AI chip stocks just had their worst week in over a year, wiping out more than $1 trillion

[StringTheory95]

Semiconductor stocks slid sharply this week, with the Philadelphia Semiconductor Index falling roughly 20 percent from its record high and posting its worst week since April 2025, erasing more than a trillion dollars in combined market value across the sector. TSMC fell more than 3 percent Friday despite reporting second quarter profit and revenue that beat expectations, purely because the company also announced higher planned capital expenditure than previously forecast, reviving investor anxiety about whether AI spending has outrun what current demand can actually support

Even Nvidia, still the dominant leader in AI chips, slid roughly 1.4 to 2 percent as the broader Nasdaq dipped 1.2 percent and the S&P 500 fell nearly 0.9 percent on the same day. Applied Materials, Lam Research, Intel, KLA Corp and Arm Holdings each fell around 4 percent, and the selloff spread to European chip names too, with ASML, STMicroelectronics and Infineon all trading meaningfully lower as Asian markets sold off first overnight

Sentiment took an additional hit from the surprise debut of Kimi K3, the new Chinese model from Moonshot AI that industry evaluators say rivals leading American systems, since a genuinely capable, cheap open source alternative threatens the pricing power that's underpinned a lot of the sector's valuation story. Separately, reports that Google's Gemini 3.5 Pro launch would be delayed further and a re-escalation of tension between the US and Iran added to a broadly risk averse mood across markets that week

Analysts remain split on how seriously to read into the drop. Some frame it primarily as profit taking after an enormous run up, noting Micron is still up roughly 197 to 209 percent this year alone and Sandisk has climbed over 470 percent, meaning even a sharp pullback still leaves most of these stocks well above where they started 2026. Others point to a genuine structural threat emerging from custom silicon, with OpenAI partnering with Cerebras on July 8 to build chips specifically designed to challenge traditional GPU architectures, and Amazon shipping its own custom AI accelerators, adding real competitive pressure to Nvidia's near monopoly that goes beyond simple market jitters or short term rate anxiety

What to know about the AI chip stock selloffabcnews.com

[WWEHarry78]

TSMC actually beating earnings expectations and still selling off purely because of higher planned capex is such a clean example of how nervous the market has gotten about AI spending sustainability specifically