Semiconductor stocks have tumbled this week amid concerns that record AI capital spending cannot be sustained, erasing roughly $1.3 trillion（約210兆円） in market value. The decline is driven not by falling demand, but by doubts about returns on AI infrastructure investment, dot-com-level valuations, and a more hawkish Federal Reserve outlook. While Wall Street's long-term price targets still suggest upside for most chip stocks, price-cutting pressure on AI providers and Meta's move to sell excess computing capacity are weakening the bull case.
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Semiconductor stocks fell sharply this week—the Philadelphia Semiconductor Index dropped 10.8%, the VanEck Semiconductor Index fell 13% over ten sessions, and the iShares Semiconductor ETF is down 8% in a single week. Reuters estimates roughly $1.3 trillion（約210兆円） in semiconductor market value has been wiped out, with Intel, Micron, AMD, and Samsung all under pressure.
Why it matters
The selloff reflects Wall Street's doubts about whether hyperscalers' 67% jump in AI capital expenditures to $650 billion（約100兆円） can sustain returns, especially as enterprises seek to limit their budgets for AI chatbot use and high-priced AI providers face pressure to lower prices. Concerns about dot-com-level valuations and a more hawkish Federal Reserve stance have amplified the decline, putting publicly listed chip makers at risk of reduced capital spending.
What to watch
Wall Street's 12-month price targets still imply substantial upside for most semiconductors—Nvidia up 56% and Micron up 66%—but cracks are appearing as price-cutting pressures mount. Key earnings reports from TSMC (July 16) and Intel (July 23) will be closely watched to see whether leading chipmakers can exceed analysts' high expectations and stabilize the sector.
Semiconductor stocks are experiencing a sharp reversal after months of gains tied to AI infrastructure buildout. The immediate trigger is a confluence of concerns: Wall Street is reassessing whether the $650 billion（約100兆円） in AI capital expenditures announced by hyperscalers can deliver sufficient returns, especially as enterprises actively seek to constrain their AI spending and pricing pressure hits major AI service providers such as OpenAI and Anthropic. This has exposed an uncomfortable gap between sky-high valuation expectations and the fundamentals companies can actually deliver—exemplified by Samsung's report of record operating profit that still disappointed Wall Street because it failed to exceed expectations and revenue growth fell short of views.
The broader backdrop includes two additional headwinds: a more hawkish Federal Reserve outlook that could raise interest rates to combat inflation, and evidence of competitive pressure from Meta's plan to rent out excess AI computing capacity. These factors together have sparked a reassessment of the chip sector's near-term growth runway. Notably, hedge funds have also profited from shorting semiconductor stocks for the past month, adding momentum to the decline.
However, the bull case remains intact for now. Second-quarter 2026 semiconductor earnings are expected to grow 131%, and supply of high-bandwidth memory—the key driver of recent gains—is sold out through most of 2027, according to CNBC. The question now is whether earnings beats from industry giants like TSMC and Intel in mid-to-late July can restore confidence or confirm that valuations have run too far ahead of reality.
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