What the Unraveling of a Leveraged AI Trade Can Teach Option Traders

On Thursday, July 30, semiconductor and other AI-related stocks staged an extraordinary rebound. The Philadelphia Semiconductor Index rose approximately 7.5%, while many of the stocks that had suffered the steepest losses during July suddenly moved sharply higher together. The Nasdaq gained 2.8%, even though most stocks in the S&P 500 actually declined that day.

Strong Microsoft earnings and a broader recovery from the previous day’s Fed-related selloff contributed to the rally. But another important event was unfolding behind the scenes: Situational Awareness, a large AI-focused hedge fund run by former OpenAI researcher Leopold Aschenbrenner, had sold most of its publicly traded stock portfolio to Ken Griffin’s Citadel after suffering enormous losses.

The transaction offers an unusually clear example of how leverage, margin pressure, institutional hedging and options positioning can affect stock prices. It also helps explain how a group of stocks can fall much farther than their business fundamentals seem to justify—and then rebound almost all at once when the pressure is removed.

To understand how the episode unfolded, we need to look at how Situational Awareness reportedly built its portfolio and what happens when a large leveraged investor runs out of room.

A Large, Leveraged Bet on the AI Boom

Situational Awareness was founded by Aschenbrenner after he left OpenAI and published a widely read series of essays predicting rapid progress in artificial intelligence. His investment fund applied that thesis to the stock market, making large bets on companies expected to benefit from the construction of AI infrastructure.

Its publicly disclosed holdings included Broadcom, Intel and CoreWeave, while other reporting connected the fund with a broader collection of AI, semiconductor, memory, energy and data-center investments. Many of these were among the market’s biggest winners earlier in 2026.

The fund did not simply invest its clients’ money. It also reportedly used substantial leverage, meaning that it borrowed additional money to control a much larger portfolio. That leverage helped produce remarkable gains while AI-related stocks were rising. According to the Financial Times, the fund returned 439% during the first half of 2026.

But leverage works in both directions.

Suppose a fund begins with $1 billion of investor capital and borrows another $3 billion. It now controls a $4 billion portfolio. If that portfolio rises 25%, it earns $1 billion and doubles the investors’ original capital. But if the portfolio falls 25%, it loses $1 billion and wipes out that original capital.

The stocks do not have to go to zero. A decline that would be painful but survivable for an unleveraged investor can become catastrophic for a highly leveraged fund.

That appears to be what happened to Situational Awareness. AI and semiconductor stocks began falling sharply during July, and on July 31, Aschenbrenner confirmed the scale of the damage directly to investors. In a letter that quickly circulated publicly, he disclosed an unaudited net return of minus 67% for July. Even after that reversal, the fund remained up approximately 80% for the year because of its extraordinary 439% return during the first half.

Aschenbrenner acknowledged that the fund had come “closer to permanent capital impairment than is acceptable to us” and said the episode should serve as a lesson for the firm. Reuters reported the letter’s key disclosures, while AOL published Business Insider’s copy of the letter. According to Reuters, leveraged hedge funds across the market were caught in similar trades, producing margin pressure and forced reductions in AI-related positions.

The Role of the Prime Brokers

Large hedge funds generally operate through prime brokers, which are major financial institutions that provide trading, financing, stock lending, custody and other services. Goldman Sachs and JPMorgan were among the prime brokers involved with Situational Awareness.

When a prime broker lends money to a hedge fund, it holds the fund’s investments as collateral. The broker continually measures whether the value of that collateral is sufficient to support the loan.

If the investments fall too far, the broker can require the fund to supply additional cash or reduce its positions. This is a margin call. If the fund cannot raise enough new money, it may be forced to sell investments regardless of whether its manager believes they remain attractive.

That distinction is essential. A normal investor can decide that a stock has become undervalued and wait for it to recover. A leveraged investor facing a margin call may no longer control the timing. The lender’s need to protect its loan takes priority over the investor’s long-term thesis.

Reuters reported that it was not publicly clear whether Situational Awareness had received formal margin calls before reaching its agreement with Citadel. What is clear is that the fund was under pressure either to raise additional capital or dispose of much of its portfolio. It ultimately chose to transfer most of its public holdings to Citadel.

Aschenbrenner’s own letter confirms the steps the fund ultimately took to stabilize itself. He wrote that the block transaction removed all leverage from the fund, closed every short position and left Situational Awareness holding a fully paid-for public portfolio with no remaining margin or liquidation risk.

How Forced Selling Can Feed on Itself

The initial decline in AI stocks likely stemmed from several factors that had little to do with Situational Awareness: high valuations, rising interest rates, crowded positioning, competition from China, and doubts about whether the enormous amounts being spent on AI infrastructure would generate sufficient profits.

But once the decline placed a highly leveraged fund in trouble, that fund could have become an additional source of selling pressure.

The process can become circular. AI stocks fall, creating losses at leveraged funds. Their lenders demand more collateral or reduced exposure. The funds sell stocks to raise cash. That selling pushes the same stocks still lower, generating additional losses and potentially triggering more sales.

This is sometimes called a forced-liquidation cycle. The important point is that the later stages of the decline may have less to do with investors making calm judgments about the companies’ fundamental value. Prices are being affected by institutions that must sell because of their financing arrangements.

Reuters reported that hedge funds were simultaneously selling long-held AI stocks and covering short positions as they reduced their overall portfolios. Its description captures how complex these liquidations can be. A fund may own some stocks, be short others and hold options or futures that connect the positions. When the entire portfolio is unwound, many securities can move violently in different directions at the same time.

How a Large Portfolio Transfer Can Affect the Wider Market

The reported transaction involved a large and complicated portfolio of publicly traded AI-related investments. The complete contents and structure of that portfolio have not been publicly disclosed, so we do not know exactly which stocks, ETFs, options or other hedges were transferred, closed or retained.

What we can explain is how institutions normally manage a transaction of this size.

A large portfolio buyer does not necessarily want to accept billions of dollars of market risk without protection. While evaluating or negotiating the purchase, it may hedge that risk by shorting individual stocks, selling index futures, buying put options or taking offsetting positions in sector ETFs.

A sector ETF is an exchange-traded fund that owns a basket of related stocks. SMH, for example, is the VanEck Semiconductor ETF and provides exposure to companies such as Nvidia, Broadcom and TSMC. An institution preparing to acquire a large collection of semiconductor investments could potentially use SMH as a convenient hedge against a decline in the entire sector. That does not mean SMH was necessarily used in this transaction; it is simply an example of the tools available to institutions managing this type of risk.

These hedging transactions can affect the wider market even when the original problem is concentrated inside one fund. Selling a semiconductor ETF, shorting semiconductor futures or buying large quantities of protective puts can lead market makers and arbitrage firms to trade the underlying stocks. Pressure originating in one leveraged portfolio can therefore spread across an entire group of related companies.

The same process can operate in reverse after the portfolio transfer is completed. If the buyer no longer needs all its temporary protection, it may reduce its hedges. Dealers and market makers may also reverse positions they established while the distressed portfolio was being unwound. Closing short positions requires buying shares, which can contribute to a rapid rebound.

Where Options Enter the Picture

Although the publicly reported Citadel transaction primarily concerned a portfolio of stocks, options and other derivatives may have affected how the fund, its brokers and the eventual buyer managed their exposure. The details of any such positions have not been publicly disclosed, so the following example illustrates the mechanism rather than describing a confirmed Situational Awareness trade.

Suppose a fund owns a large semiconductor portfolio and buys SMH put options for protection. The market maker that sells those puts assumes the risk that SMH will decline and the puts will become more valuable. To offset that risk, the market maker may short SMH shares.

As SMH falls and the puts become increasingly sensitive to further declines, the market maker may need to short still more shares to remain hedged. This is a practical example of Delta and Gamma affecting the underlying market. The option does not merely respond to the ETF’s movement; the hedging required by the option position can itself generate transactions in the ETF.

Other participants could have similar reasons to sell or short an ETF. A prime broker worried about its exposure to a distressed client might establish protective hedges. A potential buyer examining a multibillion-dollar semiconductor portfolio might short a sector ETF or buy puts so that it would not suffer a large loss while negotiating the transaction. These actions would not necessarily express a long-term bearish view. They could simply protect the institution temporarily against the risk it was preparing to assume.

The reverse process can occur when the crisis ends. If put positions are closed or transferred, market makers may no longer need all their short ETF shares. If a portfolio buyer completes the acquisition, it may reduce the hedges established before the closing. Removing a short position requires buying shares back, which can add considerable upward pressure.

This is one reason an options trader should be careful about interpreting unusual volume. A large put purchase may be a bearish speculation, but it may also protect a large stock portfolio. A large stock sale may represent a negative investment opinion, but it may instead be the hedge for an options position. Seeing only one leg rarely reveals the institution’s actual economic exposure.

Why Sell the Portfolio as a Package?

Situational Awareness could theoretically have sold each holding separately through public exchanges. But attempting to liquidate billions of dollars in concentrated AI positions during a falling market could have driven prices still lower.

Instead, its prime brokers could market the portfolio to large institutions capable of evaluating and purchasing it as a package. On Wall Street, the portfolio is often called a “book,” and the acquisition of most or all of it may be described as a full-book takeout.

Citadel had the capital, trading infrastructure and risk-management capacity to analyze the positions quickly. It could decide which securities it wanted to retain, which it wanted to hedge and which it might eventually sell. Because Situational Awareness urgently needed a solution, Citadel may also have been able to negotiate an attractive price in exchange for accepting a large and complicated portfolio.

This was not a charitable rescue. Citadel presumably believed that the expected return justified the risk. But the transaction could still benefit the wider market by transferring the securities from a distressed owner that was under pressure to sell to a financially strong owner that could hold and manage them.

The Financial Times reported that Citadel’s purchase helped steady markets following what it calculated as a roughly $3 trillion rout in semiconductor-related stocks, largely by reducing fears of a disorderly liquidation. It also reported that the transaction was completed at a discount, which would be normal compensation for accepting a very large distressed portfolio.

What Thursday’s Rebound May Be Telling Us

The timing of Thursday’s extraordinary rebound is instructive. The semiconductor index rose approximately 7.5%, while the Nasdaq advanced 2.8%. Barron’s described the session as a technology-led snapback following the previous day’s market turmoil, with semiconductor stocks among its strongest participants.

Microsoft’s strong earnings provided an important fundamental reason for renewed optimism. Its cloud results helped reassure investors that AI investment was producing real revenue growth. The market was also recovering from an exaggerated reaction to the Federal Reserve.

But the simultaneous rebound across many previously battered AI, semiconductor, memory, data-center and power-related stocks is also consistent with the removal of forced selling.

Before the Citadel transaction, investors may have feared that billions of dollars of securities were still waiting to be liquidated. Potential buyers could remain on the sidelines, knowing that a distressed seller might soon offer the same stocks at lower prices. Short sellers could continue pressing their positions, expecting another wave of institutional selling.

Once Citadel absorbed most of the portfolio, that threat diminished. The market’s largest known distressed seller had been replaced by a buyer with the resources to hold the positions. Prime brokers and market makers could begin removing defensive hedges. Short sellers could buy back shares to protect their profits. Investors waiting for the liquidation to end could return.

All of those actions involve buying. When they occur together after a severe decline, prices can recover with remarkable speed.

That does not prove the preceding selloff was entirely mechanical or that Thursday marked a permanent bottom. The original concerns about valuations, AI spending and interest rates did not disappear. Other leveraged investors could still face pressure. But the rebound suggests that the previous prices may have reflected more than a simple reassessment of the companies’ long-term value. They likely also incorporated a temporary imbalance created by urgent institutional selling.

Citadel and Citadel Securities Are Not the Same Entity

Citadel is Ken Griffin’s hedge fund and investment firm; Citadel Securities is a related but legally separate market-making business. The investment firm reportedly purchased the Situational Awareness portfolio, while Citadel Securities separately published an analysis arguing that the market was underestimating the possibility of a Federal Reserve rate increase — a distinction worth noting since the two firms’ names have been used somewhat interchangeably in the speculation surrounding the deal. That rate forecast may have contributed to market anxiety, since higher rates are generally unfavorable for expensive growth stocks: higher yields make safer investments more competitive, raise financing costs and reduce the present value investors assign to profits expected years in the future.

The proximity of the rate forecast and the portfolio transaction naturally attracted attention, but the more straightforward explanation is that Citadel Securities issued a macroeconomic forecast, semiconductor stocks were already caught in a severe selloff, and Situational Awareness’s leverage turned that selloff into a financial crisis — giving Citadel an opportunity to purchase a distressed portfolio while simultaneously removing a major liquidation risk from the market.

The Larger Lesson for Option Traders

Option traders usually focus on a stock’s expected direction, implied volatility and the probability of reaching a particular strike. But this episode shows why market structure also matters.

A stock can fall because its business outlook deteriorated. It can also fall because a large investor needs cash, because a dealer must adjust a hedge, because a prime broker is reducing exposure or because several funds own the same crowded trade and are being forced to exit together.

Those mechanical forces can push prices beyond what ordinary fundamental analysis would suggest. They can also produce extremely high implied volatility because option prices reflect uncertainty about the size of the next movement—not simply whether a company is good or bad.

For an option buyer, elevated implied volatility means that part of the expected rebound may already be included in the option’s price. A trader can correctly predict that the stock will rise and still overpay for a call if the rebound is smaller or slower than the option market anticipated.

For an option seller, unusually rich premiums may look attractive, but they are often expensive for a reason. During a forced liquidation, price movements can exceed historical norms, correlations can suddenly approach one, and stocks that appear unrelated can fall together. Selling puts merely because their premiums are high can create much larger risk than the credit initially suggests.

The episode also illustrates why large option transactions should not automatically be treated as directional signals. A block of puts can represent bearish speculation, protection for a stock portfolio or one side of a dealer hedge. A large purchase of shares can be a bullish investment, the closing of a short position or the hedge against calls that were sold elsewhere.

Without seeing the complete portfolio, we should be cautious about claiming to know what a large institution is betting.

A Crisis, a Transfer and a Release of Pressure

The most reasonable reconstruction is that a broad decline in AI-related stocks placed Situational Awareness’s leveraged portfolio under severe pressure. The fund and the institutions surrounding it likely reduced positions and established hedges, adding to the weakness. As the danger of a forced liquidation grew, Citadel agreed to purchase most of the public portfolio.

That transaction transferred the securities from an owner with little ability to wait to an owner with substantial capital and flexibility. Once the immediate liquidation threat was removed, some hedges could be unwound, short sellers could cover and other investors could return. Strong Microsoft earnings and the broader post-Fed recovery supplied additional reasons to buy, helping produce Thursday’s sharp rebound.

Situational Awareness was therefore probably both a victim and an amplifier of the decline. Falling AI stocks created its crisis, but the fund’s leverage may have transformed that crisis into additional selling pressure throughout the sector. Citadel’s eventual purchase likely helped prevent the final liquidation from becoming even more disorderly.

Aschenbrenner’s letter confirms the resulting change in the fund’s condition: Situational Awareness was not shut down or converted into a private-only fund. It continues to operate as a hybrid public-private fund, but its remaining public portfolio is now fully paid for and carries no leverage.

For option traders, the central lesson is that prices are not determined solely by opinions about future earnings. Financing, leverage, dealer hedging and institutional necessity can all move the underlying shares—and those movements feed directly into Delta, Gamma, implied volatility and option premiums. Understanding who may be forced to trade, and why, can sometimes be as important as understanding the company itself.

Sources and Further Reading

What the Unraveling of a Leveraged AI Trade Can Teach Option Traders