SDX vs Global DLT Exchanges: Switzerland's Digital Securities Venue in Context

SIX Digital Exchange launched in 2021 as the world’s first fully regulated DLT-based exchange and central securities depository. Four years on, the competitive landscape has changed materially: multiple jurisdictions have enacted enabling legislation and established or accelerated digital securities infrastructure. This analysis benchmarks SDX against six international peers across seven dimensions, assessing where Switzerland’s first-mover advantage is durable and where competitive pressure is intensifying.

The Benchmark Framework

Seven dimensions structure this comparison:

1. Regulatory framework enabling the exchange
2. Asset classes available for issuance and trading
3. Settlement mechanism (CBDC, central bank money, commercial bank money, token)
4. Participant count and geographic reach
5. Liquidity and secondary market activity
6. Technology stack
7. Timeline to full operationalisation

Each venue is assessed across these dimensions, with a synthesis of Switzerland’s competitive position concluding the analysis.

SIX Digital Exchange (SDX) — Switzerland

Regulatory framework: FINMA DLT trading facility licence, granted under Switzerland’s DLT Act (2021). The DLT trading facility is a permanent licence category — not a sandbox or pilot — placing SDX on the same regulatory permanence as the traditional SIX Swiss Exchange. FINMA supervision is comprehensive, covering capital requirements, operational resilience, cyber security, and market integrity standards comparable to traditional financial market infrastructure regulation.

Asset classes: primarily tokenised debt securities (bonds, structured notes, Schuldscheindarlehen equivalents as Registerwertrechte); expanding into equity tokens (pilots) and tokenised fund units. Real estate tokens via third-party platforms that interface with SDX custody.

Settlement mechanism: Project Helvetia has demonstrated live settlement using wholesale SNB CBDC — real central bank money on a DLT network. For routine transactions without CBDC, settlement uses commercial bank money with same-day finality. The CBDC integration is the most advanced of any regulated tokenised securities exchange globally.

Participant count: approximately 20–25 CSD participants as of 2025, including Swiss universal banks, cantonal banks, and international institutions. Geographic reach primarily Swiss, with international institutions onboarding for specific transactions.

Liquidity: primary market functioning; secondary market thin. SDX secondary volumes are not publicly disclosed but estimated at CHF 50–100 million quarterly — immaterial relative to primary issuances.

Technology stack: permissioned DLT based on R3 Corda variant; integrated with SIX SIS (traditional CSD), SIX Swiss Exchange, and SIX payment infrastructure. Proprietary SDX digital asset management layer.

Timeline: commercially operational since 2021; secondary market development ongoing; full secondary market maturity projected 2028–2032.

Deutsche Börse D7 — Germany

Regulatory framework: D7 operates under Germany’s eWpG (Elektronisches Wertpapiergesetz, Electronic Securities Act, enacted 2021) for electronic bonds, and more broadly under BaFin supervision as Deutsche Börse’s post-trade digital infrastructure. Unlike SDX’s bespoke DLT trading facility licence, D7 operates as digital post-trade infrastructure rather than a primary DLT venue. Germany’s eWpG allows for the issuance of digital bearer bonds and digital registered bonds (Namensschuldverschreibungen), both without physical certificates.

Asset classes: initially electronic bonds under eWpG; expanding to tokenised fund units and structured products. Germany’s eWpG does not yet cover equity tokens, limiting D7’s asset universe relative to a comprehensive DLT Act framework.

Settlement mechanism: commercial bank money via Deutsche Bundesbank’s TARGET2 system; no CBDC integration in routine operations. The European Central Bank’s wholesale CBDC experiments (Project Stella and successors) have not yet been integrated into D7’s live settlement infrastructure.

Participant count: Deutsche Börse’s established Clearstream network provides access to 2,500+ banks and financial institutions globally — a structural participant advantage that no startup DLT exchange can match. However, this network is for traditional securities; D7 digital securities participants are a much smaller subset.

Liquidity: Clearstream’s existing liquidity infrastructure provides a potential liquidity backstop for D7 digital securities once volumes grow. Currently, D7 digital securities secondary market activity is limited.

Technology stack: D7 leverages Deutsche Börse’s existing post-trade infrastructure with DLT augmentation, rather than a ground-up DLT rebuild. This pragmatic approach reduces technology risk but may limit the capabilities possible on a native DLT architecture.

Timeline: D7 in active development since 2021; live for electronic bonds; full tokenisation functionality ongoing. Germany’s eWpG continues to be expanded — equity token coverage is under legislative consideration.

SDX vs D7 assessment: D7 has the distribution advantage (Clearstream’s global network) but SDX has the regulatory advantage (broader DLT Act framework, CBDC integration, dedicated DLT exchange licence). D7 will likely surpass SDX in volume terms over 5–10 years due to Clearstream’s scale; SDX retains the quality and innovation edge in the near term.

Luxembourg LuxSE / LuxCSD — Luxembourg

Regulatory framework: Luxembourg has positioned itself as Europe’s leading jurisdiction for tokenised bond listing, operating under the general EU regulatory framework supplemented by Luxembourg-specific legislation. The Luxembourg Stock Exchange (LuxSE) launched a dedicated digital securities segment. Société Générale issued the world’s first blockchain-settled bond via LuxSE in 2019 (EUR 100m SFH covered bond, settled on the Ethereum public blockchain) — a landmark transaction that predates SDX’s commercial launch.

Asset classes: tokenised bonds, covered bonds, structured products. Luxembourg’s CSSF (Commission de Surveillance du Secteur Financier) is a sophisticated regulator comfortable with digital asset innovation within EU frameworks, facilitating a wider range of structured product tokenisation than many jurisdictions.

Settlement mechanism: primarily commercial bank money through existing Luxembourg settlement infrastructure. The Société Générale Ethereum settlement was a technical demonstration rather than a routine settlement mechanism. EU wholesale CBDC experiments (Banque de France Project Jura participation) have explored CBDC settlement in Luxembourg context.

Participant count: LuxSE’s 150+ year heritage as Europe’s leading Eurobond listing exchange provides an established issuer and investor network. Tokenised bond listings on LuxSE can access this existing distribution infrastructure.

Liquidity: LuxSE’s traditional Eurobond market provides context for eventual digital securities liquidity; however, tokenised securities on LuxSE currently trade at similar thin volumes to other venues.

Technology stack: multiple blockchain networks have been used for Luxembourg-listed tokenised bonds, including Ethereum (public), Corda (permissioned), and proprietary settlement chains — reflecting Luxembourg’s technology-agnostic regulatory posture.

Timeline: Luxembourg has been active in tokenised bond listing since 2019; the ecosystem continues to develop as EU DLT Pilot Regime participants potentially list on LuxSE.

SDX vs LuxSE assessment: Luxembourg is better positioned for EU issuers seeking EU regulatory recognition (LuxSE listings passport across the EU under Prospectus Regulation); SDX is better positioned for Swiss franc-denominated issuances and CBDC-settled transactions. The two venues are somewhat complementary rather than fully competitive.

DBS Digital Exchange (DDEx) — Singapore

Regulatory framework: DDEx operates under MAS (Monetary Authority of Singapore) licensing as a recognised market operator for digital assets. MAS’s framework for digital payment token service providers (under the Payment Services Act) and capital markets services licensing provides DDEx’s regulatory foundation. Singapore’s Project Guardian — MAS’s flagship institutional DeFi tokenisation initiative — operates alongside DDEx, providing a broader ecosystem context.

Asset classes: initially digital payment tokens (cryptocurrencies) for institutional clients, expanding to tokenised bonds and equity. Project Guardian has extended to tokenised funds, tokenised foreign exchange, and tokenised fixed income in institutional pilot transactions with DBS, JPMorgan, and Standard Chartered participation.

Settlement mechanism: commercial bank money; Project Guardian has explored CBDC settlement in Project Orchid, Singapore’s wholesale CBDC experiment. Live CBDC settlement of tokenised securities has not yet been demonstrated at the scale of Project Helvetia Phase III.

Participant count: DDEx targets institutional and accredited investors in Singapore and across Asia Pacific. DBS Group’s extensive Asian banking network provides distribution advantage in the region.

Liquidity: DDEx has reported digital asset trading volumes exceeding SGD 1 billion in some periods, though this includes cryptocurrency trading alongside tokenised securities — the tokenised securities subset is smaller.

Technology stack: DDEx uses proprietary distributed ledger technology developed within DBS Group, operating as a permissioned network for institutional participants. Project Guardian transactions have used public blockchains (Ethereum, Polygon) for interoperability experiments.

Timeline: DDEx launched in December 2020; continuous expansion since. Singapore is one of the two most active tokenisation jurisdictions globally alongside Switzerland.

SDX vs DDEx assessment: DDEx is stronger in Asian distribution and cryptocurrency-to-tokenised-security crossover use cases. SDX is stronger in pure DLT trading facility regulation, CBDC integration, and European institutional debt securities. The two are natural partners for cross-border linkage rather than head-to-head competitors.

ASX CHESS Replacement — Australia (Cautionary Case)

Background: Australia’s ASX (Australian Securities Exchange) undertook a project to replace its CHESS clearing and settlement system — one of the world’s oldest functional CSD technologies — with a DLT-based replacement, in partnership with Digital Asset Holdings. The project was announced in 2016 with a projected budget of approximately AUD 250 million (approximately CHF 165 million) and a completion timeline of 2021–2022.

Outcome: the project was abandoned in November 2022 after six years and AUD 250 million in expenditure, following a damning independent review by Accenture finding the project behind schedule, over budget, and insufficiently designed. ASX took a write-down of AUD 245 million and returned to a conventional technology replacement approach.

Implications for SDX: the CHESS failure is the most significant data point in the global DLT financial market infrastructure track record. Key lessons:

• Incumbent system replacement is harder than greenfield: SDX was built as new infrastructure alongside SIX SIS, not as a replacement of existing infrastructure. This greenfield approach avoided the integration complexity that defeated CHESS replacement.
• Technology partner selection matters: CHESS relied on Digital Asset Holdings’ DAML smart contract language, a proprietary technology that created lock-in and integration challenges. SDX’s Corda-based approach used a more established institutional DLT platform.
• Regulator engagement is critical: SDX’s development was concurrent with the drafting and enactment of the Swiss DLT Act. CHESS replacement proceeded under existing ASIC frameworks without equivalent regulatory innovation, leaving technical capabilities ahead of legal frameworks.

The CHESS failure has increased global institutional caution about DLT financial market infrastructure projects. SDX’s operational success — having issued real transactions, settled real trades, and demonstrated CBDC integration — is therefore more significant in context.

HKEX Digital Securities — Hong Kong

Regulatory framework: Hong Kong’s SFC (Securities and Futures Commission) and HKMA (Hong Kong Monetary Authority) have both published guidance on tokenised securities, with SFC’s 2023 circular on tokenised investment products providing the clearest framework to date. HKEX has explored tokenised bond issuance through its subsidiary Hong Kong Central Clearing and Settlement System (HKSCC), and the HKMA conducted Project Ensemble for wholesale CBDC in 2023.

Asset classes: tokenised government bonds (HKSAR Government green bond in tokenised form, 2023 — HKD 800m), tokenised money market funds, structured products.

Settlement mechanism: Project Ensemble explored wholesale CBDC settlement for tokenised assets in Hong Kong; the HKD tokenised government bond used a custodian-based settlement approach.

Participant count: HKEX’s established position as Asia’s second largest exchange (by market capitalisation) provides an existing institutional participant network, though its DLT securities segment is nascent.

SDX vs HKEX assessment: Hong Kong’s regulatory complexity (SFC/HKMA dual oversight) and political environment have slowed DLT infrastructure development relative to the ambition. HKEX has the brand and participant network but lacks SDX’s regulatory clarity and CBDC integration depth.

Euroclear and Clearstream Tokenisation Initiatives

Both of Europe’s major ICSDs (International Central Securities Depositories) — Euroclear (Brussels) and Clearstream (Luxembourg, Deutsche Börse subsidiary) — have launched tokenisation initiatives that deserve separate attention as systemic infrastructure providers.

Euroclear: developed the Digital Financial Market Infrastructure (D-FMI) initiative, providing DLT-based issuance and settlement for international bonds. Euroclear has partnered with the World Bank (Kangaroo bonds on blockchain) and the European Investment Bank (EIB digital bond, EUR 100m on Ethereum public blockchain, 2021). Euroclear’s HoldCo structure as a cooperative of the largest global banks gives it an unmatched participant network — nearly every significant global financial institution holds Euroclear accounts.

Clearstream: as Deutsche Börse’s settlement subsidiary, Clearstream’s D7 infrastructure is the vehicle for Germany’s tokenisation ambitions. Clearstream’s Xact Web Portal and associated custody infrastructure serve 2,500+ clients globally.

The Euroclear and Clearstream initiatives are significant because they operate within existing regulatory frameworks (EU, CSDR, EMIR) rather than requiring new DLT-specific legislation. This lowers the adoption barrier but also limits the innovation headroom — transformative DLT capabilities (atomic settlement, CBDC integration, programmable securities) are harder to implement within legacy regulatory structures.

Switzerland’s Competitive Position: The Synthesis

What SDX does better than any peer:

• CBDC integration at live transaction level (Project Helvetia Phase III)
• Permanent regulatory licence under bespoke DLT-specific legislation (not a sandbox)
• Swiss franc primary issuance infrastructure with genuine institutional quality
• Integration with national financial market infrastructure (SIX SIS bridge)

Where SDX faces competitive pressure:

• D7/Clearstream: distribution scale advantage from established CSD networks
• LuxSE: EU regulatory passport for European issuers
• DDEx/Singapore: Asian institutional distribution and Project Guardian innovation pace
• HKEX: access to Chinese institutional demand (once China-Hong Kong tokenisation crossover develops)

SDX’s sustainable competitive advantage: Switzerland’s DLT Act is permanent legislation rather than a pilot regime. CBDC settlement is live. The Swiss franc remains a reserve currency denomination in global bond markets. SIX Group’s infrastructure credibility and capital commitment (~CHF 500m invested) creates a durable foundation. SDX will not be the largest global tokenised securities venue, but it can be the highest-quality Swiss franc digital securities venue for the next decade — which is a genuinely valuable and defensible position.

The Swiss conclusion is that SDX is first and genuinely operational, but the competitive landscape is developing rapidly. SDX’s sustainable advantage lies in CBDC integration depth, Swiss regulatory permanence, and institutional quality — not in first-mover advantage alone.

Published by ZUG DLT — Donovan Vanderbilt. zugdlt.com provides independent institutional intelligence on Switzerland’s distributed ledger technology ecosystem.