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TrustFinance Global Insights
Apr 21, 2026
2 min read
77

Asian stock markets showed mixed performance on Tuesday. South Korea's KOSPI index surged over 2% to an all-time high, driven by strong gains in chipmaker stocks, while broader sentiment remained cautious due to geopolitical uncertainty involving the U.S. and Iran.
The KOSPI's rally was led by SK Hynix, which reached fresh record levels on plans to produce advanced memory modules for AI chips. In Japan, the Nikkei 225 also saw positive momentum, rising 1.3% supported by technology stocks. In contrast, Chinese markets edged lower, with the Shanghai Composite index and CSI 300 both declining by 0.3%. Hong Kong's Hang Seng index remained largely unchanged.
The primary driver for positive sentiment was the ongoing optimism around artificial intelligence, which has significantly boosted technology and semiconductor shares. However, this was counterbalanced by investor concerns over fragile U.S.-Iran diplomatic talks ahead of a ceasefire deadline. The situation has kept oil prices elevated and capped gains across the wider Asian region.
Investors continue to weigh the powerful momentum in the AI sector against external geopolitical risks. Market direction will likely depend on developments in diplomatic talks and their potential impact on global energy markets and regional stability.
Q: Why did South Korea's KOSPI reach a record high?
A: The KOSPI was driven by a rally in chipmaker stocks, particularly SK Hynix, following announcements related to advanced memory production for AI chips.
Q: What is causing caution in the broader Asian markets?
A: Investor sentiment is cautious due to geopolitical uncertainty surrounding U.S.-Iran talks and a nearing ceasefire deadline, which could impact regional stability and energy prices.
Source: Investing.com

TrustFinance Global Insights
AI-assisted editorial team by TrustFinance curating reliable financial and economic news from verified global sources.
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