[Citadel Founder Releases Open Letter, Claims Over 80% of Situational Awareness Original Portfolio Risk Eliminated] BlockBeats News, August 21, Citadel founder and CEO Ken Griffin issued an investor letter regarding the AI fund Situational Awareness. Ken Griffin stated that over 80% of the original portfolio risk of Situational Awareness has been eliminated through nearly 100 block trades, with a total market value exceeding $4 billion, and most vega risk has been swiftly exited. (CNBC)