Asian stock markets retreated on Tuesday as renewed doubts about the sustainability of artificial intelligence-related valuations weighed on semiconductor names and their suppliers, even after Samsung Electronics reported another quarter of record operating profit.
Broad risk appetite held relatively steady overall, but selling across the AI supply chain dominated trading in the region. Investors reacted to the view that soaring investment in AI infrastructure may not translate into the long-term earnings growth needed to justify the sector's high valuations.
All three major U.S. indexes closed higher overnight, but futures trading in Asia pointed to softer risk sentiment: Nasdaq 100 futures slid about 0.6% while S&P 500 futures were down roughly 0.2% in Asian hours.
Samsung’s strong profit fails to soothe valuation worries
South Korea was at the center of the move. Samsung Electronics reported another quarter of record operating profit, reflecting sustained demand for high-bandwidth memory chips used in AI servers. Nevertheless, the stock fell by more than 8% after the results, and the broader KOSPI dropped 6.9%, leaving it as the region's weakest major benchmark for the session.
Investors have pushed semiconductor shares sharply higher in recent months amid massive commitments by hyperscalers to expand AI infrastructure. That rally has prompted debate about whether future profit growth can keep up with current valuations if those investments slow.
"The fear is that if investments moderate over time, memory demand growth could slow and affect the profit outlook for chipmakers," said Vasu Menon, Managing Director of Investment Strategy at OCBC.
Menon said the focus is shifting from the immediate headline earnings to the durability of peak memory-chip profits and whether hyperscalers ultimately achieve adequate returns on their AI spending. Those questions have pressured sentiment across the semiconductor sector.
Weakness spreads through chipmakers and equipment suppliers
The downturn extended through the semiconductor supply chain. SK Hynix Inc. dropped more than 8% after formally launching the marketing process for a planned U.S. listing on Monday. Japan’s Nikkei 225 tumbled about 1.6%, while the broader TOPIX slipped roughly 0.2%.
Sales pressure reached beyond South Korea. Hon Hai Precision Industry Co Ltd (Foxconn), Nvidia’s largest AI server assembly partner, fell 1.7% despite reporting stronger-than-expected June and second-quarter revenue. Taiwan’s MediaTek declined nearly 3%, and Japan’s Murata Manufacturing Co. tumbled around 8.3%.
The MSCI Asia Pacific Index lost over 1% as declines accumulated across key markets.
Regional markets and commodities
Outside North Asia, markets showed more resilience even as geopolitical uncertainty resurfaced. Brent crude climbed after reports that Iran fired missiles toward commercial vessels transiting the Strait of Hormuz, although gains were limited amid expectations that higher OPEC+ production would help offset supply risks.
Mainland Chinese equities softened, with the Shanghai Shenzhen CSI 300 falling about 1% and the Shanghai Composite down roughly 1.2%. Hong Kong’s Hang Seng eased around 0.4%.
Elsewhere in the region, India’s Nifty 50 opened flat, Indonesia’s Jakarta Composite advanced about 0.4%, and Singapore’s STI gained around 0.7%. By contrast, Australia’s S&P/ASX 200 slipped 0.4% and Malaysia’s KLCI edged down 0.2%.
Focus shifts to inflation and central bank decisions
Attention is moving from corporate earnings toward a heavy calendar of macro data and policy decisions that could influence monetary policy expectations across Asia.
Thailand’s inflation rate slowed to 2.4% in June from 2.8%, with lower energy costs cited as easing price pressures. Investors are also awaiting consumer price data from the Philippines and Taiwan later this week, followed by China’s June inflation report and Bank Negara Malaysia’s policy decision on Thursday.
The Reserve Bank of New Zealand is scheduled to announce its policy decision on Wednesday, with markets widely expecting a 25-basis-point rate increase after policymakers adopted a more hawkish stance in recent months.
Beyond the regional calendar, market participants will parse Wednesday’s Federal Reserve minutes for clues on the committee’s views after softer U.S. labor-market data tempered expectations for further tightening. The start of earnings season will also be watched closely to see whether the AI investment surge continues to translate into corporate profits.
What this means for investors
The session’s price action underscores the market’s sensitivity to the sustainability of AI-driven demand for semiconductors and related hardware. While headline profits can remain strong in the near term, investors are increasingly focused on whether profit margins and growth rates will persist if hyperscaler spending moderates.
In the near term, regional inflation reports and central bank decisions are likely to provide fresh catalysts for market direction, while company-level earnings will be scrutinized for evidence that booming AI investment is translating into durable corporate profitability.