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SK Hynix Falls 15.4% in Record Seoul Plunge — KOSPI Triggers 7th Circuit Breaker of 2026 as AI Memory Unwind Spreads to US Premarket

SK Hynix shares fell 15.4% in Seoul — their worst single-session decline on record — dragging the KOSPI down 8.95% and triggering a 20-minute market-wide circuit breaker, the seventh of 2026. The rout came just one day after SK Hynix's $26.5 billion US ADR debut, as arbitrage selling, a downgraded Q2 profit forecast from Korea Investment & Securities, and renewed US-Iran tensions converged. Micron Technology and the VanEck Semiconductor ETF are both lower in US premarket trading.

SK Hynix Raises $26.5B in Largest-Ever US Foreign IPO at $149 — 7x Oversubscribed Debut Tests AI Memory Bull Case

SK Hynix priced its US IPO at $149 per American depositary receipt, raising $26.5 billion in the largest-ever US listing by a foreign company, surpassing Alibaba's 2014 record. The offering was more than seven times oversubscribed. Trading begins today on Nasdaq under the temporary ticker SKHYV before converting to SKHY on July 13. SK Hynix holds 56.4% of the global high-bandwidth memory market and is a primary HBM supplier to Nvidia, with first-quarter 2026 revenue of $34.9 billion beating estimates by 4%.

Semiconductor Stocks Fall Ahead of SK Hynix Debut — Micron Slides 2.3% as Rotation and Sell-the-News Risk Emerge

Chip stocks declined in Friday's early session ahead of SK Hynix's US trading debut, with Micron Technology slipping roughly 2.3% and the VanEck Semiconductor ETF falling modestly from Thursday's 2.5% gain. Analysts attribute the pullback to rotation — investors rebalancing out of existing chip positions to fund SKHYV allocations — alongside heightened sell-the-news risk after SpaceX's June IPO created a similar dynamic. The Nasdaq composite hovered near flat as markets await the new listing's opening print.

Micron Technology Falls 10.6%, Sandisk Drops 10.6%, Intel Loses 9% — Semiconductor Rout Wipes Out $1T+ in One Session

Micron Technology and Sandisk each plunged more than 10.6% Wednesday while AMD fell 6.9% and Intel sank 9%, as profit-taking in the AI-chip complex erased more than $1 trillion in semiconductor market value. The VanEck Semiconductor ETF lost 5.4%. South Korea's Kospi collapsed 7.89% overnight in response, with SK Hynix down over 12%. Analysts attributed the selloff to valuation fatigue after the sector's extraordinary first-half run rather than any fundamental deterioration.

Semiconductor Stocks Fall 7–9% in Premarket — Rate-Hike Fears and Profit-Taking Hit Micron, SanDisk, Nvidia After Record Q2

Micron Technology fell 7%, SanDisk dropped 9%, and Nvidia shed 2.5% in premarket trading as investors took profits following the best quarter for chips since the sector's inception, with rate-hike fears amplifying the selling. The VanEck Semiconductor ETF gained 82% in the first half of 2026. Thursday's hotter-than-expected PCE print gave traders additional cover to trim exposure in the year's most crowded trade as the second half of 2026 begins.

Micron FQ3 2026 Revenue Quadruples to $41.46B, Beats $35.85B Estimate — Q4 Guided to $50B as HBM Fully Booked Through 2027; MU Gives Back 4.7% on Profit-Taking

Micron Technology reported fiscal Q3 2026 revenue of $41.46 billion, up 346% year-over-year, beating the $35.85 billion consensus by 16%, with non-GAAP EPS of $25.11 topping the $20.78 estimate by 21%. Gross margins hit a record 84.9%, data-center revenue exceeded $25 billion, and Q4 was guided to $50 billion — far above the $43.58 billion analyst forecast. Sixteen multi-year Strategic Customer Agreements locked in roughly $100 billion in contracted revenue. The stock surged 17% Thursday but retreated 4.7% in Friday premarket on profit-taking.

NVIDIA Commits $2 Billion to Nebius in AI Data Center Partnership Targeting 5 Gigawatts by 2030

NVIDIA announced a $2 billion strategic investment in Amsterdam-based AI cloud provider Nebius Group on Wednesday, deepening a partnership aimed at deploying more than 5 gigawatts of NVIDIA-powered AI infrastructure by the end of 2030. Nebius shares surged more than 10% on the news, as the deal reinforces NVIDIA's strategy of investing in companies that purchase its chips at hyperscale.

Bullish Memory Chip Stocks Lead S&P 500 Performers Amid AI Boom

Memory-focused companies such as Sandisk, Western Digital, and Seagate showed significant gains in U.S. markets as AI-driven demand continues to reshape sector valuations. Investors are reallocating capital toward memory and semiconductor stocks benefiting from heightened data center and AI hardware needs, even as broader market performance was mixed.

Applied Digital Shares Tumble After Nvidia Reduces Stake in Sector Context

Applied Digital’s shares fell sharply on Wednesday following a regulatory filing revealing Nvidia’s reduced stake, triggering investor uncertainty. The drop in stock price reflects broader market sensitivity to shifts in major holdings and valuation concerns amid a backdrop of mixed results in the tech sector and ongoing debate over AI spending’s long-term returns.