Nvidia’s swing from +5% to –3% ignites concerns as strong U.S. jobs data erases rate-cut hopes and Ray Dalio says “the picture is pretty clear — we’re in a bubble”
MARKET INSIDER – Wall Street endured one of its most dramatic mood swings of the year on Thursday, as a morning fueled by AI enthusiasm collapsed into an afternoon dominated by bubble anxiety and fading expectations of Federal Reserve rate cuts. By the closing bell, the Nasdaq had plunged 2.16%, reversing a 2.6% early rally, while the S&P 500 and Dow followed the same violent arc—each finishing sharply lower after midday highs.
The catalyst was Nvidia. Shares of the world’s most closely watched AI chipmaker jumped as much as 5% after CEO Jensen Huang and CFO Colette Kress pushed back against bubble concerns and reaffirmed the company’s stunning “half-a-trillion” long-term revenue outlook. But the optimism didn’t last. Nvidia reversed into a 3.2% loss, dragging peers like Oracle and AMD down with it and signaling that investors remain deeply conflicted about how far—and how fast—the AI trade has run.
Then came the macro shock. The U.S. added 119,000 jobs in September, far above expectations of 50,000, sending traders scrambling to reprice the odds of a December Fed cut. According to the CME FedWatch tool, markets now believe the central bank is more likely to hold rates steady—removing a key tailwind for richly valued tech stocks.
“Stretched valuations and one fewer rate cut is a tough combination,” one portfolio manager told Market Insider. Bitcoin added to the gloom, falling to its lowest level since April.
Legendary investor Ray Dalio added fuel to the fire, telling reporter that “the picture is pretty clear” and that markets are in a bubble—though he urged investors not to panic, arguing that nothing has popped yet.
Europe, meanwhile, offered a rare pocket of calm. The Stoxx 600 edged up 0.4%, with AI-linked names like ASML and BE Semiconductor posting gains, even as U.S. markets convulsed.
Behind the day’s drama looms a more complex debate over what the “AI bubble” really means. While Nvidia delivered a blowout quarter, analysts warn the biggest risks lie downstream—particularly among hyperscalers and AI model developers financing massive data-center builds with increasingly expensive debt. “The concern is about companies raising a lot of debt to build data centers,” said Gil Luria of D.A. Davidson. “That’s where the real stress could show up.”
With the holiday season approaching and valuations stretched, investors are now confronting a sobering reality: the AI trade may still have explosive long-term potential, but near-term volatility is only intensifying.
The question for markets heading into December is simple but brutal:
Was Thursday a one-day wobble—or the first crack in an overextended AI story?
