneck.

What once enabled growth now constrained it. The choice was to keep patching an obsolete system or reimagine the operational foundation.

Rising operational risk

A 30-year-old platform, high error rates from manual processes, and fragmented workflows across the lifecycle.

Growth blocked by technology

Limited scalability restricted entry into new markets, while cross-border ambition kept growing.

Budget consumed by upkeep

Excessive IT spend tied to maintenance rather than innovation, with regulatory complexity increasing across jurisdictions.

No room for error

Any misstep would disrupt daily settlement, client service and regulatory reporting for millions of investors.

The condition of success

Replace ageing infrastructure without operational disruption to daily settlements, client services or regulatory reporting obligations.

What changed

Post-trade became an enabler of expansion.

Cost base

40% off IT and maintenance. Capital that had been funding the upkeep of obsolete technology moved to growth initiatives, and technology teams moved from maintenance to differentiation.

Market access

Twelve CSDs, live from day one and growing. Direct connectivity across time zones and regulatory regimes removed the technology barrier to regional and international expansion.

Speed to market

New products and geographies launch faster. Configuration-led change means the firm can capitalise on opportunities ahead of competitors instead of waiting on a development queue.

Risk and control

Around half the operational errors, and far less manual processing. A materially stronger control environment – the kind boards and regulators ask about directly.

Delivery risk

70% of functionality out of the box. Production-proven workflows removed months of custom build, and structured migration with our team working alongside theirs delivered go-live with minimal disruption.

Capacity for what is next

An n-tier architecture that absorbs volume without proportional cost. Extensible for T+1, settlement compression and emerging market structures, with no second transformation to fund.

Executive takeaway

Market leaders do not compete on trades alone.

Post-trade infrastructure decides whether a firm can scale efficiently, enter new markets confidently, and hold the operational resilience regulators and clients demand. This was not a system upgrade – it was a shift in how post-trade supports growth, resilience and profitability. It also proves the point that stops most institutions from starting: modernisation at this scale can be executed without compromising business continuity.

Capital markets - engineered

Is your post-trade infrastructure ready?

If rising cost, limited scalability or ageing technology is narrowing your strategic options, start with a diagnostic: current state assessed, target model designed, and a controlled path to production – with no upfront fee.

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