Semiconductor Stocks Plunge 20-30% as AI Trade Faces Stress Test

The semiconductor sector is experiencing its sharpest correction in years, with major chipmakers losing between 20% and 33% of their value since late June, according to analysis first reported by Axios.

The iShares Semiconductor ETF (SOXX), which tracks 30 industry stocks, has fallen 20% from its June 22 record high. Intel suffered the steepest decline at 33%, while Micron dropped nearly 30%. Nvidia, the sector's early leader, proved more resilient with a modest 3% decline over the same period.

Why it matters

Semiconductor companies supply the fundamental infrastructure for artificial intelligence systems. Their stock performance serves as a leading indicator for investor confidence in the broader AI buildout, which has driven trillions in market capitalization gains across technology sectors. A sustained downturn could signal cooling enthusiasm for AI capital expenditures among hyperscale cloud providers.

Context behind the selloff

The decline follows an extraordinary run-up earlier in 2026. Despite recent losses, SOXX remains up 66% year-to-date, while Micron has gained 169% and Intel 141%. These companies manufacture the chips powering massive AI infrastructure investments by major cloud providers.

"The stocks got to extremes," John Roque, head of technical analysis at 22V Research, told Axios. "I think what we're seeing now is a correction. It's as rash now on the downside as it was rash on the upside."

Steve Sosnick, chief strategist at Interactive Brokers, characterized the moves as "parabolic" and "incredibly rare," noting they "tend to end unpredictably and in an ugly manner."

Warning signs emerged earlier

Market observers identified early indicators of weakness. Nvidia's stock declined following strong May earnings, and Samsung experienced similar post-results selling. South Korea's KOSPI index, heavily concentrated in Samsung and SK Hynix (which together represented nearly half its market value), has entered bear market territory after triple-digit percentage gains.

Uncertainty over AI returns

Christopher Wood, global head of equity strategy at Jefferies, noted growing investor uncertainty about which hyperscale companies will actually profit from record AI spending. "The new quarter has begun with much talk of 'AI fatigue' as investors look out for a peaking out of momentum," he wrote.

New competitive pressure from Chinese open-source AI models has added to concerns about the durability of current AI investment trends.

What comes next

Financial reports from Alphabet and Intel this week will provide critical data points for assessing the health of AI infrastructure spending. The broader U.S. market has remained relatively stable as investors rotate into other equities, but semiconductor concentration remains a focal point.

These details were first reported by Axios.