Molecular Settlement: Making Atomic Settlement Work in a Positive Interest Rate Environment
FNA Papers Series
By José Fernando Moreno Gutiérrez , Dr Carlos León & Dr Kimmo Soramäki
The concept of "atomic settlement" promises to revolutionize financial markets by compressing the time between trade and settlement to a fraction of a second while guaranteeing the simultaneous exchange of assets (Delivery versus Payment or Payment versus Payment). While instantaneous and simultaneous settlement effectively mitigates counterparty and replacement-cost risks, it introduces a severe structural drawback: a massive surge in liquidity requirements. Historically, wholesale markets delay settlement by convention, utilizing clearing and netting mechanisms to vastly reduce the capital needed to finalize trades. By stripping away these liquidity-saving mechanisms, atomic settlement forces institutions to hold prohibitively expensive idle balances—a burden that is dramatically amplified in a positive interest rate environment.
To resolve this inefficiency, this paper proposes an alternative framework: "Molecular Settlement." Rather than forcing the instantaneous gross settlement of the smallest individual units (the "atoms"), the paper advocates for an intermediate, centralized liquidity-saving layer. This overlay sits between the trading and settlement layers, utilizing smart algorithms and resequencing techniques to bundle individual transactions into highly efficient, netted sets (the "molecules").
Ultimately, molecular settlement bridges the gap between legacy systems and modern ledger technologies. By intelligently grouping transactions before they reach the settlement system, financial institutions can reduce settlement times from days to mere seconds or minutes, while preserving the vital liquidity savings required to operate profitably in modern financial markets.
