"Now We Know"... Was the 20-Something Investment Prodigy Who Earned 270% Behind the Semiconductor Stock Swings?

Margin Calls Issued by Lending Banks Amid Heightened Volatility
Aschenbrenner Sells Holdings to Raise Collateral

Investment firm Situational Awareness (SA), led by Leopold Aschenbrenner (25), who was hailed as a prophet in the artificial intelligence (AI) industry, was reportedly on the verge of a margin call crisis after a series of AI stock price crashes.

As a result, SA faced the risk of being forced to liquidate most of its assets, but was dramatically acquired by Citadel, the world’s largest hedge fund.

According to Bloomberg on July 31 (local time), the SA margin call incident was cited as one of the hidden factors behind the sharp decline in semiconductor company share prices from July 27 to 29 and the rebound on the 30th. SA is a hedge fund founded by Aschenbrenner, a former OpenAI researcher.

Leopold Aschenbrenner, founder of the hedge fund Situational Awareness. Instagram

Aschenbrenner was dismissed from one of OpenAI’s research teams in 2023 on allegations of information leaks. In just one year, he established SA, raised initial capital, and achieved an extraordinary return of 270% after fees in only two years. SA’s assets under management were estimated at over 45 billion dollars (about 65 trillion won).

In particular, SA scored major success with its aggressive investment strategy focused on AI beneficiaries such as semiconductor, energy, and data center companies, earning Aschenbrenner the title of “prophet” among individual AI investors.

However, Bloomberg reported that his success was underpinned by excessive leverage. SA borrowed capital amounting to four to five times its own equity from institutions such as Goldman Sachs, JP Morgan, and Bank of America to engage in highly leveraged trades. As AI stocks wavered in recent weeks, returns plummeted rapidly.

Subsequently, the banks that had lent to SA issued margin calls. A margin call occurs when the lender demands additional collateral after the investor incurs significant losses. To meet the margin requirements, Aschenbrenner began liquidating his stock holdings, and as capital flowed out of SA—a giant hedge fund—AI stocks worldwide were shaken as a result.

Citadel reviewed SA’s portfolio and, after reaching out to Aschenbrenner for overnight negotiations, finalized a bargain-priced acquisition of the assets just before the New York market opened on July 30. The portfolio transferred from SA to Citadel included leading AI companies such as SK hynix, SanDisk, Bloom Energy, and Nevius.

News of the deal triggered a surge in share prices for AI beneficiary companies, which had previously been in sharp decline, across the New York Stock Exchange on July 30.

Buk Bukovich, Chief Investment Officer (CIO) of Oraclum Capital, told Bloomberg, “The sharp decline over the past few days was not justified at all. There must have been another reason—and now we know what happened.”

Jim Cramer, a host on US business news channel CNBC, also commented on air, “Once sellers who must liquidate in this manner are flushed out, we finally find the bottom (of the market). This was a ‘liquidation event’—there are many leveraged investors like him (Aschenbrenner).”

This content was produced with the assistance of AI translation services.