The deal covers a range of standardization, infrastructure and support services for reference date, a category that includes the codes, identifiers and other information pertaining to stocks, bonds and other financial instruments. Accenture will manage incoming and outgoing client data for Citadel, ensuring the information is sorted, accurate and in the proper format.

The company will also provide grid-based infrastructure, as well as data and IT administration and support services.

Chicago-based Citadel has assets of more than $12bn, which it manages through its affiliates.