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The Biggest Trading Loss In History Just Happened

By Hamish Hodder

20 min video·en··435445 views

This is an AI-generated summary of “The Biggest Trading Loss In History Just Happened” — a 20 min YouTube video by Hamish Hodder, published August 20, 2026. It condenses the full transcript into 10 key takeaways with clickable timestamps.

Summary

A 24-year-old AI researcher's hedge fund, Situational Awareness, rapidly grew to $45 billion in assets before collapsing by 67% in a single month due to extreme leverage and concentrated bets on declining AI stocks, forcing a distressed sale to Citadel.

Key Points

  • Leopold Aschenbrenner, a 24-year-old AI researcher, launched the hedge fund "Situational Awareness" in July 2024, quickly gaining notoriety and attracting significant investments. 
  • Within months, the fund raised over $100 million from prominent tech figures and by the end of 2025, managed an astonishing $9 billion, eventually quadrupling investors' money and reaching $45 billion in assets. 
  • The simultaneous fall of its highly leveraged AI positions led to margin calls from lenders like Goldman Sachs, demanding more collateral that the fund could not provide by selling shares in an illiquid market. 
  • Aschenbrenner, a Columbia valedictorian with ties to the effective altruism movement and a former OpenAI employee, was known for his intelligence and obsession with AI. 
  • The fund's rapid growth was largely fueled by extreme leverage, borrowing $3 to $4 for every $1 of equity, which amplified returns but also significantly magnified potential losses. 
  • Situational Awareness made a second critical mistake by concentrating almost all its capital in AI-related stocks, which began a sharp decline in July due to a string of negative market news. 
  • To avoid complete collapse, Situational Awareness was forced to sell its entire public investment portfolio, valued at $16 billion, to Ken Griffin's Citadel at a discount of over 10% to market value. 
  • This distressed sale caused the fund's assets to plummet from $45 billion to under $10 billion in a single month, resulting in a 67% decline for July, though it remarkably remained up 80% for the year. 
  • The market recovery of the sold stocks immediately after the Citadel deal fueled speculation that Citadel might have orchestrated the situation to acquire assets cheaply, though no illegal activity was proven. 
  • Wall Street firms were able to detect Situational Awareness's liquidity crisis early, notably when Intel's stock inexplicably collapsed after a strong earnings report, indicating a massive, forced sell-off by a major fund. 
The Biggest Trading Loss In History Just Happened

The Biggest Trading Loss In History Just Happened

A 24-year-old AI researcher's hedge fund, Situational Awareness, rapidly grew to $45 billion in assets before collapsing by 67% in a single month due to extreme leverage and concentrated bets on declining AI stocks, forcing a distressed sale to Citadel.

Key Points

—Leopold Aschenbrenner, a 24-year-old AI researcher, launched the hedge fund "Situational Awareness" in July 2024, quickly gaining notoriety and attracting significant investments.
—Within months, the fund raised over $100 million from prominent tech figures and by the end of 2025, managed an astonishing $9 billion, eventually quadrupling investors' money and reaching $45 billion in assets.
—The simultaneous fall of its highly leveraged AI positions led to margin calls from lenders like Goldman Sachs, demanding more collateral that the fund could not provide by selling shares in an illiquid market.
—Aschenbrenner, a Columbia valedictorian with ties to the effective altruism movement and a former OpenAI employee, was known for his intelligence and obsession with AI.
—The fund's rapid growth was largely fueled by extreme leverage, borrowing $3 to $4 for every $1 of equity, which amplified returns but also significantly magnified potential losses.
—Situational Awareness made a second critical mistake by concentrating almost all its capital in AI-related stocks, which began a sharp decline in July due to a string of negative market news.
—To avoid complete collapse, Situational Awareness was forced to sell its entire public investment portfolio, valued at $16 billion, to Ken Griffin's Citadel at a discount of over 10% to market value.
—This distressed sale caused the fund's assets to plummet from $45 billion to under $10 billion in a single month, resulting in a 67% decline for July, though it remarkably remained up 80% for the year.
—The market recovery of the sold stocks immediately after the Citadel deal fueled speculation that Citadel might have orchestrated the situation to acquire assets cheaply, though no illegal activity was proven.
—Wall Street firms were able to detect Situational Awareness's liquidity crisis early, notably when Intel's stock inexplicably collapsed after a strong earnings report, indicating a massive, forced sell-off by a major fund.
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