Unsecured letters of credit proposed for clearing margin
Non-financial firms would gain access to unsecured letters of credit for initial margin under Bank of England (BoE) proposals published October 15, 2026. Responses are due January 15, 2027; variation margin practice would remain unchanged.
More collateral, tighter issuer limits
Central counterparties (CCPs) could accept uncollateralised commercial bank letters of credit (LOCs) from non-financial clearing members and clients, removing the existing full-backing requirement.
Acceptance would remain optional and require BoE permission.
The issuer concentration limit would fall from 10 to 5 percent of total collateral; the 25 percent exception when guarantees exceed 50 percent would disappear.
Issuers must be authorised UK or overseas credit institutions, with ongoing credit monitoring.
CCPs must validate LOCs, retain unconditional and irrevocable payment safeguards and approve clearing-member drawdowns beforehand.
Stress tests must capture issuer failures and delayed payments while preserving Cover 2 resources.
Central bank guarantees would remain unchanged.
Optional access carries setup costs
Estimated CCP setup costs are £605,000–£620,000, with baseline annual costs of £3,500–£5,000. Non-financial firms face £40,000–£55,000 upfront and £2,500–£3,500 annually.
Issuer costs are unquantified.
Under Prudential Regulation Authority Basel 3.1 rules effective January 1, 2027, qualifying standby LOCs attract a 100 percent credit conversion factor.
Final rules are proposed for the first half of 2027, without an implementation period and no earlier than the UK CCP Rulebook's commencement.
Scope includes UK CCPs and recognised overseas CCPs deemed systemically important to the UK.
Liquidity relief retains bank exposure
The BoE judges that safeguards make the financial stability benefits outweigh the costs of closer CCP-bank links.
Relief principally benefits creditworthy non-financial firms with established banking relationships, rather than all hedgers.
LOCs complement liquidity management; they do not replace it.