Semiconductors lost $1.3 trillion in market value last week.

Semiconductors lost $1.3 trillion in market value last week. The Philadelphia Semiconductor Index dropped 10.8% over 10 sessions, with SOXX down 8% in five days. $INTC fell 21%, $MU 22%, $AMD 8%. Samsung also declined. This is the sharpest sector-wide drop in years.

What stands out is the magnitude and breadth. The decline was driven by nearly everything falling together, suggesting a shift in market psychology and a broader reassessment of the sector's near-term outlook.

Part of the pressure traces to macro: rising bond yields, sticky inflation, and uncertainty around AI's near-term revenue impact. But the underlying story still hinges on demand. The market is asking whether the AI-driven capex cycle can sustain pricing, volume, and margins across memory, compute, and foundry segments.

$MU reports earnings this week. Its guidance will be critical. Memory pricing, inventory levels, and exposure to AI and PC's will all feed into whether this dip is a buying opportunity or the start of a longer correction.

Right now, investors are pricing in lower earnings and applying a lower multiple to future growth assumptions. That kind of de-rating takes time to reverse.

The sector may be overbought relative to near-term fundamentals. Until there's clarity on demand inflection, volatility stays high.

Watch $MU. Then watch capex plans from the cloud providers. That's where the next leg of the story unfolds.

Not financial advice. For informational and educational purposes only.