Nasdaq Falls 2.2% as AI Optimism Meets Semiconductor Selloff
The Nasdaq Composite dropped 2.21% to 26,113.17 on October 21, 2026, despite positive AI earnings from SpaceX and Super Micro. The decline was driven by sharp losses in semiconductor stocks like Lam Research (-9.46%) and TTM Technologies (-25.75%). The S&P 500 fell 1.38%, while the VIX spiked 14.03% to 19.02, indicating rising market volatility.
Key points
- Nasdaq Composite closed at 26,113.17, down 2.21%.
- S&P 500 closed at 7,650.21, down 1.38%.
- Dow Jones Industrial Average closed at 52,545.48, down 0.59%.
- Lam Research fell 9.46% to $236.14.
- TTM Technologies plunged 25.75% to $75.85.
- Meta Platforms dropped 6.32% to $653.44.
Background
This session follows a volatile period for U.S. equities. On October 9, 2026, markets ended the week with gains as investors anticipated third-quarter earnings, with the Nasdaq up 0.64%. Prior to that, in late September, AI stocks rebounded, pushing the Nasdaq to record highs, though analysts noted a divergence where more stocks hit 52-week lows than highs. The current drop contrasts with the previous day's Asian market rebound, which was fueled by strong AI earnings from SpaceX and Super Micro, as noted in the October 21 archive entry.
Why it matters
The divergence between strong AI earnings and broad market declines highlights investor caution regarding semiconductor valuations and broader tech sector risks. The spike in the VIX and drop in tech-heavy indices suggest a shift from risk-on to risk-off sentiment, potentially signaling a rotation into defensive sectors like defense (Lockheed Martin) and consumer staples (Procter & Gamble).
What to watch
Investors will monitor whether the semiconductor selloff continues or if the positive AI earnings from SpaceX and Super Micro can stabilize tech stocks. Attention will also turn to oil prices, which rose 1.18% to $98.30, and their impact on inflation expectations and Treasury yields.
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