Brad Begle, who ran convertible bonds at Citadel Investment Group, is retiring at the end of the month.
Mr. Begle, who turned 38 today, is handing off responsibilities to Ryan Garino and David Grossman, who are now co-heads of Citadel's convertible strategy, said Devon Spurgeon, spokeswoman for the $12.5 billion hedge fund firm founded by Kenneth Griffin.
Citadel lost as much as 55% from its biggest funds in 2008, driven by declines in convertible bonds, but the funds returned as much as 62% last year as markets rebounded.
Mr. Begle joined Citadel in 1994 and worked there for three years before leaving for Toronto-Dominion Bank. He returned to Citadel in 2001. Mr. Garino joined Citadel in 2003 after working at Boston Consulting Group, while Mr. Grossman was hired the following year from Deutsche Bank.