Global Markets Fall as AI and Technology Stocks Witness Major Sell-Off

A chip-led rout swept from Wall Street to Seoul as AI bubble fears and Fed rate worries hit tech, with the Nasdaq down 2.2% and Korea's Kospi triggering a circuit breaker.

By Naina, 24th June 2026

Global markets fell sharply this week as AI and technology stocks suffered a major sell-off, with mounting fears of an artificial-intelligence bubble dragging indices from Wall Street to Asia. On Tuesday, 23 June 2026, the tech-heavy Nasdaq Composite dropped about 2.2 percent and the S&P 500 fell 1.4 percent, while South Korea's Kospi collapsed close to 10 percent, triggering a circuit breaker. Investors dumped semiconductor and AI-linked shares on worries that the enormous sums poured into AI infrastructure may not deliver the profits promised, echoing the dot-com era. The Dow, with fewer tech names, held roughly flat.

The rout was global and chip-driven. It began on Wall Street on Monday, swept through Asia and Europe, and rebounded back to the United States. Memory-chip makers were hit hardest, while the so-called Magnificent Seven tech giants slid as investors rotated out. Yet many analysts framed the move as a long-overdue correction rather than the start of a crash, pointing to strong earnings and ample liquidity. Here is what drove the sell-off, who was hit hardest, and how worried markets should be.

The Scale of the Sell-Off

The numbers capture a broad risk-off move. The Nasdaq Composite fell about 2.2 percent to close near 25,587, extending a 1.3 percent drop the day before, while the S&P 500 lost 1.4 percent. The Dow Jones Industrial Average, weighted toward non-tech names, ended barely changed as stocks like Caterpillar rose. The fear gauge told the story: Wall Street's VIX jumped nearly 13 percent. Even so, the Nasdaq remained only about 5.5 percent below its record high set on 2 June and was still up roughly 10 percent for the year, a reminder of how far it had climbed.

The Chipmakers in the Eye of the Storm

Semiconductors bore the brunt. In Asia, South Korea's SK Hynix and Samsung Electronics both tumbled more than 12 percent, dragging the Kospi down nearly 10 percent and forcing a trading halt. In the United States, memory-chip maker Micron fell sharply and Nvidia dropped around 4 percent. Europe was not spared, with STMicroelectronics and Dutch equipment maker ASMI each falling more than 7 percent. Because memory chips sit at the heart of the AI build-out, any doubt about AI demand hits them first and hardest.

The Magnificent Seven Under Pressure

The mega-cap tech leaders that powered the rally also retreated. Alphabet suffered its worst single day in more than a year, falling about 5 percent, while Amazon and Meta extended losses. Elon Musk's SpaceX, freshly listed, dropped 16 percent in a single session, briefly erasing its post-IPO gains before stabilising. The pullback reflected investors rotating out of the handful of stocks that have dominated returns, a concentration that has left indices unusually exposed to any wobble in sentiment toward AI.

The Asian and European Spillover

The sell-off underscored how globalised the AI trade has become. Japan's Nikkei 225 fell about 3.6 percent, snapping eight straight gains, and SoftBank, a major AI investor, dropped 15 percent. Europe's Stoxx 600 shed around 1 percent, with its technology sub-index down 3 percent. The pattern was telling: a slide that started in US tech rippled almost instantly across time zones, battering chip stocks worldwide before circling back. Indian markets were caught too, with the Nifty slipping below 24,000 amid the global weakness.

The AI Bubble Fear

At the core of the anxiety is a single question: will the trillions being spent on AI pay off? By mid-2026, AI-related companies accounted for roughly 80 percent of the US market's gains, and the five largest tech firms made up about 30 percent of the S&P 500's value, the highest concentration in half a century. Capital spending on AI infrastructure has soared without clear evidence of matching profits, and valuation gauges like the Shiller price-to-earnings ratio have pushed past levels historically associated with market tops. That imbalance is what has investors nervous.

The Fed Factor

Interest rates added fuel. The Federal Reserve's June projections pointed to stickier inflation, with a preferred price gauge running well above target, and signalled the federal funds rate could sit near 3.8 percent for the year, higher than markets had hoped. Elevated rates hurt high-growth tech stocks the most, because their value rests on earnings far in the future, which are worth less when discounted at higher rates. With the Middle East conflict easing after a ceasefire, investors swung their focus back to the Fed and to stretched AI valuations.

The Case for Calm

Not everyone sees catastrophe. Several market veterans called the move a healthy correction after a powerful run, citing abundant liquidity and strong corporate earnings. One asset manager said markets were nowhere near a catastrophic failure, arguing AI will keep growing company profits for years. Another likened the AI build-out to an early innings of a long game, with periodic gut-check moments along the way. By Wednesday, the Kospi had bounced back about 3 percent and Samsung had recovered much of its loss, suggesting the plunge was a dip rather than a turning point.

The Risks That Remain

The bears have a case too. Ratings agencies have warned that AI-driven exuberance is creating systemic risks, with valuations stretched thin and returns concentrated in a few names. If AI revenue disappoints or the Fed stays hawkish, the unwinding could deepen. The market's heavy reliance on a small group of mega-caps means a stumble in any one of them can drag whole indices down. Some investors are already hedging, with one major bank launching an AI-free version of the S&P 500 for those wary of the trade.

The Road Ahead

This week's global sell-off in AI and technology stocks is a reminder of how much rests on a single theme. Whether it proves a passing wobble or the start of a deeper reset will depend on upcoming earnings, the Fed's next moves, and evidence that AI spending is translating into profit. For now, the picture is one of nervous consolidation rather than collapse, with strong fundamentals tugging against stretched valuations. Investors are likely to face more of these gut-check moments before the AI trade settles. This is analysis, not investment advice.

Frequently Asked Questions

Why did global markets fall this week?
A sell-off in AI and technology stocks, driven by fears of an AI bubble and worries about higher US interest rates, spread from Wall Street across Asia and Europe, hitting semiconductor and mega-cap tech shares hardest.

How much did the indices drop?
The Nasdaq fell about 2.2 percent and the S&P 500 1.4 percent on Tuesday, while South Korea's Kospi plunged close to 10 percent and Japan's Nikkei lost around 3.6 percent. The Dow, with fewer tech names, was roughly flat.

Which stocks were hit hardest?
Memory-chip makers SK Hynix, Samsung, and Micron fell sharply, Nvidia dropped around 4 percent, and mega-caps including Alphabet, Amazon, and SpaceX declined.

What is the AI bubble fear?
It is the concern that the huge investment in AI infrastructure may not generate the expected profits, leaving valuations, concentrated in a handful of tech giants, unsustainably high, echoing the dot-com era.

Is this the start of a crash?
Most analysts call it a correction rather than a crash, citing strong earnings and ample liquidity, and Asian markets bounced back the next day. But stretched valuations and rate risks mean further volatility is likely.