News confirmed medium confidence

Early-July AI-chip selloff: Micron/Sandisk −10.6% (Jul 1); Samsung record profit, stock −7% (Jul 7–8); KOSPI circuit breaker

July 1: Micron and Sandisk each fell 10.6% (−14% over five sessions); SOX fell up to 6% in a session after an 88% Q2 rally. July 7–8: Samsung posted preliminary Q2 operating profit ~₩89.4T (~1,800% YoY) but shares fell ~7% (revenue ₩171T mi

On 2026-07-01, the verified AI news record added a significant chips, cloud & infrastructure development: July 1: Micron and Sandisk each fell 10.6% (−14% over five sessions); SOX fell up to 6% in a session after an 88% Q2 rally. July 7–8: Samsung posted preliminary Q2 operating profit ~₩89.4T (~1,800% YoY) but shares fell ~7% (revenue ₩171T missed ₩172.2T consensus); KOSPI fell ~10% intraday, tripping circuit breakers; Samsung/SK Hynix −9–12%. A June 26–27 pre-window selloff had already erased ~$1.3T in chip market cap.

Context

July 1: Micron and Sandisk each fell 10.6% (−14% over five sessions); SOX fell up to 6% in a session after an 88% Q2 rally. July 7–8: Samsung posted preliminary Q2 operating profit ~₩89.4T (~1,800% YoY) but shares fell ~7% (revenue ₩171T missed ₩172.2T consensus); KOSPI fell ~10% intraday, tripping circuit breakers; Samsung/SK Hynix −9–12%. A June 26–27 pre-window selloff had already erased ~$1.3T in chip market cap. Catalysts cited: SK Hynix HBM-slowdown reports, Meta Compute oversupply signal, Samsung revenue miss, hawkish Fed under new Chair Kevin Warsh, hedge-fund profit-taking. Hyperscaler 2026 capex guidance (~$725B combined, +77% YoY) unchanged — framed as valuation reset, not demand collapse.

What changed

July 1: Micron and Sandisk each fell 10.6% (−14% over five sessions); SOX fell up to 6% in a session after an 88% Q2 rally. July 7–8: Samsung posted preliminary Q2 operating profit ~₩89.4T (~1,800% YoY) but shares fell ~7% (revenue ₩171T missed ₩172.2T consensus); KOSPI fell ~10% intraday, tripping circuit breakers; Samsung/SK Hynix −9–12%. A June 26–27 pre-window selloff had already erased ~$1.3T in chip market cap. According to GoodWhale; TruthsAndNews; FAQ.com.tw; Intellectia, the supporting record states: “On Wednesday July 1, Micron and Sandisk each dropped 10.6% in a single session… The Philadelphia Semiconductor Index (SOX) — which had rallied an extraordinary 88% in the second quarter — fell as much as 6% in one session.”.

Why it matters

Catalysts cited: SK Hynix HBM-slowdown reports, Meta Compute oversupply signal, Samsung revenue miss, hawkish Fed under new Chair Kevin Warsh, hedge-fund profit-taking. Hyperscaler 2026 capex guidance (~$725B combined, +77% YoY) unchanged — framed as valuation reset, not demand collapse. The infrastructure angle is material because AI deployment depends on power, chips, networking, cooling, and capacity commitments as much as on model quality.

Details

The research file records the item under “Early-July AI-chip selloff: Micron/Sandisk −10.6% (Jul 1); Samsung record profit, stock −7% (Jul 7–8); KOSPI circuit breaker” with source timing of July 1–13, 2026. The captured research confidence note is: Confirmed market news / High (moves), Medium (catalyst attribution). Additional captured source links are listed below so readers can inspect the evidence trail rather than rely on a single summary. Catalysts cited: SK Hynix HBM-slowdown reports, Meta Compute oversupply signal, Samsung revenue miss, hawkish Fed under new Chair Kevin Warsh, hedge-fund profit-taking. Hyperscaler 2026 capex guidance (~$725B combined, +77% YoY) unchanged — framed as valuation reset, not demand collapse.

Limitations and caveats

This item is based on a single authoritative source or a company-attributed claim captured in the research file; independent corroboration was not established in the research window.

Sources

Update note: Last reviewed 2026-07-22. Next checkpoint: monitor official channels and the linked source record.

Sources

Drafted with AI assistance from source briefs; reviewed for citation completeness and label accuracy.