AI Chip Rout Wipes Out $1.3tn as Investors Question Sustainability of Sector’s Historic Rally

A brutal selloff swept through Wall Street's semiconductor sector on Friday, erasing roughly $1.3 trillion in market value and exposing growing investor anxiety that the artificial intelligence-fueled rally, which has powered technology stocks to record highs, may be running ahead of fundamentals.

The downturn hit some of the biggest beneficiaries of the AI boom, with shares of Nvidia, Advanced Micro Devices, Micron Technology, and Marvell Technology suffering steep declines as investors rushed to lock in profits after months of extraordinary gains.

At the center of the selloff was a disappointing earnings report from Broadcom, whose results suggested that demand growth for custom AI chips may not be accelerating as rapidly as investors had anticipated. The report rattled confidence across the semiconductor industry, which has become one of the most crowded trades in global markets.

The benchmark PHLX Semiconductor Index suffered a 10.3% collapse, its worst single-day decline since the market turmoil triggered by the COVID-19 pandemic in March 2020. Combined with Thursday's losses, the index shed 12% in just two trading sessions.

The magnitude of the decline underscores how much investor expectations had been elevated. Semiconductor stocks have been at the heart of a historic AI-driven market surge, propelled by expectations that spending on data centers, advanced computing infrastructure, and artificial intelligence systems would continue rising for years.

Even after the sharp correction, the chip index remains up 73% this year, highlighting the scale of the rally that preceded the selloff.

The biggest blow was absorbed by Nvidia, the dominant supplier of AI accelerators and the poster child of the artificial intelligence revolution. Its shares fell roughly 6%, wiping out more than $300 billion in market capitalization in a single session.

Micron suffered an even steeper percentage decline, tumbling 13% and erasing about $150 billion in value as investors reassessed growth prospects for memory-chip makers amid concerns that expectations had become overly optimistic.

Marvell, which only recently received a high-profile endorsement from Nvidia CEO Jensen Huang as a potential future trillion-dollar company, plunged 17%. AMD lost nearly 11%, while Broadcom extended its post-earnings decline, bringing its two-day loss to almost 20%.

The selloff is seen by some analysts as a reflection of a broader shift in market psychology. For much of the past two years, investors routinely treated pullbacks in AI-related stocks as buying opportunities. That strategy generated enormous returns as capital poured into companies tied to the rapid expansion of AI infrastructure.

Friday's trading suggested that confidence may be becoming less automatic.

"You've had a lot of people here that were just blindly buying the dip," said Dennis Dick, a proprietary trader at Triple D Trading. "Blindly buying the dip had been winning you money, but that ended today."

The pressure on semiconductor stocks was compounded by renewed concerns over interest rates. Stronger-than-expected U.S. employment data reinforced expectations that borrowing costs could remain elevated for longer, reducing the appeal of richly valued growth stocks whose earnings are projected far into the future.

The broader market also felt the impact, with the S&P 500 falling 2.6% as investors reduced exposure to technology shares that have led the market higher throughout the year.

The timing of the correction is particularly noteworthy because it comes just days before what is expected to be one of the most significant public offerings in market history. SpaceX is preparing for a blockbuster IPO that could value the company at approximately $1.75 trillion, adding another high-profile growth stock to a market already heavily concentrated in technology and AI themes.

Some analysts believe the semiconductor selloff reflects a healthy reset rather than a fundamental deterioration in the industry's outlook.

"The semiconductor sector was way overbought. That's why we're seeing the sell-off. I don't think it's the end of the semiconductor bull market," said Ohsung Kwon, chief equity strategist at Wells Fargo.

That view is shared by many investors who continue to see long-term demand for AI infrastructure remaining intact. Global spending on data centers, advanced networking equipment, memory chips, and AI accelerators is still expected to reach unprecedented levels over the coming years as governments and corporations race to build computing capacity.

However, Friday's rout serves as a reminder that even the strongest secular growth stories are vulnerable when expectations become too aggressive.

The AI revolution has created enormous wealth across the semiconductor industry, transforming chipmakers into some of the world's most valuable companies. Yet the sector's violent reaction to a single earnings report illustrates a growing reality for investors: as valuations climb higher and optimism becomes more entrenched, the margin for disappointment becomes increasingly narrow.