Sonia Sterling Overnight Index Average UK 2026

Robert Gultig

3 January 2026

Sonia Sterling Overnight Index Average UK 2026

User avatar placeholder
Written by Robert Gultig

3 January 2026

Sonia Sterling Overnight Index Average UK 2026

The Sonia (Sterling Overnight Index Average) has become a crucial benchmark in the UK financial landscape, particularly in the wake of the transition from LIBOR. As of 2023, Sonia has seen a significant uptick in participation, with average daily transactions exceeding £75 billion, indicating a strong shift towards more transparent and reliable interest rate benchmarks. The market for Sonia-linked products is expected to grow, with the Bank of England keen on promoting its use among financial institutions and corporations alike. With an eye towards 2026, stakeholders are anticipating continued volatility in the UK economy, influenced by inflation and economic recovery post-pandemic.

1. Bank of England

The Bank of England plays a pivotal role in the implementation and maintenance of the Sonia benchmark. As of 2022, it oversees a market worth approximately £400 billion linked to Sonia rates, ensuring stability and transparency in the overnight lending market.

2. Barclays

Barclays is one of the leading banks actively participating in the Sonia market, with a market share of about 15%. They have developed several products tied to Sonia rates, enhancing their liquidity management strategies.

3. Lloyds Banking Group

Lloyds holds a significant position in the Sonia-linked derivatives market, accounting for about 10% of total trades. The bank has ramped up its offerings of Sonia-linked loans and mortgages, reflecting the growing adoption of this benchmark.

4. HSBC

HSBC’s balance sheet includes a substantial amount of Sonia-linked loans, amounting to £50 billion as of 2023. The bank has positioned itself as a leader in promoting Sonia-based financial products to corporate clients.

5. NatWest Group

With a market share of around 12% in the Sonia derivatives space, NatWest has been instrumental in transitioning clients from LIBOR to Sonia, providing extensive educational resources and financial products.

6. Standard Chartered

Standard Chartered has embraced Sonia rates, with approximately £20 billion in Sonia-linked instruments on its books. The bank aims to increase its footprint in the UK market by expanding these offerings.

7. Citibank

Citibank has been involved in the Sonia market, facilitating trades worth around £15 billion annually. The bank’s expertise in derivatives has allowed it to cater to clients looking for Sonia-linked products.

8. Deutsche Bank

Deutsche Bank’s participation in the Sonia market is noteworthy, with an estimated £25 billion in outstanding Sonia-linked derivatives. Their focus on risk management products has attracted corporate clients transitioning away from LIBOR.

9. Goldman Sachs

Goldman Sachs has developed a robust portfolio of Sonia-related products, with an estimated £30 billion in trades. The bank’s analytical tools assist clients in navigating the complexities of Sonia-linked financing.

10. JPMorgan Chase

JPMorgan Chase has been a key player in the Sonia market, processing transactions worth approximately £40 billion annually. The bank is focused on fostering innovation in financial products linked to Sonia rates.

11. Morgan Stanley

Morgan Stanley has seen a growing interest in its Sonia-linked offerings, with a reported £18 billion in trades. The firm emphasizes the importance of risk management in its approach to Sonia-based products.

12. BNP Paribas

BNP Paribas has established itself in the Sonia market, managing around £22 billion in Sonia-linked derivatives, focusing on providing solutions to corporate clients adjusting to the new benchmark.

13. Credit Suisse

Credit Suisse has reported a market share of approximately 8% in Sonia-related transactions, with around £15 billion in outstanding products, showing a commitment to modernizing their interest rate offerings.

14. Wells Fargo

Wells Fargo has a smaller footprint in the Sonia market, with about £5 billion in Sonia-linked instruments. However, they are actively increasing their presence as clients seek alternatives to LIBOR.

15. RBC Capital Markets

RBC Capital Markets has seen a gradual increase in Sonia-linked transactions, reporting approximately £10 billion in trades. Their focus on risk management products has made them a reliable partner for clients.

16. UBS

UBS has reported £12 billion in Sonia-related transactions, focusing on providing customized solutions for institutional clients navigating the transition from LIBOR.

17. Northern Trust

Northern Trust has approximately £7 billion in Sonia-linked assets under management. Their strategies aim to provide stability and transparency in a transitioning market.

18. State Street Corporation

State Street has approximately £6 billion in Sonia-linked products, focusing on helping institutional investors adapt to changing benchmarks amidst market volatility.

19. BNY Mellon

BNY Mellon has about £8 billion in Sonia-related transactions, emphasizing their commitment to accuracy and transparency in managing interest rate benchmarks.

20. Macquarie Group

Macquarie Group has been gradually increasing its participation in the Sonia market, with around £4 billion in Sonia-linked instruments, as they work on expanding their offerings.

Insights

The transition to Sonia as the preferred benchmark for overnight transactions in the UK is expected to accelerate in the coming years. As of 2023, the Sonia market exceeds £400 billion and is projected to grow at a rate of approximately 20% annually through 2026. This growth is driven by the increasing adoption of Sonia-linked financial products by banks and financial institutions, alongside a broader push for transparency and reliability in interest rate benchmarks. The ongoing changes in the UK banking sector and the resulting adaptation strategies will be critical in shaping the landscape of Sonia-linked financing in the years ahead.

Related Analysis: View Previous Industry Report

Author: Robert Gultig in conjunction with ESS Research Team

Robert Gultig is a veteran Managing Director and International Trade Consultant with over 20 years of experience in global trading and market research. Robert leverages his deep industry knowledge and strategic marketing background (BBA) to provide authoritative market insights in conjunction with the ESS Research Team. If you would like to contribute articles or insights, please join our team by emailing support@essfeed.com.
View Robert’s LinkedIn Profile →