Asian stock markets traded mostly flat to lower on Tuesday as investor sentiment weakened amid escalating U.S.-Iran tensions and slowing momentum in technology shares. Concerns over global inflation, geopolitical risks, and uncertainty surrounding chip demand weighed on regional equities, while traders also awaited key U.S. inflation data for further market direction.
South Korea’s KOSPI index emerged as the region’s weakest performer, dropping sharply after recently reaching record highs. The benchmark index briefly touched another all-time high in early trading before reversing course as investors rushed to lock in profits from the recent technology rally. Major semiconductor companies led the losses, with Samsung Electronics sliding nearly 4% and SK Hynix experiencing volatile price swings throughout the session.
The decline in Korean chip stocks comes after months of strong gains fueled by optimism surrounding artificial intelligence-driven demand for memory chips. However, growing concerns over a potential labor strike at Samsung Electronics added pressure to the sector. Samsung is currently engaged in negotiations with its largest labor union ahead of a planned strike scheduled for May 21, raising fears of disruptions to global memory chip production during a period of strong semiconductor demand.
Elsewhere in Asia, Japan’s Nikkei 225 and TOPIX indexes posted modest gains despite increasing expectations that the Bank of Japan may continue tightening monetary policy. Investors reacted to recent BOJ meeting summaries that revealed a more hawkish stance among policymakers.
Chinese markets remained largely subdued, with the Shanghai Composite and CSI 300 trading flat, while Hong Kong’s Hang Seng Index recorded mild gains. Market participants are closely monitoring the upcoming meeting between U.S. President Donald Trump and Chinese President Xi Jinping, as both leaders are expected to discuss trade and geopolitical tensions affecting global markets.
Meanwhile, Australia’s ASX 200 declined as weakness in technology shares dragged the broader market lower. India’s Nifty 50 futures also pointed downward following recent losses tied to concerns about fuel shortages and rising oil prices linked to the Iran conflict.
Global investors remain cautious as rising oil prices continue to fuel inflation concerns and uncertainty across financial markets in 2026.


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