Asian semiconductor stocks tumbled sharply on Tuesday as investors questioned lofty valuations across the sector amid two converging concerns: doubts about the sustainability of AI infrastructure financing, and reports that Chinese companies are developing domestic deep ultraviolet lithography machines that could allow Chinese memory chipmakers to accelerate capacity expansion and intensify global competition. Samsung Electronics closed 13.4% lower in Seoul, notching its worst single-day fall in almost two decades, while SK Hynix dropped 14.7%. Together the two stocks account for nearly half the benchmark KOSPI index, which closed down 10.8%, marking its biggest one-day decline since the early days of the U.S.-Iran conflict in March.
The Korean rout spread across the region. Japan's Nikkei 225 dropped as much as 4% to its lowest level since May 22, while the broader Topix fell as much as 2.7%. Taiwan's TSMC closed nearly 3% lower. Mainland China's tech-heavy ChiNext 300 index fell 6.49%, and the Hang Seng China Semiconductor Chips Index dropped 7.02%. Japanese flash memory maker Kioxia Holdings slumped 18.3%, and Taiwanese chip designer MediaTek fell almost 10%.
In Europe and U.S. premarket trading the damage continued. ASML fell more than 8% on Monday after The Information reported that a Chinese company is manufacturing an immersion DUV lithography machine, an area where ASML dominates. On Tuesday, U.S. semiconductor names fell further in premarket trading: Nvidia was down around 1.2%, Intel and AMD were each more than 3% lower, and Micron dropped nearly 5%. Analysts noted that SK Hynix, as a key supplier of high-bandwidth memory chips to Nvidia, is especially sensitive to shifts in AI-sector sentiment.
The broader stock market context adds to the unease. Alphabet's second-quarter report last week revealed that heavy AI capital expenditure pushed free cash flow to negative $5.9 billion, its first negative quarter since the company's 2004 IPO. That sparked a re-evaluation of whether the hyperscaler spending boom can sustain the memory and chip pricing that has driven the sector's gains. With Microsoft, Meta, Amazon, and Apple all reporting earnings later this week, operators and investors are watching closely for any updates on AI capital spending plans.
The Federal Reserve opened its July 28-29 meeting Tuesday, with the policy decision due Wednesday at 2:00 p.m. ET and Chair Kevin Warsh's press conference at 2:30 p.m. The benchmark federal funds rate has stood at 3.50-3.75% through all four prior 2026 meetings, and market pricing strongly favors another hold. The July meeting carries no Summary of Economic Projections or dot plot, making Warsh's forward guidance language the primary market signal to watch.
Crude oil prices fell sharply earlier in the week after the U.S. and Iran agreed to pause military strikes, with Brent futures dropping toward the mid-$80s to low-$90s range. However, Kiplinger's live Fed coverage noted that oil is still up roughly 20% for July, keeping near-term headline inflation hot. Analysts flagged that shipping risks through the Strait of Hormuz and ongoing Red Sea disruption mean energy markets remain exposed to fresh geopolitical headlines.
Reports that a Chinese company is manufacturing an immersion deep ultraviolet lithography machine, an area dominated by Dutch semiconductor equipment maker ASML, triggered an 8%-plus drop in ASML shares and amplified the broader chip-sector selloff. The development reignited long-standing concerns that Chinese chipmakers could accelerate domestic capacity expansion, intensifying competition in global memory markets. Analysts at Kiwoom Securities noted the DUV report added to existing worries about AI infrastructure financing and peak-cycle valuations in the memory sector.
Microsoft, Meta, Amazon, and Apple are all scheduled to report quarterly earnings later this week, and investors are closely watching AI capital expenditure guidance after Alphabet's Q2 report last week showed capex raising full-year 2026 guidance to a record $195 billion to $205 billion and pushing quarterly free cash flow to negative $5.9 billion. Deutsche Bank strategist Parag Thatte said concerns around AI-related capital expenditures are overshadowing an otherwise strong earnings season, with S&P 500 companies on track for roughly 38% year-over-year earnings growth in Q2 according to FactSet.
The International Monetary Fund's July World Economic Outlook declared that global disinflation has stalled, projecting headline inflation will rise to 4.7% in 2026 from 4.1% in 2025. The revision reinforces the higher-for-longer rate narrative at the Federal Reserve and other major central banks. For small and mid-sized businesses, the implication is that borrowing costs are unlikely to ease soon, and input cost pressures from energy and commodities remain a persistent budget risk.
A coalition of 12 states led by California obtained a temporary restraining order earlier this month pausing the Paramount-Warner Bros. Discovery merger, with a hearing on a preliminary injunction set for August 3. The states allege the deal would reduce competition in cable and theatrical markets. The case has broader implications for media consolidation and for the FCC license-transfer process, as Paramount holds broadcast licenses for 28 local television stations.
Private equity firm BC Partners agreed to acquire a stake in InfoRLife, a pharmaceutical company valued at approximately $1.5 billion, according to Bloomberg reporting appearing on the outlet's homepage Tuesday. The deal is part of a broader wave of private equity activity in pharma, where buyers facing major patent cliffs and rich public valuations have increasingly turned to privately held specialty drug firms.
Singapore Airlines reported a quarterly loss, citing elevated jet fuel prices u2014 a legacy of the extended U.S.-Iran conflict and Middle East shipping disruptions u2014 and intensifying competition from Air India. The result is a reminder that energy cost volatility is still working through income statements in fuel-intensive industries even after the recent oil price pullback.
The Fed is almost certain to hold rates at 3.50-3.75% when it announces Wednesday, but Chair Warsh's commentary on the inflation outlook matters more than the decision itself. With the IMF now projecting global inflation rising to 4.7% this year and domestic oil prices still up roughly 20% for July, there is little room for borrowing cost relief in the near term. Businesses carrying variable-rate debt or planning capital expenditures should plan around rates staying where they are through at least the fall.
The global semiconductor selloff is a signal worth watching beyond the stock market. If AI hyperscalers face investor pressure to slow capital spending, downstream demand for servers, networking gear, and the cloud services that many small businesses rely on could be affected. This week's earnings from Microsoft, Meta, and Amazon will either confirm or ease that concern. Meanwhile, the emerging Chinese DUV challenge is a longer-term supply-chain story: if Chinese chipmakers can expand memory production domestically, memory prices over a multi-year horizon could soften, which would reduce one input cost for tech-intensive businesses.