Who Is Citadel Founder Ken Griffin, Wall Street's Billionaire Rescue Buyer

For Griffin, who began trading from his Harvard University dormitory some four decades ago and now oversees $71 billion in assets, it is a playbook that stretches back decades.

July 31 : When rival hedge funds face catastrophic losses, billionaire investor Ken Griffin has a habit of identifying opportunities and showing up with a checkbook.Citadel's founder this week reprised his role as one of Wall Street's rescue buyers, stepping in to salvage California hedge fund Situational Awareness as