Semiconductor Meltdown — Micron and Sandisk Each Down 14% in Five Sessions, SOX Posts Biggest Drop Since March

The hottest semiconductor winners of 2026 are cracking. Micron and Sandisk have each fallen 14% over five sessions. Intel is down 17%. The SOX index just posted its biggest two-day drop since the March lows. Earnings are record-breaking — so why is the sector falling? Bond yields.

The Philadelphia Semiconductor Index (SOX) recorded its largest two-day decline since the March lows. Despite blowout earnings driven by the AI memory supercycle, rising bond yields are applying heavy valuation pressure on the sector. The 10-year U.S. Treasury yield has surged to 4.61%, its highest level in 12 months.

Five-Session Losses Across Major Semi Names

The AI boom's biggest winners are taking the deepest cuts. Micron (MU) and Sandisk (SNDK) have each fallen 14% over five sessions. Intel (INTC) is down 17%. AMD is off 8%. The SOX index posted its largest two-day drawdown since the March lows.

• Micron (MU): -14% over 5 sessions
• Sandisk (SNDK): -14% over 5 sessions
• Intel (INTC): -17% over 5 sessions
• AMD: -8% over 5 sessions
• SOX index: biggest 2-day drop since March 2026 lows

The Trigger: 10-Year Yield at 4.61%, a 12-Month High

This selloff is not driven by deteriorating fundamentals. Both Micron and Sandisk posted record earnings on the back of AI data center demand. The culprit is the 10-year Treasury yield rising to 4.61% — its highest level in 12 months — amid renewed inflation fears.

High-growth tech stocks are priced on the present value of future cash flows. When the discount rate rises, the present value of distant earnings shrinks — and the effect is amplified the higher the price-to-earnings multiple. Institutional investors respond by rotating into bonds and selling expensive, crowded tech positions.

"While bond yields have been rising, the speed of the adjustment is important and could become a trigger for an equity correction. The surge in government borrowing is an additional factor pushing up longer-dated yields."

Goldman Sachs strategist Peter Oppenheimer

Fundamentals Intact — But Valuation Is the Problem

The fundamentals haven't changed. AI data center investment continues to accelerate. Memory demand — HBM, LPDDR, data center DRAM — remains solid. The issue is that Micron had rallied over 660% from its trough, and Sandisk over 3,370%. That kind of appreciation builds in a lot of future growth, leaving stocks vulnerable to rate-driven de-rating even when earnings beat.

The market's next directional test comes May 20, when Nvidia reports after the bell. If Nvidia delivers strong Q2 guidance, it could provide a near-term catalyst to stabilize the semiconductor sector. A miss — or guidance that merely meets expectations — would likely extend the pressure.

• Micron: +660% from trough, ~PE 7x at trough
• Sandisk: +3,370% from trough, ~PE 8x at trough
• SOX still well above 2026 year-to-date lows
• Next key catalyst: Nvidia Q2 guidance on May 20