The AI trade needed two things to turn: proof that the spending pays off, and an end to the forced selling that had amplified every decline. On Thursday, it got both at once.
Microsoft delivered its largest single-day gain in eighteen years, exploding 16% and adding roughly $450 billion in market value — the most any stock has ever added in a single session. The move detonated a broad relief rally that ended the semiconductor sector’s worst stretch in months. The Philadelphia Semiconductor Index surged 8.2%, snapping a five-day losing streak and posting its best day since April 2025, while the Nasdaq-100 jumped 3.4%, ending a six-session slide. After a week defined by capex fear, a bond-market revolt, and a chip bear market, the tape flipped hard to risk-on. The Microsoft rebound became the single most powerful force in the market.
The catalyst was twofold: Microsoft’s blowout Azure numbers gave the bulls the return-on-investment evidence they’d been demanding, and the disorderly liquidation of a prominent AI hedge fund — which had been the hidden hand behind much of the recent selling — finally cleared. Together, they marked what many on Wall Street began to call the bottom of the correction.
Index Performance
The Fall of Situational Awareness
The most important story of the day wasn’t on any earnings calendar — it was the collapse of a hedge fund most retail investors had never heard of.
Situational Awareness (SA), a technology and AI-focused hedge fund, had been battered for weeks. Its long positions in AI infrastructure names like SK Hynix cratered during the semiconductor rout, while its short bets against software companies backfired as those very stocks rallied. Squeezed from both sides, the fund faced mounting margin calls, and by Thursday it had sold its entire portfolio to Citadel. Its prime brokers — Bank of America, Goldman Sachs, and JPMorgan — had spent the prior day marketing baskets of SA’s longs and shorts to potential buyers as part of an orderly wind-down.
The market’s reaction revealed just how much of the recent carnage had been driven by this single forced seller. Once SA’s liquidation was known to be complete, the stocks it had been dumping erupted: SK Hynix soared 17.52%, SanDisk rocketed 26%, Nebius jumped 27%, and CoreWeave surged 21%. These are the same names that had been in freefall — over the past month, SanDisk had fallen 44%, Marvell 39%, Nebius 31%, CoreWeave 25%, Intel 33%, and KLA 39%. The violence of the rebound confirmed what many suspected: the declines were as much about mechanical deleveraging as about fundamentals.
Naturally, the episode spawned its conspiracy theories. Citadel had argued for a rate hike at the FOMC meeting — a stance that, skeptics noted, would pressure exactly the kind of high-multiple growth stocks SA was long, potentially deepening its distress before Citadel swept in to buy the portfolio cheaply. Others pointed to SA’s software shorts, which had become dangerously exposed as software stocks climbed, making the fund a target. Whatever the mechanics, CNBC’s Jim Cramer framed the forced selling’s conclusion as a stabilizing event for the entire AI trade — the removal of a distressed seller that had been capping every attempted rebound.
The Microsoft Rebound Lights the Fuse
If SA’s collapse cleared the selling pressure, Microsoft supplied the reason to buy. Following Wednesday’s after-hours report — revenue of $90.01 billion, Azure growth of 43% at constant currency versus the 40% expected, and the disclosure that Azure surpassed $100 billion in annual revenue for the first time — the stock opened sharply higher and never looked back, finishing up 16%.
The significance went beyond Microsoft itself. This was the cleanest proof yet that massive AI capital spending can translate into accelerating, above-expectations cloud growth. Coming just a week after Alphabet was punished for spending without a clear payoff, Microsoft’s report reframed the entire debate — and investors “fell back in love with the Mag 7,” as Interactive Brokers’ Steve Sosnick put it, extending the enthusiasm to Alphabet and the broader complex even as they looked past the day’s disappointments.
After the Bell: Amazon Delivers, Apple Disappoints
The earnings drama continued after Thursday’s close, with the last two mega-caps splitting the verdict once again.
Amazon jumped roughly 7% in extended trading after AWS cloud revenue grew 37%, reinforcing the Microsoft-led narrative that cloud demand remains robust and that AI infrastructure spending is converting into growth. It was the third consecutive hyperscaler — after Microsoft and, in its own delayed way, Alphabet — to validate the cloud-returns thesis.
Apple went the other direction, falling about 4% after hours on weak China sales and softer-than-expected services revenue. Apple’s problem is distinct from the capex debate consuming its peers: it isn’t spending too much on AI, it’s arguably behind, and its exposure to a slowing Chinese consumer and decelerating services growth left it out of step with the day’s cloud-driven optimism.
Rates and the Yen: The Undercurrents
Beneath the equity euphoria, the bond market kept flashing caution. Long-term yields continued to grind higher, as Warsh’s evident reluctance to raise rates left inflation-wary investors selling long-dated Treasuries — the same bond-vigilante dynamic that had driven the 30-year to a 19-year high the day before. The one piece of genuine macro relief came from the June PCE report, the Fed’s preferred inflation gauge, which came in cooler than expected, offering a counterweight to the geopolitical inflation fears.
Currency markets provided the day’s most dramatic sideshow. The dollar-yen exchange rate plunged more than 2% intraday, from around 162.8 to 157.8, after Nikkei reported that the Japanese government had intervened directly in the market to defend the yen — a rare and forceful move that underscored how much strain the strong dollar and diverging monetary policies have placed on Tokyo.
Bottom Line
Thursday was the mirror image of the week that preceded it. Where the market had spent five sessions punishing AI spending, doubting the Fed, and drowning in forced liquidation, it spent this one rewarding proof of returns and celebrating the exhaustion of a distressed seller. The 8.2% SOX surge and Microsoft’s record-setting $450 billion gain didn’t just recover lost ground — they suggested the correction’s most violent phase is over.
Yet the undercurrents that drove the sell-off haven’t vanished. Long-term yields are still climbing, oil is still bid on Iran tensions, and Apple’s stumble is a reminder that not every mega-cap has an AI growth story to tell. The bottom, if that’s what Thursday marked, was built on two very specific events — one great earnings report and one fund’s forced exit. The question for the weeks ahead is whether the fundamentals can carry the rally now that the mechanical selling is done, or whether 5.2% long-term yields eventually reassert their gravity.
Leave a Reply