AI Stocks Lose Over $1 Trillion in Market Value as Nvidia, AMD, and Micron Slide

A global sell-off in artificial intelligence and semiconductor stocks wiped more than $1 trillion in market value from 20 major companies in a single week, with losses deepening on October 14-15, 2026.

In the United States, Nvidia closed down 3.16 percent on October 14 and continued to fall in premarket trading on October 15. AMD and Micron also saw significant declines. CoreWeave, a cloud computing provider with a debt-heavy balance sheet, dropped sharply as investors scrutinized its financing structure.

The sell-off spread globally. South Korean chipmaker SK Hynix fell more than 10 percent. Samsung Electronics dropped 8.73 percent. Japan's SoftBank Group declined 7.9 percent and Advantest fell nearly 14 percent. In Europe, ASML dropped 6.6 percent, ASM International fell 9.6 percent, and Infineon Technologies declined 9.4 percent.

Analysts point to several causes. Hotter-than-expected U.S. inflation data raised fears of additional Federal Reserve rate hikes, pushing Treasury yields above 5 percent and increasing the cost of capital for debt-financed AI infrastructure projects. Investors also grew cautious about the long-term sustainability of massive AI spending.

CEOs of Broadcom and Intel warned that financing AI buildouts could become a bigger headwind than physical constraints like power or chip shortages.

Additional concerns included projections of memory chip oversupply by 2029 and reports of technological advances by Chinese chipmaker ChangXin Memory Technologies.

Some analysts, including Dan Ives of Yorkville Ives, called the pullback a 'financing question' rather than a 'demand question' and suggested the sell-off could be a buying opportunity if no evidence of canceled contracts emerges.