How the biggest hedge fund managers did in the first half

It’s been the best start to a year for hedge funds in a decade, and the returns for the biggest multi-strategy money managers are in.

Ken Griffin, who runs the $30 billion hedge-fund firm Citadel, is beating his largest rivals, gaining 13.6% in the first six months of the year in his flagship funds, according to a person with knowledge of the matter. Read more