Over Uno, Citadel’s Griffin Reveals His Mistakes of 2008 Ken Griffin, who started hedge fund firm Citadel when he was 22, discusses how he felt in 2008 when everything he had built was at risk. Related Articles Hedge Funds Have a Reputation for Ruthlessness. Dmitry Balyasny Took a Different Approach. Michelle Celarier A Veteran of Melvin Capital Preps New Vehicle Stephen Taub What Do We Know About Hedge Fund Activity in FX Options? Sponsored by CME Group