Key Highlights

  • The Philadelphia Semiconductor index jumped 6.85% to 10,033.93 on November 9, 2026, and iShares Semiconductor ETF (NASDAQ:SOXX) rose 7.49%.
  • The leveraged Direxion Daily Semiconductor Bull 3X fund surged 22.25%, while its inverse counterpart fell 22.27%.
  • AMD gained 13.26%, Broadcom 8.78%, Coherent 16.79%, Monolithic Power 16.60% and Astera Labs 13.72%, while Nvidia fell 4.27% on its board investigation.
  • The rebound followed the worst week for chip stocks in years, driven by fears of tighter AI Data Center regulation after the midterm elections.

What Drove the Rebound

Chip stocks had been the epicentre of the post-election selloff. Investors feared that a Democratic Congress, and voters who rejected 40 of 41 data center ballot measures, would slow hyperscale construction and therefore Demand for processors, memory, networking and power components. On November 9 several forces reversed that mood. Oil fell sharply on Iran peace hopes, easing pressure on rates. A brokerage upgrade of AMD with a USD 600 target revived the AI growth case. Google unveiled two new TPU systems, a reminder that cloud providers are still investing. Asian markets added momentum, with Taiwan's main index up 4.94% and TSMC up 4.7%. Short positioning in the sector was heavy, so covering amplified the move. Last Thursday alone, about USD 2.3 trillion was wiped from the Nasdaq-100, with semiconductors taking the largest share of losses.

Breadth Beyond the Leaders

The advance was broad across the Supply chain. Optical networking, power management and connectivity names led, reflecting where AI data center spending is growing fastest. Coherent, Monolithic Power, Astera Labs, MaxLinear, Vishay and TTM Technologies all gained more than 13%. Technology was the second-best S&P 500 sector at 3.73%. Flows had already turned before the bounce: the leveraged bull semiconductor fund drew about USD 5.0 billion of inflows in the week to November 6, while the inverse fund saw about USD 2.2 billion of outflows, its largest weekly outflow, indicating that traders were positioning for a rebound. Nvidia was the clear exception. Its board investigation into CEO Jensen Huang made it the main single-stock risk in the sector, and it lagged the index by more than 11 points. Memory makers also rallied overseas, with Samsung Electronics and SK Hynix gaining strongly in Seoul on November 10.

Can the Rally Last

The next week will test it. October CPI on November 10 could reset rate expectations, with markets pricing roughly 80% odds of a December Fed hike. CoreWeave reports on November 10 and Applied Materials and Cisco later in the week, giving direct reads on AI Capital spending and equipment demand. Nvidia's results on November 17 are the most important event for the sector. Policy risk is unresolved: lawmakers are focused on chip exports to China after the Nvidia reports, and data center regulation remains a live issue. Valuations remain elevated in AI-linked names even after the selloff. A sustained recovery would need confirmation from Earnings and steady hyperscaler capital spending plans rather than a single relief session. The VIX fell back below 20 on November 9, so lower hedging levels could also magnify any disappointment.

Where Things Stand

Semiconductors staged one of their strongest single-day rebounds of the year on November 9, with the SOX index up 6.85% and SOXX up 7.49%, led by AMD and AI hardware suppliers while Nvidia fell. The bounce followed heavy positioning for a recovery. CPI, a run of AI earnings this week and Nvidia's November 17 report will decide whether it becomes a lasting turn. For SOXX holders, broad participation across the supply chain is a more constructive signal than gains led by one or two stocks.