In 2008, Citadel faced a severe 16-week crisis during which its survival was uncertain.

Ken Griffin is concerned that Western nations are losing the fiscal capacity for countercyclical spending required to manage the next economic downturn.

Citadel Securities trades approximately 25% of the daily U.S. equity turnover.

Citadel Securities has recently averaged approximately $1 trillion per day in turnover.

Ken Griffin predicts a global recession will occur in the foreseeable future.

During Citadel's 2008 crisis, CNBC had a van parked outside its offices in anticipation of filming a bankruptcy announcement.