Sources: Citi Taps RTI Data Messaging

RTI officials confirm that the vendor will this week announce a major client win, but decline to identify the client, beyond describing the firm as "one of the world's largest financial services companies." A spokesperson confirms that Citi is among the vendor's clients-in addition to its Automated Trading Desk subsidiary-as well as Pimco and trading system developer Xivlyn.

South Carolina-based algorithmic equities market maker ATD, which was acquired by Citi in July 2007, is an existing RTI use