What is atomic settlement, and does DvP work today?

Delivery versus payment inside one transaction, and the reason the cash leg is the hard part.

Atomic settlement means the asset leg and the cash leg of a trade move in one indivisible transaction, so neither can complete without the other. The asset leg is straightforward on-chain. The cash leg is the constraint: it requires stablecoins, tokenized deposits or central bank money on the same ledger. Most European settlement today is not atomic.

What is atomic settlement?

Settlement in which two transfers either both complete or neither does, enforced by the ledger rather than by a post-trade process. In securities terms, the asset moves and the payment moves in the same transaction, so there is no interval in which one party has delivered and the other has not.

The benefit is the removal of principal risk between counterparties and the compression of the settlement cycle toward instantaneous. In conventional markets, the same outcome is achieved through infrastructure, netting and default management over a standard cycle, which works well and consumes collateral and time.

The distinction that gets blurred commercially: instant transfer of an asset is not atomic settlement. If the cash leg is a bank payment confirmed separately, the transaction is fast on one side and unchanged on the other, and the risk between the legs persists. Atomicity is a property of the pair of transfers, not of either one.

How does delivery versus payment work inside a single transaction?

Both legs are represented on the same ledger and executed by one atomic operation — a smart contract, or a settlement mechanism that treats the two transfers as inseparable. If either transfer would fail its conditions, the whole transaction reverts and neither leg occurs.

Three preconditions have to hold. The asset must be transferable on that ledger and its eligibility rules satisfied. The cash must exist on the same ledger as a claim the seller will accept. And both parties must be able to instruct the transaction, which in practice means custody and key arrangements that support it.

The eligibility condition is easy to overlook. A permissioned security will reject a transfer to an unverified address, so an atomic transaction against a whitelisted counterparty succeeds and the same transaction against an unverified one fails cleanly. That is DvP and eligibility enforcement working together, which is the design most European tokenized securities need. Read how eligibility is enforced at the token level.

Why is the cash leg the hard part?

Because money is issued by institutions whose obligations and infrastructure predate ledgers, and putting a credible claim on money onto a shared ledger requires either a regulated issuer or a central bank. The asset leg needs only a token standard; the cash leg needs a balance sheet and a licence.

There is also a hierarchy-of-money problem. A tokenized claim is only as good as its issuer: commercial bank money carries bank credit risk, an e-money token carries issuer and reserve risk, and central bank money carries none of that but is not generally available on third-party ledgers. Central banks have been explicit that the settlement asset matters, which is why wholesale settlement experimentation has focused on it.

And there is a regulatory constraint. CSDR assumes settlement in a securities settlement system with cash settlement arrangements to match; the DLT Pilot Regime grants targeted exemptions, including the ability to settle in commercial bank money rather than central bank money in defined cases. Without those exemptions, a ledger-native cash leg has nowhere to sit.

What are the options for the cash leg — stablecoin, tokenized deposit or central bank money?

The Eurosystem has run exploratory work with market participants on settling DLT-based transactions in central bank money, and the ECB has published on that programme; the BIS has done extensive work on tokenisation and the role of the settlement asset, including its unified-ledger analysis. Read those directly rather than second-hand: they are the clearest available statements of why the settlement asset is treated as the central question.

For a fund or an issuer choosing today, the practical answer is usually an e-money token where the counterparties will accept one, and a bank transfer where they will not.

Does atomic settlement actually work in production today?

Yes in a small number of venues, and no as a market default. Under the DLT Pilot Regime, 21X states that it opened the first EU DLT trading and settlement system fully on 8 September 2025, offering smart-contract based issuance, trading and atomic settlement of tokenized stocks, bonds and funds. Within such an infrastructure, atomic DvP is operational.

Where it does not work: any structure whose cash leg is a bank transfer, which is most European tokenized issuance; cross-venue transactions where the two legs sit on different ledgers; transactions against fiat outside a pilot-regime infrastructure; and most fund subscriptions and redemptions, where the fund’s own NAV cycle governs timing regardless of settlement technology.

It also does not work simply because a stablecoin is involved. Paying for a tokenized security with a stablecoin in a separate transaction is two transfers, not one, and the party who moves first carries the risk. Atomicity requires the transfers to be bound together, which requires infrastructure designed for it.

So the honest summary: proven, narrow, and growing slowly. Anyone claiming atomic settlement should be asked which ledger the cash sits on and which venue or contract binds the legs.

What has to change for this to become standard?

Four things, in order of likely impact. A widely accepted regulated cash leg — either e-money tokens at scale or tokenized deposits with interoperability between banks. Wholesale central bank money available on ledgers used by market infrastructures, which is the subject of ongoing Eurosystem and BIS work rather than a settled matter.

Third, permanent market-infrastructure rules rather than exemptions. The pilot regime’s CSDR carve-outs are time-limited and capped; making settlement finality and account segregation work for ledger-native structures in the standing rulebook is what the current reform debate is ultimately about.

Fourth, interoperability. Atomic settlement inside one venue is available now; atomic settlement between venues, or between an asset on one ledger and cash on another, requires bridging arrangements whose failure modes are not yet well understood or well regulated.

Until those land, treat atomic settlement as a capability of specific infrastructures rather than a property of tokenization. Read which exemptions the pilot regime grants and who holds a permission, where the cash leg sits in a subscription, or the EU regulatory stack.