Citigroup lost two traders in its North America interest-rates trading group, including its head of automated market making, Mike Sung, according to people with knowledge of the matter.

Bloomberg News reports that Sung, a managing director, resigned last week, said the people, who asked not to be identified discussing personnel. Inflation trader Ryan Hall, 30, also resigned, one of the people said. Sung, Hall and Scott Helfman, a spokesman for Citigroup, declined to comment.

In the meantime, Bloomberg News also reports that Sberbank CIB hired former Citigroup managing director Dmitry Ankudinov as an adviser to Chief Executive Officer Oleg Ganeev after several employees left the equities division of the investment bank.

Ankudinov, who was head of investment banking for Citigroup in Russia, joined on February 1.

Citigroup’s Head of Electronic Rates Trading Is Said to Exit

Sberbank CIB Hires Citigroup’s Ankudinov After Equity Departures