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On August 31, 2017 London Stock Exchange Group (“LSEG”) completed the acquisition of The Yield Book and Citi Fixed Income Indices businesses from Citi.  The acquisition of this world-class fixed income analytics and index business enhances LSEG’s Information Services division, allowing FTSE Russell – a dedicated, independent global index specialist – to offer clients a comprehensive fixed income index family, broader multi-asset capabilities, and a deeper data and analytics service. 

We believe this transaction creates additional choice, opportunities for innovation, and added value for a broad range of global users.  Our combined capabilities pave the way for a new generation of fixed income index and analytics solutions.

If you have any questions about the transition, please get in touch with your business contact and we will be happy to assist. Further information for clients is available in our Client FAQs.


A message from Mark Makepeace, CEO FTSE Russell and
Richard Burns, CEO The Yield Book


Additional information

Changes to Citi Fixed Income Indices' index names

Introducing new names for the Citi Fixed Income Indices

Following London Stock Exchange Group's (“LSEG”) acquisition of The Yield Book and Citi Fixed Income Indices businesses from Citigroup, the names of the indexes have changed from “Citi [Name of Index]” to “FTSE [Name of Index].” The index naming conventions remain unchanged, only references to Citi have changed to FTSE. For example, the “Citi World Government Bond Index” has become “FTSE World Government Bond Index.” Acronyms such as WGBI have changed. 

A detailed list of legacy and new index names can be referenced here

Implementation and timing

On September 30, 2017, we notified our clients of the anticipated changes to Citi’s fixed income index names as a result of their acquisition by London Stock Exchange Group (LSEG).  Following that announcement we worked closely with our clients to ensure that we understood the impact of this change to their businesses and their required timeframe for the implementation of the rebrand. 

The transition to the new index names was completed on July 31, 2018. We would like to thank our clients for working with us through this rebranding process, and for making the changes to their platforms and materials that have occurred as a result of this rebrand.

What’s happening to The Yield Book brand?

There will be no change to The Yield Book name. The Yield Book product will retain “The Yield Book” name, adding a light underline “by FTSE Russell” to the logo.

About The Yield Book and Citi Fixed Income Indices

The Yield Book’s highly respected analytics platform is operating in its third decade and serves approximately 350 institutions globally including investment management firms, banks, central banks, insurance companies, pension funds, broker-dealers, hedge funds and investment management firms. The Yield Book’s products offer analytical insights into a broad array of fixed income instruments with specific focus on mortgage, government, corporate and derivative securities. The Yield Book’s mortgage models, developed in collaboration with Citi’s mortgage quantitative analysis and research teams, are widely considered to be the industry standard. Further, LSEG and Citi have entered into a long-term partnership, by which each is committed to collaborating on future development and support of certain models and associated products. Citi will remain a significant customer of The Yield Book and a long term partner.

Citi Fixed Income Indices have been producing fixed income indexes for more than 30 years. These indexes, designed to appeal to a wide range of market participants, are widely followed and broadly published. The World Government Bond Index is among the most closely followed globally. Citi’s Fixed Income Indices have approximately 300 clients globally, including 200 buy-side fixed income asset managers and asset owners. From traditional market value-weighted benchmarks to innovative alternatively-weighted strategy indexes, the comprehensive family of indexes will join FTSE Russell’s existing portfolio of complementary indexes, broadening its multi-asset offering. The indexes will continue to be maintained based on existing design criteria and calculation methodologies, and will continue to align with regulatory requirements such as the IOSCO principles.

Visit The Yield Book Website