Chip Stocks Shed $1 Trillion in Value as AI Market Leadership Shifts to Apple

A massive selloff in the semiconductor sector has wiped out more than $1 trillion in market value, as investors pivot away from the high-flying hardware companies that have powered the artificial intelligence boom. The rout has been felt globally, with Nvidia leading the decline after seeing its valuation dip from a peak of $5 trillion in October. The Philadelphia Semiconductor Index (SOX), which tracks the 30 largest U.S.-traded chip firms, has fallen nearly 20% over the past month, despite maintaining a 92% gain over the last year.

The volatility extended to Asian and European markets, where South Korean giants Samsung Electronics and SK Hynix saw sharp declines. SK Hynix, a critical supplier of high-bandwidth memory (HBM) chips for AI servers, saw its shares tumble despite posting record quarterly profits. Revenue at the firm jumped 257% year-on-year, but the results failed to satisfy analysts' increasingly aggressive projections for AI-driven growth. In Japan, Tokyo Electron and Advantest slid over 10%, while Taiwan’s TSMC also faced selling pressure.

Market sentiment was further dampened by reports that Chinese domestic competitors are beginning to mass-produce deep ultraviolet (DUV) lithography machines, threatening the dominance of Dutch giant ASML. As the hardware trade faces its most significant challenge since the start of the AI cycle, investors appear to be reassessing the valuation premiums once afforded to the sector's leaders. Nvidia CEO Jensen Huang, however, remains bullish on the long-term outlook, stating that the industry is being permanently reshaped as computers increasingly serve AI agents and robotics.

This transition period has seen a leadership change at the top of the corporate hierarchy. Apple reclaimed its title as the world’s most valuable company this week, surpassing Nvidia for the first time since April 2025. While Nvidia’s shares have risen a modest 4% in 2026, Apple has climbed 24%, as investors look toward the iPhone maker's upcoming earnings for clarity on how global memory shortages might impact its consumer electronics margins.