Many major hedge funds reportedly lost ground in October, while Citadel gained

Marshall Wace's Eureka fund reportedly lost 5.4% in October, reducing its year-to-date gain to 5.3%, according to a person familiar with its performance. ExodusPoint reportedly lost 2.4%, Dymon Multistrategy 1.8% and North Rock 2.3%, according to people familiar with those nonpublic results. Citadel made gains.