Asian stock markets were largely subdued on Wednesday, with investor attention split between improving tanker movements through the Strait of Hormuz and lingering doubts about stretched valuations in technology-related names following a heavy global correction in AI-linked shares.
Market mood and geopolitical flows - Sentiment received a modest lift after reports suggested that tanker traffic through the Strait of Hormuz was gradually returning to normal after a reduction in hostilities between Iran and Israel. Reports that vessels which had been stranded in the Gulf since the outbreak of the conflict were preparing to transit the strategic waterway helped ease some immediate concerns about global crude supplies.
At the same time, investors remained cautious because of the prior session's steep losses in semiconductor and other AI-focused companies, which knocked U.S. equity indexes and left regional bourses trading with limited conviction. S&P 500 futures were effectively flat during Asian hours.
South Korea rebounds amid choppy trading - South Korea's market was the standout performer for the session as the KOSPI rallied 2.2% in volatile trade, clawing back part of a near-10% drop recorded in the previous session - the sharpest one-day fall for the index since March. The bounce was driven by renewed interest in heavily sold technology and semiconductor stocks after the earlier sell-off in AI-linked equities unsettled markets globally.
Still, the recovery remained constrained by a broader unease over lofty AI-driven valuations and questions about long-term returns from the rapidly expanding segment. The country's markets also suffered from a separate headwind after MSCI declined to pursue reclassification of South Korea as a developed market, citing persistent accessibility challenges, particularly in foreign exchange, which contributed to investor skittishness.
Japan slips as BOJ signals further tightening scope - Japan's benchmark Nikkei 225 moved between gains and losses before ending the session down about 0.8%, while the broader TOPIX fell roughly 0.4%. A summary of opinions from the Bank of Japan's June policy meeting added to downward pressure on equities by highlighting that some BOJ policymakers favour additional rate increases following last week's decision to lift the policy rate to 1.0%.
The discussion reinforced expectations that the central bank remains on a gradual path toward policy normalisation as it seeks to guide borrowing costs nearer to what officials view as neutral for the economy. That prospect continued to weigh on rate-sensitive sectors across Japanese markets.
Australia and inflation dynamics - Australia's S&P/ASX 200 finished higher, rising 0.2% after consumer price index data showed headline inflation eased in May from the prior month. However, underlying inflation - as measured by the trimmed mean - increased month-on-month and remained well above the Reserve Bank of Australia's 2% to 3% annual target, suggesting the central bank may stay inclined to tighter policy settings.
The RBA has raised rates by a cumulative 75 basis points in 2026 as it addressed a resurgence in inflation late last year, but it indicated at its June meeting that it would pause to assess the impact of those hikes on the economy.
China and regional bourses - Mainland Chinese stocks were subdued. The Shanghai Shenzhen CSI 300 was little changed, the Shanghai Composite slipped about 0.4%, and Hong Kong's Hang Seng index was flat. In Southeast Asia, Singapore's FTSE Straits Times gained 0.5%, while Malaysia's FTSE Malaysia KLCI and Indonesia's Jakarta Composite each rose roughly 0.6%.
Indonesia's markets remained in focus after MSCI extended a review of the country's classification and warned that a downgrade to frontier-market status was possible if ongoing reforms failed to deliver the necessary improvements.
Context and outlook - The session illustrated how fragile risk appetite remains: signs that energy transit through the Strait of Hormuz was normalising helped ease one source of market stress, but deep-seated concerns about elevated valuations in AI and tech names - amplified by a steep sell-off in related shares - continued to cap gains. Central-bank commentary, particularly from the BOJ, kept attention on the intersection of monetary policy and equity market performance, with rate-sensitive sectors remaining under pressure.
Investors heading into the next sessions will likely watch flows through the Strait of Hormuz, developments in AI and chipmaking sectors, and comment from policymakers for further cues on the durability of the recent rebound.