S&P 500, Nasdaq Gain as Chips and AI Stocks Stage Week-Long Rebound

U.S. large-cap indexes extended gains on July 10, 2026 as semiconductor and artificial-intelligence stocks recovered from an early-quarter sell-off, with the S&P 500 adding 0.09% and the historic Nasdaq debut of South Korean memory giant SK Hynix anchoring investor sentiment.

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What Happened

The week began with a sharp reversal after an extraordinary second quarter in which the Philadelphia Semiconductor Index (SOX) had climbed 87.8% — the index's strongest quarterly performance since records began in 1994. An early-July selloff trimmed the SOX by 6.3%, with KLA Corporation falling 12%, Lam Research off 9.7%, and Applied Materials losing 10% in a single session. Micron Technology (MU) and Sandisk (SNDK) each dropped 10.6%. The catalyst: reports that Meta Platforms planned to monetize excess data center capacity by selling cloud computing services to third parties, prompting concern that AI infrastructure spending may be approaching a near-term ceiling.

The rebound arrived swiftly. By July 6, the S&P 500 had recovered 0.7% and was trading within 1% of its all-time high, with the Nasdaq Composite jumping 1.1%. Broadcom (AVGO) led the charge, rising 3.7% after announcing long-term silicon agreements with Apple, reinforcing confidence in contracted AI chip revenue. The recovery continued through July 8–9, with Micron surging 4.5%, Sandisk adding 7.6%, and Applied Materials gaining 3.2%. The VanEck Semiconductor ETF (SMH) climbed 2.5% on July 9 alone. NVIDIA (NVDA) added 3.65% to close at $204.12; Broadcom settled at $388.69, up 4.83%, extending a five-session recovery after selling off roughly 15% following its June earnings report.

Market Reaction

On July 10, markets steadied rather than accelerated. The S&P 500 rise measured 0.09%; the Dow Jones Industrial Average gained 0.31%; and the Nasdaq Composite slipped 0.02% as investors rotated modestly into small-caps, with the Russell 2000 rising 1.22%. Semiconductor stocks were mixed ahead of the SK Hynix debut, with Micron pulling back 3.2% in early trading after its multi-session run. The Information Technology Select Sector SPDR (XLK) and Energy Select Sector SPDR (XLE) remained among the two sectors posting positive closes on the broader index, with most other S&P sectors finishing in the red.

The narrow breadth underscores a pattern that has defined 2026's equity rally: Nasdaq Composite gains are disproportionately concentrated in a handful of AI-linked mega-caps, even as smaller stocks and cyclical sectors lag.

SK Hynix and the HBM Market

The SK Hynix listing is the week's most structurally significant event. The company controls approximately 58% of the global high-bandwidth memory (HBM) market — the specialized chip that enables NVIDIA's H200 and Blackwell-series GPUs to process AI workloads at scale. Until this week, U.S. investors seeking direct exposure to HBM had to navigate Seoul-listed shares, facing currency risk and liquidity constraints. The Nasdaq ADR closes that gap.

SK Hynix's offering attracted demand more than seven times its available float. Annual revenue nearly tripled between 2023 and 2025, reaching approximately $65 billion; analysts polled by LSEG project revenue to more than triple again to $235 billion in 2026 as HBM shipments expand. The ADR's 2.7% opening premium signals that institutional buyers treated $149 as a conservative entry.

Strategic Context

The rebound reflects a fundamental tension that will define semiconductor markets through year-end. On one side, AI infrastructure investment by Microsoft, Google, Amazon, and Meta remains at record pace, with quarterly capex from the four companies collectively running in the tens of billions. Global semiconductor sales are projected to reach $975 billion in 2026, with AI-dedicated chips accounting for roughly $500 billion of that total — a figure that would have been unthinkable three years ago.

On the other side, Chinese technology firms are accelerating adoption of domestically designed AI chips as alternatives to NVIDIA hardware, compounding export-control headwinds for U.S. suppliers. That dynamic, combined with high valuations after the SOX's 87.8% second-quarter surge, is likely to keep volatility elevated even as the underlying demand cycle remains intact. AMD has emerged as a notable beneficiary of portfolio diversification, gaining 130% year-to-date versus NVIDIA's more modest advance, as hyperscalers diversify their GPU supply chains.

AI and Technology Angle

The sell-off and recovery cycle illustrates how tightly AI stock prices are linked to narratives about capital-expenditure durability. When Meta's cloud-services announcement suggested that data center buildout might slow, the semiconductor complex repriced in hours. When Broadcom's Apple agreement and SK Hynix's oversubscribed listing signaled continued long-cycle demand, the same stocks recovered within days. The speed and amplitude of the swings reflect the degree to which AI infrastructure is now the market's central risk asset — a role previously occupied by energy, housing, and financial stocks in prior cycles.

Outlook

The semiconductor stock rebound of July 6–10 demonstrates that institutional conviction in the AI-infrastructure thesis remains high, even as near-term catalysts — including China competition, valuation multiples, and data-center monetization timelines — generate periodic sell-offs. SK Hynix's Nasdaq debut broadens the investable universe for U.S. buyers seeking direct HBM exposure, and its $26.5 billion capital raise signals sustained confidence in memory-chip demand driven by AI workloads. With the S&P 500 within striking distance of its all-time high and the SOX up 47% year-to-date, the path forward hinges on whether hyperscaler capex guidance holds through second-quarter earnings season, which begins in earnest next week.