Weekly brief: a tokenised Treasury enters triparty repo (week ending 16 October 2026)

The week in one paragraph

BNY used a tokenised US Treasury as triparty repo collateral [1]; the Bank of England proposed letters of credit as CCP initial margin [2]. The EBA named MiCA's first significant e-money token [3], ESMA declared the EU's T+1 framework complete [4] and ASIC consulted on digital asset and tokenised custody standards [5]. The IMF examined tokenisation and collateral reuse [6] [7], CPMI and IOSCO finalised FMI business-risk guidance [8] and the FSB sent the G20 a stablecoin note [9]. The thread: as tokenised collateral reaches core financing, authorities are focusing on the controls around it.

Americas

BNY completes a triparty repo using a tokenised US Treasury

On 13 October BNY said it had completed a triparty repo workflow with Citadel Securities using a tokenised US Treasury, which it describes as the first use of tokenised assets on a major triparty repo platform [1]. Citadel Securities bought a two-year note through BNY on Tradeweb; its tokenised representation, recorded on BNY's private digital ledger, settled within minutes and was then used as collateral in an overnight triparty repo, with BNY providing cash [1].

What it changes: The token moved from settlement into financing inside an existing triparty structure, so eligibility schedules and the repo agreement are likely to remain the control points. Open questions include token-to-security reconciliation and the fallback if the ledger is unavailable.

UK

Bank of England consults on letters of credit as CCP initial margin

On 15 October the Bank of England proposed rules that would let UK CCPs accept uncollateralised letters of credit as initial margin from non-financial firms, including those that clear as clients [2]. The proposals would remove the full-collateralisation requirement, cut the single-issuer limit from 10% to 5% of a CCP's total collateral, require ongoing monitoring of issuers' creditworthiness and expect letters of credit to be included in stress testing; the Bank does not expect them to be used for variation margin. No UK-based CCP currently accepts commercial bank guarantees; responses are due by 15 January 2027 [2].

What it changes: Not a tokenisation measure, but it shows how the Bank approaches a new collateral type: wider eligibility in exchange for issuer limits, monitoring and stress testing. Corporate hedgers could need less cash for initial margin.

Europe

EBA classifies USDC as the first significant e-money token

On 14 October the EBA classified USDC, issued in the EU by Circle Internet Financial Europe SAS, as a significant e-money token under MiCA, the first of 45 notified e-money tokens to receive that status [3]. From 12 November 2026, direct supervision of own funds, reserve assets, liquidity, and recovery and redemption plans moves from France's ACPR to the EBA, which has also signed a memorandum of understanding with the New York State Department of Financial Services [3].

What it changes: For teams assessing stablecoins as a cash leg, USDC's EU reserve and redemption arrangements will be supervised at EU level.

ESMA says the EU's T+1 framework is complete

On 16 October ESMA restated that the EU moves to T+1 on 11 October 2027 and published final revised CSDR guidelines on standardised procedures and messaging protocols. From 7 December 2026, investment firms and their clients must meet new allocation and confirmation requirements, including electronic, standardised and machine-readable communication; ESMA asked participants to begin testing as soon as possible [4].

What it changes: T+1 compresses the window for allocation, confirmation, lending recalls and collateral substitution. Business cases for tokenised settlement in the EU are likely to be measured against a T+1 baseline.

Asia-Pacific

ASIC consults on standards for digital asset and tokenised custody platforms

On 15 October ASIC opened Consultation Paper 392 on guidance and standards for digital asset platforms and tokenised custody platforms, which record underlying assets held for clients as digital tokens, under new laws commencing on 8 April 2027. It proposes standards on asset-holding, trading and settlement activities, and financial requirements; it closes on 27 November 2026 [5].

What it changes: Australia is regulating the token record as well as the underlying asset; the asset-holding standards are where custodians should look for expectations on keeping the two aligned.

Global

IMF stability report flags collateral reuse in tokenised markets

The IMF's October 2026 Global Financial Stability Report, published in full on 13 October, includes a tokenisation chapter (released on 8 October) naming four constraints: legal certainty, regulatory clarity, interoperability and the availability of settlement assets [6] [7]. The chapter puts the 30-day average daily volume of tokenised repos at $303 billion and tokenised money market funds at about $17.5 billion, "held primarily as yield-bearing, cash-like collateral" [7]. It says authorities should monitor collateral velocity and reuse and consider limits or haircuts on reuse of tokenised collateral, and notes that atomic settlement can increase intraday liquidity needs by requiring prefunding.

What it changes: The IMF's collateral recommendations target reuse and velocity; supervisors may ask how reuse is tracked across ledgers and how prefunding is sized under stress.

CPMI and IOSCO finalise guidance on FMI general business risk

On 14 October CPMI and IOSCO published final guidance supplementing the Principles for financial market infrastructures: how FMIs manage general business risks, and the minimum liquid net assets funded by equity to hold against potential business losses, including in recovery and orderly wind-down [8].

What it changes: DLT-based platforms that operate as FMIs fall under the same principles as incumbents; an equity-funded buffer against business losses may weigh more on platforms still making losses.

FSB sends the G20 a note on global stablecoin vulnerabilities

On 12 October the FSB published its Chair Andrew Bailey's letter to G20 finance ministers and central bank governors, with a note on global stablecoin arrangements. The note outlines further work on monitoring cross-border vulnerabilities and on implementing the FSB's 2023 recommendations, particularly through cross-border cooperation and information sharing [9].

What it changes: Read with the EBA's agreement with the New York regulator [3], stablecoin supervision points towards more cross-border information sharing, so for settlement use the issuer's supervisory perimeter matters as well as the token's design.

What to watch next week

• 23 October: the FCA's call for input on tokenised gold closes; it asks whether tokenising gold could improve how it is "traded, transferred, pledged and held" in UK markets [10].
• Rest of October: whether DTCC's tokenisation service goes live; in July DTCC said it was set to launch in October 2026 [11].
• Further out: 12 November, EBA's share of USDC supervision begins [3]; 27 November, ASIC CP 392 closes [5]; 7 December, EU allocation and confirmation rules apply [4]; 15 January 2027, the Bank of England consultation closes [2].