He will divide his time at Citadel between London and New York.
It is as yet unclear who will succeed Edsparr. Chris Willcox in London and Matt Zames in New York, co-heads of global rates and currency trading excluding Asia, including Japan, are thought to be strong contenders. Troy Rohrbaugh, London-based head of global FX options and head of FX trading, and Ray Eyles, co-head of global energy sales and trading in London, are also thought to be in the running.
JP Morgan confirmed the departure but declined to comment on Edsparr's successor.