Glossary

Atomic Settlement

A settlement mechanism where the exchange of securities and payment occurs as a single indivisible transaction — either both legs settle simultaneously or neither settles — eliminating counterparty risk and enabling T+0 finality on Tadawul's digital securities platform.

Settlement Time 3-7 seconds

Failure Rate 0.02%

Protocol R3 Corda

Availability 99.98%

Definition

Atomic settlement is a settlement mechanism where the exchange of securities and payment occurs as a single indivisible transaction — either both legs settle simultaneously or neither settles. This eliminates counterparty risk and enables T+0 finality, meaning trades are final the moment they execute. On Tadawul’s digital securities platform, atomic settlement completes in 3-7 seconds using R3 Corda distributed ledger technology.

How Atomic Settlement Works

In conventional securities settlement (T+2), a buyer and seller agree on a trade, but the actual exchange of securities for cash occurs two business days later. During this gap, both parties face counterparty risk — the possibility that the other side defaults before settlement completes.

Atomic settlement eliminates this gap entirely. The process on Tadawul’s platform operates as follows:

Trade matching: A buyer and seller agree on price and quantity through Tadawul’s X-Stream INET order matching engine
Settlement instruction: The matched trade generates a settlement instruction on R3 Corda
Simultaneous exchange: The buyer’s SAR payment (via SAR stablecoin, digital riyal, or bank payment channel) and the seller’s security token swap in a single atomic transaction
Edaa register update: The depository’s DLT register immediately reflects the new ownership
Finality: The transaction is irrevocable — no settlement lag, no pending status

The “atomic” property means the transaction cannot be partially executed. If the buyer lacks sufficient SAR or the seller’s token transfer fails, the entire transaction reverts — neither the payment nor the securities move.

Comparison with Traditional Settlement

Feature	T+2 Settlement	Atomic Settlement (T+0)
Settlement time	2 business days	3-7 seconds
Counterparty risk	Present during T+2 gap	Eliminated
Capital locked	Buyer’s cash + seller’s securities	Released immediately
Failed settlement rate	1-3% globally	0.02% on Tadawul digital platform
Reconciliation required	Multiple intermediary reconciliations	Single atomic event
Cost	Higher (CCP, clearing fees)	Lower (no CCP required)

Saudi Regulatory Framework

The CMA’s Securities Tokenization Standards mandate atomic settlement capability for all tokenized securities listed on Tadawul’s digital platform. The CMA specifies:

Settlement finality within 10 seconds maximum
Delivery-versus-payment (DvP) as the only permitted settlement method for exchange-traded tokenized securities
Edaa as the settlement finality provider and official registrar
Mandatory settlement failure reporting within 1 hour

SAMA governs the payment leg of atomic settlement through the Payment Token Regulatory Framework — ensuring that the SAR payment instrument used in atomic DvP meets monetary stability and AML/CFT requirements.

Application to Saudi Tokenized Securities

Atomic settlement applies to all instrument types on Tadawul’s digital platform:

Tokenized sukuk: Atomic DvP for sukuk certificate trading and profit distribution
Equity tokens: Atomic DvP for fractional equity trading
Digital bonds: Atomic DvP for bond trading and coupon settlement
Commodity tokens: Atomic DvP for commodity-backed token trading

Cumulative atomic settlement volume on Tadawul’s platform reached SAR 4.2 billion through Q1 2026 with zero settlement failures — validating the technology in production conditions.

International Comparison

Saudi Arabia’s atomic settlement infrastructure is among the most advanced globally:

vs. UAE: Saudi achieves 3-7 second settlement on R3 Corda; UAE ADX and DFM operate conventional T+2 with DLT pilot
vs. GCC peers: Saudi is the only GCC exchange with production atomic settlement for tokenized securities
vs. Switzerland (SDX): Comparable T+0 capability; SDX uses different DLT protocol
vs. Singapore (MAS/SGX): Comparable pilot-stage atomic settlement; different regulatory approach

Saudi Arabia’s FATF membership (since 2019) ensures that atomic settlement processes include AML/CFT transaction screening — real-time compliance checks execute within the atomic settlement window without adding material latency.

Implications for Investors

For investors in Saudi tokenized securities, atomic settlement provides:

Immediate ownership: No T+2 waiting period — tokens are yours within seconds of trade execution
Reduced risk: No counterparty default risk during settlement
Capital efficiency: SAR proceeds from sales are immediately available for reinvestment
Transparency: Settlement status is recorded on Edaa’s DLT register in real-time
Lower costs: Elimination of CCP clearing and reconciliation costs reduces overall trading costs
Audit trail: Every atomic settlement event is permanently recorded on the R3 Corda ledger, providing investors and regulators with a verifiable, tamper-proof record of all trade executions, timestamps, and counterparty details — strengthening both compliance and dispute resolution