Dan Keegan

#9 Dan Keegan, Head of Equities, Americas, Citi

While speed is an important measure of success, the men and women in our latest ranking of the world’s top trading technologists are also concerned with reliability, regulation and reputation.

Concerns about system crashes are overshadowing the low-latency arms race that for years has preoccupied the leading innovators in trading technology.

Citigroup has appointed Tim Wildenberg as head of its electronic trading business in the European region.