Asian Markets Cautious as Iran Deal Optimism Fades; BOJ Raises Rates to 31-Year High

Asian stock markets posted modest gains on Tuesday as investors adopted a cautious stance following a strong rally sparked by news of a U.S.-Iran peace deal. Market attention shifted from geopolitical developments to central bank policy decisions, particularly the Bank of Japan’s widely anticipated interest rate increase.

Regional markets had surged in the previous session after reports of a preliminary agreement between Washington and Tehran raised hopes of easing tensions in the Middle East and restoring stability to global energy supplies. However, investor enthusiasm cooled as questions remained about the implementation of the deal and the timeline for resuming normal shipping activity through the Strait of Hormuz. Oil prices, which had fallen sharply on expectations of improved supply conditions, stabilized after reaching their lowest levels in three months.

The focus quickly turned to monetary policy in Japan, where the Bank of Japan raised its benchmark interest rate to 1%, the highest level since 1995. The move marks another significant step in the central bank’s efforts to normalize monetary policy after years of ultra-low interest rates. Policymakers cited persistent inflationary pressures and rising energy costs as key reasons for tightening policy.

The rate increase was largely expected by financial markets, limiting its immediate impact on equities. Investors are now looking for signals about the pace of future rate hikes and how the central bank plans to balance inflation control with economic growth.

Across the region, trading remained mixed. South Korean stocks led gains, while some Chinese and Hong Kong markets faced pressure from weaker-than-expected economic data. MSCI’s broad Asia-Pacific index outside Japan recorded only slight gains as traders weighed improving geopolitical conditions against ongoing economic uncertainties.

Analysts say the combination of easing Middle East tensions and tighter monetary policy in Japan could shape market sentiment in the weeks ahead. While the peace agreement has reduced fears of further disruptions to global energy markets, investors remain cautious about the durability of the deal and its long-term economic implications.

For now, markets appear to be balancing optimism over geopolitical progress with concerns about inflation, interest rates, and the broader global growth outlook.